#!/usr/bin/env python3
"""HMS MediaEngine – Einstiegspunkt.

Startet Engine (GStreamer), Art-Net-Empfang, Web-Server (UI/API/Upload).
Alle Einstellungen (inkl. Art-Net-Mapping) sind in der Web-UI konfigurierbar
und werden in config.json gespeichert.

Usage:
  python3 run.py                     # Standardstart (UI im Browser)
  python3 run.py video1.mp4           # Dateien importieren + als Layer
  python3 run.py --setup              # Nativer Dialog (Port/Fullscreen)
  python3 run.py --bootstrap          # GStreamer pruefen/installieren
  python3 run.py --generate-setup     # Setup-Skripte erzeugen
"""

from __future__ import annotations

import argparse
import signal
import sys
import time
from pathlib import Path

ROOT = Path(__file__).resolve().parent
sys.path.insert(0, str(ROOT))

# Portable GStreamer-Installation (HMS-Portable-Install.command)
# laedt die Umgebungsvariablen, BEVOR gi importiert wird.
_RUNTIME = ROOT / "runtime"
_FW = _RUNTIME / "GStreamer.framework" / "Versions" / "1.0"
if _FW.is_dir():
    import os as _os
    _lib = str(_FW / "lib")
    _os.environ["DYLD_LIBRARY_PATH"] = _lib + ":" + _os.environ.get("DYLD_LIBRARY_PATH", "")
    _gst = str(_FW / "lib" / "gstreamer-1.0")
    _os.environ["GST_PLUGIN_PATH"] = _gst
    _os.environ["GST_PLUGIN_SYSTEM_PATH_1_0"] = _gst
    _gi_types = str(_FW / "lib" / "girepository-1.0")
    _os.environ["GI_TYPELIB_PATH"] = _gi_types + ":" + _os.environ.get("GI_TYPELIB_PATH", "")
    for _v in ("python3.12", "python3.13", "python3.11"):
        _sp = _FW / "lib" / _v / "site-packages"
        if (_sp / "gi").is_dir():
            sys.path.insert(0, str(_sp))
            break
    print(f"[Start] Portable GStreamer aktiv: {_FW}")

import gi  # noqa: E402
gi.require_version("Gst", "1.0")
from gi.repository import Gst  # noqa: E402

Gst.init(None)

from hms_app import config as cfgmod  # noqa: E402
from hms_app.artnet import ArtNetInput  # noqa: E402
from hms_app.engine import MediaEngine  # noqa: E402
from hms_app.media import MediaLibrary  # noqa: E402
from hms_app.server import EngineServer  # noqa: E402


def main() -> int:
    ap = argparse.ArgumentParser(description="HMS MediaEngine")
    ap.add_argument("files", nargs="*", help="Medien-Dateien importieren")
    ap.add_argument("--setup", action="store_true",
                    help="Nativer Einstellungsdialog (tkinter)")
    ap.add_argument("--bootstrap", action="store_true",
                    help="GStreamer pruefen/nachinstallieren")
    ap.add_argument("--generate-setup", action="store_true",
                    help="setup_windows.ps1 / setup_linux.sh erzeugen")
    ap.add_argument("--port", type=int, default=None,
                    help="Web-Port ueberschreibt config.json")
    ap.add_argument("--data-root", type=str, default=None,
                    help="Eigener Datenordner fuer mehrere Instanzen "
                         "(config/media/projekte dort statt neben run.py)")
    args = ap.parse_args()

    if args.generate_setup:
        from hms_app import setup as setupmod
        setupmod.generate_setup_scripts(ROOT)
        return 0

    if args.bootstrap:
        from hms_app import setup as setupmod
        ok = setupmod.check_and_install_dependencies()
        return 0 if ok else 1

    DATA_ROOT = (Path(args.data_root).expanduser().resolve()
                 if args.data_root else ROOT)
    if DATA_ROOT != ROOT:
        DATA_ROOT.mkdir(parents=True, exist_ok=True)

    settings = cfgmod.load(DATA_ROOT)
    if args.port is not None:
        settings["web"]["port"] = args.port

    if args.setup:
        from hms_app import setup as setupmod
        cfg = setupmod.run_setup(settings)
        settings["web"]["port"] = cfg["port"]
        settings["output"]["fullscreen"] = cfg["fullscreen"]
        cfgmod.save(DATA_ROOT, settings)

    library = MediaLibrary(settings, DATA_ROOT)
    library.ensure_dirs()
    engine = MediaEngine(settings, library)
    artnet = ArtNetInput(engine, settings)
    server = EngineServer(engine, artnet, library, settings, DATA_ROOT)

    # CLI-Dateien importieren und als Layer aktivieren
    for f in args.files:
        p = Path(f).expanduser()
        name = library.import_copy(p) if p.exists() else None
        if name:
            engine.add_layer(name)
            print(f"[Start] Importiert + Layer: {name}")
        else:
            print(f"[Start] Import fehlgeschlagen: {f}")

    engine.rebuild()

    # Autostart-Projekt laden (falls konfiguriert und vorhanden)
    auto = settings["engine"].get("autostart_project")
    if auto:
        from hms_app.projects import ProjectStore
        doc = ProjectStore(DATA_ROOT).load(str(auto))
        if doc is not None:
            if engine.load_state(doc.get("state") or {}):
                print(f"[Start] Autostart-Projekt geladen: {auto}")
            else:
                print(f"[Start] Autostart-Projekt fehlgeschlagen: {auto}")
        else:
            print(f"[Start] Autostart-Projekt nicht gefunden: {auto}")

    artnet.start()
    if not server.start():
        return 1

    running = True

    def stop_handler(_sig, _frame):
        nonlocal running
        running = False

    signal.signal(signal.SIGINT, stop_handler)
    signal.signal(signal.SIGTERM, stop_handler)

    print()
    print("=" * 62)
    print("  HMS MediaEngine laeuft")
    print(f"  UI         : http://localhost:{settings['web']['port']}/")
    print(f"  Art-Net    : UDP {settings['artnet']['listen_port']} "
          f"(Universes {settings['artnet']['universes']})")
    print("  Einstellungen (Art-Net, Preview, Layer, Upload): Web-UI")
    print("  Beenden    : Strg+C")
    print("=" * 62)

    try:
        while running:
            time.sleep(1)
    except KeyboardInterrupt:
        pass
    finally:
        print("\nBeende...")
        server.stop()
        artnet.stop()
        engine.stop()
        print("Beendet.")
    return 0


if __name__ == "__main__":
    sys.exit(main())