'use client';

import { useRef, useCallback } from 'react';
import { Database, X } from 'lucide-react';
import { PortHandle } from './PortHandle';
import { useControlMode } from './hooks/useControlMode';

interface TableNodeProps {
  tableName: string;
  label: string;
  /** 호환용 — 더 이상 사용 X (V3 컴팩트로 갈아엎으면서 이모지 폐기, Lucide Database 아이콘 고정) */
  icon?: string;
  columns: Record<string, any>[];
  x: number;
  y: number;
  style?: React.CSSProperties;
  onMove?: (name: string, x: number, y: number) => void;
  /** 룰 노드 ID (PortHandle 연결용). 없으면 시각 카드만 (read-only) */
  nodeId?: string;
  onPortDragStart?: (nodeId: string, port: string, e: React.MouseEvent) => void;
  onPortDragEnd?: (nodeId: string, port: string) => void;
}

/**
 * 테이블 카드 — V3RuleNode 와 일관된 컴팩트 디자인
 *   - 180px 폭, cyan top stripe, Lucide Database 아이콘
 *   - 한글 라벨 메인 + mono 영문 sub
 *   - stats row: `{N} cols · {K} FK`
 *   - 좌·우 edge 에 단일 port 1개씩 (테이블 단위 연결 — 컬럼은 노드 설정창 dropdown 에서)
 */
export function TableNode({
  tableName, label, columns, x, y, style, onMove, nodeId, onPortDragStart, onPortDragEnd,
}: TableNodeProps) {
  const nodeRef = useRef<HTMLDivElement>(null);
  const removeRuleNode = useControlMode((s) => s.removeRuleNode);

  const handleMouseDown = useCallback((e: React.MouseEvent) => {
    if (!onMove) return;
    const target = e.target as HTMLElement;
    if (target.closest('.ctrl-io-port, button')) return;
    e.preventDefault();
    e.stopPropagation();
    const sx = e.clientX, sy = e.clientY;
    const sl = x, st = y;
    const el = nodeRef.current;
    if (el) el.style.zIndex = '30';
    let moved = false;

    const move = (ev: MouseEvent) => {
      const dx = ev.clientX - sx, dy = ev.clientY - sy;
      if (!moved && Math.abs(dx) + Math.abs(dy) < 2) return;
      moved = true;
      onMove(tableName, sl + dx, st + dy);
    };
    const up = () => {
      if (el) el.style.zIndex = '20';
      document.removeEventListener('mousemove', move);
      document.removeEventListener('mouseup', up);
    };
    document.addEventListener('mousemove', move);
    document.addEventListener('mouseup', up);
  }, [onMove, tableName, x, y]);

  // stats
  const totalCols = columns?.length ?? 0;
  const fkCount = (columns ?? []).filter((c) => c.mark === 'FK' || c.type === 'entity').length;
  const pkCount = (columns ?? []).filter((c) => c.pk).length;
  const hasKoLabel = label && label !== tableName;

  return (
    <div
      ref={nodeRef}
      className="tbl-node tbl-node-compact"
      data-table={tableName}
      data-node-id={nodeId}
      onMouseDown={handleMouseDown}
      style={{ left: x, top: y, ...style }}
    >
      {/* cyan top stripe (V3RuleNode cat-stripe 와 일관) */}
      <div className="tbl-node-stripe" />

      <div className="tbl-node-head">
        <div className="tbl-node-ico"><Database size={11} /></div>
        <div className="tbl-node-title">
          <div className="tbl-node-label">{hasKoLabel ? label : tableName}</div>
          {hasKoLabel && <div className="tbl-node-sub">{tableName}</div>}
        </div>
        {nodeId && (
          <button
            type="button"
            className="tbl-node-del"
            title="삭제"
            onClick={(e) => { e.stopPropagation(); removeRuleNode(nodeId); }}
          >
            <X size={10} />
          </button>
        )}
      </div>

      <div className="tbl-node-stats">
        <span>{totalCols} cols</span>
        {pkCount > 0 && <span>· {pkCount} PK</span>}
        {fkCount > 0 && <span>· {fkCount} FK</span>}
      </div>

      {/* 좌·우 단일 port — 테이블 단위 연결 (컬럼 선택은 노드 설정창 dropdown) */}
      {nodeId && (
        <>
          <PortHandle
            nodeId={nodeId}
            port="in"
            type="in"
            onDragEnd={onPortDragEnd}
            onDragStart={onPortDragStart}
          />
          <div className="ctrl-an-ports-out">
            <PortHandle
              nodeId={nodeId}
              port="out"
              type="out"
              onDragStart={onPortDragStart}
              onDragEnd={onPortDragEnd}
            />
          </div>
        </>
      )}
    </div>
  );
}