import logging
import os
from flask import Flask, render_template, jsonify, flash, redirect, request
from flask_security import SQLAlchemyUserDatastore, LoginForm
from flask_security.signals import user_authenticated
from werkzeug.middleware.proxy_fix import ProxyFix
import logging.config

from common.extensions import (db, migrate, bootstrap, security, mail, login_manager, cors, csrf, session,
                               minio_client, simple_encryption, metrics)
from common.models.user import User, Role, Tenant, TenantDomain
import common.models.interaction
from common.utils.nginx_utils import prefixed_url_for
from config.logging_config import LOGGING
from common.utils.security import set_tenant_session_data
from .errors import register_error_handlers
from common.utils.celery_utils import make_celery, init_celery
from common.utils.template_filters import register_filters
from config.config import get_config
from eveai_app.views.security_forms import ResetPasswordForm


def create_app(config_file=None):
    app = Flask(__name__, static_url_path='/static')

    # Ensure all necessary headers are handled
    app.wsgi_app = ProxyFix(app.wsgi_app, x_for=1, x_proto=1, x_host=1, x_port=1)

    environment = os.getenv('FLASK_ENV', 'development')

    match environment:
        case 'development':
            app.config.from_object(get_config('dev'))
        case 'production':
            app.config.from_object(get_config('prod'))
        case _:
            app.config.from_object(get_config('dev'))

    app.config['SESSION_KEY_PREFIX'] = 'eveai_app_'
    app.config['SECURITY_RESET_PASSWORD_FORM'] = ResetPasswordForm

    try:
        os.makedirs(app.instance_path)
    except OSError:
        pass

    logging.config.dictConfig(LOGGING)
    logger = logging.getLogger(__name__)

    logger.info("eveai_app starting up")

    # Register extensions

    register_extensions(app)

    # Configure CSRF protection
    app.config['WTF_CSRF_CHECK_DEFAULT'] = False  # Disable global CSRF protection
    app.config['WTF_CSRF_TIME_LIMIT'] = None  # Remove time limit for CSRF tokens

    app.celery = make_celery(app.name, app.config)
    init_celery(app.celery, app)

    # Setup Flask-Security-Too
    user_datastore = SQLAlchemyUserDatastore(db, User, Role)
    security.init_app(app, user_datastore)
    user_authenticated.connect(set_tenant_session_data, app)

    # Register Blueprints
    register_blueprints(app)

    # Register Error Handlers
    register_error_handlers(app)

    # Debugging settings
    if app.config['DEBUG'] is True:
        app.logger.setLevel(logging.DEBUG)
        mail_logger = logging.getLogger('flask_mailman')
        mail_logger.setLevel(logging.DEBUG)
        security_logger = logging.getLogger('flask_security')
        security_logger.setLevel(logging.DEBUG)
        sqlalchemy_logger = logging.getLogger('sqlalchemy.engine')
        sqlalchemy_logger.setLevel(logging.DEBUG)
        # log_request_middleware(app)   # Add this when debugging nginx or another proxy

    # Some generic Error Handling Routines
    @app.errorhandler(Exception)
    def handle_exception(e):
        app.logger.error(f"Unhandled Exception: {e}", exc_info=True)
        response = {
            "message": str(e),
            "type": type(e).__name__
        }
        return jsonify(response), 500

    # @app.before_request
    # def before_request():
    #     # app.logger.debug(f"Before request - Session ID: {session.sid}")
    #     app.logger.debug(f"Before request - Session data: {session}")
    #     app.logger.debug(f"Before request - Request headers: {request.headers}")

    # Register template filters
    register_filters(app)

    app.logger.info("EveAI App Server Started Successfully")
    app.logger.info("-------------------------------------------------------------------------------------------------")
    return app


def register_extensions(app):
    db.init_app(app)
    migrate.init_app(app, db)
    bootstrap.init_app(app)
    mail.init_app(app)
    csrf.init_app(app)
    login_manager.init_app(app)
    cors.init_app(app)
    simple_encryption.init_app(app)
    session.init_app(app)
    minio_client.init_app(app)
    metrics.init_app(app)


# Register Blueprints
def register_blueprints(app):
    from .views.user_views import user_bp
    app.register_blueprint(user_bp)
    from .views.basic_views import basic_bp
    app.register_blueprint(basic_bp)
    from .views.document_views import document_bp
    app.register_blueprint(document_bp)
    from .views.security_views import security_bp
    app.register_blueprint(security_bp)
    from .views.interaction_views import interaction_bp
    app.register_blueprint(interaction_bp)
    from .views.healthz_views import healthz_bp, init_healtz
    app.register_blueprint(healthz_bp)
    init_healtz(app)