import os
from datetime import timedelta
from dotenv import load_dotenv

load_dotenv()

class Config:
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'dev-secret-key-change-in-production'
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL') or 'sqlite:///quickcare.db'
    SQLALCHEMY_TRACK_MODIFICATIONS = False
    
    # Session configuration - Persistent sessions (never auto-logout)
    SESSION_COOKIE_SECURE = False
    SESSION_COOKIE_HTTPONLY = True
    SESSION_COOKIE_SAMESITE = 'Lax'
    SESSION_COOKIE_DOMAIN = None
    SESSION_COOKIE_NAME = 'quickcare_session_simple'
    SESSION_COOKIE_PATH = '/'
    # Set cookie to expire after 1 year (persists across browser restarts)
    SESSION_COOKIE_EXPIRES = timedelta(days=365)  # 1 year - persistent session
    # Session lifetime - Maximum (1 year) - users logout manually only
    # Users will remain logged in indefinitely until they explicitly logout
    PERMANENT_SESSION_LIFETIME = timedelta(days=365)  # 1 year - users logout manually only
    
    # CSRF Configuration
    WTF_CSRF_ENABLED = False  # Disable CSRF to avoid session conflicts
    
    # Upload configuration
    UPLOAD_FOLDER = 'app/static/uploads'
    MAX_CONTENT_LENGTH = 16 * 1024 * 1024  # 16MB max file size
    
    # Pagination
    POSTS_PER_PAGE = 10
    DOCTORS_PER_PAGE = 12
    
    # Email configuration (for future use)
    MAIL_SERVER = os.environ.get('MAIL_SERVER')
    MAIL_PORT = int(os.environ.get('MAIL_PORT') or 587)
    MAIL_USE_TLS = os.environ.get('MAIL_USE_TLS', 'true').lower() in ['true', 'on', '1']
    MAIL_USERNAME = os.environ.get('MAIL_USERNAME')
    MAIL_PASSWORD = os.environ.get('MAIL_PASSWORD')
    
    # Agora Video Calling Configuration
    AGORA_APP_ID = os.environ.get('AGORA_APP_ID') or 'c9cda7c593234eea8414b65b1c8ba64c'
    AGORA_APP_CERTIFICATE = os.environ.get('AGORA_APP_CERTIFICATE') or '42abe44abd1e45a397dbe8de2c208bab'

    # Agora Cloud Recording: set AGORA_ENABLE_RECORDING=true plus CUSTOMER_ID/SECRET and S3 (or other vendor) keys.
    AGORA_ENABLE_RECORDING = os.environ.get('AGORA_ENABLE_RECORDING', 'false').lower() in ('true', '1', 'yes')
    AGORA_CUSTOMER_ID = os.environ.get('AGORA_CUSTOMER_ID', '')
    AGORA_CUSTOMER_SECRET = os.environ.get('AGORA_CUSTOMER_SECRET', '')
    # Storage for Agora Cloud Recording (see https://docs.agora.io/en/cloud-recording/reference/region-vendor )
    # vendor: 1=Amazon S3, 2=Alibaba, 3=Tencent, 5=Azure, 6=Google, 11=S3-compatible + extensionParams
    AGORA_RECORDING_STORAGE_VENDOR = int(os.environ.get('AGORA_RECORDING_STORAGE_VENDOR', 1))  # 1 = AWS S3
    AGORA_RECORDING_STORAGE_REGION = int(os.environ.get('AGORA_RECORDING_STORAGE_REGION', 0))
    AGORA_RECORDING_STORAGE_BUCKET = os.environ.get('AGORA_RECORDING_STORAGE_BUCKET', '')
    AGORA_RECORDING_STORAGE_ACCESS_KEY = os.environ.get('AGORA_RECORDING_STORAGE_ACCESS_KEY', '')
    AGORA_RECORDING_STORAGE_SECRET_KEY = os.environ.get('AGORA_RECORDING_STORAGE_SECRET_KEY', '')
    
    # Accounts: platform commission and refunds (no patient wallet)
    PLATFORM_COMMISSION_PERCENT = float(os.environ.get('PLATFORM_COMMISSION_PERCENT', 20))
    MIN_PAYOUT_PKR = float(os.environ.get('MIN_PAYOUT_PKR', 1000))
    CANCELLATION_FULL_REFUND_HOURS = int(os.environ.get('CANCELLATION_FULL_REFUND_HOURS', 24))
    CANCELLATION_PARTIAL_REFUND_HOURS = int(os.environ.get('CANCELLATION_PARTIAL_REFUND_HOURS', 2))
    PARTIAL_REFUND_PERCENT = int(os.environ.get('PARTIAL_REFUND_PERCENT', 50))
    DROPPED_CALL_MAX_SECONDS = int(os.environ.get('DROPPED_CALL_MAX_SECONDS', 180))

class DevelopmentConfig(Config):
    DEBUG = True
    SQLALCHEMY_DATABASE_URI = os.environ.get('DEV_DATABASE_URL') or 'sqlite:///quickcare_dev.db'
    TEMPLATES_AUTO_RELOAD = True  # Auto-reload templates in development
    SEND_FILE_MAX_AGE_DEFAULT = 0  # Disable static file caching in development
    # Session configuration for debug mode
    # Maximum session lifetime (1 year) - users logout manually only
    # Auto-logout is disabled - users logout manually only
    # Sessions persist across browser restarts
    PERMANENT_SESSION_LIFETIME = timedelta(days=365)  # 1 year - users logout manually only
    SESSION_COOKIE_EXPIRES = timedelta(days=365)  # 1 year - persistent session across browser restarts

class ProductionConfig(Config):
    DEBUG = False
    SESSION_COOKIE_SECURE = True

class TestingConfig(Config):
    TESTING = True
    SQLALCHEMY_DATABASE_URI = 'sqlite:///:memory:'
    WTF_CSRF_ENABLED = False

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