import requests
import json
from typing import Dict, List, Any, Optional
from datetime import datetime, timedelta
import time

from utils.logging import setup_logger
from utils.error_handling import handle_exceptions, IntegrationError
from utils.storage import load_data, save_data

# Initialize logger
logger = setup_logger(__name__)

class NewsIntegration:
    """News API integration for current events"""
    
    def __init__(self, api_key: Optional[str] = None, provider: str = "newsapi"):
        """Initialize News API integration
        
        Args:
            api_key: API key for the news provider (optional)
            provider: News data provider (default: newsapi)
        """
        self.api_key = api_key
        self.provider = provider.lower()
        self.cache = {}
        self.cache_expiry = {}
        
        # Set up provider-specific configurations
        self.providers = {
            "newsapi": {
                "top_headlines_url": "https://newsapi.org/v2/top-headlines",
                "everything_url": "https://newsapi.org/v2/everything",
                "sources_url": "https://newsapi.org/v2/top-headlines/sources",
                "cache_duration": 1800  # 30 minutes
            },
            "gnews": {
                "top_headlines_url": "https://gnews.io/api/v4/top-headlines",
                "search_url": "https://gnews.io/api/v4/search",
                "cache_duration": 1800  # 30 minutes
            }
        }
    
    @handle_exceptions
    def set_api_key(self, api_key: str) -> None:
        """Set API key for the news provider
        
        Args:
            api_key: API key
        """
        self.api_key = api_key
        # Clear cache when API key changes
        self.cache = {}
        self.cache_expiry = {}
    
    @handle_exceptions
    def set_provider(self, provider: str) -> None:
        """Set news data provider
        
        Args:
            provider: News data provider
        """
        provider = provider.lower()
        if provider not in self.providers:
            raise IntegrationError(f"Unsupported news provider: {provider}")
        
        self.provider = provider
        # Clear cache when provider changes
        self.cache = {}
        self.cache_expiry = {}
    
    @handle_exceptions
    def test_connection(self) -> bool:
        """Test news API connection
        
        Returns:
            True if connection is successful, False otherwise
        """
        if not self.api_key:
            logger.error("News API key not set")
            return False
        
        try:
            if self.provider == "newsapi":
                # Test with a simple sources request
                params = {
                    "apiKey": self.api_key,
                    "language": "en"
                }
                response = requests.get(self.providers[self.provider]["sources_url"], params=params)
            
            elif self.provider == "gnews":
                # Test with a simple top headlines request
                params = {
                    "token": self.api_key,
                    "lang": "en",
                    "max": 1
                }
                response = requests.get(self.providers[self.provider]["top_headlines_url"], params=params)
            
            return response.status_code == 200
        
        except Exception as e:
            logger.error(f"News API connection test failed: {str(e)}")
            return False
    
    @handle_exceptions
    def get_top_headlines(self, country: Optional[str] = None, category: Optional[str] = None, 
                        sources: Optional[str] = None, query: Optional[str] = None, 
                        page_size: int = 20, page: int = 1) -> Dict[str, Any]:
        """Get top headlines
        
        Args:
            country: Country code (optional)
            category: News category (optional)
            sources: Comma-separated list of sources (optional)
            query: Search query (optional)
            page_size: Number of results per page (default: 20)
            page: Page number (default: 1)
            
        Returns:
            Top headlines data
        """
        if not self.api_key:
            raise IntegrationError("News API key not set")
        
        # Check cache
        cache_key = f"headlines_{country}_{category}_{sources}_{query}_{page_size}_{page}_{self.provider}"
        if cache_key in self.cache and time.time() < self.cache_expiry.get(cache_key, 0):
            return self.cache[cache_key]
        
        try:
            if self.provider == "newsapi":
                params = {
                    "apiKey": self.api_key,
                    "pageSize": page_size,
                    "page": page
                }
                
                # Add optional parameters
                if country:
                    params["country"] = country
                if category:
                    params["category"] = category
                if sources:
                    params["sources"] = sources
                if query:
                    params["q"] = query
                
                response = requests.get(self.providers[self.provider]["top_headlines_url"], params=params)
                
                if response.status_code != 200:
                    raise IntegrationError(f"Failed to get top headlines: {response.text}")
                
                data = response.json()
                
