"use client";

import React, { useState, useEffect, useRef } from "react";
import { Label } from "@/components/ui/label";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import { ConditionalContainerProps, ConditionalSection } from "./types";
import { ConditionalSectionViewer } from "./ConditionalSectionViewer";
import { cn } from "@/lib/utils";

/**
 * 조건부 컨테이너 컴포넌트
 * 상단 셀렉트박스 값에 따라 하단에 다른 UI를 표시
 */
export function ConditionalContainerComponent({
  config,
  controlField: propControlField,
  controlLabel: propControlLabel,
  sections: propSections,
  defaultValue: propDefaultValue,
  showBorder: propShowBorder,
  spacing: propSpacing,
  value,
  onChange,
  formData,
  onFormDataChange,
  isDesignMode = false,
  onUpdateComponent,
  onDeleteComponent,
  onSelectComponent,
  selectedComponentId,
  onHeightChange,
  componentId,
  style,
  className,
}: ConditionalContainerProps) {
  // config prop 우선, 없으면 개별 prop 사용
  const controlField = config?.controlField || propControlField || "condition";
  const controlLabel = config?.controlLabel || propControlLabel || "조건 선택";
  const sections = config?.sections || propSections || [];
  const defaultValue = config?.defaultValue || propDefaultValue || sections[0]?.condition;
  const showBorder = config?.showBorder ?? propShowBorder ?? true;
  const spacing = config?.spacing || propSpacing || "normal";

  // 현재 선택된 값
  const [selectedValue, setSelectedValue] = useState<string>(
    value || formData?.[controlField] || defaultValue || ""
  );

  // formData 변경 시 동기화
  useEffect(() => {
    if (formData?.[controlField]) {
      setSelectedValue(formData[controlField]);
    }
  }, [formData, controlField]);

  // 값 변경 핸들러
  const handleValueChange = (newValue: string) => {
    setSelectedValue(newValue);
    
    if (onChange) {
      onChange(newValue);
    }
    
    if (onFormDataChange) {
      onFormDataChange(controlField, newValue);
    }
  };

  // 컨테이너 높이 측정용 ref
  const containerRef = useRef<HTMLDivElement>(null);
  const previousHeightRef = useRef<number>(0);

  // 높이 변화 감지 및 콜백 호출
  useEffect(() => {
    if (!containerRef.current || isDesignMode || !onHeightChange) return;

    const resizeObserver = new ResizeObserver((entries) => {
      for (const entry of entries) {
        const newHeight = entry.contentRect.height;
        
        // 높이가 실제로 변경되었을 때만 콜백 호출
        if (Math.abs(newHeight - previousHeightRef.current) > 5) {
          console.log(`📏 조건부 컨테이너 높이 변화: ${previousHeightRef.current}px → ${newHeight}px`);
          previousHeightRef.current = newHeight;
          onHeightChange(newHeight);
        }
      }
    });

    resizeObserver.observe(containerRef.current);

    return () => {
      resizeObserver.disconnect();
    };
  }, [isDesignMode, onHeightChange, selectedValue]); // selectedValue 변경 시에도 감지

  // 간격 스타일
  const spacingClass = {
    tight: "space-y-2",
    normal: "space-y-4",
    loose: "space-y-8",
  }[spacing];

  return (
    <div
      ref={containerRef}
      className={cn("h-full w-full flex flex-col", spacingClass, className)}
      style={style}
    >
      {/* 제어 셀렉트박스 */}
      <div className="space-y-2 flex-shrink-0">
        <Label htmlFor={controlField} className="text-xs sm:text-sm">
          {controlLabel}
        </Label>
        <Select value={selectedValue} onValueChange={handleValueChange}>
          <SelectTrigger
            id={controlField}
            className="h-8 text-xs sm:h-10 sm:text-sm"
          >
            <SelectValue placeholder="선택하세요" />
          </SelectTrigger>
          <SelectContent>
            {sections.map((section) => (
              <SelectItem key={section.id} value={section.condition}>
                {section.label}
              </SelectItem>
            ))}
          </SelectContent>
        </Select>
      </div>

      {/* 조건별 섹션들 */}
      <div className="flex-1 min-h-0">
        {isDesignMode ? (
          // 디자인 모드: 모든 섹션 표시
          <div className={spacingClass}>
            {sections.map((section) => (
              <ConditionalSectionViewer
                key={section.id}
                sectionId={section.id}
                condition={section.condition}
                label={section.label}
                screenId={section.screenId}
                screenName={section.screenName}
                isActive={selectedValue === section.condition}
                isDesignMode={isDesignMode}
                showBorder={showBorder}
                formData={formData}
                onFormDataChange={onFormDataChange}
              />
            ))}
          </div>
        ) : (
          // 실행 모드: 활성 섹션만 표시
          sections.map((section) =>
            selectedValue === section.condition ? (
              <ConditionalSectionViewer
                key={section.id}
                sectionId={section.id}
                condition={section.condition}
                label={section.label}
                screenId={section.screenId}
                screenName={section.screenName}
                isActive={true}
                isDesignMode={false}
                showBorder={showBorder}
                formData={formData}
                onFormDataChange={onFormDataChange}
              />
            ) : null
          )
        )}

        {/* 섹션이 없는 경우 안내 */}
        {sections.length === 0 && isDesignMode && (
          <div className="flex items-center justify-center min-h-[200px] border-2 border-dashed border-muted-foreground/30 rounded-lg bg-muted/20">
            <p className="text-sm text-muted-foreground">
              설정 패널에서 조건을 추가하세요
            </p>
          </div>
        )}
      </div>
    </div>
  );
}