"use client";

// 개발관리 E-BOM 트리 다이얼로그 — wace setStructurePopupMainFS 1:1 (단일 다이얼로그로 통합)
//
// 운영판은 frameset(헤더/좌측 트리/우측 디테일/하단 버튼) 4-Frame 팝업이지만 RPS 는 단일
// 다이얼로그에 헤더(BOM Report 메타) + 동적 LEVEL 컬럼 트리 그리드 + 엑셀 다운로드 버튼.
//
// 컬럼 (운영 structureAscendingListExcel.jsp 1:1):
//   동적 L1..LMaxLevel ("*" 표시) + 품번 / 품명 / 수량 / 항목수량 / 3D / 2D / PDF /
//   재료 / 열처리경도 / 열처리방법 / 표면처리 / 메이커 / 범주 이름 / 비고

import React, { useEffect, useMemo, useState } from "react";
import {
  Dialog, DialogContent, DialogHeader, DialogTitle, DialogFooter,
} from "@/components/ui/dialog";
import { Button } from "@/components/ui/button";
import { Loader2, FileSpreadsheet, Folder } from "lucide-react";
import { toast } from "sonner";
import { devBomApi, BomReportRow, BomTreeFullRow } from "@/lib/api/devBom";
import { cn } from "@/lib/utils";

interface Props {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  bomReport: BomReportRow | null;  // 헤더 정보 표시용
}

export function BomReportTreeDialog({ open, onOpenChange, bomReport }: Props) {
  const [rows, setRows] = useState<BomTreeFullRow[]>([]);
  const [maxLevel, setMaxLevel] = useState(0);
  const [loading, setLoading] = useState(false);
  const [exporting, setExporting] = useState(false);

  useEffect(() => {
    if (!open || !bomReport?.objid) {
      setRows([]); setMaxLevel(0);
      return;
    }
    let alive = true;
    setLoading(true);
    devBomApi.treeFull({ bom_report_objid: bomReport.objid })
      .then((data) => {
        if (!alive) return;
        setRows(data.rows ?? []);
        setMaxLevel(Number(data.max_level) || 0);
      })
      .catch((e: any) => {
        toast.error(e?.response?.data?.message ?? e?.message ?? "트리 조회 실패");
      })
      .finally(() => { if (alive) setLoading(false); });
    return () => { alive = false; };
  }, [open, bomReport?.objid]);

  const handleExcel = async () => {
    if (!bomReport?.objid) return;
    setExporting(true);
    try {
      const { blob, fileName } = await devBomApi.excelAscending({ bom_report_objid: bomReport.objid });
      const url = URL.createObjectURL(blob);
      const a = document.createElement("a");
      a.href = url; a.download = fileName;
      document.body.appendChild(a); a.click(); a.remove();
      URL.revokeObjectURL(url);
      toast.success(`${fileName} 다운로드`);
    } catch (e: any) {
      toast.error(e?.response?.data?.message ?? e?.message ?? "엑셀 다운로드 실패");
    } finally {
      setExporting(false);
    }
  };

  const effectiveMax = Math.max(1, maxLevel);

  // 동적 LEVEL 컬럼 헤더 (1..maxLevel)
  const levelHeaders = useMemo(() => {
    const h: number[] = [];
    for (let i = 1; i <= effectiveMax; i++) h.push(i);
    return h;
  }, [effectiveMax]);

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="max-w-[1500px] w-[97vw] max-h-[92vh] flex flex-col p-0 overflow-hidden">
        <DialogHeader className="bg-blue-600 px-4 py-3">
          <DialogTitle className="text-white">BOM 구조 조회</DialogTitle>
        </DialogHeader>

        {/* 헤더 메타 */}
        {bomReport && (
          <div className="grid grid-cols-4 gap-x-6 gap-y-1.5 border-b px-4 py-3 text-xs">
            <MetaRow label="제품구분" value={bomReport.product_name ?? bomReport.product_cd} />
            <MetaRow label="품번"     value={bomReport.part_no} />
            <MetaRow label="품명"     value={bomReport.part_name} />
            <MetaRow label="Version"  value={bomReport.revision} />
            <MetaRow label="상태"     value={bomReport.status_title} />
            <MetaRow label="등록자"   value={bomReport.dept_user_name} />
            <MetaRow label="등록일"   value={bomReport.reg_date} />
            <MetaRow label="확정일"   value={bomReport.deploy_date} />
          </div>
        )}

        <div className="flex items-center justify-between border-b px-4 py-2">
          <div className="text-xs text-muted-foreground">
            총 {rows.length.toLocaleString()}행 · MAX_LEVEL = {maxLevel}
          </div>
          <Button size="sm" variant="outline" onClick={handleExcel} disabled={exporting || rows.length === 0}>
            {exporting ? <Loader2 className="h-4 w-4 animate-spin" /> : <FileSpreadsheet className="h-4 w-4" />}
            <span className="ml-1">엑셀 다운로드</span>
          </Button>
        </div>

