'use client';

/**
 * 자재투입 모달
 * API 연동 완료 (2025-12-26)
 *
 * 기획 화면에 맞춘 레이아웃:
 * - FIFO 순위 설명 (1 최우선, 2 차선, 3+ 대기)
 * - ① 자재 선택 (BOM 기준) 테이블
 * - 취소 / 투입 등록 버튼 (전체 너비)
 */

import { useState, useEffect, useCallback } from 'react';
import { Loader2 } from 'lucide-react';
import { ContentLoadingSpinner } from '@/components/ui/loading-spinner';
import {
  Dialog,
  DialogContent,
  DialogHeader,
  DialogTitle,
} from '@/components/ui/dialog';
import { Button } from '@/components/ui/button';
import { Badge } from '@/components/ui/badge';
import { Checkbox } from '@/components/ui/checkbox';
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from '@/components/ui/table';
import { toast } from 'sonner';
import { isNextRedirectError } from '@/lib/utils/redirect-error';
import { getMaterialsForWorkOrder, registerMaterialInput, type MaterialForInput } from './actions';
import type { WorkOrder } from '../ProductionDashboard/types';
import type { MaterialInput } from './types';

interface MaterialInputModalProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  order: WorkOrder | null;
  onComplete?: () => void;
  isCompletionFlow?: boolean;
  onSaveMaterials?: (orderId: string, materials: MaterialInput[]) => void;
  savedMaterials?: MaterialInput[];
}

export function MaterialInputModal({
  open,
  onOpenChange,
  order,
  onComplete,
  isCompletionFlow = false,
  onSaveMaterials,
}: MaterialInputModalProps) {
  const [selectedMaterials, setSelectedMaterials] = useState<Set<string>>(new Set());
  const [materials, setMaterials] = useState<MaterialForInput[]>([]);
  const [isLoading, setIsLoading] = useState(false);
  const [isSubmitting, setIsSubmitting] = useState(false);

  // API로 자재 목록 로드
  const loadMaterials = useCallback(async () => {
    if (!order) return;

    setIsLoading(true);
    try {
      const result = await getMaterialsForWorkOrder(order.id);
      if (result.success) {
        setMaterials(result.data);
      } else {
        toast.error(result.error || '자재 목록 조회에 실패했습니다.');
      }
    } catch (error) {
      if (isNextRedirectError(error)) throw error;
      console.error('[MaterialInputModal] loadMaterials error:', error);
      toast.error('자재 목록 로드 중 오류가 발생했습니다.');
    } finally {
      setIsLoading(false);
    }
  }, [order]);

  // 모달이 열릴 때 데이터 로드
  useEffect(() => {
    if (open && order) {
      loadMaterials();
    }
  }, [open, order, loadMaterials]);

  const handleToggleMaterial = (materialId: string) => {
    setSelectedMaterials((prev) => {
      const next = new Set(prev);
      if (next.has(materialId)) {
        next.delete(materialId);
      } else {
        next.add(materialId);
      }
      return next;
    });
  };

  // 투입 등록
  const handleSubmit = async () => {
    if (!order) return;

    setIsSubmitting(true);
    try {
      // 선택된 자재 ID 배열
      const materialIds = materials
        .filter((m) => selectedMaterials.has(String(m.id)))
        .map((m) => m.id);

      const result = await registerMaterialInput(order.id, materialIds);

      if (result.success) {
        toast.success('자재 투입이 등록되었습니다.');

        // onSaveMaterials 콜백 호출 (기존 호환성)
        if (onSaveMaterials) {
          const selectedMaterialList: MaterialInput[] = materials
            .filter((m) => selectedMaterials.has(String(m.id)))
            .map((m) => ({
              id: String(m.id),
              materialCode: m.materialCode,
              materialName: m.materialName,
              unit: m.unit,
              currentStock: m.currentStock,
              fifoRank: m.fifoRank,
            }));
          onSaveMaterials(order.id, selectedMaterialList);
        }

        resetAndClose();

        if (isCompletionFlow && onComplete) {
          onComplete();
        }
      } else {
        toast.error(result.error || '자재 투입 등록에 실패했습니다.');
      }
    } catch (error) {
      if (isNextRedirectError(error)) throw error;
      console.error('[MaterialInputModal] handleSubmit error:', error);
      toast.error('자재 투입 등록 중 오류가 발생했습니다.');
    } finally {
      setIsSubmitting(false);
    }
  };

  // 취소
  const handleCancel = () => {
    resetAndClose();
  };

  const resetAndClose = () => {
    setSelectedMaterials(new Set());
    onOpenChange(false);
  };

  if (!order) return null;

