/**
 * 견적 금액 요약 패널
 *
 * - 개소별 합계 (왼쪽) - 클릭하여 상세 확인
 * - 상세별 합계 (오른쪽) - 선택 개소의 카테고리별 금액 및 품목 상세
 * - 스크롤 가능한 상세 영역
 */

"use client";

import { useMemo } from "react";
import { Coins } from "lucide-react";

import { Card, CardContent, CardHeader, CardTitle } from "../ui/card";

import type { LocationItem } from "./QuoteRegistrationV2";

// =============================================================================
// 목데이터 - 상세별 합계 (공정별 + 품목 상세)
// =============================================================================

interface DetailItem {
  name: string;
  quantity: number;
  unitPrice: number;
  totalPrice: number;
}

interface DetailCategory {
  label: string;
  count: number;
  amount: number;
  items: DetailItem[];
}

const MOCK_DETAIL_TOTALS: DetailCategory[] = [
  {
    label: "본체 (스크린/슬랫)",
    count: 1,
    amount: 1061676,
    items: [
      { name: "실리카 스크린", quantity: 1, unitPrice: 1061676, totalPrice: 1061676 },
    ]
  },
  {
    label: "절곡품 - 가이드레일",
    count: 2,
    amount: 116556,
    items: [
      { name: "벽면형 마감재", quantity: 2, unitPrice: 42024, totalPrice: 84048 },
      { name: "본체 가이드 레일", quantity: 2, unitPrice: 16254, totalPrice: 32508 },
    ]
  },
  {
    label: "절곡품 - 케이스",
    count: 1,
    amount: 30348,
    items: [
      { name: "전면부 케이스", quantity: 1, unitPrice: 30348, totalPrice: 30348 },
    ]
  },
  {
    label: "절곡품 - 하단마감재",
    count: 1,
    amount: 15420,
    items: [
      { name: "하단 하우징", quantity: 1, unitPrice: 15420, totalPrice: 15420 },
    ]
  },
  {
    label: "모터 & 제어기",
    count: 2,
    amount: 400000,
    items: [
      { name: "직류 모터", quantity: 1, unitPrice: 250000, totalPrice: 250000 },
      { name: "제어기", quantity: 1, unitPrice: 150000, totalPrice: 150000 },
    ]
  },
  {
    label: "부자재",
    count: 2,
    amount: 21200,
    items: [
      { name: "각파이프 25mm", quantity: 2, unitPrice: 8500, totalPrice: 17000 },
      { name: "플랫바 20mm", quantity: 1, unitPrice: 4200, totalPrice: 4200 },
    ]
  },
];

// =============================================================================
// Props
// =============================================================================

interface QuoteSummaryPanelProps {
  locations: LocationItem[];
  selectedLocationId: string | null;
  onSelectLocation: (id: string) => void;
}

// =============================================================================
// 컴포넌트
// =============================================================================

export function QuoteSummaryPanel({
  locations,
  selectedLocationId,
  onSelectLocation,
}: QuoteSummaryPanelProps) {
  // ---------------------------------------------------------------------------
  // 계산된 값
  // ---------------------------------------------------------------------------

  // 선택된 개소
  const selectedLocation = useMemo(() => {
    return locations.find((loc) => loc.id === selectedLocationId) || null;
  }, [locations, selectedLocationId]);

  // 총 금액
  const totalAmount = useMemo(() => {
    return locations.reduce((sum, loc) => sum + (loc.totalPrice || 0), 0);
  }, [locations]);

  // 개소별 합계
  const locationTotals = useMemo(() => {
    return locations.map((loc) => ({
      id: loc.id,
      label: `${loc.floor} / ${loc.code}`,
      productCode: loc.productCode,
      quantity: loc.quantity,
      unitPrice: loc.unitPrice || 0,
      totalPrice: loc.totalPrice || 0,
    }));
  }, [locations]);

  // 선택 개소의 상세별 합계 (공정별) - 목데이터 포함
  const detailTotals = useMemo((): DetailCategory[] => {
    // bomResult가 없으면 목데이터 사용
    if (!selectedLocation?.bomResult?.subtotals) {
      return selectedLocation ? MOCK_DETAIL_TOTALS : [];
    }

    const subtotals = selectedLocation.bomResult.subtotals;
    const groupedItems = selectedLocation.bomResult.grouped_items;
    const result: DetailCategory[] = [];

    Object.entries(subtotals).forEach(([key, value]) => {
      if (typeof value === "object" && value !== null) {
        // grouped_items에서 items 가져오기 (subtotals에는 items가 없을 수 있음)
        const groupItemsRaw = groupedItems?.[key]?.items || value.items || [];
        // DetailItem 형식으로 변환
        const groupItems: DetailItem[] = (groupItemsRaw as Array<{
          item_name?: string;
          name?: string;
          quantity?: number;
          unit_price?: number;
          total_price?: number;
        }>).map((item) => ({
          name: item.item_name || item.name || "",
          quantity: item.quantity || 0,
          unitPrice: item.unit_price || 0,
          totalPrice: item.total_price || 0,
        }));
        result.push({
          label: value.name || key,
          count: value.count || 0,
          amount: value.subtotal || 0,
          items: groupItems,
        });
      } else if (typeof value === "number") {
        result.push({
          label: key,
          count: 0,
          amount: value,
          items: [],
        });
      }
    });

    return result;
  }, [selectedLocation]);

