"use client";

/**
 * ComponentPreviewPanel.tsx — 범용 컴포넌트 미리보기 패널
 *
 * 모든 컴포넌트 타입의 미리보기를 통일된 레이아웃(회색 그리드 + 가운데 배치)으로 제공.
 * 카드/테이블 전용 패널을 대체하는 단일 진입점.
 */

import React, { useCallback, useMemo } from "react";
import { Eye } from "lucide-react";
import type { ComponentConfig } from "@/types/report";
import type { QueryResult } from "../renderers/types";

import { TextRenderer } from "../renderers/TextRenderer";
import { ImageRenderer } from "../renderers/ImageRenderer";
import { DividerRenderer } from "../renderers/DividerRenderer";
import { SignatureRenderer, StampRenderer } from "../renderers/SignatureRenderer";
import { PageNumberRenderer } from "../renderers/PageNumberRenderer";
import { CardRenderer } from "../renderers/CardRenderer";
import { CalculationRenderer } from "../renderers/CalculationRenderer";
import { BarcodeCanvasRenderer } from "../renderers/BarcodeCanvasRenderer";
import { CheckboxRenderer } from "../renderers/CheckboxRenderer";
import { TableRenderer } from "../renderers/TableRenderer";

interface ComponentPreviewPanelProps {
  component: ComponentConfig;
}

const DUMMY_LAYOUT_CONFIG = {
  pages: [{ page_id: "preview_page", page_order: 1 }],
};

export function ComponentPreviewPanel({ component }: ComponentPreviewPanelProps) {
  const dummyGetQueryResult = useCallback(
    (): QueryResult | null => null,
    [],
  );

  const previewWidth = useMemo(
    () => Math.min(component.width || 700, 700),
    [component.width],
  );

  const previewHeight = useMemo(
    () => Math.min(component.height || 400, 550),
    [component.height],
  );

  const renderContent = () => {
    switch (component.type) {
      case "text":
      case "label":
        return (
          <TextRenderer
            component={component}
            getQueryResult={dummyGetQueryResult}
            displayValue={component.content || component.text || "텍스트 미리보기"}
          />
        );

      case "image":
        return <ImageRenderer component={component} />;

      case "divider":
        return <DividerRenderer component={component} />;

      case "signature":
        return <SignatureRenderer component={component} />;

      case "stamp":
        return <StampRenderer component={component} />;

      case "pageNumber":
        return (
          <PageNumberRenderer
            component={component}
            currentPageId="preview_page"
            layoutConfig={DUMMY_LAYOUT_CONFIG}
          />
        );

      case "card":
        return (
          <CardRenderer
            component={component}
            getQueryResult={dummyGetQueryResult}
          />
        );

      case "table":
        return (
          <TableRenderer
            component={component}
            getQueryResult={dummyGetQueryResult}
          />
        );

      case "calculation":
        return (
          <CalculationRenderer
            component={component}
            getQueryResult={dummyGetQueryResult}
          />
        );

      case "barcode":
        return (
          <BarcodeCanvasRenderer
            component={component}
            getQueryResult={dummyGetQueryResult}
          />
        );

      case "checkbox":
        return (
          <CheckboxRenderer
            component={component}
            getQueryResult={dummyGetQueryResult}
          />
        );

      default:
        return (
          <div className="flex h-full w-full items-center justify-center text-sm text-gray-400">
            미리보기를 지원하지 않는 컴포넌트입니다.
          </div>
        );
    }
  };

  return (
    <div className="flex shrink-0 flex-col items-center gap-4 p-5">
      <div className="w-full">
        <div className="mb-1 flex items-center gap-2 text-sm font-semibold text-gray-700">
          <Eye className="h-4 w-4 text-blue-600" />
          미리보기 (저장 전 상태)
        </div>
        <p className="text-xs text-muted-foreground">
          실제 데이터는 저장 후 확인 가능합니다.
        </p>
      </div>
      <div className="flex min-h-[600px] w-full items-center justify-center overflow-auto rounded-xl border border-gray-200 bg-gray-100 p-8">
        <div
          className="overflow-hidden rounded-lg border border-gray-300 bg-white shadow-sm"
          style={{
            width: previewWidth,
            minHeight: previewHeight,
          }}
        >
          {renderContent()}
        </div>
      </div>
    </div>
  );
}