from flask import Flask, jsonify
from flask_login import LoginManager
from settings import Configuration
from db import dbauth
from db import dbapp
from auth.model.checkdb import checkupdates as checkupdatesauth
import os

login_manager = LoginManager()


def init_app():
    app = Flask(__name__)

    config: Configuration = Configuration("/usr/opt/pythonapp/App_Server/root/config.ini")
    _projektname = config.app_projectname

    app.config["SQLALCHEMY_DATABASE_URI"] = "sqlite:////usr/var/pythonappdb/{}.db".format(_projektname)
    app.config["SQLALCHEMY_BINDS"] = {
        "auth": "sqlite:////usr/var/pythonappdb/auth.db",
        "appdb": "sqlite:////usr/var/pythonappdb/{}.db".format(_projektname)
    }
    app.config["DEBUG"] = os.environ.get("APP_DEBUG", "false").lower() in ("true", "1", "yes")
    app.config["PROJEKTNAME"] = config.app_projectname
    app.config["APPID"] = config.app_appid
    app.config["APPVERSION"] = config.clientapp_version
    app.config["SECRET_KEY"] = config.flask_secret

    # Initialize Plugins
    # dbapp ist dasselbe Objekt wie dbauth (siehe db.py); beide teilen sich
    # die SQLAlchemy-Registry. Daher genügt ein einziger init_app-Aufruf, der
    # sowohl den auth- als auch den appdb-Bind initialisiert.
    login_manager.init_app(app)
    dbauth.init_app(app)

    # Globale Fehlerbehandlung für ApplicationExceptionen. Die Route-internen
    # try/except-Blöcke (auth) fangen weiterhin lokal ab; für alle nicht
    # gefangenen Fälle (insbesondere crm) greift dieser Handler.
    from auth.model.errors import ApplicationError, AutorisationError

    @app.errorhandler(ApplicationError)
    def handle_application_error(ex):
        return jsonify(ex.error), ex.htmlstatus

    @app.errorhandler(AutorisationError)
    def handle_autorisation_error(ex):
        return jsonify(ex.error), ex.htmlstatus

    with app.app_context():
        # Include our Routes
        print("before auth.routes", flush=True)
        from auth import routes
        from routes import general
        from crm import routes as crm_routes
        from crm.model import checkdb as crm_checkdb
        checkupdatesauth()
        crm_checkdb.checkupdates()

        # Flask CLI-Befehle (init-db, reset-db) registrieren
        from cli import register_cli_commands
        register_cli_commands(app)

        return app