import { useState } from 'react';
import {
  Box, CircularProgress, Alert, Table, TableBody, TableCell, TableContainer,
  TableHead, TableRow, Paper, Typography, Dialog, DialogTitle,
  DialogContent, IconButton
} from '@mui/material';
import CloseIcon from '@mui/icons-material/Close';
import ArrowUpwardIcon from '@mui/icons-material/ArrowUpward';
import ArrowDownwardIcon from '@mui/icons-material/ArrowDownward';
import RemoveIcon from '@mui/icons-material/Remove';
import { formatFullDateTime } from '../utils/formatters';
import type { CotizacionBolsa } from '../models/mercadoModels';
import { useApiData } from '../hooks/useApiData';
import { HistoricalChartWidget } from './HistoricalChartWidget';

// Usamos el formato de EEUU para los precios en dólares
const formatCurrency = (num: number) => new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' }).format(num);
const formatPercentage = (num: number) => num.toFixed(2);

const Variacion = ({ value }: { value: number }) => {
  const color = value > 0 ? 'success.main' : value < 0 ? 'error.main' : 'text.secondary';
  const Icon = value > 0 ? ArrowUpwardIcon : value < 0 ? ArrowDownwardIcon : RemoveIcon;
  return (
    <Box component="span" sx={{ display: 'flex', alignItems: 'center', justifyContent: 'center', color }}>
      <Icon sx={{ fontSize: '1rem', mr: 0.5 }} />
      <Typography variant="body2" component="span" sx={{ fontWeight: 'bold' }}>{formatPercentage(value)}%</Typography>
    </Box>
  );
};

export const BolsaUsaWidget = () => {
  const { data, loading, error } = useApiData<CotizacionBolsa[]>('/mercados/bolsa/eeuu');
  const [selectedTicker, setSelectedTicker] = useState<string | null>(null);

  const handleRowClick = (ticker: string) => {
    setSelectedTicker(ticker);
  };

  const handleCloseDialog = () => {
    setSelectedTicker(null);
  };

  if (loading) {
    return <Box sx={{ display: 'flex', justifyContent: 'center', p: 4 }}><CircularProgress /></Box>;
  }

  if (error) {
    return <Alert severity="error">{error}</Alert>;
  }

  // Recordatorio de que el fetcher puede estar desactivado
  if (!data || data.length === 0) {
    return <Alert severity="info">No hay datos disponibles para el mercado de EEUU. (El fetcher podría estar desactivado en el Worker).</Alert>;
  }

  return (
    <>
      <TableContainer component={Paper}>
        <Box sx={{ p: 1, pb: 0 }}>
          <Typography variant="caption" sx={{ fontStyle: 'italic', color: 'text.secondary' }}>
            Última actualización: {formatFullDateTime(data[0].fechaRegistro)}
          </Typography>
        </Box>
        <Table size="small" aria-label="tabla bolsa eeuu">
          <TableHead>
            <TableRow>
              <TableCell>Símbolo</TableCell>
              <TableCell align="right">Precio Actual</TableCell>
              <TableCell align="right">Apertura</TableCell>
              <TableCell align="right">Cierre Anterior</TableCell>
              <TableCell align="center">% Cambio</TableCell>
            </TableRow>
          </TableHead>
          <TableBody>
            {data.map((row) => (
              <TableRow key={row.ticker} hover sx={{ cursor: 'pointer' }} onClick={() => handleRowClick(row.ticker)}>
                <TableCell component="th" scope="row"><Typography variant="body2" sx={{ fontWeight: 'bold' }}>{row.ticker}</Typography></TableCell>
                <TableCell align="right">{formatCurrency(row.precioActual)}</TableCell>
                <TableCell align="right">{formatCurrency(row.apertura)}</TableCell>
                <TableCell align="right">{formatCurrency(row.cierreAnterior)}</TableCell>
                <TableCell align="center"><Variacion value={row.porcentajeCambio} /></TableCell>
              </TableRow>
            ))}
          </TableBody>
        </Table>
      </TableContainer>

      <Dialog open={Boolean(selectedTicker)} onClose={handleCloseDialog} maxWidth="md" fullWidth>
        <DialogTitle sx={{ m: 0, p: 2 }}>
          Historial de 30 días para: {selectedTicker}
          <IconButton
            aria-label="close"
            onClick={handleCloseDialog}
            sx={{ position: 'absolute', right: 8, top: 8, color: (theme) => theme.palette.grey[500] }}
          >
            <CloseIcon />
          </IconButton>
        </DialogTitle>
        <DialogContent dividers>
          {selectedTicker && <HistoricalChartWidget ticker={selectedTicker} mercado="EEUU" />}
        </DialogContent>
      </Dialog>
    </>
  );
};