import React, { useState, useEffect } from 'react';
import { useNavigate } from 'react-router-dom';
import '../App.css';

// Use relative URLs in production, full URLs in development
const isDevelopment = window.location.hostname === 'localhost';
const API_URL = isDevelopment ? 'http://localhost:8000' : '';

interface Podcast {
  id: number;
  title: string;
  description: string;
  audio_file: string;
  filename: string;
  category: string;
}

const Podcasts: React.FC = () => {
  const navigate = useNavigate();
  const [podcasts, setPodcasts] = useState<Podcast[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState("");

  useEffect(() => {
    fetchPodcasts();
  }, []);

  const handleDelete = async (podcast: Podcast) => {
    try {
      const response = await fetch(`${API_URL}/api/audio/${podcast.filename}`, {
        method: 'DELETE',
        headers: {
          'Content-Type': 'application/json',
        }
      });
      
      if (!response.ok) {
        const errorData = await response.text();
        throw new Error(
          `Failed to delete podcast (${response.status}): ${errorData}`
        );
      }
      
      // Refresh the podcast list after successful deletion
      await fetchPodcasts();
      
    } catch (err) {
      console.error('Delete error:', err);
      setError(err instanceof Error ? err.message : 'Failed to delete podcast');
      
      setTimeout(() => setError(""), 5000);
    }
  };

  const fetchPodcasts = async () => {
    try {
      const response = await fetch(`${API_URL}/api/audio-list`);
      if (!response.ok) {
        throw new Error('Failed to fetch podcasts');
      }
      
      const files = await response.json();
      
      if (!Array.isArray(files) || files.length === 0) {
        setPodcasts([]);
        setLoading(false);
        return;
      }
      
      const podcastList: Podcast[] = files.map((file: any, index: number) => {
        const filename = file.filename;
        const parts = filename.split('-');
        let queryPart = '', descriptionPart = '', categoryWithExt = '';
        
        // Handle filenames that might not have all parts
        if (parts.length >= 3) {
          [queryPart, descriptionPart, categoryWithExt] = parts;
        } else {
          queryPart = parts[0] || '';
          descriptionPart = parts[1] || queryPart;
          categoryWithExt = parts[2] || 'general.mp3';
        }
        
        const category = categoryWithExt.replace('.mp3', '');
        
        return {
          id: index + 1,
          title: `${descriptionPart.replace(/_/g, ' ').replace(/^\w/, c => c.toUpperCase())}`,
          description: `A debate exploring ${queryPart.replace(/_/g, ' ')}`,
          audio_file: `${API_URL}${file.path}`, // Add API_URL for audio files
          filename: filename,
          category: category.replace(/_/g, ' ')
        };
      });

      setPodcasts(podcastList);
    } catch (err) {
      console.error('Fetch error:', err);
      setError(err instanceof Error ? err.message : 'An error occurred');
    } finally {
      setLoading(false);
    }
  };

  if (loading) {
    return (
      <div className="podcasts-container">
        <div className="loading-message">Loading podcasts...</div>
      </div>
    );
  }

  return (
    <div className="podcasts-container">
      <header className="podcasts-header">
        <h1>Your Generated Podcasts</h1>
        <p>Listen to AI-generated debate podcasts on various topics</p>
      </header>

      {error && (
        <div className="error-message">Error: {error}</div>
      )}

      <div className="podcasts-grid">
        {podcasts.length > 0 ? (
          podcasts.map(podcast => (
            <div 
              key={podcast.id} 
              className="podcast-card"
              onClick={() => navigate(`/podcast/${podcast.id}`)}
              style={{ cursor: 'pointer' }}
            >
              <div className="podcast-content">
                <div className="podcast-header">
                  <h2 className="podcast-title">{podcast.title}</h2>
                  <button 
                    className="delete-button"
                    onClick={(e) => {
                      e.stopPropagation();
                      handleDelete(podcast);
                    }}
                    aria-label="Delete podcast"
                  >
                    ×
                  </button>
                </div>
                <div className="category-pill">{podcast.category}</div>
                <p className="description">{podcast.description}</p>
                <div className="audio-player" onClick={e => e.stopPropagation()}>
                  <audio 
                    controls
                    src={podcast.audio_file}
                  >
                    Your browser does not support the audio element.
                  </audio>
                </div>
              </div>
            </div>
          ))
        ) : (
          <div className="no-podcasts-message">
            No podcasts found. Generate your first podcast from the home page!
          </div>
        )}
      </div>
    </div>
  );
};

export default Podcasts;