"use client";

/**
 * V2Group 설정 패널
 * 토스식 단계별 UX: 그룹 타입 카드 선택 -> 타입별 설정 -> 고급 설정(접힘)
 */

import React, { useState } from "react";
import { Input } from "@/components/ui/input";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import { Switch } from "@/components/ui/switch";
import { Button } from "@/components/ui/button";
import {
  Collapsible,
  CollapsibleContent,
  CollapsibleTrigger,
} from "@/components/ui/collapsible";
import {
  LayoutList,
  Rows3,
  ChevronsDownUp,
  SquareStack,
  AppWindow,
  FileInput,
  Settings,
  ChevronDown,
  Plus,
  Trash2,
} from "lucide-react";
import { cn } from "@/lib/utils";

// ─── 그룹 타입 카드 정의 ───
const GROUP_TYPE_CARDS = [
  {
    value: "section",
    icon: LayoutList,
    title: "섹션",
    description: "기본 영역 구분이에요",
  },
  {
    value: "tabs",
    icon: Rows3,
    title: "탭",
    description: "탭으로 내용을 나눠요",
  },
  {
    value: "accordion",
    icon: ChevronsDownUp,
    title: "아코디언",
    description: "접었다 펼 수 있어요",
  },
  {
    value: "card",
    icon: SquareStack,
    title: "카드 섹션",
    description: "카드 형태로 묶어요",
  },
  {
    value: "modal",
    icon: AppWindow,
    title: "모달",
    description: "팝업으로 표시해요",
  },
  {
    value: "form-modal",
    icon: FileInput,
    title: "폼 모달",
    description: "입력 폼 팝업이에요",
  },
] as const;

interface V2GroupConfigPanelProps {
  config: Record<string, any>;
  onChange: (config: Record<string, any>) => void;
}

export const V2GroupConfigPanel: React.FC<V2GroupConfigPanelProps> = ({
  config,
  onChange,
}) => {
  const [advancedOpen, setAdvancedOpen] = useState(false);

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

  const currentGroupType = config.groupType || config.type || "section";
  const isSectionType = currentGroupType === "section" || currentGroupType === "accordion";
  const isModalType = currentGroupType === "modal" || currentGroupType === "form-modal";
  const isTabsType = currentGroupType === "tabs";

  const tabs = config.tabs || [];

  const addTab = () => {
    const newTabs = [...tabs, { id: `tab-${Date.now()}`, label: "새 탭", content: "" }];
    updateConfig("tabs", newTabs);
  };

  const updateTab = (index: number, field: string, value: string) => {
    const newTabs = [...tabs];
    newTabs[index] = { ...newTabs[index], [field]: value };
    updateConfig("tabs", newTabs);
  };

  const removeTab = (index: number) => {
    const newTabs = tabs.filter((_: any, i: number) => i !== index);
    updateConfig("tabs", newTabs);
  };

  return (
    <div className="space-y-4">
      {/* ─── 1단계: 그룹 타입 선택 (카드) ─── */}
      <div className="space-y-2">
        <p className="text-sm font-medium">어떤 방식으로 영역을 구성하나요?</p>
        <div className="grid grid-cols-3 gap-2">
          {GROUP_TYPE_CARDS.map((card) => {
            const Icon = card.icon;
            const isSelected = currentGroupType === card.value;
            return (
              <button
                key={card.value}
                type="button"
                onClick={() => updateConfig("groupType", card.value)}
                className={cn(
                  "flex flex-col items-center justify-center rounded-lg border p-3 text-center transition-all min-h-[80px]",
                  isSelected
                    ? "border-primary bg-primary/5 ring-1 ring-primary/20"
                    : "border-border hover:border-primary/50 hover:bg-muted/50",
                )}
              >
                <Icon className="h-5 w-5 mb-1.5 text-primary" />
                <span className="text-xs font-medium leading-tight">
                  {card.title}
                </span>
                <span className="text-[10px] text-muted-foreground leading-tight mt-0.5">
                  {card.description}
                </span>
              </button>
            );
          })}
        </div>
      </div>

      {/* ─── 2단계: 기본 설정 ─── */}
      <div className="rounded-lg border bg-muted/30 p-4 space-y-3">
        <span className="text-sm font-medium">기본 설정</span>

        <div className="flex items-center justify-between py-1.5">
          <span className="text-xs text-muted-foreground">제목</span>
          <Input
            value={config.title || ""}
            onChange={(e) => updateConfig("title", e.target.value)}
            placeholder="그룹 제목"
            className="h-8 w-[180px] text-sm"
          />
        </div>
      </div>

      {/* ─── 3단계: 타입별 설정 ─── */}

      {/* 탭 타입: 탭 목록 관리 */}
      {isTabsType && (
        <div className="rounded-lg border bg-muted/30 p-4 space-y-3">
          <div className="flex items-center justify-between">
            <div className="flex items-center gap-2">
              <Rows3 className="h-4 w-4 text-primary" />
              <span className="text-sm font-medium">탭 목록</span>
            </div>
            <Button
              type="button"
              variant="outline"
              size="sm"
              onClick={addTab}
              className="h-7 px-2 text-xs"
            >
              <Plus className="mr-1 h-3 w-3" />
              추가
            </Button>
          </div>

