"""Package initialization for the alt text generator app."""

from pathlib import Path

from flask import Flask

from .cache import AltTextCache
from .config import load_settings
from .immich import ImmichClient
from .openai_client import AltTextGenerator
from .mastodon import MastodonClient


def create_app() -> Flask:
    """Create and configure the Flask application."""
    package_path = Path(__file__).resolve().parent
    project_root = package_path.parent
    app = Flask(
        __name__,
        template_folder=str(project_root / "templates"),
        static_folder=str(project_root / "static"),
    )

    settings = load_settings()
    app.config.update(settings)

    secret_key = app.config.get("SECRET_KEY") or "dev-secret-key"
    app.config["SECRET_KEY"] = secret_key

    instance_dir = Path(app.instance_path)
    instance_dir.mkdir(parents=True, exist_ok=True)

    db_path = app.config.get("STATION_DB")
    if not db_path:
        old_db = instance_dir / "alt_text_cache.db"
        new_db = instance_dir / "station_announcer.db"
        if old_db.exists() and not new_db.exists():
            old_db.rename(new_db)
        db_path = str(new_db)
        app.config["STATION_DB"] = db_path

    app.immich_client = ImmichClient(
        base_url=app.config["IMMICH_API_URL"],
        api_key=app.config["IMMICH_API_KEY"],
    )
    app.alt_text_cache = AltTextCache(db_path)
    app.alt_text_generator = AltTextGenerator(
        api_key=app.config["OPENAI_API_KEY"],
        model=app.config.get("OPENAI_MODEL", "gpt-4o-mini"),
    )
    mastodon_token = app.config.get("MASTODON_ACCESS_TOKEN")
    if mastodon_token:
        app.mastodon_client = MastodonClient(
            base_url=app.config.get("MASTODON_BASE_URL", "http://localhost:3000"),
            access_token=mastodon_token,
        )
    else:
        app.mastodon_client = None

    from . import routes  # pragma: no cover

    app.register_blueprint(routes.bp)

    return app