const { ipcRenderer } = require('electron');
const path = require('path');

// DOM Elements
const selectDirBtn = document.getElementById('select-dir-btn');
const selectedDirEl = document.getElementById('selected-dir');
const searchInput = document.getElementById('search-input');
const searchResultsEl = document.getElementById('search-results');
const fileListEl = document.getElementById('file-list');
const showDetailsEl = document.getElementById('show-details');

// Current state
let currentDirectory = null;
let currentFiles = [];
let currentShow = null;
let currentSeasons = [];
let currentEpisodes = [];

// Event Listeners
selectDirBtn.addEventListener('click', selectDirectory);
searchInput.addEventListener('input', debounce(searchShows, 300));
document.getElementById('test-api-btn').addEventListener('click', testTVDBAPI);

// Select directory function
async function selectDirectory() {
  try {
    // Use IPC to handle directory selection
    const result = await ipcRenderer.invoke('select-directory');
    
    if (result.success) {
      const directory = result.directory;
      currentDirectory = directory;
      selectedDirEl.textContent = `Selected: ${directory}`;
      
      // Scan the directory for media files
      await scanDirectory(directory);
    } else {
      throw new Error(result.error);
    }
  } catch (error) {
    console.error('Error selecting directory:', error);
    alert(`Error: ${error.message}`);
  }
}

// Scan directory for media files
async function scanDirectory(directoryPath) {
  try {
    const result = await ipcRenderer.invoke('scan-directory', directoryPath);
    
    if (result.success) {
      currentFiles = result.files;
      displayFiles(currentFiles);
    } else {
      throw new Error(result.error);
    }
  } catch (error) {
    console.error('Error scanning directory:', error);
    alert(`Error scanning directory: ${error.message}`);
  }
}

// Display files in the UI
function displayFiles(files) {
  fileListEl.innerHTML = '';
  
  if (files.length === 0) {
    fileListEl.innerHTML = '<p>No media files found in this directory.</p>';
    return;
  }
  
  files.forEach(file => {
    const fileItem = document.createElement('div');
    fileItem.className = 'file-item';
    
    // Use actual duration from file metadata
    const duration = file.duration || '00:00';
    const quality = file.quality || 'unknown';
    const fps = file.fps || 'unknown';
    
    // Add label for problematic files
    const problemLabel = file.isProblematic ? '<span class="problematic-label">⚠️</span> ' : '';
    
    fileItem.innerHTML = `
      <div class="file-name" data-file-path="${file.path}">${problemLabel}${file.name}</div>
      <div class="file-duration">${duration}</div>
      <div class="file-quality">${quality}</div>
      <div class="file-fps">${fps}</div>
    `;
    
    // Add click event to make file name editable
    const fileNameElement = fileItem.querySelector('.file-name');
    fileNameElement.addEventListener('click', function(e) {
      makeEditable(e.target);
    });
    
    fileListEl.appendChild(fileItem);
  });
}

// Make a file name editable
function makeEditable(element) {
  // Prevent editing if already in edit mode
  if (element.contentEditable === 'true') return;
  
  // Store original text
  const originalText = element.textContent;
  
  // Make element editable
  element.contentEditable = 'true';
  element.focus();
  element.classList.add('editing');
  
  // Select all text when editing starts
  const range = document.createRange();
  range.selectNodeContents(element);
  const selection = window.getSelection();
  selection.removeAllRanges();
  selection.addRange(range);
  
  // Handle saving when user finishes editing
  const saveEdit = async function() {
    if (element.textContent.trim() !== originalText.trim()) {
      // Send request to main process to rename the file
      try {
        const result = await ipcRenderer.invoke('rename-file', { 
          oldPath: element.dataset.filePath, 
          newName: element.textContent.trim() 
        });
        
        if (result.success) {
          console.log('File renamed successfully:', result.message);
          // Update the file name in the UI to reflect the change
          element.textContent = element.textContent.trim();
        } else {
          console.error('Failed to rename file:', result.error);
          // Revert to original name on failure
          element.textContent = originalText;
        }
      } catch (error) {
        console.error('Error renaming file:', error);
        // Revert to original name on error
        element.textContent = originalText;
      }
    }
    
    // Clean up
    element.contentEditable = 'false';
    element.classList.remove('editing');
  };
  
  // Save on Enter key or blur
  element.addEventListener('keydown', function(e) {
    if (e.key === 'Enter') {
      e.preventDefault();
      saveEdit();
    }
  });
  
  element.addEventListener('blur', saveEdit);
}

// Search shows function
async function searchShows() {
  const query = searchInput.value.trim();
  
  if (query.length < 2) {
    searchResultsEl.innerHTML = '';
    return;
  }
  
  try {
    const result = await ipcRenderer.invoke('search-tvdb', query);
    
    if (result.success) {
      displaySearchResults(result.results);
    } else {
      throw new Error(result.error);
    }
  } catch (error) {
    console.error('Error searching shows:', error);
    searchResultsEl.innerHTML = `<p>Error: ${error.message}</p>`;
  }
}

