"use client";

/**
 * V2Input 설정 패널
 * 토스식 단계별 UX: 기본 설정 -> 타입별 설정 -> 고급 설정(접힘)
 */

import React, { useState, useEffect } from "react";
import { Label } from "@/components/ui/label";
import { Input } from "@/components/ui/input";
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
import { Switch } from "@/components/ui/switch";
import { Collapsible, CollapsibleContent, CollapsibleTrigger } from "@/components/ui/collapsible";
import { Settings, ChevronDown, Loader2, Type, Hash, Lock, AlignLeft, SlidersHorizontal, Palette, ListOrdered } from "lucide-react";
import { cn } from "@/lib/utils";
import { AutoGenerationType, AutoGenerationConfig } from "@/types/screen";
import { AutoGenerationUtils } from "@/lib/utils/autoGeneration";
import { getAvailableNumberingRules } from "@/lib/api/numberingRule";
import { NumberingRuleConfig } from "@/types/numbering-rule";

interface V2InputConfigPanelProps {
  config: Record<string, any>;
  onChange: (config: Record<string, any>) => void;
  menuObjid?: number;
}

export const V2InputConfigPanel: React.FC<V2InputConfigPanelProps> = ({ config, onChange, menuObjid }) => {
  const [numberingRules, setNumberingRules] = useState<NumberingRuleConfig[]>([]);
  const [loadingRules, setLoadingRules] = useState(false);
  const [parentMenus, setParentMenus] = useState<any[]>([]);
  const [loadingMenus, setLoadingMenus] = useState(false);
  const [selectedMenuObjid, setSelectedMenuObjid] = useState<number | undefined>(() => {
    return config.autoGeneration?.selectedMenuObjid || menuObjid;
  });
  const [advancedOpen, setAdvancedOpen] = useState(false);

  const updateConfig = (field: string, value: any) => {
    onChange({ ...config, [field]: value });
  };

  useEffect(() => {
    const loadMenus = async () => {
      setLoadingMenus(true);
      try {
        const { apiClient } = await import("@/lib/api/client");
        const response = await apiClient.get("/admin/menus");
        if (response.data.success && response.data.data) {
          const allMenus = response.data.data;
          const level2UserMenus = allMenus.filter((menu: any) =>
            menu.menu_type === '1' && menu.lev === 2
          );
          setParentMenus(level2UserMenus);
        }
      } catch (error) {
        console.error("부모 메뉴 로드 실패:", error);
      } finally {
        setLoadingMenus(false);
      }
    };
    loadMenus();
  }, []);

  useEffect(() => {
    const loadRules = async () => {
      if (config.autoGeneration?.type !== "numbering_rule") return;
      if (!selectedMenuObjid) { setNumberingRules([]); return; }
      setLoadingRules(true);
      try {
        const response = await getAvailableNumberingRules(selectedMenuObjid);
        if (response.success && response.data) {
          setNumberingRules(response.data);
        }
      } catch (error) {
        console.error("채번 규칙 목록 로드 실패:", error);
        setNumberingRules([]);
      } finally {
        setLoadingRules(false);
      }
    };
    loadRules();
  }, [selectedMenuObjid, config.autoGeneration?.type]);

  const inputType = config.inputType || config.type || "text";

  return (
    <div className="space-y-4">
      {/* ─── 1단계: 입력 타입 선택 (카드 방식) ─── */}
      <div className="space-y-2">
        <div className="flex items-center gap-2">
          <Type className="h-4 w-4 text-muted-foreground" />
          <p className="text-sm font-medium">입력 타입</p>
        </div>
        <p className="text-[11px] text-muted-foreground">입력 필드의 종류를 선택해요</p>
      </div>

      <div className="grid grid-cols-2 gap-2">
        {[
          { value: "text", icon: Type, label: "텍스트", desc: "일반 텍스트 입력" },
          { value: "number", icon: Hash, label: "숫자", desc: "숫자만 입력" },
          { value: "password", icon: Lock, label: "비밀번호", desc: "마스킹 처리" },
          { value: "textarea", icon: AlignLeft, label: "여러 줄", desc: "긴 텍스트 입력" },
          { value: "slider", icon: SlidersHorizontal, label: "슬라이더", desc: "범위 선택" },
          { value: "color", icon: Palette, label: "색상", desc: "색상 선택기" },
          { value: "numbering", icon: ListOrdered, label: "채번", desc: "자동 번호 생성" },
        ].map((item) => (
          <button
            key={item.value}
            type="button"
            onClick={() => updateConfig("inputType", item.value)}
            className={cn(
              "flex items-center gap-2 rounded-lg border p-2.5 text-left transition-all",
              inputType === item.value
                ? "border-primary bg-primary/5 ring-1 ring-primary/20"
                : "border-border hover:border-primary/30 hover:bg-muted/30"
            )}
          >
            <item.icon className={cn(
              "h-4 w-4 shrink-0",
              inputType === item.value ? "text-primary" : "text-muted-foreground"
            )} />
            <div className="min-w-0">
              <span className={cn(
                "text-xs font-medium block",
                inputType === item.value ? "text-primary" : "text-foreground"
              )}>{item.label}</span>
              <span className="text-[10px] text-muted-foreground block truncate">{item.desc}</span>
            </div>
          </button>
        ))}
      </div>

