import {
  disconnectLanguage,
  useFileConnections,
} from "@/store/file-connection";
import { useProjectSourcesStore } from "@/store/sources-store";
import { isTauriEnv } from "@/lib/is-tauri";
import { Tooltip, TooltipContent, TooltipTrigger } from "../ui/tooltip";
import { Button } from "../ui/button";
import { cn } from "@/lib/utils";

type Props = {
  projectId: string;
};

export function HeaderConnectionIndicator({ projectId }: Props) {
  const isTauri = isTauriEnv();

  if (isTauri) {
    return <TauriConnectionIndicator />;
  }

  return <BrowserConnectionIndicator projectId={projectId} />;
}

/** Tauri 模式：展示目前链接的所有语言文件地址 */
function TauriConnectionIndicator() {
  const { languages, baseDir } = useProjectSourcesStore();

  const hasAny = languages.length > 0;
  const allExist = languages.every((lang) => lang.exists);
  const missingCount = languages.filter((lang) => !lang.exists).length;

  // 状态颜色：全部存在=绿色，部分缺失=黄色，无文件=红色
  const statusColor = !hasAny
    ? "bg-red-500"
    : allExist
      ? "bg-green-500"
      : "bg-yellow-500";

  return (
    <Tooltip>
      <TooltipTrigger asChild>
        <Button
          variant="outline"
          title={hasAny ? "已连接文件" : "未配置任何语言文件"}
        >
          <span className={cn("size-2 rounded-full", statusColor)}></span>
          {hasAny
            ? `已连接 ${languages.length}${missingCount > 0 ? ` (${missingCount} 缺失)` : ""}`
            : "未配置"}
        </Button>
      </TooltipTrigger>
      <TooltipContent className="p-4 max-w-md" align="end">
        <div className="text-sm font-medium mb-2">连接状态 (Tauri)</div>
        {languages.length === 0 ? (
          <div className="text-sm text-muted-foreground">
            暂无语言文件配置。请通过项目设置配置语言源目录。
          </div>
        ) : (
          <div className="space-y-2">
            {baseDir && (
              <div className="text-xs text-muted-foreground mb-2 break-all">
                基础目录：{baseDir}
              </div>
            )}
            {languages.map((lang) => (
              <div
                key={lang.language}
                className="flex items-start justify-between gap-2"
              >
                <div className="min-w-0 flex-1">
                  <div className="flex items-center gap-2">
                    <span
                      className={cn(
                        "size-1.5 rounded-full shrink-0",
                        lang.exists ? "bg-green-500" : "bg-red-500"
                      )}
                    />
                    <span className="text-sm font-medium truncate">
                      {lang.language}
                    </span>
                  </div>
                  <div
                    className="text-xs text-muted-foreground truncate ml-3.5"
                    title={lang.path}
                  >
                    {lang.path}
                  </div>
                  {!lang.exists && (
                    <div className="text-xs text-red-500 ml-3.5">
                      文件不存在
                    </div>
                  )}
                </div>
              </div>
            ))}
            <div className="text-xs text-muted-foreground pt-4 mt-4 border-t border-border/30">
              Tauri 模式下文件自动连接，无需手动操作。
            </div>
          </div>
        )}
      </TooltipContent>
    </Tooltip>
  );
}

/** 浏览器模式：使用 FileSystemFileHandle 管理连接 */
function BrowserConnectionIndicator({ projectId }: { projectId: string }) {
  const snap = useFileConnections(projectId);
  const list = Object.values(snap.connections);
  const hasAny = list.length > 0;

  return (
    <Tooltip>
      <TooltipTrigger asChild>
        <Button
          variant="outline"
          title={hasAny ? "已连线文件" : "未连线到任何文件"}
        >
          <span
            className={cn(
              "size-2 rounded-full",
              hasAny ? "bg-green-500" : "bg-red-500"
            )}
          ></span>
          {hasAny ? `已连线 ${list.length}` : "未连线"}
        </Button>
      </TooltipTrigger>
      <TooltipContent className="p-4" align="end">
        <div className="text-sm font-medium mb-2">连线状态</div>
        {list.length === 0 ? (
          <div className="text-sm text-muted-foreground">
            暂无连线。通过"导入 JSON"选择文件后将建立连线。
          </div>
        ) : (
          <div className="space-y-2">
            {list.map((c) => (
              <div
                key={c.language}
                className="flex items-start justify-between gap-2"
              >
                <div className="min-w-0">
                  <div className="text-sm font-medium truncate">
                    {c.language}
                  </div>
                  <div
                    className="text-xs text-muted-foreground truncate"
                    title={c.name}
                  >
                    {c.name}
                  </div>
                </div>
                <button
                  type="button"
                  className="px-2 h-7 rounded border text-xs hover:bg-accent"
                  onClick={() => disconnectLanguage(projectId, c.language)}
                >
                  断开
                </button>
              </div>
            ))}
            <div className="text-xs text-muted-foreground">
              注：出于隐私，浏览器不提供完整路径，仅显示文件名；刷新页面后连线不会自动恢复。
            </div>
          </div>
        )}
      </TooltipContent>
    </Tooltip>
  );
}