// Test TVDB API connectivity
async function testTVDBAPI() {
  try {
    const result = await ipcRenderer.invoke('test-tvdb-api');
    console.log('TVDB API Test:', result);
    if (result.success) {
      console.log('TVDB API is working:', result.message);
      alert('TVDB API Test Successful!\n' + result.message);
    } else {
      console.error('TVDB API test failed:', result.error);
      alert('TVDB API Test Failed!\n' + result.error);
    }
  } catch (error) {
    console.error('Error testing TVDB API:', error);
    alert('Error testing TVDB API: ' + error.message);
  }
}

// Add a test button to the UI (you can add this to the HTML or call it manually)
// For now, we'll just make it available in the console
console.log('TVDB API test function available: testTVDBAPI()');

// Debug function to log problematic file info
async function debugProblematicFile(filePath) {
  try {
    const result = await ipcRenderer.invoke('log-file-info', filePath);
    if (result.success) {
      console.log('File info:', result.fileInfo);
    } else {
      console.error('Failed to get file info:', result.error);
    }
  } catch (error) {
    console.error('Error debugging file:', error);
  }
}

// Display search results
function displaySearchResults(results) {
  searchResultsEl.innerHTML = '';
  
  if (results.length === 0) {
    searchResultsEl.innerHTML = '<p>No shows found.</p>';
    return;
  }
  
  results.forEach(show => {
    const resultItem = document.createElement('div');
    resultItem.className = 'search-result-item';
    
    // Create a more detailed display
    let resultText = show.seriesName || show.name;
    if (show.firstAired) {
      resultText += ` (${show.firstAired})`;
    }
    
    resultItem.textContent = resultText;
    resultItem.addEventListener('click', () => selectShow(show));
    searchResultsEl.appendChild(resultItem);
  });
}

// Select a show and display more details
async function selectShow(show) {
  console.log('Selected show:', show);
  currentShow = show;
  
  // Display show title
  document.getElementById('show-title').textContent = show.seriesName || show.name;
  
  // Fetch show details including seasons
  try {
    const result = await ipcRenderer.invoke('get-show-details', show.id);
    
    if (result.success && result.data) {
      const showData = result.data;
      currentSeasons = showData.seasons || [];
      
      // Display seasons - since we're not getting seasons from the API directly,
      // we'll show a message indicating we need to fetch seasons separately
      if (currentSeasons.length === 0) {
        document.getElementById('seasons-container').innerHTML = '<p>Seasons will be loaded when you click on a season.</p>';
      } else {
        displaySeasons(currentSeasons);
      }
    } else {
      console.error('Failed to fetch show details:', result.error);
      document.getElementById('seasons-container').innerHTML = '<p>Error loading seasons: ' + (result.error || 'Unknown error') + '</p>';
    }
  } catch (error) {
    console.error('Error fetching show details:', error);
    document.getElementById('seasons-container').innerHTML = '<p>Error loading seasons: ' + error.message + '</p>';
  }
}

// Display seasons with episode counts
function displaySeasons(seasons) {
  const seasonsContainer = document.getElementById('seasons-container');
  seasonsContainer.innerHTML = '';
  
  if (!seasons || seasons.length === 0) {
    seasonsContainer.innerHTML = '<p>No seasons available.</p>';
    return;
  }
  
  // Create a container for seasons
  const seasonsList = document.createElement('div');
  seasonsList.style.marginTop = '10px';
  
  seasons.forEach(season => {
    const seasonItem = document.createElement('div');
    seasonItem.className = 'season-item';
    seasonItem.style.padding = '12px';
    seasonItem.style.margin = '8px 0';
    seasonItem.style.border = '1px solid #ddd';
    seasonItem.style.borderRadius = '6px';
    seasonItem.style.cursor = 'pointer';
    seasonItem.style.backgroundColor = '#f8f9fa';
    seasonItem.style.display = 'flex';
    seasonItem.style.justifyContent = 'space-between';
    seasonItem.style.alignItems = 'center';
    
    // Format season display with episode count
    let seasonDisplay = `Season ${season.number}`;
    if (season.type && season.type !== 'Unknown') {
      seasonDisplay += ` (${season.type})`;
    }
    
    const episodeCount = season.episodeCount || 0;
    
    seasonItem.innerHTML = `
      <span>${seasonDisplay}</span>
      <span style="background-color: #007bff; color: white; padding: 4px 8px; border-radius: 12px; font-size: 12px;">
        ${episodeCount} episodes
      </span>
    `;
    