      {/* ─── 채번 타입 전용 안내 ─── */}
      {inputType === "numbering" && (
        <div className="rounded-lg border bg-muted/30 p-4 space-y-3">
          <div className="rounded-md border border-primary/20 bg-primary/5 p-3">
            <p className="text-xs text-primary">
              채번 규칙은 <strong>테이블 관리</strong>에서 컬럼별로 설정돼요.
              화면에 배치된 컬럼의 채번 규칙이 자동으로 적용돼요.
            </p>
          </div>
          <div className="flex items-center justify-between py-1">
            <div>
              <p className="text-sm">읽기전용</p>
              <p className="text-[11px] text-muted-foreground">채번 필드는 자동 생성되므로 읽기전용을 권장해요</p>
            </div>
            <Switch
              checked={config.readonly !== false}
              onCheckedChange={(checked) => updateConfig("readonly", checked)}
            />
          </div>
        </div>
      )}

      {/* ─── 채번 타입이 아닌 경우: 기본 설정 ─── */}
      {inputType !== "numbering" && (
        <>
          {/* 기본 설정 영역 */}
          <div className="rounded-lg border bg-muted/30 p-4 space-y-3">
            {/* 안내 텍스트 (placeholder) */}
            <div className="flex items-center justify-between py-1">
              <span className="text-xs text-muted-foreground">안내 텍스트</span>
              <Input
                value={config.placeholder || ""}
                onChange={(e) => updateConfig("placeholder", e.target.value)}
                placeholder="입력 안내"
                className="h-7 w-[160px] text-xs"
              />
            </div>

            {/* 입력 형식 - 텍스트 타입 전용 */}
            {(inputType === "text" || !config.inputType) && (
              <div className="flex items-center justify-between py-1">
                <span className="text-xs text-muted-foreground">입력 형식</span>
                <Select value={config.format || "none"} onValueChange={(value) => updateConfig("format", value)}>
                  <SelectTrigger className="h-7 w-[160px] text-xs">
                    <SelectValue placeholder="형식 선택" />
                  </SelectTrigger>
                  <SelectContent>
                    <SelectItem value="none">제한 없음</SelectItem>
                    <SelectItem value="email">이메일</SelectItem>
                    <SelectItem value="tel">전화번호</SelectItem>
                    <SelectItem value="url">URL</SelectItem>
                    <SelectItem value="currency">통화</SelectItem>
                    <SelectItem value="biz_no">사업자번호</SelectItem>
                  </SelectContent>
                </Select>
              </div>
            )}

            {/* 입력 마스크 */}
            <div className="flex items-center justify-between py-1">
              <div>
                <span className="text-xs text-muted-foreground">입력 마스크</span>
                <p className="text-[10px] text-muted-foreground mt-0.5"># = 숫자, A = 문자, * = 모두</p>
              </div>
              <Input
                value={config.mask || ""}
                onChange={(e) => updateConfig("mask", e.target.value)}
                placeholder="###-####-####"
                className="h-7 w-[160px] text-xs"
              />
            </div>

            {/* 숫자/슬라이더: 범위 설정 */}
            {(inputType === "number" || inputType === "slider") && (
              <div className="space-y-2 pt-1">
                <p className="text-xs text-muted-foreground">값 범위</p>
                <div className="flex gap-2">
                  <div className="flex-1">
                    <Label className="text-[10px] text-muted-foreground">최소값</Label>
                    <Input
                      type="number"
                      value={config.min ?? ""}
                      onChange={(e) => updateConfig("min", e.target.value ? Number(e.target.value) : undefined)}
                      placeholder="0"
                      className="h-7 text-xs"
                    />
                  </div>
                  <div className="flex-1">
                    <Label className="text-[10px] text-muted-foreground">최대값</Label>
                    <Input
                      type="number"
                      value={config.max ?? ""}
                      onChange={(e) => updateConfig("max", e.target.value ? Number(e.target.value) : undefined)}
                      placeholder="100"
                      className="h-7 text-xs"
                    />
                  </div>
                  <div className="flex-1">
                    <Label className="text-[10px] text-muted-foreground">단계</Label>
                    <Input
                      type="number"
                      value={config.step ?? ""}
                      onChange={(e) => updateConfig("step", e.target.value ? Number(e.target.value) : undefined)}
                      placeholder="1"
                      className="h-7 text-xs"
                    />
                  </div>
                </div>
              </div>
            )}