        <div className="flex-1 min-h-0 overflow-auto">
          {loading ? (
            <div className="flex h-64 items-center justify-center">
              <Loader2 className="h-6 w-6 animate-spin" />
            </div>
          ) : (
            <table className="text-xs border-collapse w-max min-w-full">
              <thead className="bg-yellow-100 dark:bg-yellow-900/30 sticky top-0">
                <tr>
                  {levelHeaders.map((i) => (
                    <th key={`l${i}`} className="border px-2 py-1 w-[36px] text-center font-bold">{i}</th>
                  ))}
                  <th className="border px-2 py-1 min-w-[150px] text-left">품번</th>
                  <th className="border px-2 py-1 min-w-[180px] text-left">품명</th>
                  <th className="border px-2 py-1 min-w-[60px] text-right">수량</th>
                  <th className="border px-2 py-1 min-w-[70px] text-right">항목수량</th>
                  <th className="border px-2 py-1 min-w-[40px] text-center">3D</th>
                  <th className="border px-2 py-1 min-w-[40px] text-center">2D</th>
                  <th className="border px-2 py-1 min-w-[40px] text-center">PDF</th>
                  <th className="border px-2 py-1 min-w-[100px] text-left">재료</th>
                  <th className="border px-2 py-1 min-w-[100px] text-left">열처리경도</th>
                  <th className="border px-2 py-1 min-w-[100px] text-left">열처리방법</th>
                  <th className="border px-2 py-1 min-w-[100px] text-left">표면처리</th>
                  <th className="border px-2 py-1 min-w-[110px] text-left">메이커</th>
                  <th className="border px-2 py-1 min-w-[100px] text-center">범주 이름</th>
                  <th className="border px-2 py-1 min-w-[130px] text-left">비고</th>
                </tr>
              </thead>
              <tbody>
                {rows.length === 0 && (
                  <tr>
                    <td colSpan={levelHeaders.length + 14} className="py-8 text-center text-muted-foreground">
                      BOM 구조가 없습니다.
                    </td>
                  </tr>
                )}
                {rows.map((r, idx) => {
                  const lev = Number(r.lev ?? 1);
                  return (
                    <tr key={idx} className="hover:bg-muted/30">
                      {levelHeaders.map((i) => (
                        <td key={`lc${i}`} className={cn("border px-1 py-0.5 text-center", i === lev && "font-bold")}>
                          {i === lev ? "*" : ""}
                        </td>
                      ))}
                      <td className="border px-2 py-0.5 whitespace-nowrap">{r.pm_part_no}</td>
                      <td className="border px-2 py-0.5">{r.pm_part_name}</td>
                      <td className="border px-2 py-0.5 text-right">{r.qty}</td>
                      <td className="border px-2 py-0.5 text-right">{r.p_qty}</td>
                      <td className="border px-2 py-0.5 text-center"><FolderCell n={r.cu01_cnt} /></td>
                      <td className="border px-2 py-0.5 text-center"><FolderCell n={r.cu02_cnt} /></td>
                      <td className="border px-2 py-0.5 text-center"><FolderCell n={r.cu03_cnt} /></td>
                      <td className="border px-2 py-0.5">{r.material}</td>
                      <td className="border px-2 py-0.5">{r.heat_treatment_hardness}</td>
                      <td className="border px-2 py-0.5">{r.heat_treatment_method}</td>
                      <td className="border px-2 py-0.5">{r.surface_treatment}</td>
                      <td className="border px-2 py-0.5">{r.maker}</td>
                      <td className="border px-2 py-0.5 text-center">{r.part_type_title}</td>
                      <td className="border px-2 py-0.5">{r.remark}</td>
                    </tr>
                  );
                })}
              </tbody>
            </table>
          )}
        </div>

        <DialogFooter className="border-t bg-muted/20 px-4 py-3 sm:justify-center">
          <Button variant="outline" onClick={() => onOpenChange(false)}>닫기</Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  );
}

function FolderCell({ n }: { n: any }) {
  const has = Number(n ?? 0) > 0;
  return (
    <span className="inline-flex items-center justify-center">
      <Folder className={cn("w-4 h-4",
        has ? "fill-[#1a73e8] text-[#1a73e8]" : "fill-white text-muted-foreground/40")} />
    </span>
  );
}

function MetaRow({ label, value }: { label: string; value: any }) {
  return (
    <div className="flex items-baseline gap-2">
      <span className="text-muted-foreground w-[60px] shrink-0">{label}</span>
      <span className="font-medium">{value != null && value !== "" ? value : "—"}</span>
    </div>
  );
}