"""
Configuration management for news crawler
"""
import os
from dotenv import load_dotenv
from pathlib import Path

# Load environment variables from backend/.env
# Try multiple locations (Docker vs local)
env_locations = [
    Path('/app/.env'),  # Docker location
    Path(__file__).parent.parent / 'backend' / '.env',  # Local location
    Path(__file__).parent / '.env',  # Current directory
]

env_loaded = False
for env_path in env_locations:
    if env_path.exists():
        load_dotenv(dotenv_path=env_path)
        print(f"✓ Loaded configuration from: {env_path}")
        env_loaded = True
        break

if not env_loaded:
    print(f"⚠ Warning: .env file not found in any of these locations:")
    for loc in env_locations:
        print(f"  - {loc}")


class Config:
    """Centralized configuration for news crawler"""
    
    # MongoDB Configuration
    MONGODB_URI = os.getenv('MONGODB_URI', 'mongodb://localhost:27017/')
    DB_NAME = 'munich_news'
    
    # Ollama Configuration
    OLLAMA_BASE_URL = os.getenv('OLLAMA_BASE_URL', 'http://localhost:11434')
    OLLAMA_MODEL = os.getenv('OLLAMA_MODEL', 'phi3:latest')
    OLLAMA_API_KEY = os.getenv('OLLAMA_API_KEY', '')
    OLLAMA_ENABLED = os.getenv('OLLAMA_ENABLED', 'false').lower() == 'true'
    OLLAMA_TIMEOUT = int(os.getenv('OLLAMA_TIMEOUT', '30'))
    
    # Crawler Configuration
    RATE_LIMIT_DELAY = 1  # seconds between requests
    MAX_CONTENT_LENGTH = 50000  # characters
    SUMMARY_MAX_WORDS = 150  # maximum words in AI summary
    
    @classmethod
    def print_config(cls):
        """Print current configuration (without sensitive data)"""
        print("\n" + "="*60)
        print("News Crawler Configuration")
        print("="*60)
        print(f"MongoDB URI: {cls.MONGODB_URI}")
        print(f"Database: {cls.DB_NAME}")
        print(f"\nOllama Configuration:")
        print(f"  Base URL: {cls.OLLAMA_BASE_URL}")
        print(f"  Model: {cls.OLLAMA_MODEL}")
        print(f"  Enabled: {cls.OLLAMA_ENABLED}")
        print(f"  Timeout: {cls.OLLAMA_TIMEOUT}s")
        print(f"  Has API Key: {bool(cls.OLLAMA_API_KEY)}")
        print(f"\nCrawler Settings:")
        print(f"  Rate Limit: {cls.RATE_LIMIT_DELAY}s between requests")
        print(f"  Max Content: {cls.MAX_CONTENT_LENGTH} chars")
        print(f"  Summary Length: {cls.SUMMARY_MAX_WORDS} words")
        print("="*60 + "\n")
    
    @classmethod
    def validate(cls):
        """Validate configuration and return list of issues"""
        issues = []
        
        # Check MongoDB
        if not cls.MONGODB_URI:
            issues.append("MONGODB_URI is not set")
        
        # Check Ollama if enabled
        if cls.OLLAMA_ENABLED:
            if not cls.OLLAMA_BASE_URL:
                issues.append("OLLAMA_BASE_URL is not set but Ollama is enabled")
            if not cls.OLLAMA_MODEL:
                issues.append("OLLAMA_MODEL is not set but Ollama is enabled")
            if cls.OLLAMA_TIMEOUT < 5:
                issues.append(f"OLLAMA_TIMEOUT ({cls.OLLAMA_TIMEOUT}s) is too low, recommend at least 5s")
        
        return issues


if __name__ == '__main__':
    # Test configuration
    Config.print_config()
    
    # Validate
    issues = Config.validate()
    if issues:
        print("⚠ Configuration Issues:")
        for issue in issues:
            print(f"  - {issue}")
    else:
        print("✓ Configuration is valid")