"use client";

import React, { useEffect, useRef } from "react";
import { AutoRegisteringComponentRenderer } from "../../AutoRegisteringComponentRenderer";
import { V2InputDefinition } from "./index";
import { V2Input } from "@/components/v2/V2Input";
import { isColumnRequiredByMeta } from "../../DynamicComponentRenderer";

/**
 * dataBinding이 설정된 v2-input을 위한 wrapper
 * v2-table-list의 선택 이벤트를 window CustomEvent로 수신하여
 * 선택된 행의 특정 컬럼 값을 자동으로 formData에 반영
 */
function DataBindingWrapper({
  dataBinding,
  columnName,
  onFormDataChange,
  children,
}: {
  dataBinding: { sourceComponentId: string; sourceColumn: string };
  columnName: string;
  onFormDataChange?: (field: string, value: any) => void;
  children: React.ReactNode;
}) {
  const lastBoundValueRef = useRef<any>(null);
  const onFormDataChangeRef = useRef(onFormDataChange);
  onFormDataChangeRef.current = onFormDataChange;

  useEffect(() => {
    if (!dataBinding?.sourceComponentId || !dataBinding?.sourceColumn) return;

    const handler = (e: Event) => {
      const detail = (e as CustomEvent).detail;
      if (!detail || detail.source !== dataBinding.sourceComponentId) return;

      const selectedRow = detail.data?.[0];
      const value = selectedRow?.[dataBinding.sourceColumn] ?? "";
      if (value !== lastBoundValueRef.current) {
        lastBoundValueRef.current = value;
        onFormDataChangeRef.current?.(columnName, value);
      }
    };

    window.addEventListener("v2-table-selection", handler);
    return () => window.removeEventListener("v2-table-selection", handler);
  }, [dataBinding?.sourceComponentId, dataBinding?.sourceColumn, columnName]);

  return <>{children}</>;
}

/**
 * V2Input 렌더러
 * 자동 등록 시스템을 사용하여 컴포넌트를 레지스트리에 등록
 */
export class V2InputRenderer extends AutoRegisteringComponentRenderer {
  static componentDefinition = V2InputDefinition;

  render(): React.ReactElement {
    const { component, formData, onFormDataChange, isDesignMode, isSelected, isInteractive, ...restProps } = this.props;

    const config = component.componentConfig || component.config || {};
    const columnName = component.columnName;
    const tableName = component.tableName || this.props.tableName;

    const currentValue = formData?.[columnName] ?? component.value ?? "";

    const handleChange = (value: any) => {
      if (isInteractive && onFormDataChange && columnName) {
        onFormDataChange(columnName, value);
      }
    };

    const style = component.style || {};
    const labelDisplay = style.labelDisplay ?? (component as any).labelDisplay;
    const effectiveLabel = labelDisplay === true ? style.labelText || component.label : undefined;

    const dataBinding = config.dataBinding || (component as any).dataBinding || config.componentConfig?.dataBinding;

    const inputElement = (
      <V2Input
        id={component.id}
        value={currentValue}
        onChange={handleChange}
        onFormDataChange={onFormDataChange}
        config={{
          type: config.inputType || config.webType || "text",
          inputType: config.inputType || config.webType || "text",
          placeholder: config.placeholder,
          format: config.format,
          min: config.min,
          max: config.max,
          step: config.step,
          rows: config.rows,
          autoGeneration: config.autoGeneration || component.autoGeneration,
        }}
        style={component.style}
        size={component.size}
        formData={formData}
        columnName={columnName}
        tableName={tableName}
        autoGeneration={config.autoGeneration || component.autoGeneration}
        originalData={(this.props as any).originalData}
        {...restProps}
        label={effectiveLabel}
        required={component.required || isColumnRequiredByMeta(tableName, columnName)}
        readonly={config.readonly || component.readonly || !!dataBinding?.sourceComponentId}
        disabled={config.disabled || component.disabled}
      />
    );

    // dataBinding이 있으면 wrapper로 감싸서 이벤트 구독
    if (dataBinding?.sourceComponentId && dataBinding?.sourceColumn) {
      return (
        <DataBindingWrapper
          dataBinding={dataBinding}
          columnName={columnName}
          onFormDataChange={onFormDataChange}
        >
          {inputElement}
        </DataBindingWrapper>
      );
    }

    return inputElement;
  }
}

// 자동 등록 실행
V2InputRenderer.registerSelf();

// Hot Reload 지원 (개발 모드)
if (process.env.NODE_ENV === "development") {
  V2InputRenderer.enableHotReload();
}
