import { Message } from "@arco-design/web-vue";

/**
 * 复制文本到剪切板
 * @param text 复制内容
 * @returns 是否复制成功
 */
export function copyText(text: string) {
  if (navigator.clipboard && window.isSecureContext) {
    // 现代浏览器和安全环境下，直接用 Clipboard API
    return navigator.clipboard
      .writeText(text)
      .then(() => {
        Message.success("复制成功");
      })
      .catch((err) => {
        Message.error("复制失败：" + err);
      });
  } else {
    // 退回到传统方式
    fallbackCopyText(text);
  }
}

/**
 * 复制文本到剪切板的传统方式
 * @param text 复制内容
 */
function fallbackCopyText(text: string) {
  const textArea = document.createElement("textarea");
  textArea.value = text;

  // 避免滚动到页面底部
  textArea.style.position = "fixed";
  textArea.style.top = "0";
  textArea.style.left = "0";

  document.body.appendChild(textArea);
  textArea.focus();
  textArea.select();

  try {
    const successful = document.execCommand("copy");
    if (successful) {
      console.log("复制成功（fallback）");
    } else {
      console.log("复制失败（fallback）");
    }
  } catch (err) {
    console.error("复制失败（fallback）", err);
  }

  document.body.removeChild(textArea);
}
export function formatFileSizeToString(size: number): string {
  if (size < 0) return "0 B";

  const units = ["B", "KB", "MB", "GB", "TB"];
  let sizeD = size;
  let unitIndex = 0;

  while (sizeD >= 1024 && unitIndex < units.length - 1) {
    sizeD /= 1024;
    unitIndex++;
  }

  let formatted: string;
  if (sizeD < 10) {
    formatted = sizeD.toFixed(2);
  } else if (sizeD < 100) {
    formatted = sizeD.toFixed(1);
  } else {
    formatted = sizeD.toFixed(0);
  }

  return `${formatted} ${units[unitIndex]}`;
}