import os

class Config:
    SECRET_KEY = os.environ.get('SECRET_KEY', 'kpi-dashboard-secret-key-change-in-production')

    _cloud = any(k in os.environ for k in ('AMVERA', 'SPACE_ID', 'SPACE_REPO_NAME', 'SPACE_TITLE', 'HF_API_TOKEN'))
    _db_path = '/data/kpi_dashboard.db' if _cloud else os.path.join(
        os.path.dirname(os.path.abspath(__file__)), 'instance', 'kpi_dashboard.db'
    )

    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL', f'sqlite:///{_db_path}')
    if 'postgresql' in (os.environ.get('DATABASE_URL', '') or ''):
        SQLALCHEMY_DATABASE_URI = SQLALCHEMY_DATABASE_URI.replace('postgres://', 'postgresql://')
    SQLALCHEMY_TRACK_MODIFICATIONS = False
    UPLOAD_FOLDER = '/data/uploads' if _cloud else os.path.join(
        os.path.dirname(os.path.abspath(__file__)), 'uploads'
    )
    MAX_CONTENT_LENGTH = 50 * 1024 * 1024
    ALLOWED_EXTENSIONS = {'xlsx', 'xls', 'pdf'}
    TELEGRAM_BOT_TOKEN = os.environ.get('TELEGRAM_BOT_TOKEN', '')
    TELEGRAM_CHAT_ID = os.environ.get('TELEGRAM_CHAT_ID', '')
    WTF_CSRF_ENABLED = True
    SESSION_COOKIE_SECURE = False
    SESSION_COOKIE_HTTPONLY = True
    SESSION_COOKIE_SAMESITE = 'Lax'
    SCHEDULER_ENABLED = os.environ.get('SCHEDULER_ENABLED', 'False').lower() in ('true', '1', 'yes')
    FACT_SYNC_SCHEDULE = os.environ.get('FACT_SYNC_SCHEDULE', '02:00')
    TEMPLATES_AUTO_RELOAD = True