            {/* 여러 줄 텍스트: 줄 수 */}
            {inputType === "textarea" && (
              <div className="flex items-center justify-between py-1">
                <span className="text-xs text-muted-foreground">줄 수</span>
                <Input
                  type="number"
                  value={config.rows || 3}
                  onChange={(e) => updateConfig("rows", parseInt(e.target.value) || 3)}
                  min={2}
                  max={20}
                  className="h-7 w-[160px] text-xs"
                />
              </div>
            )}
          </div>

          {/* ─── 고급 설정: 자동 생성 (Collapsible) ─── */}
          <Collapsible open={advancedOpen} onOpenChange={setAdvancedOpen}>
            <CollapsibleTrigger asChild>
              <button
                type="button"
                className="flex w-full items-center justify-between rounded-lg border bg-muted/30 px-4 py-2.5 text-left transition-colors hover:bg-muted/50"
              >
                <div className="flex items-center gap-2">
                  <Settings className="h-4 w-4 text-muted-foreground" />
                  <span className="text-sm font-medium">고급 설정</span>
                </div>
                <ChevronDown
                  className={cn(
                    "h-4 w-4 text-muted-foreground transition-transform duration-200",
                    advancedOpen && "rotate-180"
                  )}
                />
              </button>
            </CollapsibleTrigger>
            <CollapsibleContent>
              <div className="rounded-b-lg border border-t-0 p-4 space-y-3">
                {/* 자동 생성 토글 */}
                <div className="flex items-center justify-between py-1">
                  <div>
                    <p className="text-sm">자동 생성</p>
                    <p className="text-[11px] text-muted-foreground">값이 자동으로 채워져요</p>
                  </div>
                  <Switch
                    checked={config.autoGeneration?.enabled || false}
                    onCheckedChange={(checked) => {
                      const currentConfig = config.autoGeneration || { type: "none", enabled: false };
                      updateConfig("autoGeneration", {
                        ...currentConfig,
                        enabled: checked as boolean,
                      });
                    }}
                  />
                </div>

                {config.autoGeneration?.enabled && (
                  <div className="space-y-3 ml-1 border-l-2 border-primary/20 pl-3">
                    {/* 자동 생성 타입 */}
                    <div>
                      <p className="mb-1.5 text-xs text-muted-foreground">생성 방식</p>
                      <Select
                        value={config.autoGeneration?.type || "none"}
                        onValueChange={(value: AutoGenerationType) => {
                          const currentConfig = config.autoGeneration || { type: "none", enabled: false };
                          updateConfig("autoGeneration", {
                            ...currentConfig,
                            type: value,
                          });
                        }}
                      >
                        <SelectTrigger className="h-8 text-sm">
                          <SelectValue placeholder="자동생성 타입 선택" />
                        </SelectTrigger>
                        <SelectContent>
                          <SelectItem value="none">자동생성 없음</SelectItem>
                          <SelectItem value="uuid">UUID 생성</SelectItem>
                          <SelectItem value="current_user">현재 사용자 ID</SelectItem>
                          <SelectItem value="current_time">현재 시간</SelectItem>
                          <SelectItem value="sequence">순차 번호</SelectItem>
                          <SelectItem value="numbering_rule">채번 규칙</SelectItem>
                          <SelectItem value="random_string">랜덤 문자열</SelectItem>
                          <SelectItem value="random_number">랜덤 숫자</SelectItem>
                          <SelectItem value="company_code">회사 코드</SelectItem>
                          <SelectItem value="department">부서 코드</SelectItem>
                        </SelectContent>
                      </Select>
                    </div>

                    {config.autoGeneration?.type && config.autoGeneration.type !== "none" && (
                      <p className="text-[11px] text-muted-foreground">
                        {AutoGenerationUtils.getTypeDescription(config.autoGeneration.type)}
                      </p>
                    )}

                    {/* 채번 규칙 선택 */}
                    {config.autoGeneration?.type === "numbering_rule" && (
                      <div className="space-y-3">
                        <div>
                          <p className="mb-1.5 text-xs text-muted-foreground">
                            대상 메뉴 <span className="text-destructive">*</span>
                          </p>
                          <Select
                            value={selectedMenuObjid?.toString() || ""}
                            onValueChange={(value) => {
                              const menuId = parseInt(value);
                              setSelectedMenuObjid(menuId);
                              updateConfig("autoGeneration", {
                                ...config.autoGeneration,
                                selectedMenuObjid: menuId,
                              });
                            }}
                            disabled={loadingMenus}
                          >
                            <SelectTrigger className="h-8 text-sm">
                              <SelectValue placeholder={loadingMenus ? "로딩 중..." : "메뉴 선택"} />
                            </SelectTrigger>
                            <SelectContent>
                              {parentMenus.length === 0 ? (
                                <SelectItem value="no-menus" disabled>
                                  사용 가능한 메뉴가 없습니다
                                </SelectItem>
                              ) : (
                                parentMenus.map((menu) => (
                                  <SelectItem key={menu.objid} value={menu.objid.toString()}>
                                    {menu.menu_name_kor}
                                  </SelectItem>
                                ))
                              )}
                            </SelectContent>
                          </Select>
                        </div>

