"use client";

// 구매관리 > 품의서관리 — wace salesMng/proposalMngList.jsp 1:1
// 그리드: sales_request_master(doc_type='PROPOSAL') + mbom 품번/품명
// 검색: 품의서No / 프로젝트번호 / 결재상태 / 작성일 / 구매유형(multi) / 작성자 / 제품구분
// 액션: 조회 / 결재상신 / 발주서생성

import React, { useCallback, useEffect, useMemo, useState } from "react";
import { Input } from "@/components/ui/input";
import { Button } from "@/components/ui/button";
import { Send, ClipboardCheck } from "lucide-react";
import { toast } from "sonner";
import { DataGrid, DataGridColumn } from "@/components/common/DataGrid";
import { SmartSelect, SmartSelectOption } from "@/components/common/SmartSelect";
import { CompactFilterBar, CompactFilterField, CompactDateRange } from "@/components/common/CompactFilterBar";
import { PageHeader } from "@/components/common/PageHeader";
import { apiClient } from "@/lib/api/client";
import { purchaseApi, PurchaseListFilter, OptionItem } from "@/lib/api/purchase";
import { exportToExcel } from "@/lib/utils/excelExport";

const PARENT_PURCHASE_TYPE = "0001814"; // 구매유형 comm_code
const PARENT_PART_TYPE     = "0000001"; // 제품구분 comm_code

const STATUS_OPTS: SmartSelectOption[] = [
  { code: "create",           label: "작성중" },
  { code: "approvalRequest",  label: "결재중" },
  { code: "approvalComplete", label: "결재완료" },
  { code: "reject",           label: "반려" },
];

const EMPTY_FILTER: PurchaseListFilter = {
  proposal_no: "", project_no: "", search_status: "",
  regdate_start: "", regdate_end: "",
  purchase_type: "", writer: "", part_type: "",
  page: 1, page_size: 50,
};

export default function ProposalPage() {
  const [rows, setRows] = useState<any[]>([]);
  const [total, setTotal] = useState(0);
  const [loading, setLoading] = useState(false);
  const [filter, setFilter] = useState<PurchaseListFilter>(EMPTY_FILTER);
  const [checkedIds, setCheckedIds] = useState<string[]>([]);

  const [purchaseTypeOpts, setPurchaseTypeOpts] = useState<SmartSelectOption[]>([]);
  const [partTypeOpts, setPartTypeOpts] = useState<SmartSelectOption[]>([]);
  const [userOpts, setUserOpts] = useState<OptionItem[]>([]);

  const fetchList = useCallback(async (override?: Partial<PurchaseListFilter>) => {
    setLoading(true);
    try {
      const f = { ...filter, ...override };
      const res = await purchaseApi.listProposal(f);
      setRows(res.rows ?? []);
      setTotal(res.totalCount ?? 0);
    } catch (e: any) {
      toast.error(e?.response?.data?.message ?? e?.message ?? "조회 실패");
    } finally {
      setLoading(false);
    }
  }, [filter]);

  useEffect(() => {
    let dead = false;
    (async () => {
      try {
        const [pt, ptt, u] = await Promise.all([
          apiClient.get(`/sales/codes/${PARENT_PURCHASE_TYPE}`),
          apiClient.get(`/sales/codes/${PARENT_PART_TYPE}`),
          purchaseApi.listUsers(),
        ]);
        if (dead) return;
        setPurchaseTypeOpts(pt.data?.data ?? []);
        setPartTypeOpts(ptt.data?.data ?? []);
        setUserOpts(u);
      } catch { /* skip */ }
    })();
    fetchList(EMPTY_FILTER);
    return () => { dead = true; };
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);

  const gridRows = useMemo(() => rows.map((r, i) => ({
    ...r,
    id: r.objid ?? `p_${i}`,
    part_display: r.part_extra_count > 0 ? `${r.part_no} 외 ${r.part_extra_count}건` : r.part_no,
    part_name_display: r.part_extra_count > 0 ? `${r.part_name} 외 ${r.part_extra_count}건` : r.part_name,
  })), [rows]);

  const GRID_COLUMNS: DataGridColumn[] = useMemo(() => ([
    { key: "proposal_no",        label: "품의서 No",   width: "w-[140px]", align: "center" },
    { key: "project_number",     label: "프로젝트번호", width: "w-[150px]", align: "center" },
    { key: "purchase_type_name", label: "구매유형",     width: "w-[115px]", align: "center" },
    { key: "order_type_name",    label: "주문유형",     width: "w-[115px]", align: "center" },
    { key: "product_name_title", label: "제품구분",     width: "w-[115px]", align: "center" },
    { key: "part_display",       label: "품번",         width: "w-[160px]" },
    { key: "part_name_display",  label: "품명",         minWidth: "min-w-[280px]" },
    { key: "status_title",       label: "결재상태",     width: "w-[115px]", align: "center" },
    { key: "regdate_title",      label: "작성일",       width: "w-[115px]", align: "center" },
    { key: "writer_name",        label: "작성자",       width: "w-[115px]", align: "center" },
  ]), []);

