import atexit
import logging

import httpx
from flask import Flask, jsonify
from dotenv import load_dotenv
from werkzeug.middleware.proxy_fix import ProxyFix

from .binding import BindingService, SiteBindingRepository
from .bitrix import BitrixAuthError, BitrixClient
from .config import SiteConfig
from .crypto import TokenCipher
from .database import SiteDatabase
from .routes import SiteInputError, create_blueprint

logger = logging.getLogger(__name__)


def create_app() -> Flask:
    load_dotenv()
    logging.getLogger("httpx").setLevel(logging.WARNING)
    logging.getLogger("httpcore").setLevel(logging.WARNING)
    config = SiteConfig.from_env()
    app = Flask(__name__)
    app.config["PUBLIC_BASE_URL"] = config.public_base_url

    if config.trust_proxy:
        # Используется конфигурация, при которой снаружи контейнера находится
        # обратный прокси nginx.
        app.wsgi_app = ProxyFix(
            app.wsgi_app,
            x_for=1,
            x_proto=1,
            x_host=1,
        )

    database = SiteDatabase(config.database_url)
    database.open()
    bitrix = BitrixClient(
        config.bitrix_client_id,
        config.bitrix_client_secret,
        config.oauth_token_url,
    )
    bindings = BindingService(
        SiteBindingRepository(database),
        TokenCipher(config.token_encryption_key),
        config.bot_username,
        config.binding_ttl_seconds,
    )

    app.extensions["database"] = database
    app.register_blueprint(create_blueprint(bindings, bitrix))
    atexit.register(database.close)
    atexit.register(bitrix.close)

    @app.errorhandler(SiteInputError)
    def input_error(error: SiteInputError):
        return jsonify(error=str(error)), 400

    @app.errorhandler(BitrixAuthError)
    def auth_error(error: BitrixAuthError):
        return jsonify(error=str(error)), 403

    @app.errorhandler(httpx.HTTPError)
    def bitrix_error(error: httpx.HTTPError):
        logger.exception("Bitrix request failed")
        return jsonify(error="Не удалось проверить пользователя Bitrix24"), 502

    return app