import { useState } from 'react';
import { useParams, Link } from 'react-router-dom';
import {
  usePortfolio,
  usePortfolioMutations,
  usePositionMutations,
} from '../../entities/portfolio';
import { PortfolioForm } from '../../widgets/portfolio-form';
import { PortfolioSummary } from '../../widgets/portfolio-summary';
import { AnalyticsSummary } from '../../widgets/portfolio-analytics';
import { SharePositionTable } from '../../widgets/share-positions-table';
import { BondPositionTable } from '../../widgets/bond-positions-table';

export function PortfolioDetailPage() {
  const { id } = useParams<{ id: string }>();
  const portfolioId = parseInt(id!, 10);

  const { data: portfolio, isLoading, error } = usePortfolio(portfolioId);
  const { update, remove } = usePortfolioMutations();
  const {
    update: updatePosition,
    remove: removePosition,
    add: addPosition,
  } = usePositionMutations(portfolioId);

  const [editing, setEditing] = useState(false);
  const [showAddForm, setShowAddForm] = useState(false);
  const [newSecid, setNewSecid] = useState('');
  const [newQty, setNewQty] = useState('1');
  const [newPrice, setNewPrice] = useState('');
  const [newDate, setNewDate] = useState(new Date().toISOString().split('T')[0]);

  if (isLoading) {
    return (
      <div style={{ padding: 40, textAlign: 'center', color: 'var(--color-text-secondary)' }}>
        Загрузка...
      </div>
    );
  }

  if (error || !portfolio) {
    return (
      <div style={{ padding: 40, textAlign: 'center', color: '#e53935' }}>
        Ошибка загрузки портфеля
      </div>
    );
  }

  async function handleDelete() {
    if (window.confirm('Удалить портфель и все позиции?')) {
      remove.mutate(portfolioId);
    }
  }

  function handleAddPosition() {
    if (!newSecid.trim() || !parseInt(newQty, 10)) return;
    addPosition.mutate(
      {
        secid: newSecid.trim().toUpperCase(),
        quantity: parseInt(newQty, 10),
        buyPrice: newPrice ? parseFloat(newPrice) : undefined,
        buyDate: newDate || undefined,
      },
      {
        onSuccess: () => {
          setShowAddForm(false);
          setNewSecid('');
          setNewQty('1');
          setNewPrice('');
        },
      },
    );
  }

  return (
    <div>
      <div
        style={{
          display: 'flex',
          alignItems: 'center',
          gap: 12,
          marginBottom: 24,
        }}
      >
        <Link
          to="/portfolios"
          style={{ color: 'var(--color-text-secondary)', textDecoration: 'none', fontSize: 14 }}
        >
          ← К списку
        </Link>
        <h1 style={{ margin: 0, fontSize: 24, fontWeight: 700 }}>{portfolio.name}</h1>
        <button
          onClick={() => setEditing(!editing)}
          style={{
            marginLeft: 'auto',
            padding: '6px 16px',
            background: 'transparent',
            border: '1px solid #e0e0e0',
            borderRadius: 'var(--border-radius)',
            fontSize: 13,
            cursor: 'pointer',
          }}
        >
          {editing ? 'Закрыть' : 'Редактировать'}
        </button>
        <button
          onClick={handleDelete}
          style={{
            padding: '6px 16px',
            background: 'transparent',
            border: '1px solid #e53935',
            color: '#e53935',
            borderRadius: 'var(--border-radius)',
            fontSize: 13,
            cursor: 'pointer',
          }}
        >
          Удалить
        </button>
      </div>

      {editing && (
        <div
          style={{
            marginBottom: 24,
            padding: 20,
            background: 'var(--color-surface)',
            border: '1px solid #e0e0e0',
            borderRadius: 'var(--border-radius)',
          }}
        >
          <h3 style={{ margin: '0 0 16px', fontSize: 16, fontWeight: 600 }}>
            Редактировать портфель
          </h3>
          <PortfolioForm
            initial={portfolio}
            onSave={(d) => update.mutate({ id: portfolioId, data: d })}
            onCancel={() => setEditing(false)}
            isLoading={update.isPending}
          />
        </div>
      )}

