"""Flask hängt die API und die Seiten an den Kern."""

import json
import re
import secrets
import time
import uuid
from datetime import datetime
from pathlib import Path
from urllib.parse import quote

import markdown
import psycopg
from flask import Flask, abort, g, jsonify, redirect, render_template, request, session, url_for
from markupsafe import Markup
from psycopg.rows import dict_row

from grotti import auth as grotti_auth
from grotti import config as grotti_config
from grotti import eject, jobs, library, moonraker, notify, store
from grotti.catalog import color_catalog
from grotti.cost import calculate
from grotti.errors import GrottiError
from grotti.printers import FAMILY_LABELS, family_from_name
from grotti.print_queue import PrintQueueDispatcher
from grotti.send_queue import SendQueue
from grotti.toolpath import TOOLPATH_VERSION, build_toolpath
from grotti.version import __version__
from grotti.watcher import StateWatcher

ROOT = Path(__file__).resolve().parent
TOOL_ROOT = ROOT.parent
DOCS_DIR = TOOL_ROOT / "docs"
PROJECT_STATUS = {"idee", "bereit", "druckt", "fertig"}
VERDICTS = {"", "gut", "ausschuss"}
IDEA_STATUS = {"offen", "spaeter", "erledigt"}
PRINTER_FAMILIES = set(FAMILY_LABELS) | {""}
STEER_ACTIONS = {
    "nozzle", "bed", "speed", "flow", "fan", "emergency_stop", "clear_error",
    "exclude_object",
}


def create_app(cfg):
    app = Flask(
        __name__,
        template_folder=str(ROOT / "templates"),
        static_folder=str(ROOT / "static"),
    )
    app.config["GROTTI"] = cfg
    app.config["SECRET_KEY"] = cfg.get("secret_key") or secrets.token_hex(32)
    app.config["TEMPLATES_AUTO_RELOAD"] = True
    app.config["MAX_CONTENT_LENGTH"] = 256 * 1024 * 1024
    app.config["SESSION_COOKIE_HTTPONLY"] = True
    app.config["SESSION_COOKIE_SAMESITE"] = "Lax"
    if cfg.get("fqdn", "").startswith("https://"):
        app.config["SESSION_COOKIE_SECURE"] = True
    app.json.ensure_ascii = False
    app.extensions["send_queue"] = SendQueue(cfg["database_url"], cfg)
    watcher = StateWatcher(cfg["database_url"], cfg)
    dispatcher = PrintQueueDispatcher(cfg["database_url"], cfg, watcher=watcher)
    app.extensions["print_queue"] = dispatcher
    app.extensions["watcher"] = watcher
    watcher.start()
    dispatcher.start()

    PUBLIC_PATHS = {
        "/login",
        "/setup",
        "/api/v1/auth/status",
        "/api/v1/auth/login",
        "/api/v1/auth/setup",
        "/api/v1/version",
    }
    ADMIN_API_PREFIXES = (
        "/api/v1/users",
        "/api/v1/einstellungen",
    )
    ADMIN_API_EXACT = {
        "/api/v1/telegram/test",
    }
    ADMIN_METHODS_ON = {
        # Drucker anlegen/ändern/löschen nur Admin
        ("POST", "/api/v1/drucker"),
    }

    def conn():
        if "db" not in g:
            g.db = psycopg.connect(cfg["database_url"], row_factory=dict_row)
        return g.db

    def ensure_csrf():
        if not session.get("csrf"):
            session["csrf"] = grotti_auth.new_csrf()
        return session["csrf"]

    def auth_user():
        return getattr(g, "user", None)

    def require_role(need):
        user = auth_user()
        if not user or not grotti_auth.role_at_least(user.get("role"), need):
            raise GrottiError("Keine Berechtigung.", "forbidden", 403)
        return user

    def resolve_bearer(presented):
        legacy = cfg.get("token") or ""
        if legacy and secrets.compare_digest(presented, legacy):
            return {
                "id": None,
                "username": "legacy-token",
                "role": "admin",
                "auth": "legacy",
            }
        if not presented.startswith(grotti_auth.TOKEN_PREFIX):
            return None
        row = store.get_api_token_by_hash(conn(), grotti_auth.hash_token(presented))
        if not row or row.get("revoked_at") or not row.get("user_active"):
            return None
        if row.get("expires_at") and row["expires_at"].timestamp() < time.time():
            return None
        store.touch_api_token(conn(), row["id"])
        return {
            "id": row["user_id"],
            "username": row["username"],
            "role": row["role"],
            "auth": "token",
            "token_id": row["id"],
        }

    def resolve_session_user():
        uid = session.get("user_id")
        if not uid:
            return None
        row = store.get_user(conn(), uid)
        if not row or not row.get("active"):
            session.clear()
            return None
        return {
            "id": row["id"],
            "username": row["username"],
            "role": row["role"],
            "auth": "session",
        }

    def wants_json():
        if request.path.startswith("/api/"):
            return True
        accept = request.accept_mimetypes
        return accept.best == "application/json"

    @app.before_request
    def check_auth():
        g.user = None
        path = request.path
        if path.startswith("/static/"):
            return None
        if path in PUBLIC_PATHS:
            return None

        users_exist = store.user_count(conn()) > 0
        if not users_exist:
            if path.startswith("/api/") and path != "/api/v1/auth/setup":
                if path == "/api/v1/auth/status":
                    return None
                return jsonify({
                    "error": "Zuerst Admin anlegen.",
                    "code": "setup",
                    "setup": True,
                }), 503
            if path != "/setup":
                return redirect(url_for("setup_page"))
            return None

        presented = ""
        header = request.headers.get("Authorization", "")
        if header.startswith("Bearer "):
            presented = header[7:].strip()
        elif request.method == "GET" and request.path.startswith("/api/"):
            presented = (request.args.get("token") or "").strip()

        user = None
        if presented:
            user = resolve_bearer(presented)
            if not user:
                return jsonify({"error": "Token fehlt oder stimmt nicht.", "code": "token"}), 401
        else:
            user = resolve_session_user()

        if not user:
            if wants_json() or path.startswith("/api/"):
                return jsonify({"error": "Anmeldung nötig.", "code": "auth"}), 401
            return redirect(url_for("login_page", next=path))

        g.user = user
        ensure_csrf()

        # CSRF für Cookie-Sessions bei mutierenden API-Calls
        if (
            user.get("auth") == "session"
            and path.startswith("/api/")
            and request.method in ("POST", "PATCH", "PUT", "DELETE")
        ):
            sent = request.headers.get("X-CSRF-Token") or ""
            expected = session.get("csrf") or ""
            if not expected or not secrets.compare_digest(sent, expected):
                return jsonify({"error": "CSRF-Token fehlt oder ungültig.", "code": "csrf"}), 403

        need_admin = False
        if path.startswith(ADMIN_API_PREFIXES) or path in ADMIN_API_EXACT:
            if path == "/api/v1/einstellungen" and request.method == "GET":
                need_admin = False
            elif path == "/api/v1/einstellungen" and request.method == "PATCH":
                # Operator darf nur auto_queue schalten
                payload = request.get_json(silent=True) or {}
                keys = {k for k, v in payload.items() if v is not None}
                need_admin = keys - {"auto_queue"} != set()
            elif path.startswith("/api/v1/users"):
                need_admin = True
            elif request.method != "GET":
                need_admin = True
        if (request.method, path) in ADMIN_METHODS_ON:
            need_admin = True
        if path.startswith("/api/v1/drucker/id/") and request.method in ("PATCH", "DELETE"):
            need_admin = True
        if need_admin and not grotti_auth.role_at_least(user.get("role"), "admin"):
            return jsonify({"error": "Nur für Admins.", "code": "forbidden"}), 403
        return None

    @app.teardown_appcontext
    def close_db(exc):
        conn = g.pop("db", None)
        if not conn:
            return
        try:
            if exc:
                conn.rollback()
            else:
                conn.commit()
        finally:
            conn.close()

