import os
from pathlib import Path

# Base directory
BASE_DIR = Path(__file__).parent.parent


class Config:
    """Base configuration"""
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'dev-secret-key-change-in-production'

    # Database configuration
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URI') or \
        f'sqlite:///{(BASE_DIR / "backend" / "instance" / "trivia.db").absolute()}'
    SQLALCHEMY_TRACK_MODIFICATIONS = False

    # File upload configuration
    UPLOAD_FOLDER = BASE_DIR / "backend" / "static" / "images"
    MAX_CONTENT_LENGTH = 5 * 1024 * 1024  # 5MB max file size
    ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif'}

    # Audio upload configuration
    AUDIO_FOLDER = BASE_DIR / "backend" / "static" / "audio"
    ALLOWED_AUDIO_EXTENSIONS = {'mp3', 'm4a', 'aac', 'wav'}
    MAX_AUDIO_LENGTH = 300  # 5 minutes in seconds
    MAX_AUDIO_SIZE = 50 * 1024 * 1024  # 50MB

    # Celery configuration
    CELERY_BROKER_URL = os.environ.get('CELERY_BROKER_URL', 'redis://localhost:6379/0')
    CELERY_RESULT_BACKEND = os.environ.get('CELERY_RESULT_BACKEND', 'redis://localhost:6379/0')
    CELERY_TASK_TRACK_STARTED = True
    CELERY_TASK_TIME_LIMIT = 600  # 10 minutes max per task

    # yt-dlp configuration
    YTDLP_FORMAT = 'bestaudio/best'
    YTDLP_POSTPROCESSOR = 'mp3'
    YTDLP_QUALITY = '192'  # kbps

    # CORS configuration
    CORS_ORIGINS = os.environ.get('CORS_ORIGINS', '*').split(',')
    CORS_SUPPORTS_CREDENTIALS = True

    # OIDC/Authelia configuration
    OIDC_ISSUER = os.environ.get('OIDC_ISSUER')
    OIDC_CLIENT_ID = os.environ.get('OIDC_CLIENT_ID', 'trivia-app')
    OIDC_CLIENT_SECRET = os.environ.get('OIDC_CLIENT_SECRET')
    OIDC_REDIRECT_URI = os.environ.get('OIDC_REDIRECT_URI', 'http://localhost:5001/api/auth/callback')
    OIDC_AUDIENCE = os.environ.get('OIDC_AUDIENCE', OIDC_CLIENT_ID)
    FRONTEND_URL = os.environ.get('FRONTEND_URL', 'http://localhost:3000')
    OIDC_JWKS_URI = os.environ.get('OIDC_JWKS_URI')  # Optional, auto-fetched if not set

    # Cookie security
    SESSION_COOKIE_SECURE = os.environ.get('SESSION_COOKIE_SECURE', 'false').lower() == 'true'
    SESSION_COOKIE_HTTPONLY = True
    SESSION_COOKIE_SAMESITE = 'Strict'


class DevelopmentConfig(Config):
    """Development configuration"""
    DEBUG = True
    FLASK_ENV = 'development'


class ProductionConfig(Config):
    """Production configuration"""
    DEBUG = False
    FLASK_ENV = 'production'
    SECRET_KEY = os.environ.get('SECRET_KEY')  # Must be set in production


class TestConfig(Config):
    """Test configuration"""
    TESTING = True
    SQLALCHEMY_DATABASE_URI = 'sqlite:///:memory:'
    WTF_CSRF_ENABLED = False


# Configuration dictionary
config = {
    'development': DevelopmentConfig,
    'production': ProductionConfig,
    'test': TestConfig,
    'default': DevelopmentConfig
}