import React from 'react';
import { Button, Typography } from 'antd';
import MatchSelector from './MatchSelector';
import { GAP, LEFT_WIDTH, ROW_HEIGHT } from './JinshujuMatchModal.types';
import type { JinshujuEntryRow, MatchDecision, StudentOption } from './JinshujuMatchModal.types';

const { Text } = Typography;

interface MatchStepProps {
  entries: JinshujuEntryRow[];
  studentOptions: StudentOption[];
  getDecision: (serial: number) => MatchDecision | undefined;
  onDecisionChange: (serial: number, d: MatchDecision) => void;
  onClear: () => void;
  leftRef: React.RefObject<HTMLDivElement | null>;
  rightRef: React.RefObject<HTMLDivElement | null>;
  onScroll: (source: 'left' | 'right') => void;
  total: number;
  matched: number;
}

const MatchStep: React.FC<MatchStepProps> = ({
  entries,
  studentOptions,
  getDecision,
  onDecisionChange,
  onClear,
  leftRef,
  rightRef,
  onScroll,
  total,
  matched,
}) => {
  const svgHeight = entries.length * ROW_HEIGHT;
  const lines: React.ReactNode[] = [];
  entries.forEach((entry, i) => {
    const y = i * ROW_HEIGHT + ROW_HEIGHT / 2;
    const d = getDecision(entry.serialNumber);
    const isMatched = d?.action === 'match';
    const color = isMatched ? '#1677ff' : '#d9d9d9';
    lines.push(
      <line
        key={entry.serialNumber}
        x1={LEFT_WIDTH}
        y1={y}
        x2={LEFT_WIDTH + GAP}
        y2={y}
        stroke={color}
        strokeWidth={isMatched ? 2 : 1}
        strokeDasharray={isMatched ? undefined : '4 4'}
        opacity={isMatched ? 0.7 : 0.3}
      />,
    );
  });

  return (
    <div style={{ position: 'relative' }}>
      <div
        style={{
          marginBottom: 12,
          display: 'flex',
          justifyContent: 'space-between',
          alignItems: 'center',
        }}
      >
        <Text type="secondary">
          共 {total} 条，已匹配 {matched} 条
        </Text>
        <Button size="small" onClick={onClear}>
          清除全部匹配
        </Button>
      </div>
      <div style={{ display: 'flex', position: 'relative' }}>
        <svg
          style={{
            position: 'absolute',
            top: 0,
            left: 0,
            width: LEFT_WIDTH + GAP,
            height: svgHeight,
            pointerEvents: 'none',
            zIndex: 1,
          }}
        >
          {lines}
        </svg>
        <div
          ref={leftRef}
          onScroll={() => onScroll('left')}
          style={{ width: LEFT_WIDTH, maxHeight: 480, overflowY: 'auto', flexShrink: 0 }}
        >
          {entries.map((entry, i) => {
            const d = getDecision(entry.serialNumber);
            const isMatched = d?.action === 'match';
            return (
              <div
                key={entry.serialNumber}
                style={{
                  height: ROW_HEIGHT,
                  padding: '8px 12px',
                  borderBottom: '1px solid #f0f0f0',
                  display: 'flex',
                  flexDirection: 'column',
                  justifyContent: 'center',
                  background: isMatched ? '#f6ffed' : i % 2 === 0 ? '#fafafa' : '#fff',
                  borderLeft: isMatched ? '3px solid #1677ff' : '3px solid transparent',
                }}
              >
                <Text strong style={{ fontSize: 13 }}>
                  {entry.name || <Text type="secondary">无姓名</Text>}
                </Text>
                {entry.phone && (
                  <Text type="secondary" style={{ fontSize: 12 }}>
                    {entry.phone}
                  </Text>
                )}
                <Text type="secondary" style={{ fontSize: 11 }}>
                  #{entry.serialNumber}
                </Text>
              </div>
            );
          })}
        </div>
        <div style={{ width: GAP, flexShrink: 0 }} />
        <div
          ref={rightRef}
          onScroll={() => onScroll('right')}
          style={{ flex: 1, maxHeight: 480, overflowY: 'auto' }}
        >
          {entries.map((entry) => (
            <div
              key={entry.serialNumber}
              style={{
                height: ROW_HEIGHT,
                padding: '8px 12px',
                borderBottom: '1px solid #f0f0f0',
                display: 'flex',
                alignItems: 'center',
                gap: 8,
              }}
            >
              <MatchSelector
                entry={entry}
                decision={getDecision(entry.serialNumber)}
                studentOptions={studentOptions}
                onChange={(newD) => onDecisionChange(entry.serialNumber, newD)}
              />
            </div>
          ))}
        </div>
      </div>
    </div>
  );
};

export default MatchStep;