"""
Application Configuration
"""
import os
from datetime import timedelta
from dotenv import load_dotenv

# Load environment variables from .env file
load_dotenv()


class Config:
    """Base configuration"""
    
    # Flask
    SECRET_KEY = os.getenv('SECRET_KEY', 'dev-secret-key-change-in-production')
    DEBUG = False
    TESTING = False
    
    # Session
    PERMANENT_SESSION_LIFETIME = timedelta(hours=8)
    SESSION_COOKIE_SECURE = False
    SESSION_COOKIE_HTTPONLY = True
    SESSION_COOKIE_SAMESITE = 'Lax'
    
    # Database
    DB_HOST = os.getenv('DB_HOST', 'localhost')
    DB_PORT = int(os.getenv('DB_PORT', 3306))
    DB_USER = os.getenv('DB_USER', 'quality_user')
    DB_PASSWORD = os.getenv('DB_PASSWORD', 'password')
    DB_NAME = os.getenv('DB_NAME', 'quality_db')
    
    # Database pool settings
    DB_POOL_SIZE = 10
    DB_POOL_TIMEOUT = 30
    DB_POOL_RECYCLE = 3600
    
    # Application
    APP_PORT = int(os.getenv('APP_PORT', 8080))
    APP_HOST = os.getenv('APP_HOST', '0.0.0.0')
    
    # Logging
    LOG_LEVEL = os.getenv('LOG_LEVEL', 'INFO')
    LOG_DIR = os.getenv('LOG_DIR', './data/logs')
    
    # Upload settings
    MAX_CONTENT_LENGTH = 100 * 1024 * 1024  # 100MB max upload
    UPLOAD_FOLDER = os.getenv('UPLOAD_FOLDER', './data/uploads')
    
    # Ensure directories exist
    os.makedirs(LOG_DIR, exist_ok=True)
    os.makedirs(UPLOAD_FOLDER, exist_ok=True)


class DevelopmentConfig(Config):
    """Development configuration"""
    DEBUG = True
    TESTING = False


class ProductionConfig(Config):
    """Production configuration"""
    DEBUG = False
    TESTING = False
    SESSION_COOKIE_SECURE = True


class TestingConfig(Config):
    """Testing configuration"""
    DEBUG = True
    TESTING = True
    DB_NAME = 'quality_db_test'


# Select configuration based on environment
env = os.getenv('FLASK_ENV', 'production')
if env == 'development':
    ConfigClass = DevelopmentConfig
elif env == 'testing':
    ConfigClass = TestingConfig
else:
    ConfigClass = ProductionConfig