          {tabs.length > 0 ? (
            <div className="max-h-40 space-y-1.5 overflow-y-auto">
              {tabs.map((tab: any, index: number) => (
                <div key={index} className="flex items-center gap-1.5">
                  <Input
                    value={tab.id || ""}
                    onChange={(e) => updateTab(index, "id", e.target.value)}
                    placeholder="ID"
                    className="h-8 flex-1 text-sm"
                  />
                  <Input
                    value={tab.label || ""}
                    onChange={(e) => updateTab(index, "label", e.target.value)}
                    placeholder="라벨"
                    className="h-8 flex-1 text-sm"
                  />
                  <Button
                    type="button"
                    variant="ghost"
                    size="icon"
                    onClick={() => removeTab(index)}
                    className="text-destructive h-8 w-8 shrink-0"
                  >
                    <Trash2 className="h-4 w-4" />
                  </Button>
                </div>
              ))}
            </div>
          ) : (
            <div className="text-center py-6 text-muted-foreground">
              <Rows3 className="mx-auto mb-2 h-8 w-8 opacity-30" />
              <p className="text-sm">아직 탭이 없어요</p>
              <p className="text-xs mt-0.5">위의 추가 버튼으로 탭을 만들어보세요</p>
            </div>
          )}
        </div>
      )}

      {/* 섹션/아코디언 타입: 접기/펴기 옵션 */}
      {isSectionType && (
        <div className="space-y-2">
          <div className="flex items-center justify-between py-1">
            <div>
              <p className="text-sm">접기/펴기</p>
              <p className="text-[11px] text-muted-foreground">
                사용자가 섹션을 접었다 펼 수 있어요
              </p>
            </div>
            <Switch
              checked={config.collapsible || false}
              onCheckedChange={(checked) => updateConfig("collapsible", checked)}
            />
          </div>

          {config.collapsible && (
            <div className="ml-4 border-l-2 border-primary/20 pl-3">
              <div className="flex items-center justify-between py-1">
                <div>
                  <p className="text-sm">기본으로 펼침</p>
                  <p className="text-[11px] text-muted-foreground">
                    처음에 펼쳐진 상태로 보여줘요
                  </p>
                </div>
                <Switch
                  checked={config.defaultOpen !== false}
                  onCheckedChange={(checked) => updateConfig("defaultOpen", checked)}
                />
              </div>
            </div>
          )}
        </div>
      )}

      {/* 모달/폼모달 타입: 모달 옵션 */}
      {isModalType && (
        <div className="space-y-3">
          <div className="rounded-lg border bg-muted/30 p-4 space-y-3">
            <div className="flex items-center gap-2">
              <AppWindow className="h-4 w-4 text-primary" />
              <span className="text-sm font-medium">모달 설정</span>
            </div>

            <div className="flex items-center justify-between py-1.5">
              <span className="text-xs text-muted-foreground">모달 크기</span>
              <Select
                value={config.modalSize || "md"}
                onValueChange={(value) => updateConfig("modalSize", value)}
              >
                <SelectTrigger className="h-8 w-[180px] text-sm">
                  <SelectValue />
                </SelectTrigger>
                <SelectContent>
                  <SelectItem value="sm">작게 (400px)</SelectItem>
                  <SelectItem value="md">보통 (600px)</SelectItem>
                  <SelectItem value="lg">크게 (800px)</SelectItem>
                  <SelectItem value="xl">매우 크게 (1000px)</SelectItem>
                  <SelectItem value="full">전체 화면</SelectItem>
                </SelectContent>
              </Select>
            </div>
          </div>

          <div className="flex items-center justify-between py-1">
            <div>
              <p className="text-sm">닫기 버튼</p>
              <p className="text-[11px] text-muted-foreground">
                모달 우측 상단에 X 버튼이 표시돼요
              </p>
            </div>
            <Switch
              checked={config.closeable !== false}
              onCheckedChange={(checked) => updateConfig("closeable", checked)}
            />
          </div>

          <div className="flex items-center justify-between py-1">
            <div>
              <p className="text-sm">배경 클릭 닫기</p>
              <p className="text-[11px] text-muted-foreground">
                모달 바깥을 클릭하면 닫혀요
              </p>
            </div>
            <Switch
              checked={config.backdrop !== false}
              onCheckedChange={(checked) => updateConfig("backdrop", checked)}
            />
          </div>
        </div>
      )}

      {/* ─── 4단계: 고급 설정 (기본 접혀있음) ─── */}
      <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">
            <div className="flex items-center justify-between py-1">
              <div>
                <p className="text-sm">헤더 표시</p>
                <p className="text-[11px] text-muted-foreground">
                  그룹 상단에 제목 영역이 표시돼요
                </p>
              </div>
              <Switch
                checked={config.showHeader !== false}
                onCheckedChange={(checked) => updateConfig("showHeader", checked)}
              />
            </div>
          </div>
        </CollapsibleContent>
      </Collapsible>
    </div>
  );
};

V2GroupConfigPanel.displayName = "V2GroupConfigPanel";

export default V2GroupConfigPanel;