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="max-w-2xl p-0 gap-0">
        {/* 헤더 */}
        <DialogHeader className="p-6 pb-4">
          <DialogTitle className="text-xl font-semibold">투입자재 등록</DialogTitle>
        </DialogHeader>

        <div className="px-6 pb-6 space-y-6">
          {/* FIFO 순위 설명 */}
          <div className="flex items-center gap-4 p-4 bg-gray-50 rounded-lg">
            <span className="text-sm font-medium text-gray-700">FIFO 순위:</span>
            <div className="flex items-center gap-4">
              <span className="flex items-center gap-1.5">
                <Badge className="bg-gray-900 hover:bg-gray-900 text-white rounded-full w-6 h-6 flex items-center justify-center p-0 text-xs">
                  1
                </Badge>
                <span className="text-sm text-gray-600">최우선</span>
              </span>
              <span className="flex items-center gap-1.5">
                <Badge className="bg-gray-900 hover:bg-gray-900 text-white rounded-full w-6 h-6 flex items-center justify-center p-0 text-xs">
                  2
                </Badge>
                <span className="text-sm text-gray-600">차선</span>
              </span>
              <span className="flex items-center gap-1.5">
                <Badge className="bg-gray-900 hover:bg-gray-900 text-white rounded-full w-6 h-6 flex items-center justify-center p-0 text-xs">
                  3+
                </Badge>
                <span className="text-sm text-gray-600">대기</span>
              </span>
            </div>
          </div>

          {/* 자재 선택 섹션 */}
          <div>
            <h3 className="text-sm font-medium text-gray-900 mb-3">
              ① 자재 선택 (BOM 기준)
            </h3>

            {isLoading ? (
              <ContentLoadingSpinner text="자재 목록을 불러오는 중..." />
            ) : materials.length === 0 ? (
              <div className="border rounded-lg">
                <Table>
                  <TableHeader>
                    <TableRow className="bg-gray-50">
                      <TableHead className="text-center">자재코드</TableHead>
                      <TableHead className="text-center">자재명</TableHead>
                      <TableHead className="text-center">단위</TableHead>
                      <TableHead className="text-center">현재고</TableHead>
                      <TableHead className="text-center">선택</TableHead>
                    </TableRow>
                  </TableHeader>
                  <TableBody>
                    <TableRow>
                      <TableCell colSpan={5} className="text-center py-12 text-gray-500">
                        이 공정에 배정된 자재가 없습니다.
                      </TableCell>
                    </TableRow>
                  </TableBody>
                </Table>
              </div>
            ) : (
              <div className="border rounded-lg overflow-hidden">
                <Table>
                  <TableHeader>
                    <TableRow className="bg-gray-50">
                      <TableHead className="text-center font-medium">자재코드</TableHead>
                      <TableHead className="text-center font-medium">자재명</TableHead>
                      <TableHead className="text-center font-medium">단위</TableHead>
                      <TableHead className="text-center font-medium">현재고</TableHead>
                      <TableHead className="text-center font-medium">선택</TableHead>
                    </TableRow>
                  </TableHeader>
                  <TableBody>
                    {materials.map((material) => (
                      <TableRow key={material.id}>
                        <TableCell className="text-center font-medium">
                          {material.materialCode}
                        </TableCell>
                        <TableCell className="text-center">{material.materialName}</TableCell>
                        <TableCell className="text-center">{material.unit}</TableCell>
                        <TableCell className="text-center">
                          {material.currentStock.toLocaleString()}
                        </TableCell>
                        <TableCell className="text-center">
                          <Checkbox
                            checked={selectedMaterials.has(String(material.id))}
                            onCheckedChange={() => handleToggleMaterial(String(material.id))}
                          />
                        </TableCell>
                      </TableRow>
                    ))}
                  </TableBody>
                </Table>
              </div>
            )}
          </div>

          {/* 버튼 영역 */}
          <div className="flex gap-3">
            <Button
              variant="outline"
              onClick={handleCancel}
              disabled={isSubmitting}
              className="flex-1 py-6 text-base font-medium"
            >
              취소
            </Button>
            <Button
              onClick={handleSubmit}
              disabled={selectedMaterials.size === 0 || isSubmitting}
              className="flex-1 py-6 text-base font-medium bg-gray-400 hover:bg-gray-500 disabled:bg-gray-300"
            >
              {isSubmitting ? (
                <>
                  <Loader2 className="w-4 h-4 mr-2 animate-spin" />
                  등록 중...
                </>
              ) : (
                '투입 등록'
              )}
            </Button>
          </div>
        </div>
      </DialogContent>
    </Dialog>
  );
}