"""Configuration Flask Application - GMAO Collège"""
import os
from datetime import timedelta

class Config:
    """Configuration de base."""
    SECRET_KEY = os.environ.get('SECRET_KEY', 'change-me-in-production-2025')
    # MariaDB obligatoire, pas de fallback SQLite
    SQLALCHEMY_DATABASE_URI = os.environ.get(
        'DATABASE_URL',
        'mysql+pymysql://gmao:***@/gmao_db?unix_socket=/var/run/mysqld/mysqld.sock&charset=utf8mb4'
    )
    SQLALCHEMY_TRACK_MODIFICATIONS = False
    SQLALCHEMY_ECHO = os.environ.get('FLASK_DEBUG', '0') == '1'

    @classmethod
    def init_app(cls, app):
        database_uri = app.config.get('SQLALCHEMY_DATABASE_URI', '')
        if 'sqlite' in database_uri.lower():
            raise RuntimeError('SQLite is not allowed; configure DATABASE_URL for MariaDB')

        secret_key = str(app.config.get('SECRET_KEY', ''))
        normalized_key = secret_key.strip().lower()
        insecure_markers = ('change-me', 'change_me', 'replace-me', 'remplacer')
        if len(secret_key) < 32 or any(
            marker in normalized_key for marker in insecure_markers
        ):
            raise RuntimeError(
                'SECRET_KEY is missing or insecure; configure a strong, unique value'
            )

    # Configuration de session
    PERMANENT_SESSION_LIFETIME = timedelta(hours=12)
    SESSION_COOKIE_SECURE = os.environ.get('SESSION_COOKIE_SECURE', '0') == '1'
    SESSION_COOKIE_HTTPONLY = True
    SESSION_COOKIE_SAMESITE = 'Lax'

    # Uploads
    UPLOAD_FOLDER = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'uploads')
    MAX_CONTENT_LENGTH = 50 * 1024 * 1024  # 50 MB max

    # Pagination
    ITEMS_PER_PAGE = 20

    # CSRF Protection
    WTF_CSRF_ENABLED = True
    WTF_CSRF_TIME_LIMIT = None

class DevelopmentConfig(Config):
    """Configuration développement."""
    DEBUG = True
    # La machine de développement est accessible à distance : les protections
    # navigateur doivent y être identiques à celles de la production.
    WTF_CSRF_ENABLED = True
    basedir = os.path.abspath(os.path.dirname(__file__))
    # MariaDB obligatoire
    SQLALCHEMY_DATABASE_URI = os.environ.get(
        'DATABASE_URL',
        'mysql+pymysql://gmao:***@/gmao_db?unix_socket=/var/run/mysqld/mysqld.sock&charset=utf8mb4'
    )

class ProductionConfig(Config):
    """Configuration production."""
    DEBUG = False
    SESSION_COOKIE_SECURE = True

class TestingConfig(Config):
    """Configuration tests."""
    TESTING = True
    # Tests doivent aussi utiliser MariaDB via socket Unix
    SQLALCHEMY_DATABASE_URI = os.environ.get(
        'DATABASE_URL',
        'mysql+pymysql://gmao:***@/gmao_test_db?unix_socket=/var/run/mysqld/mysqld.sock&charset=utf8mb4'
    )
    WTF_CSRF_ENABLED = False


config = {
    'development': DevelopmentConfig,
    'production': ProductionConfig,
    'testing': TestingConfig,
    'default': DevelopmentConfig
}