export interface ClipboardPayload {
  files: File[];
  text: string;
}

/** 读取剪贴板(需要用户手势与权限)。失败或被拒绝返回 null */
export async function readClipboard(): Promise<ClipboardPayload | null> {
  try {
    if (!navigator.clipboard.read) return { files: [], text: await navigator.clipboard.readText() };
    const files: File[] = [];
    let text = '';
    for (const entry of await navigator.clipboard.read()) {
      for (const type of entry.types) {
        const blob = await entry.getType(type);
        if (type.startsWith('image/')) {
          files.push(new File([blob], `粘贴-${Date.now()}.${type.split('/')[1] ?? 'png'}`, { type }));
        } else if (type === 'text/plain' && !text) {
          text = await blob.text();
        }
      }
    }
    return { files, text };
  } catch {
    return null;
  }
}