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

/**
 * FileManager - Handles file operations
 */
class FileManager {
  constructor() {
  }

  /**
   * Select directory
   * @returns {Promise<Object>} Selection result
   */
  async selectDirectory() {
    try {
      // Use IPC to handle directory selection
      const result = await ipcRenderer.invoke('select-directory');

      if (result.success) {
        return result;
      } else {
        throw new Error(result.error);
      }
    } catch (error) {
      console.error('Error selecting directory:', error);
      return { success: false, error: error.message };
    }
  }

  /**
   * Scan directory for media files
   * @param {string} directoryPath - Directory path
   * @returns {Promise<Object>} Scan result
   */
  async scanDirectory(directoryPath) {
    try {
      const result = await ipcRenderer.invoke('scan-directory', directoryPath);

      if (result.success) {
        return result;
      } else {
        throw new Error(result.error);
      }
    } catch (error) {
      console.error('Error scanning directory:', error);
      return { success: false, error: error.message };
    }
  }

  /**
   * Rename a file
   * @param {string} oldPath - Old file path
   * @param {string} newName - New file name
   * @returns {Promise<Object>} Rename result
   */
  async renameFile(oldPath, newName) {
    try {
      const result = await ipcRenderer.invoke('rename-file', {
        oldPath: oldPath,
        newName: newName
      });

      if (result.success) {
        return result;
      } else {
        throw new Error(result.error);
      }
    } catch (error) {
      console.error('Error renaming file:', error);
      return { success: false, error: error.message };
    }
  }

  /**
   * Begin mapping files to Jellyfin naming convention
   * @param {string} directory - Directory path
   * @param {Array} files - Files to map
   * @param {string|null} tvdbId - TVDB ID
   * @returns {Promise<Object>} Mapping result
   */
  async beginMapping(directory, files, tvdbId) {
    try {
      const result = await ipcRenderer.invoke('begin-mapping', {
        directory: directory,
        files: files,
        tvdbId: tvdbId
      });

      if (result.success) {
        return result;
      } else {
        throw new Error(result.error);
      }
    } catch (error) {
      console.error('Mapping error:', error);
      return { success: false, error: error.message };
    }
  }

  /**
   * Log audit event
   * @param {string} directoryPath - Directory path
   * @param {string} action - Action type
   * @param {Object} details - Event details
   * @returns {Promise<Object>} Audit result
   */
  async logAuditEvent(directoryPath, action, details) {
    try {
      const result = await ipcRenderer.invoke('log-audit-event', {
        directoryPath: directoryPath,
        action: action,
        details: details
      });
      return result;
    } catch (error) {
      console.error('Failed to log audit event:', error);
      return { success: false, error: error.message };
    }
  }

  /**
   * Move file to folder
   * @param {string} filePath - File path
   * @param {string} folderName - Folder name
   * @returns {Promise<Object>} Move result
   */
  async moveFileToFolder(filePath, folderName) {
    try {
      const result = await ipcRenderer.invoke('move-file-to-folder', {
        filePath: filePath,
        folderName: folderName
      });
      return result;
    } catch (error) {
      console.error('Error moving file:', error);
      return { success: false, error: error.message };
    }
  }

  /**
   * Log file info for debugging
   * @param {string} filePath - File path
   * @returns {Promise<Object>} File info result
   */
  async logFileInfo(filePath) {
    try {
      const result = await ipcRenderer.invoke('log-file-info', filePath);
      return result;
    } catch (error) {
      console.error('Error logging file info:', error);
      return { success: false, error: error.message };
    }
  }

  /**
   * Open file in player
   * @param {string} filePath - File path
   */
  openFileInPlayer(filePath) {
    ipcRenderer.invoke('open-file-in-player', filePath);
  }

  /**
   * Collect file data with episode ranges from UI order
   * @param {HTMLElement} fileListEl - File list element
   * @returns {Array} Array of file data objects
   */
  collectFileData(fileListEl) {
    const fileItems = fileListEl.querySelectorAll('.file-item:not(.folder-item)');
    const filesToMap = [];

    fileItems.forEach((item, index) => {
      const fileNameEl = item.querySelector('.file-name');
      const qualityEl = item.querySelector('.file-quality');
      const episodeNumEl = item.querySelector('.episode-number');

      if (fileNameEl && fileNameEl.dataset.filePath) {
        const episodeStart = episodeNumEl ? parseInt(episodeNumEl.dataset.episodeStart || (index + 1)) : (index + 1);
        const episodeEnd = episodeNumEl ? parseInt(episodeNumEl.dataset.episodeEnd || episodeStart) : episodeStart;

        filesToMap.push({
          filePath: fileNameEl.dataset.filePath,
          quality: qualityEl ? qualityEl.textContent : '',
          episodeStart: episodeStart,
          episodeEnd: episodeEnd
        });
      }
    });

    return filesToMap;
  }
}

module.exports = FileManager;