// app/[lng]/purchase-requests/page.tsx

import * as React from "react";
import { type SearchParams } from "@/types/table";
import { getValidFilters } from "@/lib/data-table";
import { Shell } from "@/components/shell";
import { DataTableSkeleton } from "@/components/data-table/data-table-skeleton";
import { Button } from "@/components/ui/button";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Plus, FileText, Clock, CheckCircle, XCircle, Send } from "lucide-react";
import Link from "next/link";
import { searchParamsPurchaseRequestCache } from "@/lib/itb/validations";
import { getAllPurchaseRequests, getPurchaseRequestStats } from "@/lib/itb/service";
import { PurchaseRequestsTable } from "@/lib/itb/table/purchase-requests-table";
import { useTranslation } from "@/i18n"

interface PurchaseRequestsPageProps {
  params: Promise<{ lng: string }>;
  searchParams: Promise<SearchParams>;
}

export default async function PurchaseRequestsPage(props: PurchaseRequestsPageProps) {
  const { lng } = await props.params
  const { t } = await useTranslation(lng, 'menu')
  
  const searchParams = await props.searchParams;
  
  // Parse search params
  const search = searchParamsPurchaseRequestCache.parse(searchParams);
  const validFilters = getValidFilters(search.filters);
  
  // Load data
  const promises = Promise.all([
    getAllPurchaseRequests({
      ...search,
      filters: validFilters,
    }),
    getPurchaseRequestStats(),
  ]);

  return (
    <Shell className="gap-4">
      <div className="flex items-center justify-between">
        <div>
          <h2 className="text-2xl font-bold tracking-tight">
            {t('menu.engineering_management.itb')}
          </h2>
          <p className="text-muted-foreground">
            {t('menu.engineering_management.itb_desc')}
          </p>
        </div>
      </div>

      {/* 통계 카드 */}
      <React.Suspense
        fallback={
          <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-6">
            {[...Array(6)].map((_, i) => (
              <Card key={i}>
                <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
                  <CardTitle className="text-sm font-medium">
                    <div className="h-4 w-20 bg-muted animate-pulse rounded" />
                  </CardTitle>
                </CardHeader>
                <CardContent>
                  <div className="h-8 w-12 bg-muted animate-pulse rounded" />
                </CardContent>
              </Card>
            ))}
          </div>
        }
      >
        <PurchaseRequestStats promises={promises} />
      </React.Suspense>
      
      <React.Suspense
        fallback={
          <DataTableSkeleton
            columnCount={13}
            searchableColumnCount={1}
            filterableColumnCount={3}
            cellWidths={[
              "8rem",   // requestCode
              "15rem",  // requestTitle
              "12rem",  // projectCode
              "15rem",  // projectName
              "10rem",  // packageNo
              "8rem",   // status
              "10rem",  // engPicName
              "10rem",  // purchasePicName
              "10rem",  // estimatedBudget
              "10rem",  // requestedDeliveryDate
              "8rem",   // itemCount
              "10rem",  // createdAt
              "8rem",   // actions
            ]}
            shrinkZero
          />
        }
      >
        <PurchaseRequestsTable promises={promises} />
      </React.Suspense>
    </Shell>
  );
}

// 통계 컴포넌트
async function PurchaseRequestStats({ 
  promises 
}: { 
  promises: Promise<[any, any]> 
}) {
  const [, stats] = await promises;

  const statCards = [
    {
      title: "전체",
      value: stats?.total || 0,
      icon: FileText,
      color: "text-blue-500",
    },
    {
      title: "작성중",
      value: stats?.draft || 0,
      icon: Clock,
      color: "text-gray-500",
    },
 
    {
      title: "RFQ 생성",
      value: stats?.rfqCreated || 0,
      icon: Send,
      color: "text-red-500",
    },
  ];

  return (
    <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
      {statCards.map((card, index) => {
        const Icon = card.icon;
        return (
          <Card key={index}>
            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
              <CardTitle className="text-sm font-medium">
                {card.title}
              </CardTitle>
              <Icon className={`h-4 w-4 ${card.color}`} />
            </CardHeader>
            <CardContent>
              <div className="text-2xl font-bold">{card.value}</div>
            </CardContent>
          </Card>
        );
      })}
    </div>
  );
}

// Metadata
export const metadata = {
  title: "Purchase Request Management",
  description: "Create and manage material purchase requests for projects",
};