    @app.errorhandler(GrottiError)
    def grotti_error(err):
        db = g.get("db")
        if db:
            db.rollback()
        return jsonify({"error": err.message, "code": err.code}), err.status

    def body():
        data = request.get_json(silent=True)
        if not isinstance(data, dict):
            raise GrottiError("JSON-Objekt erwartet.", "json")
        return data

    def optional_id(value):
        if value in (None, "", 0, "0"):
            return None
        try:
            return int(value)
        except (TypeError, ValueError) as exc:
            raise GrottiError("Die Nummer stimmt nicht.", "id") from exc

    def require_host(host):
        if not store.printer_by_host(conn(), host or ""):
            raise GrottiError("Diesen Drucker kennt Grotti nicht.", "drucker", 404)
        return host

    def optional_host(host):
        host = (host or "").strip()
        if host:
            require_host(host)
        return host

    @app.context_processor
    def inject_globals():
        user = auth_user()
        return {
            "version": __version__,
            "csrf": session.get("csrf") or "",
            "current_user": user,
        }

    def page(name, title):
        return render_template(
            name,
            page=name.split(".")[0],
            title=title,
            token="",
        )

    def audit(kind, message, host=""):
        user = auth_user()
        who = (user or {}).get("username") or "?"
        store.add_event(conn(), host, "", kind, "%s · %s" % (who, message))

    @app.get("/login")
    def login_page():
        if store.user_count(conn()) == 0:
            return redirect(url_for("setup_page"))
        if resolve_session_user():
            return redirect("/")
        ensure_csrf()
        return render_template("login.html", title="Anmelden", csrf=session.get("csrf") or "")

    @app.get("/setup")
    def setup_page():
        if store.user_count(conn()) > 0:
            return redirect(url_for("login_page"))
        ensure_csrf()
        return render_template("setup.html", title="Ersten Admin anlegen", csrf=session.get("csrf") or "")

    @app.get("/api/v1/auth/status")
    def auth_status():
        count = store.user_count(conn())
        user = resolve_session_user()
        return jsonify({
            "setup_required": count == 0,
            "authenticated": bool(user or auth_user()),
            "user": grotti_auth.public_user(user) if user else None,
            "oauth_enabled": bool((cfg.get("oauth") or {}).get("enabled")),
            "legacy_token_set": bool(cfg.get("token")),
        })

    @app.post("/api/v1/auth/setup")
    def auth_setup():
        if store.user_count(conn()) > 0:
            raise GrottiError("Setup ist schon erledigt.", "setup", 409)
        data = body()
        username = grotti_auth.validate_username(data.get("username") or "")
        password = grotti_auth.validate_password(data.get("password") or "")
        row = store.create_user(conn(), username, grotti_auth.hash_password(password), "admin")
        store.touch_user_login(conn(), row["id"])
        session.clear()
        session["user_id"] = row["id"]
        session["csrf"] = grotti_auth.new_csrf()
        store.add_event(conn(), "", "", "auth", "Admin %s angelegt" % username)
        return jsonify({"user": grotti_auth.public_user(row), "csrf": session["csrf"]}), 201

    @app.post("/api/v1/auth/login")
    def auth_login():
        if store.user_count(conn()) == 0:
            raise GrottiError("Zuerst Admin anlegen.", "setup", 503)
        key = request.remote_addr or "unknown"
        if not grotti_auth.login_rate_ok(key):
            raise GrottiError("Zu viele Versuche. Bitte warten.", "rate", 429)
        data = body()
        username = (data.get("username") or "").strip()
        password = data.get("password") or ""
        row = store.get_user_by_name(conn(), username)
        if not row or not row.get("active") or not grotti_auth.verify_password(row["password_hash"], password):
            grotti_auth.login_rate_hit(key)
            raise GrottiError("Benutzer oder Passwort falsch.", "auth", 401)
        store.touch_user_login(conn(), row["id"])
        session.clear()
        session["user_id"] = row["id"]
        session["csrf"] = grotti_auth.new_csrf()
        store.add_event(conn(), "", "", "auth", "Login %s" % row["username"])
        return jsonify({"user": grotti_auth.public_user(row), "csrf": session["csrf"]})

    @app.post("/api/v1/auth/logout")
    def auth_logout():
        session.clear()
        return jsonify({"ok": True})

    @app.get("/api/v1/me")
    def me():
        user = require_role("operator")
        return jsonify({"user": {
            "id": user["id"],
            "username": user["username"],
            "role": user["role"],
            "auth": user.get("auth"),
        }, "csrf": ensure_csrf()})

    @app.get("/api/v1/users")
    def users_list():
        require_role("admin")
        return jsonify([grotti_auth.public_user(r) for r in store.list_users(conn())])

    @app.post("/api/v1/users")
    def users_create():
        require_role("admin")
        data = body()
        username = grotti_auth.validate_username(data.get("username") or "")
        password = grotti_auth.validate_password(data.get("password") or "")
        role = grotti_auth.normalize_role(data.get("role") or "operator")
        if store.get_user_by_name(conn(), username):
            raise GrottiError("Benutzer gibt es schon.", "user", 409)
        row = store.create_user(conn(), username, grotti_auth.hash_password(password), role)
        audit("auth", "Benutzer %s (%s) angelegt" % (username, role))
        return jsonify(grotti_auth.public_user(row)), 201

    @app.patch("/api/v1/users/<int:user_id>")
    def users_patch(user_id):
        actor = require_role("admin")
        data = body()
        row = store.get_user(conn(), user_id)
        if not row:
            raise GrottiError("Benutzer fehlt.", "user", 404)
        password_hash = None
        if data.get("password"):
            password_hash = grotti_auth.hash_password(grotti_auth.validate_password(data["password"]))
        role = grotti_auth.normalize_role(data["role"]) if "role" in data else None
        active = data.get("active") if "active" in data else None
        if active is False and row["id"] == actor.get("id"):
            raise GrottiError("Eigenes Konto nicht deaktivieren.", "user")
        if role == "operator" and row["role"] == "admin" and row["id"] == actor.get("id"):
            admins = [u for u in store.list_users(conn()) if u["role"] == "admin" and u["active"]]
            if len(admins) <= 1:
                raise GrottiError("Letzter Admin bleibt Admin.", "user")
        updated = store.update_user(conn(), user_id, password_hash=password_hash, role=role, active=active)
        audit("auth", "Benutzer %s geändert" % row["username"])
        return jsonify(grotti_auth.public_user(updated))

    @app.delete("/api/v1/users/<int:user_id>")
    def users_delete(user_id):
        actor = require_role("admin")
        row = store.get_user(conn(), user_id)
        if not row:
            raise GrottiError("Benutzer fehlt.", "user", 404)
        if row["id"] == actor.get("id"):
            raise GrottiError("Eigenes Konto nicht löschen.", "user")
        if row["role"] == "admin":
            admins = [u for u in store.list_users(conn()) if u["role"] == "admin" and u["active"]]
            if len(admins) <= 1:
                raise GrottiError("Letzter Admin bleibt.", "user")
        store.delete_user(conn(), user_id)
        audit("auth", "Benutzer %s gelöscht" % row["username"])
        return "", 204

    @app.get("/api/v1/tokens")
    def tokens_list():
        user = require_role("operator")
        if user.get("role") == "admin" and request.args.get("all") == "1":
            rows = store.list_api_tokens(conn(), user_id=None)
        else:
            if not user.get("id"):
                return jsonify([])
            rows = store.list_api_tokens(conn(), user_id=user["id"])
        out = []
        for row in rows:
            item = grotti_auth.public_token(row)
            item["username"] = row.get("username")
            out.append(item)
        return jsonify(out)

    @app.post("/api/v1/tokens")
    def tokens_create():
        user = require_role("operator")
        if not user.get("id"):
            raise GrottiError("Legacy-Token: bitte Benutzer-Token anlegen.", "token")
        data = body()
        name = (data.get("name") or "Token").strip()[:80]
        role = grotti_auth.clamp_token_role(user["role"], data.get("role"))
        raw = grotti_auth.new_api_token()
        row = store.create_api_token(
            conn(),
            user["id"],
            name,
            grotti_auth.hash_token(raw),
            grotti_auth.token_prefix(raw),
            role,
        )
        audit("auth", "API-Token „%s“ erzeugt" % name)
        item = grotti_auth.public_token(row)
        item["token"] = raw
        return jsonify(item), 201