  const summary = useMemo(() => {
    const approved = gridRows.filter((r: any) => r.status === "approvalComplete").length;
    return [
      { label: "전체 건수", value: total.toLocaleString(), suffix: "건" },
      { label: "결재완료(페이지)", value: approved.toLocaleString(), suffix: "건" },
      { label: "선택", value: checkedIds.length.toLocaleString(), suffix: "건" },
    ];
  }, [gridRows, total, checkedIds]);

  const handleSearch = () => { setFilter(f => ({ ...f, page: 1 })); fetchList({ page: 1 }); };
  const handleReset  = () => { setFilter(EMPTY_FILTER); fetchList(EMPTY_FILTER); };

  return (
    <div className="flex h-full flex-col overflow-hidden p-2 gap-2">
      <PageHeader
        loading={loading} onSearch={handleSearch} onReset={handleReset}
        actions={<>
          <Button size="sm" variant="outline" className="h-8 gap-1 px-2 text-xs"
                  disabled={checkedIds.length !== 1}
                  onClick={() => toast.info("결재상신 — Amaranth10 SSO 연동 후 활성")}>
            <Send className="h-3.5 w-3.5" /> 결재상신
          </Button>
          <Button size="sm" variant="default" className="h-8 gap-1 px-2 text-xs"
                  disabled={checkedIds.length !== 1}
                  onClick={() => toast.info("발주서생성 — purchase_order_part 신설 후 활성")}>
            <ClipboardCheck className="h-3.5 w-3.5" /> 발주서생성
          </Button>
        </>}
      />
      <CompactFilterBar totalText={<>총 {total.toLocaleString()}건</>}>
        <CompactFilterField label="품의서 No" width={150}>
          <Input value={filter.proposal_no ?? ""}
                 onChange={(e) => setFilter({ ...filter, proposal_no: e.target.value })} />
        </CompactFilterField>
        <CompactFilterField label="프로젝트번호" width={170}>
          <Input value={filter.project_no ?? ""}
                 onChange={(e) => setFilter({ ...filter, project_no: e.target.value })} />
        </CompactFilterField>
        <CompactFilterField label="결재상태" width={130}>
          <SmartSelect options={STATUS_OPTS} value={filter.search_status ?? ""}
                       onValueChange={(v) => setFilter({ ...filter, search_status: v })} />
        </CompactFilterField>
        <CompactFilterField label="작성일" width={280}>
          <CompactDateRange
            from={filter.regdate_start ?? ""} setFrom={(v) => setFilter({ ...filter, regdate_start: v })}
            to={filter.regdate_end ?? ""}     setTo={(v) => setFilter({ ...filter, regdate_end: v })}
          />
        </CompactFilterField>
        <CompactFilterField label="구매유형" width={130}>
          <SmartSelect options={purchaseTypeOpts} value={filter.purchase_type ?? ""}
                       onValueChange={(v) => setFilter({ ...filter, purchase_type: v })} />
        </CompactFilterField>
        <CompactFilterField label="작성자" width={150}>
          <SmartSelect options={userOpts} value={filter.writer ?? ""}
                       onValueChange={(v) => setFilter({ ...filter, writer: v })} />
        </CompactFilterField>
        <CompactFilterField label="제품구분" width={130}>
          <SmartSelect options={partTypeOpts} value={filter.part_type ?? ""}
                       onValueChange={(v) => setFilter({ ...filter, part_type: v })} />
        </CompactFilterField>
      </CompactFilterBar>

      <DataGrid
        columns={GRID_COLUMNS}
        data={gridRows}
        loading={loading}
        showCheckbox
        checkedIds={checkedIds}
        onCheckedChange={setCheckedIds}
        emptyMessage={loading ? "조회 중..." : "데이터가 없습니다"}
        gridId="purchase-proposal"
        pageSizeOptions={[10, 15, 20, 50, 100]}
        paginationStyle="range"
        serverPaging
        serverPage={filter.page ?? 1}
        serverPageSize={filter.page_size ?? 50}
        serverTotalItems={total}
        onPageChange={(p) => { setFilter(f => ({ ...f, page: p })); fetchList({ page: p }); }}
        onPageSizeChange={(n) => { setFilter(f => ({ ...f, page: 1, page_size: n })); fetchList({ page: 1, page_size: n }); }}
        showColumnSettings
        summaryStats={summary}
        systemColumnKeys={["writer_name", "regdate_title"]}
        onRefresh={() => fetchList()}
        onDownload={() => {
          if (gridRows.length === 0) { toast.info("내보낼 데이터가 없습니다."); return; }
          const exportRows = gridRows.map((r: any) => {
            const out: Record<string, any> = {};
            GRID_COLUMNS.forEach((c) => { out[c.label] = r[c.key] ?? ""; });
            return out;
          });
          exportToExcel(exportRows, "품의서관리.xlsx", "품의서");
        }}
        showChart
      />
    </div>
  );
}