      <PortfolioSummary portfolio={portfolio} />

      {portfolio.analytics && <AnalyticsSummary summary={portfolio.analytics} />}

      <div
        style={{
          marginTop: 24,
          display: 'flex',
          justifyContent: 'space-between',
          alignItems: 'center',
        }}
      >
        <h2 style={{ margin: 0, fontSize: 18, fontWeight: 600 }}>Позиции</h2>
        <button
          onClick={() => setShowAddForm(!showAddForm)}
          style={{
            padding: '6px 16px',
            background: 'var(--color-primary)',
            color: '#fff',
            border: 'none',
            borderRadius: 'var(--border-radius)',
            fontSize: 13,
            fontWeight: 600,
            cursor: 'pointer',
          }}
        >
          + Добавить
        </button>
      </div>

      {showAddForm && (
        <div
          style={{
            marginTop: 12,
            padding: 16,
            background: 'var(--color-surface)',
            border: '1px solid #e0e0e0',
            borderRadius: 'var(--border-radius)',
            display: 'flex',
            gap: 12,
            alignItems: 'flex-end',
          }}
        >
          <div>
            <label style={{ display: 'block', fontSize: 12, fontWeight: 600, marginBottom: 4 }}>
              Тикер
            </label>
            <input
              value={newSecid}
              onChange={(e) => setNewSecid(e.target.value)}
              placeholder="SBER"
              style={{
                padding: '8px 12px',
                border: '1px solid #e0e0e0',
                borderRadius: 'var(--border-radius)',
                fontSize: 14,
                width: 120,
              }}
            />
          </div>
          <div>
            <label style={{ display: 'block', fontSize: 12, fontWeight: 600, marginBottom: 4 }}>
              Количество
            </label>
            <input
              type="number"
              min={1}
              value={newQty}
              onChange={(e) => setNewQty(e.target.value)}
              style={{
                padding: '8px 12px',
                border: '1px solid #e0e0e0',
                borderRadius: 'var(--border-radius)',
                fontSize: 14,
                width: 100,
              }}
            />
          </div>
          <div>
            <label style={{ display: 'block', fontSize: 12, fontWeight: 600, marginBottom: 4 }}>
              Цена покупки
            </label>
            <input
              type="number"
              step="0.01"
              value={newPrice}
              onChange={(e) => setNewPrice(e.target.value)}
              placeholder="0.00"
              style={{
                padding: '8px 12px',
                border: '1px solid #e0e0e0',
                borderRadius: 'var(--border-radius)',
                fontSize: 14,
                width: 120,
              }}
            />
          </div>
          <div>
            <label style={{ display: 'block', fontSize: 12, fontWeight: 600, marginBottom: 4 }}>
              Дата покупки
            </label>
            <input
              type="date"
              value={newDate}
              onChange={(e) => setNewDate(e.target.value)}
              style={{
                padding: '8px 12px',
                border: '1px solid #e0e0e0',
                borderRadius: 'var(--border-radius)',
                fontSize: 14,
                width: 150,
              }}
            />
          </div>
          <button
            onClick={handleAddPosition}
            disabled={addPosition.isPending}
            style={{
              padding: '8px 16px',
              background: 'var(--color-primary)',
              color: '#fff',
              border: 'none',
              borderRadius: 'var(--border-radius)',
              fontSize: 13,
              fontWeight: 600,
              cursor: 'pointer',
            }}
          >
            Добавить
          </button>
        </div>
      )}

      <SharePositionTable
        positions={portfolio.positions.filter((p) => p.type === 'share')}
        onUpdatePosition={(positionId, data) => updatePosition.mutate({ positionId, data })}
        onDeletePosition={(positionId) => {
          if (window.confirm('Удалить позицию?')) removePosition.mutate(positionId);
        }}
      />

      <BondPositionTable
        positions={portfolio.positions.filter((p) => p.type === 'bond')}
        onUpdatePosition={(positionId, data) => updatePosition.mutate({ positionId, data })}
        onDeletePosition={(positionId) => {
          if (window.confirm('Удалить позицию?')) removePosition.mutate(positionId);
        }}
      />
    </div>
  );
}