import { useQuery } from '@tanstack/react-query';
import { Box, Typography, Skeleton, Chip } from '@mui/material';
import apiClient from '../../lib/api/client';
import { formatCurrency } from '../../lib/format';

interface VendorProposal {
  id: string;
  vendorName: string;
  fileName: string;
  totalVendorCost: number;
  processingStatus: string;
  extractedData: {
    lineItems?: Array<{
      description: string;
      quantity?: number;
      unitPrice?: number;
      total?: number;
    }>;
  } | null;
}

interface VendorDataPanelProps {
  proposalId: string;
}

export default function VendorDataPanel({ proposalId }: VendorDataPanelProps) {
  const { data: vendors, isLoading } = useQuery<VendorProposal[]>({
    queryKey: ['vendorProposals', proposalId],
    queryFn: async () => {
      const res = await apiClient.get(`/proposals/${proposalId}/vendors`);
      return res.data;
    },
    enabled: !!proposalId,
  });

  if (isLoading) {
    return <Skeleton variant="rectangular" height={60} />;
  }

  if (!vendors || vendors.length === 0) {
    return (
      <Box>
        <Typography variant="subtitle2" sx={{ mb: 0.5 }}>Vendor Data</Typography>
        <Typography variant="body2" color="text.secondary">No vendor proposals attached</Typography>
      </Box>
    );
  }

  return (
    <Box>
      <Typography variant="subtitle2" sx={{ mb: 1 }}>Vendor Data</Typography>
      {vendors.map((vp) => (
        <Box key={vp.id} sx={{ mb: 2 }}>
          <Box sx={{ display: 'flex', alignItems: 'center', gap: 1, mb: 0.5 }}>
            <Typography variant="body2" sx={{ fontWeight: 600 }}>{vp.vendorName}</Typography>
            <Chip
              label={vp.processingStatus}
              size="small"
              color={vp.processingStatus === 'Complete' ? 'success' : 'default'}
              variant="outlined"
            />
          </Box>
          <Typography variant="caption" color="text.secondary">{vp.fileName}</Typography>

          {vp.totalVendorCost > 0 && (
            <Typography variant="body2" sx={{ mt: 0.5, fontWeight: 600 }}>
              Vendor Total: {formatCurrency(vp.totalVendorCost)}
            </Typography>
          )}

          {vp.extractedData?.lineItems && vp.extractedData.lineItems.length > 0 && (
            <Box sx={{ mt: 1, pl: 1, borderLeft: 2, borderColor: 'divider' }}>
              {vp.extractedData.lineItems.map((li, i) => (
                <Box key={i} sx={{ mb: 0.5 }}>
                  <Typography variant="caption" sx={{ display: 'block' }}>
                    {li.description}
                  </Typography>
                  {li.total != null && (
                    <Typography variant="caption" color="text.secondary">
                      {formatCurrency(li.total)}
                    </Typography>
                  )}
                </Box>
              ))}
            </Box>
          )}
        </Box>
      ))}
    </Box>
  );
}