"""Flask application configuration."""

import os
from datetime import timedelta


class Config:
    """Base configuration."""

    # Flask
    SECRET_KEY = os.environ.get('SECRET_KEY', 'dev-secret-key-change-in-production')

    # SQLAlchemy
    SQLALCHEMY_DATABASE_URI = os.environ.get(
        'DATABASE_URL',
        'mysql+pymysql://root:password@localhost:3306/shopdb_flask'
    )
    SQLALCHEMY_TRACK_MODIFICATIONS = False
    SQLALCHEMY_ENGINE_OPTIONS = {
        'pool_pre_ping': True,
        'pool_recycle': 300,
    }

    # JWT
    JWT_SECRET_KEY = os.environ.get('JWT_SECRET_KEY', 'jwt-secret-key-change-in-production')
    JWT_ACCESS_TOKEN_EXPIRES = timedelta(
        seconds=int(os.environ.get('JWT_ACCESS_TOKEN_EXPIRES', 3600))
    )
    JWT_REFRESH_TOKEN_EXPIRES = timedelta(
        seconds=int(os.environ.get('JWT_REFRESH_TOKEN_EXPIRES', 2592000))
    )

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

    # Logging
    LOG_LEVEL = os.environ.get('LOG_LEVEL', 'INFO')

    # Zabbix
    ZABBIX_URL = os.environ.get('ZABBIX_URL', '')
    ZABBIX_TOKEN = os.environ.get('ZABBIX_TOKEN', '')

    # Cache
    CACHE_TYPE = 'SimpleCache'
    CACHE_DEFAULT_TIMEOUT = 600  # 10 minutes

    # Pagination
    DEFAULT_PAGE_SIZE = 20
    MAX_PAGE_SIZE = 100


class DevelopmentConfig(Config):
    """Development configuration."""

    DEBUG = True
    SQLALCHEMY_ECHO = True

    # Use MySQL from DATABASE_URL
    SQLALCHEMY_DATABASE_URI = os.environ.get(
        'DATABASE_URL',
        'mysql+pymysql://root:rootpassword@127.0.0.1:3306/shopdb_flask'
    )
    # Keep pool options from base Config for MySQL


class TestingConfig(Config):
    """Testing configuration."""

    TESTING = True
    SQLALCHEMY_DATABASE_URI = 'sqlite:///:memory:'
    JWT_ACCESS_TOKEN_EXPIRES = timedelta(seconds=5)


class ProductionConfig(Config):
    """Production configuration."""

    DEBUG = False
    SQLALCHEMY_ECHO = False

    # Stricter security in production
    JWT_COOKIE_SECURE = True
    JWT_COOKIE_CSRF_PROTECT = True


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