    // Add click event to fetch episodes
    seasonItem.addEventListener('click', () => {
      fetchAndDisplayEpisodes(currentShow.id, season.number);
    });
    
    seasonsList.appendChild(seasonItem);
  });
  
  seasonsContainer.appendChild(seasonsList);
}

// Fetch and display episodes for a season
async function fetchAndDisplayEpisodes(showId, seasonNumber) {
  try {
    // Show loading message while fetching
    document.getElementById('seasons-container').innerHTML = '<p>Loading episodes...</p>';
    
    const result = await ipcRenderer.invoke('get-season-episodes', showId, seasonNumber);
    
    if (result.success && result.data) {
      const episodes = result.data.episodes || [];
      displayEpisodes(episodes);
    } else {
      console.error('Failed to fetch episodes:', result.error);
      document.getElementById('seasons-container').innerHTML = '<p>Error loading episodes: ' + (result.error || 'Unknown error') + '</p>';
    }
  } catch (error) {
    console.error('Error fetching episodes:', error);
    // Show a more user-friendly error message
    document.getElementById('seasons-container').innerHTML = `
      <div style="padding: 10px; background-color: #f8d7da; color: #721c24; border-radius: 4px;">
        <p>Error loading episodes: ${error.message || 'Failed to load episodes'}</p>
        <p style="font-size: 12px; margin-top: 5px;">Note: This may be due to API limitations with the TVDB v4 API.</p>
      </div>
    `;
  }
}

// Display episodes in clean table format
function displayEpisodes(episodes) {
  const seasonsContainer = document.getElementById('seasons-container');
  seasonsContainer.innerHTML = '';
  
  if (!episodes || episodes.length === 0) {
    seasonsContainer.innerHTML = '<p>No episodes available.</p>';
    return;
  }
  
  // Create a container for episodes table
  const episodesTable = document.createElement('div');
  episodesTable.style.marginTop = '10px';
  episodesTable.style.border = '1px solid #ddd';
  episodesTable.style.borderRadius = '6px';
  episodesTable.style.overflow = 'hidden';
  
  // Create table header
  const tableHeader = document.createElement('div');
  tableHeader.style.display = 'grid';
  tableHeader.style.gridTemplateColumns = '1fr 1fr';
  tableHeader.style.backgroundColor = '#f8f9fa';
  tableHeader.style.padding = '10px';
  tableHeader.style.fontWeight = 'bold';
  tableHeader.style.borderBottom = '1px solid #ddd';
  
  tableHeader.innerHTML = `
    <div>Episode Name</div>
    <div>Runtime</div>
  `;
  
  episodesTable.appendChild(tableHeader);
  
  episodes.forEach(episode => {
    const episodeRow = document.createElement('div');
    episodeRow.className = 'episode-item';
    episodeRow.style.display = 'grid';
    episodeRow.style.gridTemplateColumns = '1fr 1fr';
    episodeRow.style.padding = '10px';
    episodeRow.style.borderBottom = '1px solid #eee';
    episodeRow.style.backgroundColor = '#fff';
    episodeRow.style.cursor = 'pointer';
    episodeRow.style.transition = 'background-color 0.2s';
    
    episodeRow.addEventListener('mouseenter', () => {
      episodeRow.style.backgroundColor = '#f5f5f5';
    });
    
    episodeRow.addEventListener('mouseleave', () => {
      episodeRow.style.backgroundColor = '#fff';
    });
    
    // Format episode display
    const episodeName = episode.name || 'Untitled';
    const episodeRuntime = episode.runtime ? `${episode.runtime} min` : 'N/A';
    
    episodeRow.innerHTML = `
      <div style="font-weight: 500;">Episode ${episode.number}: ${episodeName}</div>
      <div style="color: #666;">${episodeRuntime}</div>
    `;
    
    // Add click event (could show more details)
    episodeRow.addEventListener('click', () => {
      alert(`Episode: ${episode.name || 'Untitled'}\nRuntime: ${episode.runtime || 'N/A'} min\nAired: ${episode.aired || 'N/A'}`);
    });
    
    episodesTable.appendChild(episodeRow);
  });
  
  seasonsContainer.appendChild(episodesTable);
}

// Debounce function for search input
function debounce(func, wait) {
  let timeout;
  return function executedFunction(...args) {
    const later = () => {
      clearTimeout(timeout);
      func(...args);
    };
    clearTimeout(timeout);
    timeout = setTimeout(later, wait);
  };
}

// Initialize the application
console.log('Movie Mapper application initialized');