"use client";

import { ServerCrash, Home, RefreshCw } from "lucide-react";
import Link from "next/link";

import { useErrorStore, ERROR_COLORS } from "@/stores/error-store";
import { Button } from "@/components/ui/button";
import { cn } from "@/lib/utils";

/**
 * 服务器错误 (500) 全屏错误页面组件
 * 当 API 返回 500 错误时显示
 * 消息："服务器暂时不可用，请稍后重试"
 * 包含 "返回首页" 按钮
 */
export function ServerError(): React.ReactElement | null {
  const { isServerError, serverErrorMessage, clearServerError } = useErrorStore();

  const handleRetry = (): void => {
    clearServerError();
    // 刷新页面尝试重新加载
    if (typeof window !== "undefined") {
      window.location.reload();
    }
  };

  // 没有服务器错误时不显示
  if (!isServerError) {
    return null;
  }

  return (
    <div className="fixed inset-0 z-[100] flex items-center justify-center bg-background p-4">
      <div className="flex w-full max-w-md flex-col items-center text-center">
        {/* 错误图标 */}
        <div
          className="mb-6 flex size-20 items-center justify-center rounded-full"
          style={{ backgroundColor: `${ERROR_COLORS.error}15` }}
        >
          <ServerCrash
            className="size-10"
            style={{ color: ERROR_COLORS.error }}
            aria-hidden
          />
        </div>

        {/* 错误标题 */}
        <h1
          className="mb-2 text-2xl font-bold"
          style={{ color: ERROR_COLORS.error }}
        >
          服务器错误
        </h1>

        {/* 错误消息 */}
        <p className="mb-8 text-base text-muted-foreground">
          {serverErrorMessage}
        </p>

        {/* 操作按钮 */}
        <div className="flex flex-col gap-3 sm:flex-row">
          <Button
            onClick={handleRetry}
            variant="outline"
            className={cn(
              "gap-2 border-current hover:bg-current/5",
            )}
            style={{ borderColor: ERROR_COLORS.error, color: ERROR_COLORS.error }}
          >
            <RefreshCw className="size-4" />
            重试
          </Button>

          <Link
            href="/hall"
            className="inline-flex items-center justify-center gap-2 rounded-lg px-4 py-2 text-sm font-medium text-white"
            style={{ backgroundColor: ERROR_COLORS.error }}
          >
            <Home className="size-4" />
            返回首页
          </Link>
        </div>

        {/* 状态码提示 */}
        <p className="mt-8 text-xs text-muted-foreground/60">
          错误代码: 500 Internal Server Error
        </p>
      </div>
    </div>
  );
}

/**
 * 服务器错误弹窗/遮罩组件（适用于在现有页面中显示）
 */
export function ServerErrorModal(): React.ReactElement | null {
  const { isServerError, serverErrorMessage, clearServerError } = useErrorStore();

  const handleRetry = (): void => {
    clearServerError();
    window.location.reload();
  };

  if (!isServerError) {
    return null;
  }

  return (
    <div className="fixed inset-0 z-[100] flex items-center justify-center bg-black/50 p-4 backdrop-blur-sm">
      <div className="w-full max-w-sm rounded-xl bg-card p-6 shadow-lg">
        <div className="flex flex-col items-center text-center">
          {/* 错误图标 */}
          <div
            className="mb-4 flex size-16 items-center justify-center rounded-full"
            style={{ backgroundColor: `${ERROR_COLORS.error}15` }}
          >
            <ServerCrash
              className="size-8"
              style={{ color: ERROR_COLORS.error }}
            />
          </div>

          {/* 错误消息 */}
          <h2 className="mb-2 text-lg font-semibold text-foreground">
            服务器暂时不可用
          </h2>
          <p className="mb-6 text-sm text-muted-foreground">
            {serverErrorMessage}
          </p>

          {/* 按钮 */}
          <div className="flex w-full gap-3">
            <Button
              variant="outline"
              className="flex-1"
              onClick={handleRetry}
            >
              <RefreshCw className="mr-2 size-4" />
              重试
            </Button>
            <Link
              href="/hall"
              className="flex flex-1 items-center justify-center gap-2 rounded-lg px-4 py-2 text-sm font-medium text-white"
              style={{ backgroundColor: ERROR_COLORS.error }}
            >
              <Home className="size-4" />
              返回首页
            </Link>
          </div>
        </div>
      </div>
    </div>
  );
}