import { useNavigate } from 'react-router-dom';
import {
  Box,
  Typography,
  Card,
  CardContent,
  Table,
  TableBody,
  TableCell,
  TableContainer,
  TableHead,
  TableRow,
  TablePagination,
  Chip,
  TextField,
  InputAdornment,
  Button,
  Skeleton,
} from '@mui/material';
import SearchIcon from '@mui/icons-material/Search';
import AddCircleIcon from '@mui/icons-material/AddCircle';
import { usePaginatedList } from '../../../hooks/usePaginatedList';
import { proposalsApi, type ProposalListItem } from '../../../lib/api/proposals';

const STATUS_COLORS: Record<string, 'default' | 'info' | 'warning' | 'success' | 'error'> = {
  Draft: 'default',
  InReview: 'info',
  Approved: 'success',
  Sent: 'success',
  Revised: 'warning',
};

function formatCurrency(amount: number): string {
  return new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' }).format(amount);
}

function formatDate(iso: string): string {
  return new Date(iso).toLocaleDateString('en-US', { month: 'short', day: 'numeric', year: 'numeric' });
}

export default function ProposalListPage() {
  const navigate = useNavigate();
  const {
    rows,
    search,
    setSearch,
    page,
    setPage,
    pageSize,
    setPageSize,
    totalCount,
    loading,
    err,
  } = usePaginatedList<ProposalListItem>(proposalsApi.getAll);

  return (
    <Box>
      <Box sx={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', mb: 2 }}>
        <Typography variant="h5">My Proposals</Typography>
        <Button
          variant="contained"
          startIcon={<AddCircleIcon />}
          onClick={() => navigate('/proposals/new')}
        >
          New Proposal
        </Button>
      </Box>

      <Card>
        <CardContent sx={{ pb: 0 }}>
          <TextField
            size="small"
            placeholder="Search proposals..."
            value={search}
            onChange={(e) => setSearch(e.target.value)}
            sx={{ mb: 2, width: 320 }}
            slotProps={{
              input: {
                startAdornment: (
                  <InputAdornment position="start">
                    <SearchIcon fontSize="small" />
                  </InputAdornment>
                ),
              },
            }}
          />

          {err && (
            <Typography color="error" sx={{ mb: 2 }}>
              {err}
            </Typography>
          )}

          <TableContainer>
            <Table size="small">
              <TableHead>
                <TableRow>
                  <TableCell>Proposal #</TableCell>
                  <TableCell>Customer</TableCell>
                  <TableCell>WO #</TableCell>
                  <TableCell>Category</TableCell>
                  <TableCell>Priority</TableCell>
                  <TableCell>Status</TableCell>
                  <TableCell align="right">Bid Amount</TableCell>
                  <TableCell>Submitted</TableCell>
                </TableRow>
              </TableHead>
              <TableBody>
                {loading
                  ? Array.from({ length: 5 }).map((_, i) => (
                      <TableRow key={i}>
                        {Array.from({ length: 8 }).map((_, j) => (
                          <TableCell key={j}>
                            <Skeleton variant="text" />
                          </TableCell>
                        ))}
                      </TableRow>
                    ))
                  : rows.map((row) => (
                      <TableRow
                        key={row.id}
                        hover
                        sx={{ cursor: 'pointer' }}
                        onClick={() => navigate(`/proposals/${row.id}`)}
                      >
                        <TableCell sx={{ fontWeight: 600 }}>{row.proposalNumber}</TableCell>
                        <TableCell>{row.customerName}</TableCell>
                        <TableCell>{row.workOrderNumber}</TableCell>
                        <TableCell>{row.serviceCategory}</TableCell>
                        <TableCell>{row.priority}</TableCell>
                        <TableCell>
                          <Chip
                            label={row.status}
                            size="small"
                            color={STATUS_COLORS[row.status] || 'default'}
                          />
                        </TableCell>
                        <TableCell align="right">{formatCurrency(row.totalBidAmount)}</TableCell>
                        <TableCell>{formatDate(row.submittedAt)}</TableCell>
                      </TableRow>
                    ))}
                {!loading && rows.length === 0 && (
                  <TableRow>
                    <TableCell colSpan={8} align="center" sx={{ py: 4 }}>
                      <Typography color="text.secondary">
                        No proposals found. Create your first one!
                      </Typography>
                    </TableCell>
                  </TableRow>
                )}
              </TableBody>
            </Table>
          </TableContainer>

          <TablePagination
            component="div"
            count={totalCount}
            page={page - 1}
            onPageChange={(_, newPage) => setPage(newPage + 1)}
            rowsPerPage={pageSize}
            onRowsPerPageChange={(e) => setPageSize(parseInt(e.target.value, 10))}
            rowsPerPageOptions={[12, 24, 48]}
          />
        </CardContent>
      </Card>
    </Box>
  );
}