    @app.delete("/api/v1/tokens/<int:token_id>")
    def tokens_revoke(token_id):
        user = require_role("operator")
        if user.get("role") == "admin":
            row = store.revoke_api_token(conn(), token_id, user_id=None)
        else:
            row = store.revoke_api_token(conn(), token_id, user_id=user.get("id"))
        if not row:
            raise GrottiError("Token fehlt.", "token", 404)
        audit("auth", "API-Token #%s widerrufen" % token_id)
        return jsonify(grotti_auth.public_token(row))

    def doc_names():
        """Nur Anleitung-*.md — Technik liegt unter docs/internal/ (nicht in der App)."""
        if not DOCS_DIR.is_dir():
            return []
        return sorted(p.stem for p in DOCS_DIR.glob("Anleitung-*.md"))

    ANLEITUNG_ORDER = (
        "Anleitung-Einrichtung",
        "Anleitung-Oberflaeche",
        "Anleitung-Wand",
        "Anleitung-Dateien",
        "Anleitung-ACE",
        "Anleitung-Warteschlange",
        "Anleitung-Material",
        "Anleitung-Einstellungen",
        "Anleitung-Stoerungen",
    )

    def anleitung_list(names=None):
        names = names if names is not None else doc_names()
        anleitung_set = set(names)
        ordered = [n for n in ANLEITUNG_ORDER if n in anleitung_set]
        ordered += sorted(anleitung_set - set(ordered))
        return ordered

    def anleitung_title(name):
        labels = {
            "Anleitung-Einrichtung": "Einrichtung",
            "Anleitung-Oberflaeche": "Oberfläche",
            "Anleitung-Wand": "Druckerwand",
            "Anleitung-Dateien": "Dateien senden",
            "Anleitung-ACE": "ACE und Spulen",
            "Anleitung-Warteschlange": "Warteschlange",
            "Anleitung-Material": "Material und mehr",
            "Anleitung-Einstellungen": "Einstellungen",
            "Anleitung-Stoerungen": "Störungen",
        }
        return labels.get(name, name.replace("Anleitung-", "").replace("-", " "))

    def render_markdown(path):
        """Markdown für die App: Git-relative Bild-/Kapitelpfade → App-URLs."""
        text = path.read_text(encoding="utf-8")
        # docs/… → web/static/… im Repo; unter /doku als /static/…
        text = text.replace("../web/static/", "/static/")
        text = re.sub(
            r"\]\((Anleitung-[A-Za-z0-9_-]+)(?:\.md)?\)",
            r"](/doku/\1)",
            text,
        )
        html = markdown.markdown(text, extensions=["tables", "fenced_code", "sane_lists"])
        return Markup(html)

    @app.get("/")
    def wand():
        return page("wand.html", "Drucker")

    @app.get("/kameras")
    def kameras():
        return page("kameras.html", "Kameras")

    @app.get("/dateien")
    def dateien():
        return page("dateien.html", "Dateien")

    @app.get("/projekte")
    def projekte():
        return page("projekte.html", "Projekte")

    @app.get("/einstellungen")
    def einstellungen_page():
        return page("einstellungen.html", "Einstellungen")

    @app.get("/material")
    def material():
        return page("material.html", "Material")

    @app.get("/etikett/<int:spool_id>")
    def etikett(spool_id):
        row = store.get_spool_row(conn(), spool_id)
        if not row:
            abort(404)
        spool = store.spool_out(row)
        if not spool.get("chargen_nr"):
            store.ensure_spool_codes(conn())
            row = store.get_spool_row(conn(), spool_id)
            spool = store.spool_out(row)
        base = grotti_config.public_base(cfg, request.url_root)
        qr_url = "%s/material?spool=%s" % (base, spool_id)
        return render_template(
            "etikett.html",
            page="etikett",
            title="Etikett %s" % spool["chargen_nr"],
            token="",
            spool=spool,
            qr_url=qr_url,
        )

    @app.get("/protokoll")
    def protokoll():
        return page("protokoll.html", "Protokoll")

    @app.get("/ideen")
    def ideen():
        return page("ideen.html", "Ideen")

    @app.get("/aktivitaet")
    def aktivitaet():
        return page("aktivitaet.html", "Aktivität")

    @app.get("/warteschlange")
    def warteschlange_page():
        return page("warteschlange.html", "Warteschlange")

    @app.get("/doku")
    def doku():
        names = doc_names()
        anleitung = anleitung_list(names)
        return render_template(
            "doku.html",
            page="doku",
            title="Doku",
            token="",
            docs=names,
            anleitung=anleitung,
            anleitung_title=anleitung_title,
        )

    @app.get("/doku/<name>")
    def doku_page(name):
        names = doc_names()
        if name not in names:
            abort(404)
        path = DOCS_DIR / ("%s.md" % name)
        if not path.is_file():
            abort(404)
        anleitung = anleitung_list(names)
        return render_template(
            "doku_page.html",
            page="doku",
            title=anleitung_title(name),
            token="",
            content=render_markdown(path),
            docs=names,
            anleitung=anleitung,
            anleitung_title=anleitung_title,
            current=name,
        )

    @app.get("/api/v1/version")
    def version_info():
        return jsonify({"version": __version__})

    @app.get("/api/v1/einstellungen")
    def settings():
        return jsonify(grotti_config.settings_public(cfg))

    @app.patch("/api/v1/einstellungen")
    def settings_patch():
        data = body()
        energy = data.get("energy") if isinstance(data.get("energy"), dict) else None
        telegram = data.get("telegram") if isinstance(data.get("telegram"), dict) else None
        alerts = data.get("alerts") if isinstance(data.get("alerts"), dict) else None
        auto_queue = data.get("auto_queue") if "auto_queue" in data else None
        fqdn = data.get("fqdn") if "fqdn" in data else None
        return jsonify(grotti_config.save_settings(
            cfg, energy=energy, telegram=telegram, alerts=alerts, auto_queue=auto_queue, fqdn=fqdn,
        ))

    @app.post("/api/v1/telegram/test")
    def telegram_test():
        ok = notify.send_telegram(cfg, "Grotti-Test: Telegram ist verbunden.")
        if not ok:
            raise GrottiError(
                "Telegram nicht erreichbar. Token, Chat-ID und „aktiv“ prüfen.",
                "telegram",
            )
        return jsonify({"ok": True})

    @app.get("/api/v1/drucker")
    @app.get("/api/drucker")  # veraltet — Alias zu /api/v1/drucker
    def printers():
        rows = store.list_printers(conn())
        clears = store.bed_clear_map(conn())
        queues = store.queue_by_host(conn(), rows)

        def attach(item):
            host = item.get("host") or ""
            item["needs_clear"] = bool(clears.get(host))
            queue = queues.get(host) or {}
            item["queue_running"] = queue.get("running")
            item["queue_failed"] = queue.get("failed")
            item["queue_waiting"] = queue.get("waiting", 0)
            item["queue_waiting_next"] = queue.get("waiting_next", "")

        by_id = {row["host"]: row for row in rows}
        if request.args.get("live", "1") == "0":
            for row in rows:
                row["mainsail"] = "http://%s/" % row["host"]
                attach(row)
            return jsonify(rows)
        # Eine Live-Quelle: Watcher. Frischer als 60 s, sonst einmal selbst abfragen.
        watcher = app.extensions["watcher"]
        cached = watcher.by_host()
        age = watcher.age_s()
        if not cached or age is None or age > 60:
            lives = moonraker.snapshot(rows)
        else:
            lives = []
            for row in rows:
                live = cached.get(row["host"])
                if live:
                    item = dict(live)
                    item["name"] = row["name"]
                    item["family"] = row["family"]
                    item["family_label"] = row["family_label"]
                    lives.append(item)
                else:
                    item = dict(row)
                    item["ok"] = False
                    item["state"] = "offline"
                    item["mainsail"] = "http://%s/" % row["host"]
                    lives.append(item)
        for live in lives:
            meta = by_id.get(live.get("host") or "") or {}
            live["locked"] = bool(meta.get("locked"))
            attach(live)
        return jsonify(lives)