  // ---------------------------------------------------------------------------
  // 렌더링
  // ---------------------------------------------------------------------------

  return (
    <Card className="border-gray-200">
      <CardHeader className="pb-3 bg-gradient-to-r from-blue-50 to-indigo-50 border-b border-blue-200">
        <CardTitle className="text-base font-semibold flex items-center gap-2">
          <Coins className="h-5 w-5 text-blue-600" />
          견적 금액 요약
        </CardTitle>
      </CardHeader>
      <CardContent className="p-0">
        {/* 좌우 분할 */}
        <div className="grid grid-cols-1 lg:grid-cols-2 divide-y lg:divide-y-0 lg:divide-x divide-gray-200">
          {/* 왼쪽: 개소별 합계 */}
          <div className="p-4">
            <div className="flex items-center gap-2 mb-3">
              <span className="text-blue-500">📍</span>
              <h4 className="font-semibold text-gray-700">개소별 합계</h4>
            </div>

            {locations.length === 0 ? (
              <div className="text-center text-gray-500 py-6">
                <p className="text-sm">개소를 추가해주세요</p>
              </div>
            ) : (
              <div className="space-y-2 max-h-[300px] overflow-y-auto pr-2">
                {locationTotals.map((loc) => (
                  <div
                    key={loc.id}
                    className={`flex items-center justify-between p-3 rounded-lg cursor-pointer transition-colors ${
                      selectedLocationId === loc.id
                        ? "bg-blue-100 border border-blue-300"
                        : "bg-gray-50 hover:bg-gray-100 border border-transparent"
                    }`}
                    onClick={() => onSelectLocation(loc.id)}
                  >
                    <div>
                      <p className="font-medium">{loc.label}</p>
                      <p className="text-xs text-gray-500">
                        {loc.productCode} × {loc.quantity}
                      </p>
                    </div>
                    <div className="text-right">
                      <p className="text-xs text-gray-500">상세소계</p>
                      <p className="font-bold text-blue-600">
                        {loc.totalPrice.toLocaleString()}
                      </p>
                      {loc.unitPrice > 0 && (
                        <p className="text-xs text-gray-400">
                          수량 적용: {(loc.unitPrice * loc.quantity).toLocaleString()}
                        </p>
                      )}
                    </div>
                  </div>
                ))}
              </div>
            )}
          </div>

          {/* 오른쪽: 상세별 합계 */}
          <div className="p-4">
            <div className="flex items-center gap-2 mb-3">
              <span className="text-blue-500">✨</span>
              <h4 className="font-semibold text-gray-700">
                상세별 합계
                {selectedLocation && (
                  <span className="text-sm font-normal text-gray-500 ml-2">
                    ({selectedLocation.floor} / {selectedLocation.code})
                  </span>
                )}
              </h4>
            </div>

            {!selectedLocation ? (
              <div className="text-center text-gray-500 py-6">
                <p className="text-sm">개소를 선택해주세요</p>
              </div>
            ) : detailTotals.length === 0 ? (
              <div className="text-center text-gray-500 py-6">
                <p className="text-sm">견적 산출 후 상세 금액이 표시됩니다</p>
              </div>
            ) : (
              <div className="space-y-3 max-h-[300px] overflow-y-auto pr-2">
                {detailTotals.map((category, index) => (
                  <div key={index} className="bg-blue-50 rounded-lg overflow-hidden border border-blue-200">
                    {/* 카테고리 헤더 */}
                    <div className="flex items-center justify-between px-3 py-2 bg-blue-100/50">
                      <span className="font-semibold text-gray-700">{category.label}</span>
                      <div className="flex items-center gap-2">
                        <span className="text-xs text-gray-500">({category.count}개)</span>
                        <span className="font-bold text-blue-600">
                          {category.amount.toLocaleString()}
                        </span>
                      </div>
                    </div>
                    {/* 품목 상세 목록 */}
                    <div className="divide-y divide-blue-100">
                      {category.items.map((item, itemIndex) => (
                        <div key={itemIndex} className="flex items-center justify-between px-3 py-2 bg-white">
                          <div>
                            <span className="text-sm text-gray-700">{item.name}</span>
                            <p className="text-xs text-gray-400">
                              수량: {item.quantity} × 단가: {item.unitPrice.toLocaleString()}
                            </p>
                          </div>
                          <span className="text-sm font-medium text-blue-600">
                            {item.totalPrice.toLocaleString()}
                          </span>
                        </div>
                      ))}
                    </div>
                  </div>
                ))}
              </div>
            )}
          </div>
        </div>

        {/* 하단 바: 총 개소 수, 예상 견적금액, 견적 상태 */}
        <div className="bg-gray-900 text-white px-6 py-5 flex items-center justify-between">
          <div className="flex items-center gap-10">
            <div>
              <p className="text-sm text-gray-400">총 개소 수</p>
              <p className="text-4xl font-bold">{locations.length}</p>
            </div>
            <div>
              <p className="text-sm text-gray-400">예상 견적금액</p>
              <p className="text-4xl font-bold text-blue-400">
                {totalAmount.toLocaleString()}
                <span className="text-xl ml-1">원</span>
              </p>
            </div>
          </div>
          <div className="text-right">
            <p className="text-sm text-gray-400">견적 상태</p>
            <span className="inline-block bg-blue-500/20 text-blue-300 border border-blue-500/50 text-lg px-4 py-1 rounded">
              작성중
            </span>
          </div>
        </div>
      </CardContent>
    </Card>
  );
}