"""
Sentiment Analysis Bot Configuration
Author: RSK World (https://rskworld.in)
Founded by: Molla Samser
Designer & Tester: Rima Khatun
Contact: help@rskworld.in, +91 93305 39277
Year: 2026
"""

import os
from datetime import timedelta

class Config:
    """Base configuration class"""
    
    # Basic Flask Configuration
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'sentiment-bot-secret-key-2026'
    DEBUG = os.environ.get('FLASK_DEBUG', 'True').lower() == 'true'
    
    # Server Configuration
    HOST = os.environ.get('HOST', '0.0.0.0')
    PORT = int(os.environ.get('PORT', 5000))
    
    # Session Configuration
    PERMANENT_SESSION_LIFETIME = timedelta(hours=24)
    
    # CORS Configuration
    CORS_ORIGINS = ['http://localhost:3000', 'http://localhost:5000', 'http://127.0.0.1:5000']
    
    # Logging Configuration
    LOG_LEVEL = os.environ.get('LOG_LEVEL', 'INFO')
    LOG_FILE = os.environ.get('LOG_FILE', 'sentiment_bot.log')
    
    # Rate Limiting
    RATELIMIT_STORAGE_URL = os.environ.get('RATELIMIT_STORAGE_URL', 'memory://')
    RATELIMIT_DEFAULT = "100 per hour"
    
    # NLP Model Configuration
    SPACY_MODEL = os.environ.get('SPACY_MODEL', 'en_core_web_sm')
    
    # Sentiment Analysis Configuration
    VADER_THRESHOLD_POSITIVE = 0.05
    VADER_THRESHOLD_NEGATIVE = -0.05
    TEXTBLOB_THRESHOLD_POSITIVE = 0.1
    TEXTBLOB_THRESHOLD_NEGATIVE = -0.1
    
    # Response Configuration
    MAX_RESPONSE_LENGTH = 500
    MAX_MESSAGE_LENGTH = 1000
    MAX_CONVERSATION_HISTORY = 100
    
    # File Upload Configuration
    MAX_CONTENT_LENGTH = 16 * 1024 * 1024  # 16MB max file size
    UPLOAD_FOLDER = os.environ.get('UPLOAD_FOLDER', 'uploads')
    
    # Database Configuration (if using database)
    DATABASE_URL = os.environ.get('DATABASE_URL', 'sqlite:///sentiment_bot.db')
    
    # API Configuration
    API_VERSION = 'v1'
    API_PREFIX = f'/api/{API_VERSION}'
    
    # Cache Configuration
    CACHE_TYPE = 'simple'
    CACHE_DEFAULT_TIMEOUT = 300
    
    # Security Configuration
    WTF_CSRF_ENABLED = True
    WTF_CSRF_TIME_LIMIT = 3600
    
    # Analytics Configuration
    ENABLE_ANALYTICS = os.environ.get('ENABLE_ANALYTICS', 'True').lower() == 'true'
    ANALYTICS_RETENTION_DAYS = int(os.environ.get('ANALYTICS_RETENTION_DAYS', 30))

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

class ProductionConfig(Config):
    """Production configuration"""
    DEBUG = False
    LOG_LEVEL = 'WARNING'
    
    # Production security settings
    SESSION_COOKIE_SECURE = True
    SESSION_COOKIE_HTTPONLY = True
    SESSION_COOKIE_SAMESITE = 'Lax'
    
    # Production rate limiting
    RATELIMIT_DEFAULT = "60 per hour"

class TestingConfig(Config):
    """Testing configuration"""
    TESTING = True
    DEBUG = True
    WTF_CSRF_ENABLED = False
    
    # Use in-memory database for testing
    DATABASE_URL = 'sqlite:///:memory:'

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

def get_config():
    """Get configuration based on environment"""
    env = os.environ.get('FLASK_ENV', 'default')
    return config.get(env, config['default'])