    @app.post("/api/v1/drucker")
    def printer_create():
        data = body()
        name = (data.get("name") or "").strip()
        host = (data.get("host") or "").strip()
        if not name:
            raise GrottiError("Der Drucker braucht einen Namen.", "name")
        if not host:
            raise GrottiError("Der Drucker braucht eine IP oder einen Host.", "host")
        family = (data.get("family") or "").strip() or family_from_name(name)
        if family not in PRINTER_FAMILIES:
            raise GrottiError("Unbekannte Druckerfamilie.", "family")
        if store.printer_by_host(conn(), host):
            raise GrottiError("Diesen Host gibt es schon.", "host")
        return jsonify(store.create_printer(conn(), uuid.uuid4(), name, host, family)), 201

    @app.patch("/api/v1/drucker/id/<printer_id>")
    def printer_patch(printer_id):
        data = body()
        current = store.printer_by_id(conn(), printer_id)
        if not current:
            raise GrottiError("Diesen Drucker kennt Grotti nicht.", "drucker", 404)
        name = (data.get("name") if "name" in data else current["name"]) or ""
        name = str(name).strip()
        host = (data.get("host") if "host" in data else current["host"]) or ""
        host = str(host).strip()
        family = data.get("family") if "family" in data else current["family"]
        family = (family or "").strip() or family_from_name(name)
        if not name:
            raise GrottiError("Der Drucker braucht einen Namen.", "name")
        if not host:
            raise GrottiError("Der Drucker braucht eine IP oder einen Host.", "host")
        if family not in PRINTER_FAMILIES:
            raise GrottiError("Unbekannte Druckerfamilie.", "family")
        other = store.printer_by_host(conn(), host)
        if other and str(other["id"]) != str(printer_id):
            raise GrottiError("Diesen Host gibt es schon.", "host")
        locked = data.get("locked") if "locked" in data else current.get("locked")
        row = store.update_printer(conn(), printer_id, name, host, family, locked=bool(locked))
        return jsonify(row)

    @app.delete("/api/v1/drucker/id/<printer_id>")
    def printer_delete(printer_id):
        if not store.delete_printer(conn(), printer_id):
            raise GrottiError("Diesen Drucker kennt Grotti nicht.", "drucker", 404)
        return "", 204

    @app.post("/api/v1/drucker/<host>/<action>")
    def printer_action(host, action):
        require_host(host)
        if action not in ("pause", "fortsetzen", "abbrechen"):
            raise GrottiError("Unbekannter Befehl.", "befehl")
        return jsonify(jobs.control(conn(), host, action))

    @app.post("/api/v1/drucker/<host>/steuern")
    def printer_steer(host):
        require_host(host)
        data = body()
        action = (data.get("action") or "").strip()
        if action not in STEER_ACTIONS:
            raise GrottiError("Unbekannte Steuerung.", "befehl")
        if action in ("emergency_stop", "clear_error", "exclude_object") and not data.get("confirm"):
            raise GrottiError("Bestätigung fehlt.", "bestaetigung")
        return jsonify(jobs.steuern(conn(), host, action, data))

    @app.get("/api/v1/kamera")
    def camera():
        host = require_host(request.args.get("host", ""))
        image = moonraker.camera_image(host)
        if not image:
            abort(404)
        return image[1], 200, {"Content-Type": image[0], "Cache-Control": "no-store"}

    @app.get("/api/v1/vorschau")
    def live_preview():
        host = require_host(request.args.get("host", ""))
        embedded_name = request.args.get("embedded", "")
        if embedded_name:
            png = moonraker.embedded_bytes(host, embedded_name)
            if not png:
                abort(404)
            return png, 200, {"Content-Type": "image/png", "Cache-Control": "private, max-age=300"}
        file_path = request.args.get("file", "").replace("\\", "/")
        if ".." in file_path or ".thumbs/" not in file_path or not file_path.endswith(".png"):
            abort(404)
        try:
            kind, data = moonraker.proxy_image(
                host, "http://%s/server/files/gcodes/%s" % (host, quote(file_path, safe="/"))
            )
        except Exception:
            abort(404)
        return data, 200, {"Content-Type": kind, "Cache-Control": "private, max-age=300"}

    @app.get("/api/v1/projekte")
    def project_list():
        return jsonify(store.list_projects(conn()))

    @app.post("/api/v1/projekte")
    def project_create():
        data = body()
        name = (data.get("name") or "").strip()
        if not name:
            raise GrottiError("Das Projekt braucht einen Namen.", "name")
        status = data.get("status") or "idee"
        if status not in PROJECT_STATUS:
            raise GrottiError("Unbekannter Status.", "status")
        return jsonify(store.create_project(conn(), name, (data.get("notes") or "").strip(), status)), 201

    @app.get("/api/v1/projekte/<int:project_id>")
    def project_get(project_id):
        row = store.get_project(conn(), project_id)
        if not row:
            raise GrottiError("Das Projekt fehlt.", "projekt", 404)
        return jsonify(row)

    @app.patch("/api/v1/projekte/<int:project_id>")
    def project_patch(project_id):
        data = body()
        fields = {}
        if "name" in data:
            name = (data.get("name") or "").strip()
            if not name:
                raise GrottiError("Das Projekt braucht einen Namen.", "name")
            fields["name"] = name
        if "notes" in data:
            fields["notes"] = data.get("notes") or ""
        if "status" in data:
            if data["status"] not in PROJECT_STATUS:
                raise GrottiError("Unbekannter Status.", "status")
            fields["status"] = data["status"]
        row = store.update_project(conn(), project_id, fields)
        if not row:
            raise GrottiError("Das Projekt fehlt.", "projekt", 404)
        return jsonify(row)

    @app.delete("/api/v1/projekte/<int:project_id>")
    def project_delete(project_id):
        if not store.delete_project(conn(), project_id):
            raise GrottiError("Das Projekt fehlt.", "projekt", 404)
        return "", 204

    @app.get("/api/v1/dateien")
    def file_list():
        library.sync_watch(conn(), cfg, force=False)
        return jsonify(store.list_files(conn()))

    @app.post("/api/v1/dateien/neu-lesen")
    def file_rescan():
        result = library.sync_watch(conn(), cfg, force=True)
        result["metadaten"] = library.refresh_file_meta(conn(), force=True)
        return jsonify(result)

    @app.post("/api/v1/dateien")
    def file_upload():
        upload = request.files.get("file")
        if not upload or not upload.filename:
            raise GrottiError("Keine Datei angehängt.", "datei")
        project_id = optional_id(request.form.get("project_id"))
        saved = library.save_upload(conn(), upload.filename, upload.read(), cfg, project_id)
        return jsonify(saved), 201

    @app.get("/api/v1/dateien/<int:file_id>/vorschau")
    def file_preview(file_id):
        row = store.get_file_row(conn(), file_id)
        if not row:
            abort(404)
        png = library.preview_png(row)
        if not png:
            abort(404)
        return png, 200, {"Content-Type": "image/png", "Cache-Control": "private, max-age=300"}

    @app.get("/api/v1/dateien/<int:file_id>/pfad")
    def file_toolpath(file_id):
        row = store.get_file_row(conn(), file_id)
        if not row:
            raise GrottiError("Die Datei fehlt.", "datei", 404)
        path = Path(row["stored_path"])
        if not path.is_file():
            raise GrottiError("Die Datei liegt nicht mehr auf der Platte.", "datei", 404)
        cache_dir = Path(cfg["data_dir"]) / "toolpath"
        cache_dir.mkdir(parents=True, exist_ok=True)
        stamp = "%s-%s-%s-v%s" % (
            file_id,
            int(row.get("mtime") or 0),
            int(row.get("size_bytes") or 0),
            TOOLPATH_VERSION,
        )
        cache_path = cache_dir / (stamp + ".json")
        if cache_path.is_file():
            try:
                data = json.loads(cache_path.read_text(encoding="utf-8"))
            except (OSError, json.JSONDecodeError):
                data = None
        else:
            data = None
        if not isinstance(data, dict) or data.get("version") != TOOLPATH_VERSION:
            data = build_toolpath(path)
            try:
                cache_path.write_text(json.dumps(data), encoding="utf-8")
            except OSError:
                pass
        data["file_id"] = file_id
        data["name"] = row["name"]
        data["version"] = TOOLPATH_VERSION
        resp = jsonify(data)
        resp.headers["Cache-Control"] = "no-store"
        return resp

