import logging
import os
from flask import Flask, jsonify
from werkzeug.middleware.proxy_fix import ProxyFix
import logging.config

from common.extensions import (db, bootstrap, cors, csrf, session,
                              minio_client, simple_encryption, metrics, cache_manager, content_manager)
from common.models.user import Tenant, SpecialistMagicLinkTenant
from common.utils.startup_eveai import perform_startup_actions
from config.logging_config import LOGGING
from eveai_chat_client.utils.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


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_chat_client_'

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

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

    logger.info("eveai_chat_client 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)

    # Register Blueprints
    register_blueprints(app)

    # Register Error Handlers
    register_error_handlers(app)

    # Register Cache Handlers
    register_cache_handlers(app)

    # Debugging settings
    if app.config['DEBUG'] is True:
        app.logger.setLevel(logging.DEBUG)

    # Register template filters
    register_filters(app)

    # Perform startup actions such as cache invalidation
    perform_startup_actions(app)

    app.logger.info(f"EveAI Chat Client Started Successfully (PID: {os.getpid()})")
    app.logger.info("-------------------------------------------------------------------------------------------------")
    return app


def register_extensions(app):
    db.init_app(app)
    bootstrap.init_app(app)
    csrf.init_app(app)
    cors.init_app(app)
    simple_encryption.init_app(app)
    session.init_app(app)
    minio_client.init_app(app)
    cache_manager.init_app(app)
    metrics.init_app(app)
    content_manager.init_app(app)


def register_blueprints(app):
    from .views.chat_views import chat_bp
    app.register_blueprint(chat_bp)
    from .views.error_views import error_bp
    app.register_blueprint(error_bp)
    from .views.healthz_views import healthz_bp
    app.register_blueprint(healthz_bp)


def register_cache_handlers(app):
    from common.utils.cache.config_cache import register_config_cache_handlers
    register_config_cache_handlers(cache_manager)
    from common.utils.cache.crewai_processed_config_cache import register_specialist_cache_handlers
    register_specialist_cache_handlers(cache_manager)