// utils.js - Utility functions

export const Utils = {
  /**
   * Get or create a unique machine ID stored in localStorage
   * @returns {string} Machine ID
   */
  getMachineId() {
    let machineId = localStorage.getItem('MachineId');

    if (!machineId) {
      machineId = 'dev-' + crypto.randomUUID();
      localStorage.setItem('MachineId', machineId);
    }

    return machineId;
  },

  /**
   * Generate a unique session ID
   * @returns {string} Session ID
   */
  generateSessionId() {
    return 'session-' + crypto.randomUUID();
  },

  /**
   * Generate a unique conversation ID
   * @returns {string} Conversation ID
   */
  generateConversationId() {
    return 'conversation-' + crypto.randomUUID();
  },

  /**
   * Remove a file from a file input element
   * @param {HTMLInputElement} fileInput - The file input element
   * @param {File} fileToRemove - The file to remove
   */
  removeFileFromInput(fileInput, fileToRemove) {
    // File inputs are read-only. We have to update them
    // by assigning a new value instead of filtering out
    // directly files we do not want anymore.
    const dt = new DataTransfer();
    const { files } = fileInput;

    for (let i = 0; i < files.length; i++) {
      const file = files[i];
      if (file !== fileToRemove) {
        dt.items.add(file);
      }
    }

    fileInput.files = dt.files;
  }
};