    @app.patch("/api/v1/dateien/<int:file_id>")
    def file_patch(file_id):
        data = body()
        fields = {}
        if "project_id" in data:
            fields["project_id"] = optional_id(data.get("project_id"))
        if "spool_id" in data:
            spool_id = optional_id(data.get("spool_id"))
            if spool_id and not store.get_spool_row(conn(), spool_id):
                raise GrottiError("Die Spule fehlt.", "spule", 404)
            fields["spool_id"] = spool_id
        row = store.update_file(conn(), file_id, fields)
        if not row:
            raise GrottiError("Die Datei fehlt.", "datei", 404)
        return jsonify(row)

    @app.delete("/api/v1/dateien/<int:file_id>")
    def file_delete(file_id):
        row = store.get_file_row(conn(), file_id)
        if not row:
            raise GrottiError("Die Datei fehlt.", "datei", 404)
        if row["source"] != "upload":
            raise GrottiError("Die Datei kommt aus dem Watch-Ordner und bleibt, solange sie dort liegt.", "watch")
        store.delete_file(conn(), file_id)
        Path(row["stored_path"]).unlink(missing_ok=True)
        return "", 204

    @app.post("/api/v1/senden")
    def send():
        data = body()
        try:
            file_id = int(data.get("file_id"))
        except (TypeError, ValueError) as exc:
            raise GrottiError("Die Datei fehlt.", "datei") from exc
        hosts = data.get("hosts")
        if isinstance(hosts, list):
            hosts = [str(item or "").strip() for item in hosts if str(item or "").strip()]
        else:
            host = (data.get("host") or "").strip()
            hosts = [host] if host else []
        ace_maps = data.get("ace_maps") if isinstance(data.get("ace_maps"), dict) else {}
        if not ace_maps and isinstance(data.get("ace_map"), list) and len(hosts) == 1:
            ace_maps = {hosts[0]: data.get("ace_map")}
        # when_free: in Druckwarteschlange statt sofort starten
        if data.get("when_free"):
            if not bool(data.get("confirm")):
                raise GrottiError("Start braucht eine Bestätigung.", "bestaetigung")
            file_row = store.get_file_row(conn(), file_id)
            if not file_row:
                raise GrottiError("Die Datei fehlt.", "datei", 404)
            family = (data.get("family") or file_row.get("printer_family") or "").strip()
            spool_id = optional_id(data.get("spool_id"))
            bed = bool(data.get("bed_leveling"))
            override = bool(data.get("override_machine"))
            try:
                priority = int(data.get("priority", 100))
            except (TypeError, ValueError):
                priority = 100
            created = []
            targets = hosts or [""]
            for host in targets:
                if host:
                    require_host(host)
                # Nur die Map dieses Hosts — nie die eines anderen Druckers
                # (bei „nächster freier“ host="" bleibt die Map leer bis zum Claim).
                mapping = ace_maps.get(host) if host else []
                if not isinstance(mapping, list):
                    mapping = []
                if host:
                    jobs.assert_filament_enough(conn(), file_row, spool_id, mapping, host)
                created.append(
                    store.enqueue_print(
                        conn(),
                        file_id,
                        host,
                        family if not host else "",
                        priority,
                        spool_id,
                        mapping,
                        bed,
                        override,
                    )
                )
            return jsonify({"jobs": created, "count": len(created), "mode": "when_free"}), 202
        created = app.extensions["send_queue"].enqueue_many(
            conn(),
            file_id,
            hosts,
            bool(data.get("confirm")),
            bool(data.get("override_machine")),
            optional_id(data.get("spool_id")),
            ace_maps,
            bed_leveling=bool(data.get("bed_leveling")),
        )
        return jsonify({"jobs": created, "count": len(created), "mode": "now"}), 202

    @app.get("/api/v1/sende-auftraege")
    def send_list():
        return jsonify(app.extensions["send_queue"].list_jobs())

    @app.get("/api/v1/senden-zuletzt")
    def send_last():
        host = optional_host(request.args.get("host") or "")
        try:
            file_id = int(request.args.get("file_id") or 0)
        except (TypeError, ValueError):
            file_id = 0
        if not host or not file_id:
            raise GrottiError("Host und Datei nötig.", "senden")
        row = store.latest_send_for_file(conn(), host, file_id)
        if not row:
            return jsonify(None)
        return jsonify(row)

    @app.get("/api/v1/senden/<job_id>")
    def send_status(job_id):
        job = app.extensions["send_queue"].get(job_id)
        if not job:
            raise GrottiError("Der Auftrag fehlt.", "auftrag", 404)
        return jsonify(job)

    def enqueue_ablauf_payload(data):
        """Ablauf (Drucken/Abkühlen/Schieben) in die Druckwarteschlange."""
        if not bool(data.get("confirm")):
            raise GrottiError("Start braucht eine Bestätigung.", "bestaetigung")
        hosts = data.get("hosts")
        if isinstance(hosts, list):
            hosts = [str(item or "").strip() for item in hosts if str(item or "").strip()]
        else:
            host = (data.get("host") or "").strip()
            hosts = [host] if host else []
        if not hosts:
            raise GrottiError("Ablauf braucht einen Kobra-3-Drucker.", "drucker")
        for host in hosts:
            require_host(host)
            printer = store.printer_by_host(conn(), host)
            eject.require_kobra_3(printer)
        fallback = {
            "file_id": data.get("file_id"),
            "spool_id": data.get("spool_id"),
            "ace_map": data.get("ace_map") if isinstance(data.get("ace_map"), list) else [],
            "bed_leveling": bool(data.get("bed_leveling")),
            "override_machine": bool(data.get("override_machine")),
        }
        ace_maps = data.get("ace_maps") if isinstance(data.get("ace_maps"), dict) else {}
        steps = eject.normalize_steps(data.get("steps"), fallback)
        for step in steps:
            if step["type"] != "print":
                continue
            if not store.get_file_row(conn(), step["file_id"]):
                raise GrottiError("Die Datei fehlt.", "datei", 404)
        file_id = eject.first_print_file_id(steps)
        try:
            priority = int(data.get("priority", 100))
        except (TypeError, ValueError):
            priority = 100
        try:
            repeat_total = int(data.get("repeat_total", 1))
        except (TypeError, ValueError):
            repeat_total = 1
        repeat_total = max(1, min(99, repeat_total))
        created = []
        for host in hosts:
            mapping = ace_maps.get(host) if isinstance(ace_maps.get(host), list) else None
            host_steps = []
            for step in steps:
                if step["type"] == "print" and mapping is not None:
                    copy = dict(step)
                    copy["ace_map"] = mapping
                    host_steps.append(copy)
                else:
                    host_steps.append(step)
            first = next(s for s in host_steps if s["type"] == "print")
            file_row = store.get_file_row(conn(), first["file_id"])
            jobs.assert_filament_enough(
                conn(),
                file_row,
                first.get("spool_id"),
                first.get("ace_map") or [],
                host,
            )
            created.append(
                store.enqueue_print(
                    conn(),
                    file_id,
                    host,
                    "kobra_3",
                    priority,
                    first.get("spool_id"),
                    first.get("ace_map") or [],
                    bool(first.get("bed_leveling")),
                    bool(first.get("override_machine")),
                    steps=host_steps,
                    repeat_total=repeat_total,
                )
            )
        return {"jobs": created, "count": len(created), "mode": "ablauf"}

    @app.get("/api/v1/druck-queue")
    def print_queue_list():
        try:
            limit = max(1, min(200, int(request.args.get("limit") or 40)))
        except (TypeError, ValueError):
            limit = 40
        return jsonify(store.list_print_queue(conn(), limit=limit))

