import { Link } from 'react-router-dom';
import type { BrokerMoney, BrokerPosition } from '../../api/responses';
import { getBrokerInstrumentPath, getBrokerPositionGroup } from './brokerDisplay';

type BrokerPositionGroupConfig = {
  key: 'shares' | 'bonds' | 'other';
  title: string;
};

const GROUPS: BrokerPositionGroupConfig[] = [
  { key: 'shares', title: 'Акции' },
  { key: 'bonds', title: 'Облигации' },
  { key: 'other', title: 'Другие инструменты' },
];

const tableStyle = {
  width: '100%',
  borderCollapse: 'collapse',
  fontSize: 14,
} satisfies React.CSSProperties;

const thStyle = {
  borderBottom: '1px solid #e0e0e0',
  color: 'var(--color-text-secondary)',
  fontWeight: 600,
  padding: '10px 8px',
} satisfies React.CSSProperties;

const tdStyle = {
  borderBottom: '1px solid #eeeeee',
  padding: '10px 8px',
  verticalAlign: 'top',
} satisfies React.CSSProperties;

function formatMoney(value: BrokerMoney | null | undefined) {
  if (!value) return '-';

  return new Intl.NumberFormat('ru-RU', {
    style: 'currency',
    currency: value.currency || 'RUB',
    maximumFractionDigits: 2,
  }).format(value.value);
}

function formatQuantity(value: number | null | undefined) {
  return value == null ? '-' : value.toLocaleString('ru-RU');
}

function PositionTicker({ position }: { position: BrokerPosition }) {
  const label = position.ticker || position.figi || '-';
  const path = getBrokerInstrumentPath({
    ticker: position.ticker,
    instrumentType: position.instrumentType,
    classCode: position.classCode,
  });

  if (!path || label === '-') {
    return <strong>{label}</strong>;
  }

  return (
    <Link to={path} style={{ fontWeight: 700 }}>
      {label}
    </Link>
  );
}

function PositionTable({ title, positions }: { title: string; positions: BrokerPosition[] }) {
  return (
    <section>
      <h3 style={{ fontSize: 18, marginBottom: 10 }}>{title}</h3>
      <div style={{ overflowX: 'auto', background: 'var(--color-surface)' }}>
        <table aria-label={`Брокерские позиции: ${title}`} style={tableStyle}>
          <thead>
            <tr>
              <th align="left" style={thStyle}>
                Тикер
              </th>
              <th align="left" style={thStyle}>
                Название
              </th>
              <th align="right" style={thStyle}>
                Количество
              </th>
              <th align="right" style={thStyle}>
                Цена
              </th>
              <th align="right" style={thStyle}>
                Стоимость
              </th>
            </tr>
          </thead>
          <tbody>
            {positions.map((position) => (
              <tr
                key={
                  position.positionUid || position.instrumentUid || position.ticker || position.figi
                }
              >
                <td style={tdStyle}>
                  <PositionTicker position={position} />
                </td>
                <td style={tdStyle}>
                  <span style={{ color: 'var(--color-text-secondary)' }}>
                    {position.name || '-'}
                  </span>
                </td>
                <td align="right" style={tdStyle}>
                  {formatQuantity(position.quantity)}
                </td>
                <td align="right" style={tdStyle}>
                  {formatMoney(position.currentPrice)}
                </td>
                <td align="right" style={tdStyle}>
                  {formatMoney(position.currentValue)}
                </td>
              </tr>
            ))}
          </tbody>
        </table>
      </div>
    </section>
  );
}

export function BrokerPositionsSection({ positions }: { positions: BrokerPosition[] }) {
  const grouped = GROUPS.map((group) => ({
    ...group,
    positions: positions.filter((position) => getBrokerPositionGroup(position) === group.key),
  })).filter((group) => group.positions.length > 0);

  if (grouped.length === 0) {
    return (
      <section>
        <h2 style={{ fontSize: 20, marginBottom: 12 }}>Позиции</h2>
        <p style={{ color: 'var(--color-text-secondary)' }}>В портфеле нет позиций</p>
      </section>
    );
  }

  return (
    <section>
      <h2 style={{ fontSize: 20, marginBottom: 12 }}>Позиции</h2>
      <div style={{ display: 'grid', gap: 20 }}>
        {grouped.map((group) => (
          <PositionTable key={group.key} title={group.title} positions={group.positions} />
        ))}
      </div>
    </section>
  );
}