import * as React from "react";
import { Skeleton } from "@/components/ui/skeleton";
import { Shell } from "@/components/shell";
import { ErrorBoundary } from "@/components/error-boundary";
import { getDashboardData } from "@/lib/dashboard/service";
import { DashboardClient } from "@/lib/dashboard/dashboard-client";

// 데이터 fetch 시 비동기 함수 호출 후 await 하므로 static-pre-render 과정에서 dynamic-server-error 발생.
// 따라서, dynamic 속성을 force-dynamic 으로 설정하여 동적 렌더링 처리
// getDashboardData 함수에 대한 Promise를 넘기는 식으로 수정하게 되면 force-dynamic 선언을 제거해도 됨.
export const dynamic = 'force-dynamic'

export default async function IndexPage() {
  // domain을 명시적으로 전달
  const domain = "engineering";
  
  try {
    // 서버에서 직접 데이터 fetch
    const dashboardData = await getDashboardData(domain);
    
    return (
      <Shell className="gap-2">
        <DashboardClient initialData={dashboardData} />
      </Shell>
    );
  } catch (error) {
    console.error("Dashboard data fetch error:", error);
    return (
      <Shell className="gap-2">
        <div className="flex items-center justify-center py-12">
          <div className="text-center space-y-2">
            <p className="text-destructive">데이터를 불러오는데 실패했습니다.</p>
            <p className="text-muted-foreground text-sm">{error instanceof Error ? error.message : "알 수 없는 오류가 발생했습니다."}</p>
          </div>
        </div>
      </Shell>
    );
  }
}

function DashboardSkeleton() {
  return (
    <div className="space-y-6">
      {/* 헤더 스켈레톤 */}
      <div className="flex items-center justify-between">
        <div className="space-y-2">
          <Skeleton className="h-8 w-48" />
          <Skeleton className="h-4 w-72" />
        </div>
        <Skeleton className="h-10 w-24" />
      </div>

      {/* 요약 카드 스켈레톤 */}
      <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4">
        {[...Array(4)].map((_, i) => (
          <div key={i} className="space-y-3 p-6 border rounded-lg">
            <div className="flex items-center justify-between">
              <Skeleton className="h-4 w-16" />
              <Skeleton className="h-4 w-4" />
            </div>
            <Skeleton className="h-8 w-12" />
            <Skeleton className="h-3 w-20" />
          </div>
        ))}
      </div>

      {/* 차트 스켈레톤 */}
      <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
        {[...Array(2)].map((_, i) => (
          <div key={i} className="space-y-4 p-6 border rounded-lg">
            <div className="space-y-2">
              <Skeleton className="h-6 w-32" />
              <Skeleton className="h-4 w-48" />
            </div>
            <Skeleton className="h-[300px] w-full" />
          </div>
        ))}
      </div>

      {/* 탭 스켈레톤 */}
      <div className="space-y-4">
        <Skeleton className="h-10 w-64" />
        <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
          {[...Array(6)].map((_, i) => (
            <div key={i} className="space-y-4 p-6 border rounded-lg">
              <Skeleton className="h-6 w-32" />
              <div className="space-y-3">
                <div className="flex justify-between">
                  <Skeleton className="h-4 w-16" />
                  <Skeleton className="h-4 w-12" />
                </div>
                <div className="flex gap-2">
                  <Skeleton className="h-6 w-16" />
                  <Skeleton className="h-6 w-16" />
                  <Skeleton className="h-6 w-16" />
                </div>
                <Skeleton className="h-2 w-full" />
              </div>
            </div>
          ))}
        </div>
      </div>
    </div>
  );
}