/** 附件类型徽章分类（详情页与发帖编辑共用） */

export type FileKind = "image" | "archive" | "doc" | "media" | "file";

export function fileKind(name: string, mime: string): FileKind {
  const m = (mime || "").toLowerCase();
  const ext = (name.split(".").pop() || "").toLowerCase();
  if (
    m.startsWith("image/") ||
    ["png", "jpg", "jpeg", "gif", "webp", "svg", "bmp", "avif", "ico", "heic"].includes(ext)
  ) {
    return "image";
  }
  if (
    m.includes("zip") ||
    m.includes("rar") ||
    m.includes("7z") ||
    m.includes("compress") ||
    ["zip", "rar", "7z", "tar", "gz", "bz2", "xz", "tgz"].includes(ext)
  ) {
    return "archive";
  }
  if (
    m.startsWith("audio/") ||
    m.startsWith("video/") ||
    ["mp3", "wav", "flac", "aac", "ogg", "mp4", "mkv", "webm", "mov", "avi"].includes(ext)
  ) {
    return "media";
  }
  if (
    m.includes("pdf") ||
    m.includes("word") ||
    m.includes("text") ||
    m.includes("sheet") ||
    m.includes("excel") ||
    ["pdf", "doc", "docx", "txt", "md", "xls", "xlsx", "ppt", "pptx", "csv", "json"].includes(ext)
  ) {
    return "doc";
  }
  return "file";
}

export function fileExtBadge(name: string): string {
  const i = name.lastIndexOf(".");
  if (i <= 0 || i === name.length - 1) return "FILE";
  const ext = name.slice(i + 1).replace(/[^a-zA-Z0-9]/g, "");
  if (!ext || ext.length > 5) return "FILE";
  return ext.toUpperCase();
}