"use client";

import { useEffect, useMemo, useState } from "react";
import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogFooter } from "@/components/ui/dialog";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { screenApi, tableTypeApi } from "@/lib/api/screen";
import { ScreenDefinition } from "@/types/screen";
import { useAuth } from "@/hooks/useAuth";

interface CreateScreenModalProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  onCreated?: (screen: ScreenDefinition) => void;
}

export default function CreateScreenModal({ open, onOpenChange, onCreated }: CreateScreenModalProps) {
  const { user } = useAuth();

  const [screenName, setScreenName] = useState("");
  const [screenCode, setScreenCode] = useState("");
  const [tableName, setTableName] = useState("");
  const [description, setDescription] = useState("");
  const [tables, setTables] = useState<Array<{ tableName: string; displayName: string }>>([]);
  const [submitting, setSubmitting] = useState(false);
  // 화면 코드 자동 생성
  const generateCode = async () => {
    try {
      const companyCode = (user as any)?.company_code || (user as any)?.companyCode || "*";
      const generatedCode = await screenApi.generateScreenCode(companyCode);
      setScreenCode(generatedCode);
    } catch (e) {
      console.error("화면 코드 생성 실패", e);
    }
  };

  useEffect(() => {
    if (!open) return;
    let abort = false;
    const loadTables = async () => {
      try {
        const list = await tableTypeApi.getTables();
        if (abort) return;
        setTables(list.map((t) => ({ tableName: t.tableName, displayName: t.displayName || t.tableName })));
      } catch (e) {
        console.error("테이블 목록 조회 실패", e);
        setTables([]);
      }
    };
    loadTables();
    return () => {
      abort = true;
    };
  }, [open]);

  // 모달이 열릴 때 자동으로 화면 코드 생성
  useEffect(() => {
    if (open && !screenCode) {
      generateCode();
    }
  }, [open, screenCode]);

  const isValid = useMemo(() => {
    return screenName.trim().length > 0 && screenCode.trim().length > 0 && tableName.trim().length > 0;
  }, [screenName, screenCode, tableName]);

  const handleSubmit = async () => {
    if (!isValid || submitting) return;
    try {
      setSubmitting(true);
      const companyCode = (user as any)?.company_code || (user as any)?.companyCode || "*";
      const created = await screenApi.createScreen({
        screenName: screenName.trim(),
        screenCode: screenCode.trim(),
        tableName: tableName.trim(),
        companyCode,
        description: description.trim() || undefined,
        createdBy: (user as any)?.userId,
      } as any);

      // 날짜 필드 보정
      const mapped: ScreenDefinition = {
        ...created,
        createdDate: created.createdDate ? new Date(created.createdDate as any) : new Date(),
        updatedDate: created.updatedDate ? new Date(created.updatedDate as any) : new Date(),
      } as ScreenDefinition;

      onCreated?.(mapped);
      onOpenChange(false);
      setScreenName("");
      setScreenCode("");
      setTableName("");
      setDescription("");
    } catch (e) {
      console.error("화면 생성 실패", e);
      // 필요 시 토스트 추가 가능
    } finally {
      setSubmitting(false);
    }
  };

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="sm:max-w-lg">
        <DialogHeader>
          <DialogTitle>새 화면 생성</DialogTitle>
        </DialogHeader>

        <div className="space-y-4">
          <div className="space-y-2">
            <Label htmlFor="screenName">화면명</Label>
            <Input id="screenName" value={screenName} onChange={(e) => setScreenName(e.target.value)} />
          </div>
          <div className="space-y-2">
            <Label htmlFor="screenCode">화면 코드</Label>
            <Input
              id="screenCode"
              value={screenCode}
              readOnly
              placeholder="자동 생성됩니다..."
              className="cursor-not-allowed bg-gray-50"
            />
          </div>
          <div className="space-y-2">
            <Label htmlFor="tableName">테이블</Label>
            <select
              id="tableName"
              className="w-full rounded-md border px-3 py-2 text-sm"
              value={tableName}
              onChange={(e) => setTableName(e.target.value)}
            >
              <option value="">테이블 선택...</option>
              {tables.map((t) => (
                <option key={t.tableName} value={t.tableName}>
                  {t.displayName} ({t.tableName})
                </option>
              ))}
            </select>
          </div>
          <div className="space-y-2">
            <Label htmlFor="description">설명</Label>
            <Input id="description" value={description} onChange={(e) => setDescription(e.target.value)} />
          </div>
        </div>

        <DialogFooter className="mt-4">
          <Button variant="outline" onClick={() => onOpenChange(false)} disabled={submitting}>
            취소
          </Button>
          <Button onClick={handleSubmit} disabled={!isValid || submitting} className="bg-blue-600 hover:bg-blue-700">
            생성
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  );
}