#!/usr/bin/env python3
"""
Weather Chatbot Configuration
============================

Author: RSK World (https://rskworld.in)
Founded by: Molla Samser
Designer & Tester: Rima Khatun
Contact: +91 93305 39277, hello@rskworld.in, support@rskworld.in
Location: Nutanhat, Mongolkote, Purba Burdwan, West Bengal, India, 713147
Year: 2026

Description: Configuration settings for the Weather Chatbot application
"""

import os
from dotenv import load_dotenv

# Load environment variables
load_dotenv()

class Config:
    """Base configuration class for Weather Chatbot"""
    
    # Basic Flask Configuration
    SECRET_KEY = os.getenv('SECRET_KEY', 'weather-chatbot-secret-key-2026')
    DEBUG = os.getenv('FLASK_DEBUG', 'True').lower() == 'true'
    
    # Server Configuration
    HOST = os.getenv('HOST', '0.0.0.0')
    PORT = int(os.getenv('PORT', 5000))
    
    # API Keys
    OPENWEATHER_API_KEY = os.getenv('OPENWEATHER_API_KEY')
    OPENAI_API_KEY = os.getenv('OPENAI_API_KEY')
    
    # Weather API Configuration
    WEATHER_UNITS = os.getenv('WEATHER_UNITS', 'metric')
    WEATHER_LANGUAGE = os.getenv('WEATHER_LANGUAGE', 'en')
    DEFAULT_CITY = os.getenv('DEFAULT_CITY', 'London')
    
    # OpenWeatherMap API URLs
    OPENWEATHER_BASE_URL = "https://api.openweathermap.org/data/2.5"
    OPENWEATHER_GEO_URL = "http://api.openweathermap.org/geo/1.0"
    
    # Logging Configuration
    LOG_LEVEL = os.getenv('LOG_LEVEL', 'INFO')
    LOG_FILE = os.getenv('LOG_FILE', 'logs/weather_chatbot.log')
    
    # Rate Limiting
    RATE_LIMIT_ENABLED = os.getenv('RATE_LIMIT_ENABLED', 'True').lower() == 'true'
    RATE_LIMIT_PER_MINUTE = int(os.getenv('RATE_LIMIT_PER_MINUTE', 30))
    
    # Cache Configuration
    CACHE_ENABLED = os.getenv('CACHE_ENABLED', 'False').lower() == 'true'
    CACHE_TTL = int(os.getenv('CACHE_TTL', 300))  # 5 minutes
    
    # Database Configuration (for chat history)
    DATABASE_URL = os.getenv('DATABASE_URL', 'sqlite:///weather_chatbot.db')
    
    # CORS Configuration
    CORS_ORIGINS = os.getenv('CORS_ORIGINS', '*').split(',')
    
    # Security Configuration
    SESSION_COOKIE_SECURE = os.getenv('SESSION_COOKIE_SECURE', 'False').lower() == 'true'
    SESSION_COOKIE_HTTPONLY = os.getenv('SESSION_COOKIE_HTTPONLY', 'True').lower() == 'true'
    SESSION_COOKIE_SAMESITE = os.getenv('SESSION_COOKIE_SAMESITE', 'Lax')
    
    # Application Information
    APP_NAME = "Weather Chatbot"
    APP_VERSION = "1.0.0"
    APP_AUTHOR = "RSK World"
    APP_WEBSITE = "https://rskworld.in"
    APP_YEAR = "2026"
    
    # Supported Cities for Quick Access
    SUPPORTED_CITIES = [
        'London', 'New York', 'Paris', 'Tokyo', 'Delhi', 'Mumbai', 
        'Kolkata', 'Chennai', 'Bangalore', 'Sydney', 'Moscow', 
        'Beijing', 'Dubai', 'Singapore', 'Hong Kong'
    ]
    
    # Weather Alert Thresholds
    ALERT_TEMPERATURE_HIGH = 40.0  # Celsius
    ALERT_TEMPERATURE_LOW = -10.0  # Celsius
    ALERT_WIND_SPEED_HIGH = 20.0   # m/s
    ALERT_HUMIDITY_HIGH = 90.0     # Percentage
    
    @staticmethod
    def validate_config():
        """Validate required configuration settings"""
        errors = []
        
        if not Config.OPENWEATHER_API_KEY:
            errors.append("OPENWEATHER_API_KEY is required")
        
        if errors:
            raise ValueError("Configuration validation failed: " + ", ".join(errors))
        
        return True
    
    @staticmethod
    def get_app_info():
        """Get application information"""
        return {
            'name': Config.APP_NAME,
            'version': Config.APP_VERSION,
            'author': Config.APP_AUTHOR,
            'website': Config.APP_WEBSITE,
            'year': Config.APP_YEAR,
            'contact': {
                'phone': '+91 93305 39277',
                'email': 'hello@rskworld.in',
                'support': 'support@rskworld.in'
            },
            'location': 'Nutanhat, Mongolkote, Purba Burdwan, West Bengal, India, 713147'
        }

class DevelopmentConfig(Config):
    """Development configuration"""
    DEBUG = True
    LOG_LEVEL = 'DEBUG'

class ProductionConfig(Config):
    """Production configuration"""
    DEBUG = False
    SESSION_COOKIE_SECURE = True
    LOG_LEVEL = 'WARNING'

class TestingConfig(Config):
    """Testing configuration"""
    TESTING = True
    DEBUG = True
    OPENWEATHER_API_KEY = 'test_key'
    OPENAI_API_KEY = 'test_key'

# Configuration mapping
config_map = {
    'development': DevelopmentConfig,
    'production': ProductionConfig,
    'testing': TestingConfig,
    'default': DevelopmentConfig
}

def get_config(config_name=None):
    """Get configuration based on environment"""
    if config_name is None:
        config_name = os.getenv('FLASK_ENV', 'default')
    
    return config_map.get(config_name, DevelopmentConfig)