    @app.get("/api/v1/laeuft")
    def running_now():
        """Was gerade druckt, auch ohne Auftrag in der Queue (Stand des Watchers)."""
        items = []
        for live in app.extensions["watcher"].latest or []:
            state = (live.get("state") or "").lower()
            if state not in ("printing", "paused", "heating"):
                continue
            items.append({
                "host": live.get("host") or "",
                "name": live.get("name") or "",
                "state": state,
                "progress": live.get("progress") or 0,
                "remain": live.get("remain") or 0,
                "filename": live.get("filename") or "",
            })
        return jsonify(items)

    @app.get("/api/v1/aufgaben")
    def open_tasks():
        """Platte belegt und kein Ablauf räumt sie: Hand muss ran."""
        clears = store.bed_clear_map(conn())
        busy = {
            row["host"]
            for row in conn().execute("SELECT DISTINCT host FROM print_queue WHERE status = 'running'").fetchall()
        }
        items = []
        for live in app.extensions["watcher"].latest or []:
            host = live.get("host") or ""
            state = (live.get("state") or "").lower()
            if not clears.get(host) or host in busy or state in ("printing", "paused", "heating"):
                continue
            items.append({
                "host": host,
                "name": live.get("name") or "",
                "state": state,
                "filename": live.get("filename") or "",
            })
        return jsonify(items)

    @app.post("/api/v1/druck-queue")
    def print_queue_create():
        data = body()
        if isinstance(data.get("steps"), list) and data.get("steps"):
            return jsonify(enqueue_ablauf_payload(data)), 202
        if not bool(data.get("confirm")):
            raise GrottiError("Bestätigung fehlt.", "bestaetigung")
        try:
            file_id = int(data.get("file_id"))
        except (TypeError, ValueError) as exc:
            raise GrottiError("Die Datei fehlt.", "datei") from exc
        if not store.get_file_row(conn(), file_id):
            raise GrottiError("Die Datei fehlt.", "datei", 404)
        host = optional_host(data.get("host") or "")
        family = (data.get("family") or "").strip()
        ace_map = data.get("ace_map") if isinstance(data.get("ace_map"), list) else []
        try:
            priority = int(data.get("priority", 100))
        except (TypeError, ValueError):
            priority = 100
        row = store.enqueue_print(
            conn(),
            file_id,
            host,
            family,
            priority,
            optional_id(data.get("spool_id")),
            ace_map,
            bool(data.get("bed_leveling")),
            bool(data.get("override_machine")),
        )
        return jsonify(row), 201

    @app.post("/api/v1/ablauf")
    def ablauf_create():
        return jsonify(enqueue_ablauf_payload(body())), 202

    @app.post("/api/v1/schieben-testen")
    def schieben_testen():
        """Nur Testbahn aus dem Ablauf — nicht die Wand-Quittierung."""
        data = body()
        if not bool(data.get("confirm_empty")):
            raise GrottiError("Bestätigung „Bett ist leer“ fehlt.", "bestaetigung")
        host = require_host((data.get("host") or "").strip())
        printer = store.printer_by_host(conn(), host)
        eject.require_kobra_3(printer)
        live = moonraker.query(host)
        state = (live.get("state") or "").lower()
        if live.get("ok") is False:
            raise GrottiError("Drucker offline.", "offline")
        if state in ("printing", "paused", "heating"):
            raise GrottiError("Drucker ist beschäftigt.", "busy")
        sweep = eject.normalize_sweep(data.get("sweep") if isinstance(data.get("sweep"), dict) else data)
        homed = (live.get("homed_axes") or "").lower()
        try:
            if not all(axis in homed for axis in "xyz"):
                # Bett ist laut Bestätigung leer → richtiges Homing ist sicher
                moonraker.gcode_script(host, "G28", timeout=180)
            moonraker.gcode_script(host, eject.sweep_script(sweep), timeout=180)
        except moonraker.PrinterError as exc:
            raise GrottiError(eject.explain_printer_error(exc.message), "drucker") from exc
        store.set_bed_needs_clear(conn(), host, False, "Schieben-Test")
        return jsonify({"ok": True, "host": host, "sweep": sweep, "message": "Bahn gefahren."})

    @app.post("/api/v1/drucker/<host>/abraeumen")
    def printer_abraeumen(host):
        """Quittierung: Platte ist frei. Fährt keine Bahn — nur für „wenn frei“."""
        data = body()
        if not bool(data.get("confirm")):
            raise GrottiError("Bestätigung fehlt.", "bestaetigung")
        require_host(host)
        store.set_bed_needs_clear(conn(), host, False, "quittiert")
        return jsonify({"ok": True, "host": host, "needs_clear": False, "message": "Platte quittiert."})

    @app.get("/api/v1/abraeumen-defaults")
    def abraeumen_defaults():
        return jsonify({
            "cool": eject.DEFAULT_COOL,
            "sweep": eject.DEFAULT_SWEEP,
            "check": eject.DEFAULT_CHECK,
            "limits": eject.LIMITS,
        })

    @app.patch("/api/v1/druck-queue/<int:item_id>")
    def print_queue_patch(item_id):
        data = body()
        fields = {}
        if "priority" in data:
            try:
                fields["priority"] = int(data.get("priority"))
            except (TypeError, ValueError) as exc:
                raise GrottiError("Priorität muss eine Zahl sein.", "zahl") from exc
        if "status" in data:
            status = data.get("status")
            if status not in ("waiting", "cancelled", "error", "done", "running", "dismissed"):
                raise GrottiError("Unbekannter Status.", "status")
            current_row = store.get_print_queue_row(conn(), item_id)
            if not current_row:
                raise GrottiError("Der Queue-Eintrag fehlt.", "queue", 404)
            # Von außen nur Abbrechen, Verwerfen oder Fortsetzen — kein freies done/running.
            if status == "done":
                raise GrottiError("Status „fertig“ setzt nur Grotti.", "status")
            if status == "running" and not data.get("resume"):
                raise GrottiError("Nur ein gestoppter Ablauf lässt sich fortsetzen.", "status")
            if status == "waiting" and current_row.get("status") not in ("waiting",):
                raise GrottiError("Status lässt sich so nicht setzen.", "status")
            fields["status"] = status
            if status == "running" and data.get("resume"):
                row = current_row
                if row.get("status") != "error" or not row.get("steps"):
                    raise GrottiError("Nur ein gestoppter Ablauf lässt sich fortsetzen.", "status")
                fields["phase"] = ""
                fields["phase_started_at"] = None
                fields["message"] = "Wird fortgesetzt…"
                store.add_event(
                    conn(), row.get("host") or "", row.get("printer_name") or "", "ablauf",
                    "%s Ablauf von Hand fortgesetzt bei Schritt %d (%s)" % (
                        row.get("printer_name") or "",
                        int(row.get("step_index") or 0) + 1,
                        store.print_queue_out(row).get("step_label_current") or "",
                    ),
                    row.get("filename") or "",
                )
            if status == "cancelled":
                fields["message"] = "Abgebrochen."
                fields["phase"] = ""
                fields["phase_started_at"] = None
                row = store.get_print_queue_row(conn(), item_id)
                if row:
                    was_running = row.get("status") == "running"
                    what = "Ablauf" if row.get("steps") else "Auftrag"
                    stopped = ""
                    # laufenden Druck auf dem Host best-effort stoppen
                    if was_running and row.get("host"):
                        try:
                            moonraker.command(row["host"], "abbrechen")
                            stopped = ", Druck gestoppt"
                        except Exception:
                            stopped = ", Druck nicht gestoppt"
                    store.add_event(
                        conn(),
                        row.get("host") or "",
                        row.get("printer_name") or "",
                        "ablauf",
                        "%s %s von Hand %s%s: %s" % (
                            row.get("printer_name") or "Warteschlange",
                            what,
                            "abgebrochen" if was_running else "entfernt",
                            stopped,
                            row.get("filename") or "",
                        ),
                        row.get("filename") or "",
                    )
        if "message" in data:
            fields["message"] = str(data.get("message") or "")
        row = store.update_print_queue(conn(), item_id, fields)
        if not row:
            raise GrottiError("Der Queue-Eintrag fehlt.", "queue", 404)
        return jsonify(row)