                # Process data into a standardized format
                headlines = self._process_newsapi_headlines(data)
            
            elif self.provider == "gnews":
                params = {
                    "token": self.api_key,
                    "max": page_size
                }
                
                # Add optional parameters
                if country:
                    params["country"] = country
                if category:
                    params["topic"] = category
                if query:
                    params["q"] = query
                
                response = requests.get(self.providers[self.provider]["top_headlines_url"], params=params)
                
                if response.status_code != 200:
                    raise IntegrationError(f"Failed to get top headlines: {response.text}")
                
                data = response.json()
                
                # Process data into a standardized format
                headlines = self._process_gnews_headlines(data)
            
            else:
                raise IntegrationError(f"Unsupported news provider: {self.provider}")
            
            # Cache the result
            self.cache[cache_key] = headlines
            self.cache_expiry[cache_key] = time.time() + self.providers[self.provider]["cache_duration"]
            
            return headlines
        
        except Exception as e:
            if not isinstance(e, IntegrationError):
                logger.error(f"Failed to get top headlines: {str(e)}")
                raise IntegrationError(f"Failed to get top headlines: {str(e)}")
            raise
    
    @handle_exceptions
    def search_news(self, query: str, from_date: Optional[str] = None, to_date: Optional[str] = None, 
                  language: str = "en", sort_by: str = "publishedAt", 
                  page_size: int = 20, page: int = 1) -> Dict[str, Any]:
        """Search for news articles
        
        Args:
            query: Search query
            from_date: Start date (YYYY-MM-DD, optional)
            to_date: End date (YYYY-MM-DD, optional)
            language: Language code (default: en)
            sort_by: Sort order (relevancy, popularity, publishedAt)
            page_size: Number of results per page (default: 20)
            page: Page number (default: 1)
            
        Returns:
            Search results
        """
        if not self.api_key:
            raise IntegrationError("News API key not set")
        
        # Check cache
        cache_key = f"search_{query}_{from_date}_{to_date}_{language}_{sort_by}_{page_size}_{page}_{self.provider}"
        if cache_key in self.cache and time.time() < self.cache_expiry.get(cache_key, 0):
            return self.cache[cache_key]
        
        try:
            if self.provider == "newsapi":
                params = {
                    "apiKey": self.api_key,
                    "q": query,
                    "language": language,
                    "sortBy": sort_by,
                    "pageSize": page_size,
                    "page": page
                }
                
                # Add optional parameters
                if from_date:
                    params["from"] = from_date
                if to_date:
                    params["to"] = to_date
                
                response = requests.get(self.providers[self.provider]["everything_url"], params=params)
                
                if response.status_code != 200:
                    raise IntegrationError(f"Failed to search news: {response.text}")
                
                data = response.json()
                
                # Process data into a standardized format
                search_results = self._process_newsapi_headlines(data)
            
            elif self.provider == "gnews":
                params = {
                    "token": self.api_key,
                    "q": query,
                    "lang": language,
                    "max": page_size
                }
                
                # Add optional parameters
                if from_date:
                    # Convert YYYY-MM-DD to ISO format
                    try:
                        from_datetime = datetime.strptime(from_date, "%Y-%m-%d")
                        params["from"] = from_datetime.isoformat()
                    except:
                        pass
                
                if to_date:
                    # Convert YYYY-MM-DD to ISO format
                    try:
                        to_datetime = datetime.strptime(to_date, "%Y-%m-%d")
                        params["to"] = to_datetime.isoformat()
                    except:
                        pass
                
                response = requests.get(self.providers[self.provider]["search_url"], params=params)
                
                if response.status_code != 200:
                    raise IntegrationError(f"Failed to search news: {response.text}")
                
                data = response.json()
                
                # Process data into a standardized format
                search_results = self._process_gnews_headlines(data)
            
            else:
                raise IntegrationError(f"Unsupported news provider: {self.provider}")
            
            # Cache the result
            self.cache[cache_key] = search_results
            self.cache_expiry[cache_key] = time.time() + self.providers[self.provider]["cache_duration"]
            
            return search_results
        
        except Exception as e:
            if not isinstance(e, IntegrationError):
                logger.error(f"Failed to search news: {str(e)}")
                raise IntegrationError(f"Failed to search news: {str(e)}")
            raise
    