                        {selectedMenuObjid ? (
                          <div>
                            <p className="mb-1.5 text-xs text-muted-foreground">
                              채번 규칙 <span className="text-destructive">*</span>
                            </p>
                            {loadingRules ? (
                              <div className="flex items-center gap-2 text-xs text-muted-foreground">
                                <Loader2 className="h-3 w-3 animate-spin" />
                                규칙 로딩 중...
                              </div>
                            ) : (
                              <Select
                                value={config.autoGeneration?.options?.numberingRuleId || ""}
                                onValueChange={(value) => {
                                  updateConfig("autoGeneration", {
                                    ...config.autoGeneration,
                                    options: {
                                      ...config.autoGeneration?.options,
                                      numberingRuleId: value,
                                    },
                                  });
                                }}
                              >
                                <SelectTrigger className="h-8 text-sm">
                                  <SelectValue placeholder="규칙 선택" />
                                </SelectTrigger>
                                <SelectContent>
                                  {numberingRules.length === 0 ? (
                                    <SelectItem value="no-rules" disabled>
                                      사용 가능한 규칙이 없습니다
                                    </SelectItem>
                                  ) : (
                                    numberingRules.map((rule) => (
                                      <SelectItem key={rule.ruleId} value={rule.ruleId}>
                                        {rule.ruleName}
                                      </SelectItem>
                                    ))
                                  )}
                                </SelectContent>
                              </Select>
                            )}
                          </div>
                        ) : (
                          <div className="rounded-md border border-amber-200 bg-amber-50 p-2.5 text-xs text-amber-800">
                            먼저 대상 메뉴를 선택하세요
                          </div>
                        )}
                      </div>
                    )}

                    {/* 랜덤/순차 옵션 */}
                    {config.autoGeneration?.type &&
                      ["random_string", "random_number", "sequence"].includes(config.autoGeneration.type) && (
                        <div className="space-y-3">
                          {["random_string", "random_number"].includes(config.autoGeneration.type) && (
                            <div className="flex items-center justify-between py-1">
                              <span className="text-xs text-muted-foreground">길이</span>
                              <Input
                                type="number"
                                min="1"
                                max="50"
                                value={config.autoGeneration?.options?.length || 8}
                                onChange={(e) => {
                                  updateConfig("autoGeneration", {
                                    ...config.autoGeneration,
                                    options: {
                                      ...config.autoGeneration?.options,
                                      length: parseInt(e.target.value) || 8,
                                    },
                                  });
                                }}
                                className="h-7 w-[120px] text-xs"
                              />
                            </div>
                          )}

                          <div className="flex items-center justify-between py-1">
                            <span className="text-xs text-muted-foreground">접두사</span>
                            <Input
                              value={config.autoGeneration?.options?.prefix || ""}
                              onChange={(e) => {
                                updateConfig("autoGeneration", {
                                  ...config.autoGeneration,
                                  options: {
                                    ...config.autoGeneration?.options,
                                    prefix: e.target.value,
                                  },
                                });
                              }}
                              placeholder="예: INV-"
                              className="h-7 w-[120px] text-xs"
                            />
                          </div>

                          <div className="flex items-center justify-between py-1">
                            <span className="text-xs text-muted-foreground">접미사</span>
                            <Input
                              value={config.autoGeneration?.options?.suffix || ""}
                              onChange={(e) => {
                                updateConfig("autoGeneration", {
                                  ...config.autoGeneration,
                                  options: {
                                    ...config.autoGeneration?.options,
                                    suffix: e.target.value,
                                  },
                                });
                              }}
                              className="h-7 w-[120px] text-xs"
                            />
                          </div>

                          <div>
                            <span className="text-xs text-muted-foreground">미리보기</span>
                            <div className="mt-1 rounded-md border bg-muted p-2 text-xs font-mono">
                              {AutoGenerationUtils.generatePreviewValue(config.autoGeneration)}
                            </div>
                          </div>
                        </div>
                      )}
                  </div>
                )}
              </div>
            </CollapsibleContent>
          </Collapsible>
        </>
      )}
    </div>
  );
};

V2InputConfigPanel.displayName = "V2InputConfigPanel";

export default V2InputConfigPanel;