"""
main.py
=======

Container entry point.  Watches the mounted Suwayomi download directory
and, after a quiet period, triggers SuwayomiMover (which also runs the
Kavita person sync for every processed series).

Mount points (Docker)
---------------------
  /mnt/suwayomi   -> Suwayomi downloads (read/write, sources deleted)
  /mnt/kavita     -> Kavita library      (read/write, CBZs written here)

Environment variables
---------------------
  Required:
    KAVITA_URL          base URL of the Kavita server, e.g. http://kavita:5000
    KAVITA_API_KEY      Kavita API key (Settings → User → API key)

  Optional:
    SUWAYOMI_PATH       default /mnt/suwayomi
    KAVITA_PATH         default /mnt/kavita
    LANGUAGE            default en
    SETTLE_SECONDS      default 600   (10-minute quiet window)
    REQUEST_TIMEOUT     default 30
    DELETE_SOURCE       default true  (delete source folders after pack)
"""

from __future__ import annotations

import os
import signal
import sys
from pathlib import Path

# Make src/ importable when running as `python main.py`.
sys.path.insert(0, str(Path(__file__).resolve().parent / "src"))

from src.SuwayomiMover import SuwayomiMover                       # noqa: E402
from src.SuwayomiFolderWatcher import SuwayomiFolderWatcher       # noqa: E402


def _env_str(name: str, default: "str | None" = None,
             required: bool = False) -> "str | None":
    value = os.environ.get(name, default)
    if required and not value:
        print(f"[main] missing required env var: {name}", flush=True)
        sys.exit(2)
    return value


def _env_int(name: str, default: int) -> int:
    raw = os.environ.get(name)
    if raw is None or raw == "":
        return default
    try:
        return int(raw)
    except ValueError:
        print(f"[main] {name}={raw!r} is not a valid integer; "
              f"falling back to {default}", flush=True)
        return default


def _env_bool(name: str, default: bool) -> bool:
    raw = os.environ.get(name)
    if raw is None:
        return default
    return raw.strip().lower() in ("1", "true", "yes", "y", "on")


def main() -> int:
    suwayomi_path   = _env_str("SUWAYOMI_PATH", "/mnt/suwayomi")
    kavita_path     = _env_str("KAVITA_PATH",   "/mnt/kavita")
    kavita_url      = _env_str("KAVITA_URL",     required=True)
    kavita_api_key  = _env_str("KAVITA_API_KEY", required=True)
    language        = _env_str("LANGUAGE", "en") or "en"
    settle_seconds  = _env_int("SETTLE_SECONDS",  600)
    request_timeout = _env_int("REQUEST_TIMEOUT",  30)
    delete_source   = _env_bool("DELETE_SOURCE",  True)

    print(f"[main] suwayomi  = {suwayomi_path}",  flush=True)
    print(f"[main] kavita    = {kavita_path}",    flush=True)
    print(f"[main] kavita url= {kavita_url}",     flush=True)
    print(f"[main] settle    = {settle_seconds}s", flush=True)
    print(f"[main] language  = {language}",       flush=True)
    print(f"[main] delete src= {delete_source}",  flush=True)

    mover = SuwayomiMover(
        suwayomi_path, kavita_path,
        kavita_base_url=kavita_url,
        kavita_api_key=kavita_api_key,
        language=language,
        request_timeout=request_timeout,
        delete_source=delete_source,
    )

    watcher = SuwayomiFolderWatcher(
        suwayomi_path, mover, settle_seconds=settle_seconds)

    def shutdown(signum, _frame):
        print(f"[main] received signal {signum}", flush=True)
        watcher.stop()

    signal.signal(signal.SIGTERM, shutdown)
    signal.signal(signal.SIGINT,  shutdown)

    watcher.start()
    watcher.wait()   # blocks until stop() is called via a signal
    return 0


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