    @handle_exceptions
    def get_sources(self, category: Optional[str] = None, language: str = "en", 
                  country: Optional[str] = None) -> List[Dict[str, Any]]:
        """Get news sources
        
        Args:
            category: News category (optional)
            language: Language code (default: en)
            country: Country code (optional)
            
        Returns:
            List of news sources
        """
        if not self.api_key:
            raise IntegrationError("News API key not set")
        
        # Check cache
        cache_key = f"sources_{category}_{language}_{country}_{self.provider}"
        if cache_key in self.cache and time.time() < self.cache_expiry.get(cache_key, 0):
            return self.cache[cache_key]
        
        try:
            if self.provider == "newsapi":
                params = {
                    "apiKey": self.api_key,
                    "language": language
                }
                
                # Add optional parameters
                if category:
                    params["category"] = category
                if country:
                    params["country"] = country
                
                response = requests.get(self.providers[self.provider]["sources_url"], params=params)
                
                if response.status_code != 200:
                    raise IntegrationError(f"Failed to get sources: {response.text}")
                
                data = response.json()
                
                # Process data
                if "sources" in data:
                    sources = data["sources"]
                else:
                    sources = []
            
            elif self.provider == "gnews":
                # GNews doesn't have a sources endpoint, so we'll return a placeholder
                sources = []
            
            else:
                raise IntegrationError(f"Unsupported news provider: {self.provider}")
            
            # Cache the result
            self.cache[cache_key] = sources
            self.cache_expiry[cache_key] = time.time() + self.providers[self.provider]["cache_duration"]
            
            return sources
        
        except Exception as e:
            if not isinstance(e, IntegrationError):
                logger.error(f"Failed to get sources: {str(e)}")
                raise IntegrationError(f"Failed to get sources: {str(e)}")
            raise
    
    @handle_exceptions
    def get_categories(self) -> List[str]:
        """Get available news categories
        
        Returns:
            List of news categories
        """
        if self.provider == "newsapi":
            return ["business", "entertainment", "general", "health", "science", "sports", "technology"]
        elif self.provider == "gnews":
            return ["general", "world", "nation", "business", "technology", "entertainment", "sports", "science", "health"]
        else:
            return []
    
    def _process_newsapi_headlines(self, data: Dict[str, Any]) -> Dict[str, Any]:
        """Process NewsAPI headlines data
        
        Args:
            data: Raw API response data
            
        Returns:
            Processed headlines data
        """
        articles = []
        
        for article in data.get("articles", []):
            # Process article data
            processed_article = {
                "title": article.get("title", ""),
                "description": article.get("description", ""),
                "content": article.get("content", ""),
                "url": article.get("url", ""),
                "image_url": article.get("urlToImage", ""),
                "published_at": article.get("publishedAt", ""),
                "source": {
                    "id": article.get("source", {}).get("id", ""),
                    "name": article.get("source", {}).get("name", "")
                },
                "author": article.get("author", "")
            }
            
            articles.append(processed_article)
        
        return {
            "status": data.get("status", ""),
            "total_results": data.get("totalResults", 0),
            "articles": articles
        }
    
    def _process_gnews_headlines(self, data: Dict[str, Any]) -> Dict[str, Any]:
        """Process GNews headlines data
        
        Args:
            data: Raw API response data
            
        Returns:
            Processed headlines data
        """
        articles = []
        
        for article in data.get("articles", []):
            # Process article data
            processed_article = {
                "title": article.get("title", ""),
                "description": article.get("description", ""),
                "content": article.get("content", ""),
                "url": article.get("url", ""),
                "image_url": article.get("image", ""),
                "published_at": article.get("publishedAt", ""),
                "source": {
                    "id": "",  # GNews doesn't provide source ID
                    "name": article.get("source", {}).get("name", "")
                },
                "author": ""  # GNews doesn't provide author information
            }
            
            articles.append(processed_article)
        
        return {
            "status": "ok" if "articles" in data else "error",
            "total_results": len(data.get("articles", [])),
            "articles": articles
        }