    @app.get("/api/v1/ereignisse")
    def events_list():
        unread = request.args.get("unread") == "1"
        try:
            limit = max(1, min(1000, int(request.args.get("limit") or 40)))
        except (TypeError, ValueError):
            limit = 40
        kinds = [k for k in (request.args.get("kind") or "").split(",") if k.strip()]
        since = None
        if request.args.get("since"):
            try:
                since = datetime.fromisoformat(request.args["since"].replace("Z", "+00:00"))
            except ValueError as exc:
                raise GrottiError("since muss ein ISO-Zeitpunkt sein.", "since") from exc
        return jsonify({
            "items": store.list_events(
                conn(),
                limit=limit,
                unread_only=unread,
                host=(request.args.get("host") or "").strip() or None,
                kinds=kinds or None,
                since=since,
            ),
            "unread": store.unread_event_count(conn()),
        })

    @app.post("/api/v1/ereignisse/gelesen")
    def events_read():
        data = body() if request.data else {}
        ids = data.get("ids") if isinstance(data.get("ids"), list) else None
        if ids is not None:
            try:
                ids = [int(item) for item in ids]
            except (TypeError, ValueError) as exc:
                raise GrottiError("IDs müssen Zahlen sein.", "id") from exc
        unread = store.mark_events_read(conn(), ids)
        return jsonify({"unread": unread})

    @app.post("/api/v1/dateien/von-drucker")
    def file_from_printer():
        data = body()
        host = require_host(data.get("host") or "")
        filename = (data.get("filename") or "").strip()
        saved = library.ensure_library_gcode(conn(), cfg, host, filename)
        if not saved:
            raise GrottiError("Datei konnte nicht vom Drucker geladen werden.", "datei")
        return jsonify(saved), 201

    @app.get("/api/v1/materialien")
    def material_list():
        return jsonify(store.list_materials(conn()))

    @app.post("/api/v1/materialien")
    def material_create():
        data = body()
        name = (data.get("name") or "").strip()
        if not name:
            raise GrottiError("Die Sorte braucht einen Namen.", "name")
        machines = data.get("machines") or "beide"
        if machines not in ("beide", "kobra_3", "kobra_s1"):
            raise GrottiError("Unbekannte Maschinenwahl.", "machines")
        try:
            row = store.create_material(
                conn(),
                {
                    "name": name,
                    "brand": (data.get("brand") or "").strip(),
                    "material_type": (data.get("material_type") or "PLA").strip() or "PLA",
                    "density": float(data.get("density") or 1.24),
                    "volumetric": float(data.get("volumetric") or 12),
                    "volumetric_s1": (
                        float(data["volumetric_s1"])
                        if data.get("volumetric_s1") not in (None, "")
                        else None
                    ),
                    "machines": machines,
                    "price_per_kg": float(data.get("price_per_kg") or 0),
                    "note": (data.get("note") or "").strip(),
                },
            )
        except Exception as exc:
            if "unique" in str(exc).lower() or "duplicate" in str(exc).lower():
                raise GrottiError("Eine Sorte mit diesem Namen gibt es schon.", "name") from exc
            raise
        return jsonify(row), 201

    @app.patch("/api/v1/materialien/<int:material_id>")
    def material_patch(material_id):
        data = body()
        fields = {}
        if "name" in data:
            name = (data.get("name") or "").strip()
            if not name:
                raise GrottiError("Die Sorte braucht einen Namen.", "name")
            fields["name"] = name
        if "brand" in data:
            fields["brand"] = (data.get("brand") or "").strip()
        if "material_type" in data:
            fields["material_type"] = (data.get("material_type") or "PLA").strip() or "PLA"
        if "density" in data:
            fields["density"] = float(data.get("density") or 1.24)
        if "volumetric" in data:
            fields["volumetric"] = float(data.get("volumetric") or 12)
        if "volumetric_s1" in data:
            raw = data.get("volumetric_s1")
            fields["volumetric_s1"] = float(raw) if raw not in (None, "") else None
        if "machines" in data:
            machines = data.get("machines") or "beide"
            if machines not in ("beide", "kobra_3", "kobra_s1"):
                raise GrottiError("Unbekannte Maschinenwahl.", "machines")
            fields["machines"] = machines
        if "price_per_kg" in data:
            fields["price_per_kg"] = float(data.get("price_per_kg") or 0)
        if "note" in data:
            fields["note"] = (data.get("note") or "").strip()
        try:
            row = store.update_material(conn(), material_id, fields)
        except Exception as exc:
            if "unique" in str(exc).lower() or "duplicate" in str(exc).lower():
                raise GrottiError("Eine Sorte mit diesem Namen gibt es schon.", "name") from exc
            raise
        if not row:
            raise GrottiError("Die Sorte fehlt.", "material", 404)
        return jsonify(row)

    @app.delete("/api/v1/materialien/<int:material_id>")
    def material_delete(material_id):
        result = store.delete_material(conn(), material_id)
        if result == "in_use":
            raise GrottiError("Sorte ist noch an Spulen gebunden.", "material")
        if not result:
            raise GrottiError("Die Sorte fehlt.", "material", 404)
        return "", 204

    @app.get("/api/v1/farben")
    def color_list_api():
        return jsonify(color_catalog())

    @app.get("/api/v1/ideen")
    def idea_list():
        return jsonify(store.list_ideas(conn()))

    @app.post("/api/v1/ideen")
    def idea_create():
        data = body()
        title = (data.get("title") or "").strip()
        if not title:
            raise GrottiError("Die Idee braucht einen Titel.", "titel")
        status = data.get("status") or "offen"
        if status not in IDEA_STATUS:
            raise GrottiError("Unbekannter Status.", "status")
        return jsonify(store.create_idea(conn(), title, (data.get("body") or "").strip(), status)), 201

    @app.patch("/api/v1/ideen/<int:idea_id>")
    def idea_patch(idea_id):
        data = body()
        fields = {}
        if "title" in data:
            title = (data.get("title") or "").strip()
            if not title:
                raise GrottiError("Die Idee braucht einen Titel.", "titel")
            fields["title"] = title
        if "body" in data:
            fields["body"] = (data.get("body") or "").strip()
        if "status" in data:
            if data.get("status") not in IDEA_STATUS:
                raise GrottiError("Unbekannter Status.", "status")
            fields["status"] = data.get("status")
        row = store.update_idea(conn(), idea_id, fields)
        if not row:
            raise GrottiError("Die Idee fehlt.", "idee", 404)
        return jsonify(row)

    @app.delete("/api/v1/ideen/<int:idea_id>")
    def idea_delete(idea_id):
        if not store.delete_idea(conn(), idea_id):
            raise GrottiError("Die Idee fehlt.", "idee", 404)
        return "", 204

    @app.get("/api/v1/spulen")
    def spool_list():
        return jsonify(store.list_spools(conn()))

    @app.get("/api/v1/spulen/by-code/<path:code>")
    def spool_by_code(code):
        row = store.get_spool_by_code(conn(), code)
        if not row:
            raise GrottiError("Keine Spule mit diesem Code.", "spule", 404)
        return jsonify(row)

    @app.post("/api/v1/spulen")
    def spool_create():
        return jsonify(store.create_spool(conn(), spool_fields(body()))), 201

    @app.patch("/api/v1/spulen/<int:spool_id>")
    def spool_patch(spool_id):
        row = store.update_spool(conn(), spool_id, spool_fields(body(), partial=True, spool_id=spool_id))
        if not row:
            raise GrottiError("Die Spule fehlt.", "spule", 404)
        return jsonify(row)

