"""
Media asset fetcher using Pexels API

This module fetches B-Roll footage based on keywords extracted from:
- PDF content
- Video transcription
- Generated script
"""

import os
import requests
from typing import Dict, Any, List, Optional


class MediaFetcher:
    """Fetch B-Roll videos from Pexels API"""
    
    def __init__(self, api_key: Optional[str] = None):
        self.api_key = api_key or os.getenv("PEXELS_API_KEY")
        if not self.api_key:
            raise ValueError("PEXELS_API_KEY not found in environment")
        
        self.base_url = "https://api.pexels.com/videos/search"
    
    def fetch_broll(self, keywords: List[str], max_per_keyword: int = 3) -> Dict[str, List[str]]:
        """
        Fetch B-Roll videos based on keywords
        
        Args:
            keywords: List of Japanese keywords (will be translated to English)
            max_per_keyword: Maximum videos to fetch per keyword
            
        Returns:
            Dictionary mapping keywords to video URLs
        """
        # TODO: Implement Pexels API integration
        # 1. Translate Japanese keywords to English (using Gemini)
        # 2. Search Pexels for each keyword
        # 3. Download videos to assets/1_processed/broll/
        # 4. Return local file paths
        
        raise NotImplementedError("B-Roll fetching not yet implemented")
    
    def _translate_keyword(self, japanese_keyword: str) -> str:
        """Translate Japanese keyword to English using Gemini"""
        # TODO: Implement translation
        # Use Gemini Pro for accurate translation
        # Cache translations to avoid repeated API calls
        
        return japanese_keyword
    
    def _download_video(self, url: str, output_path: str) -> str:
        """Download video from URL"""
        # TODO: Implement video download
        # Use requests to download
        # Show progress bar
        # Validate video format
        
        return output_path


def fetch_broll(script: Dict[str, Any]) -> Dict[str, Any]:
    """Convenience function for fetching B-Roll assets"""
    # Extract keywords from script
    keywords = []
    for segment in script.get("segments", []):
        # TODO: Extract keywords from segment text
        pass
    
    fetcher = MediaFetcher()
    return fetcher.fetch_broll(keywords)