/*
 * Copyright © 2026 Qiantong Technology Co., Ltd.
 * qModel Model Platform(Open Source Edition)
 *  *
 * License:
 * Released under the Apache License, Version 2.0.
 * You may use, modify, and distribute this software for commercial purposes
 * under the terms of the License.
 *  *
 * Special Notice:
 * All derivative versions are strictly prohibited from modifying or removing
 * the default system logo and copyright information.
 * For brand customization, please apply for brand customization authorization via official channels.
 *  *
 * More information: https://qmodel.qiantong.tech/business.html
 *  *
 * ============================================================================
 *  *
 * 版权所有 © 2026 江苏千桐科技有限公司
 * qModel 模型平台（开源版）
 *  *
 * 许可协议：
 * 本项目基于 Apache License 2.0 开源协议发布，
 * 允许在遵守协议的前提下进行商用、修改和分发。
 *  *
 * 特别说明：
 * 所有衍生版本不得修改或移除系统默认的 LOGO 和版权信息；
 * 如需定制品牌，请通过官方渠道申请品牌定制授权。
 *  *
 * 更多信息请访问：https://qmodel.qiantong.tech/business.html
 */

/**
* v-copyText 复制文本内容
* Copyright (c) 2022 ruoyi
*/

export default {
  beforeMount(el, { value, arg }) {
    if (arg === "callback") {
      el.$copyCallback = value;
    } else {
      el.$copyValue = value;
      const handler = () => {
        copyTextToClipboard(el.$copyValue);
        if (el.$copyCallback) {
          el.$copyCallback(el.$copyValue);
        }
      };
      el.addEventListener("click", handler);
      el.$destroyCopy = () => el.removeEventListener("click", handler);
    }
  }
}

function copyTextToClipboard(input, { target = document.body } = {}) {
  const element = document.createElement('textarea');
  const previouslyFocusedElement = document.activeElement;

  element.value = input;

  // Prevent keyboard from showing on mobile
  element.setAttribute('readonly', '');

  element.style.contain = 'strict';
  element.style.position = 'absolute';
  element.style.left = '-9999px';
  element.style.fontSize = '12pt'; // Prevent zooming on iOS

  const selection = document.getSelection();
  const originalRange = selection.rangeCount > 0 && selection.getRangeAt(0);

  target.append(element);
  element.select();

  // Explicit selection workaround for iOS
  element.selectionStart = 0;
  element.selectionEnd = input.length;

  let isSuccess = false;
  try {
    isSuccess = document.execCommand('copy');
  } catch { }

  element.remove();

  if (originalRange) {
    selection.removeAllRanges();
    selection.addRange(originalRange);
  }

  // Get the focus back on the previously focused element, if any
  if (previouslyFocusedElement) {
    previouslyFocusedElement.focus();
  }

  return isSuccess;
}