    @app.post("/api/v1/spulen/<int:spool_id>/einlegen")
    def spool_load(spool_id):
        """Spule an Drucker/Platz legen; vorherige Rolle dort geht ins Regal."""
        data = body()
        host = require_host((data.get("host") or "").strip())
        slot = ace_slot(data.get("ace_slot"))
        spool = store.get_spool_row(conn(), spool_id)
        if not spool:
            raise GrottiError("Die Spule fehlt.", "spule", 404)
        # Alte Rolle am Platz / externe Rolle am Host freimachen
        if slot:
            old = conn().execute(
                "SELECT * FROM spools WHERE printer_host = %s AND ace_slot = %s AND id <> %s",
                (host, slot, spool_id),
            ).fetchall()
        else:
            old = conn().execute(
                "SELECT * FROM spools WHERE printer_host = %s AND ace_slot IS NULL AND id <> %s",
                (host, spool_id),
            ).fetchall()
        for row in old:
            store.update_spool(conn(), row["id"], {"printer_host": "", "ace_slot": None})
            store.add_event(
                conn(),
                host,
                (store.printer_by_host(conn(), host) or {}).get("name") or host,
                "spule",
                "%s: „%s“ ins Regal%s" % (
                    (store.printer_by_host(conn(), host) or {}).get("name") or host,
                    row["name"],
                    (" (Platz %s)" % slot) if slot else "",
                ),
                "",
            )
        updated = store.update_spool(conn(), spool_id, {"printer_host": host, "ace_slot": slot})
        printer = store.printer_by_host(conn(), host) or {}
        store.add_event(
            conn(),
            host,
            printer.get("name") or host,
            "spule",
            "%s: „%s“ eingelegt%s" % (
                printer.get("name") or host,
                updated["name"],
                (" auf Platz %s" % slot) if slot else "",
            ),
            "",
        )
        return jsonify(updated)

    @app.delete("/api/v1/spulen/<int:spool_id>")
    def spool_delete(spool_id):
        if not store.delete_spool(conn(), spool_id):
            raise GrottiError("Die Spule fehlt.", "spule", 404)
        return "", 204

    def spool_fields(data, partial=False, spool_id=None):
        fields = {}
        if not partial or "name" in data:
            name = (data.get("name") or "").strip()
            if not name:
                raise GrottiError("Die Spule braucht einen Namen.", "name")
            fields["name"] = name
        text_keys = ("brand", "material_type", "hersteller_charge")
        for key in text_keys:
            if not partial or key in data:
                fields[key] = (data.get(key) or "").strip()
        if not partial or "colors" in data or "color" in data:
            fields["colors"] = color_list(data.get("colors"))
            label = (data.get("color") or "").strip()
            if not label:
                label = " / ".join(item["name"] for item in fields["colors"])
            fields["color"] = label
        for key, default in (("price_per_kg", 0), ("density", 1.24), ("volumetric", 12), ("remaining_g", 1000)):
            if not partial or key in data:
                try:
                    fields[key] = float(data.get(key, default) or 0)
                except (TypeError, ValueError) as exc:
                    raise GrottiError("%s muss eine Zahl sein." % key, "zahl") from exc
        if not partial or "printer_host" in data:
            fields["printer_host"] = optional_host(data.get("printer_host") or "")
        if not partial or "ace_slot" in data:
            fields["ace_slot"] = ace_slot(data.get("ace_slot"))
        if not partial or "material_id" in data:
            fields["material_id"] = optional_id(data.get("material_id"))
        # Doppelte Plätze verhindern
        host = fields.get("printer_host")
        slot = fields.get("ace_slot")
        if host is None or slot is None:
            current = store.get_spool_row(conn(), spool_id) if spool_id else None
            if host is None and current:
                host = current.get("printer_host") or ""
            if slot is None and current:
                slot = current.get("ace_slot")
        if host and slot:
            taken = conn().execute(
                """
                SELECT id, name FROM spools
                WHERE printer_host = %s AND ace_slot = %s
                  AND (%s::bigint IS NULL OR id <> %s)
                LIMIT 1
                """,
                (host, slot, spool_id, spool_id),
            ).fetchone()
            if taken:
                raise GrottiError(
                    "Platz %s auf diesem Drucker ist schon von „%s“ belegt."
                    % (slot, taken["name"]),
                    "ace",
                    409,
                )
        return fields

    def color_list(raw):
        if raw in (None, ""):
            return []
        if not isinstance(raw, list):
            raise GrottiError("Farben sind eine Liste.", "farbe")
        if len(raw) > 8:
            raise GrottiError("Eine Spule hat höchstens acht Farben.", "farbe")
        colors = []
        for item in raw:
            if isinstance(item, dict):
                name = (item.get("name") or "").strip()
                hex_value = (item.get("hex") or "").strip()
            else:
                raise GrottiError("Eine Farbe stimmt nicht.", "farbe")
            if not re.fullmatch(r"#[0-9A-Fa-f]{6}", hex_value):
                raise GrottiError("Eine Farbe braucht einen Hex-Wert.", "farbe")
            colors.append({"name": name or hex_value, "hex": hex_value.lower()})
        return colors

    def ace_slot(raw):
        if raw in (None, "", 0, "0"):
            return None
        try:
            slot = int(raw)
        except (TypeError, ValueError) as exc:
            raise GrottiError("Der ACE-Platz ist eine Zahl.", "ace") from exc
        if slot < 1 or slot > 8:
            raise GrottiError("Ein ACE hat vier Plätze, ein zweites ACE die Plätze 5 bis 8.", "ace")
        return slot

    @app.post("/api/v1/kalkulation")
    def quote():
        data = body()
        spool = None
        spool_id = optional_id(data.get("spool_id"))
        if spool_id:
            spool = store.get_spool_row(conn(), spool_id)
            if not spool:
                raise GrottiError("Die Spule fehlt.", "spule", 404)
        material = {
            "price_per_kg": spool["price_per_kg"] if spool else float(data.get("price_per_kg") or 0),
            "density": spool["density"] if spool else float(data.get("density") or 1.24),
            "volumetric": spool["volumetric"] if spool else float(data.get("volumetric") or 12),
        }
        job = {
            "weight_g": float(data.get("weight_g") or 0),
            "qty": float(data.get("qty") or 1),
            "waste_percent": float(data.get("waste_percent", cfg["energy"]["waste_percent"]) or 0),
            "utilization": float(data.get("utilization", cfg["energy"]["utilization"]) or 1),
            "watts": float(data.get("watts", cfg["energy"]["watts"]) or 0),
            "euro_per_kwh": float(data.get("euro_per_kwh", cfg["energy"]["euro_per_kwh"]) or 0),
            "dryer_watts": float(data.get("dryer_watts", cfg["energy"]["dryer_watts"]) or 0),
            "dry_hours": float(data.get("dry_hours", cfg["energy"]["dry_hours"]) or 0),
            "price_mode": data.get("price_mode") or "perPart",
            "price": float(data.get("price") or 0),
        }
        result = calculate(job, material)
        payload = {"inputs": job, "material": material, "result": result}
        project_id = optional_id(data.get("project_id"))
        if project_id:
            saved = store.update_project(conn(), project_id, {"quote": payload})
            if not saved:
                raise GrottiError("Das Projekt fehlt.", "projekt", 404)
        return jsonify(payload)

    @app.get("/api/v1/laeufe")
    def run_list():
        return jsonify(store.list_runs(conn()))

    @app.post("/api/v1/laeufe/abgleich")
    def run_sync():
        library.sync_watch(conn(), cfg, force=False)
        return jsonify(jobs.sync_history(conn(), cfg))

    @app.patch("/api/v1/laeufe/<int:run_id>")
    def run_patch(run_id):
        data = body()
        row = None
        if "spool_id" in data and data.get("spool_id"):
            row = jobs.assign_and_deduct(conn(), cfg, run_id, int(data["spool_id"]))
        if "verdict" in data:
            if data["verdict"] not in VERDICTS:
                raise GrottiError("Urteil ist gut oder Ausschuss.", "urteil")
            row = store.set_verdict(conn(), run_id, data["verdict"])
        if row is None:
            current = store.get_run_row(conn(), run_id)
            if not current:
                raise GrottiError("Der Lauf fehlt.", "lauf", 404)
            row = store.run_out(current)
        return jsonify(row)

    return app