"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";
import { v2EventBus, V2_EVENTS } from "@/lib/v2-core";

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

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

    console.log("[DataBinding] 구독 시작:", {
      sourceComponentId: dataBinding.sourceComponentId,
      sourceColumn: dataBinding.sourceColumn,
      targetColumn: columnName,
      isInteractive,
      hasOnFormDataChange: !!onFormDataChange,
    });

    const unsubscribe = v2EventBus.subscribe(V2_EVENTS.TABLE_DATA_CHANGE, (payload: any) => {
      console.log("[DataBinding] TABLE_DATA_CHANGE 수신:", {
        payloadSource: payload.source,
        expectedSource: dataBinding.sourceComponentId,
        dataLength: payload.data?.length,
        match: payload.source === dataBinding.sourceComponentId,
      });

      if (payload.source !== dataBinding.sourceComponentId) return;

      const selectedData = payload.data;
      if (selectedData && selectedData.length > 0) {
        const value = selectedData[0][dataBinding.sourceColumn];
        console.log("[DataBinding] 바인딩 값:", { column: dataBinding.sourceColumn, value, columnName });
        if (value !== lastBoundValueRef.current) {
          lastBoundValueRef.current = value;
          if (onFormDataChange && columnName) {
            onFormDataChange(columnName, value ?? "");
          }
        }
      } else {
        if (lastBoundValueRef.current !== null) {
          lastBoundValueRef.current = null;
          if (onFormDataChange && columnName) {
            onFormDataChange(columnName, "");
          }
        }
      }
    });

    return () => unsubscribe();
  }, [dataBinding?.sourceComponentId, dataBinding?.sourceColumn, columnName, onFormDataChange, isInteractive]);

  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;

    if (dataBinding || (config as any).dataBinding || (component as any).dataBinding) {
      console.log("[V2InputRenderer] dataBinding 탐색:", {
        componentId: component.id,
        columnName,
        configKeys: Object.keys(config),
        configDataBinding: config.dataBinding,
        componentDataBinding: (component as any).dataBinding,
        nestedDataBinding: config.componentConfig?.dataBinding,
        finalDataBinding: 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}
          isInteractive={isInteractive}
        >
          {inputElement}
        </DataBindingWrapper>
      );
    }

    return inputElement;
  }
}

// 자동 등록 실행
V2InputRenderer.registerSelf();

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