import { Box, Button, Heading, HStack, Input, Spinner, Table, Tbody, Td, Th, Thead, Tr, Text, VStack, List, ListItem } from '@chakra-ui/react';
import { useEffect, useMemo, useState } from 'react';
import { useQuery } from '@tanstack/react-query';
import { facrApi } from '../services/facr/facrApi';
import type { ClubInfo, Competition, TableRow, SearchResult } from '../services/facr/types';
import { TeamLogo } from '../components/common/TeamLogo';

type SelectedClub = { clubId: string; clubType: 'football' | 'futsal' };
const STORAGE_KEY = 'facrClub';

const StandingsPage: React.FC = () => {
  const [query, setQuery] = useState('');
  const [selected, setSelected] = useState<SelectedClub | null>(null);

  useEffect(() => {
    const saved = localStorage.getItem(STORAGE_KEY);
    if (saved) {
      try { setSelected(JSON.parse(saved)); } catch {}
    }
  }, []);

  useEffect(() => {
    if (selected) localStorage.setItem(STORAGE_KEY, JSON.stringify(selected));
  }, [selected]);

  const { data: searchData, isFetching: searching } = useQuery({
    queryKey: ['facr', 'search', query],
    queryFn: () => facrApi.searchClubs(query),
    enabled: query.trim().length >= 3,
  });

  const { data: clubTable, isLoading, isError } = useQuery<ClubInfo>({
    queryKey: ['facr', 'clubTable', selected?.clubType, selected?.clubId],
    queryFn: () => facrApi.getClubTable(selected!.clubId, selected!.clubType),
    enabled: !!selected,
  });

  const tableRows: TableRow[] = useMemo(() => {
    if (!clubTable?.competitions) return [];
    // pick first competition that has table.overall
    const compWithTable: Competition | undefined = clubTable.competitions.find(c => c.table?.overall?.length) || clubTable.competitions[0];
    return compWithTable?.table?.overall || [];
  }, [clubTable]);

  return (
    <VStack align="stretch" spacing={4}>
      <Heading size="lg">Tabulka</Heading>

      <Box bg="white" p={4} borderWidth="1px" borderRadius="md">
        <HStack>
          <Input placeholder="Vyhledat klub (min. 3 znaky)" value={query} onChange={(e) => setQuery(e.target.value)} />
          <Button onClick={() => setQuery(query.trim())} isLoading={searching}>Hledat</Button>
        </HStack>
        {searchData?.results?.length ? (
          <List spacing={2} mt={3}>
            {searchData.results.slice(0, 8).map((r: SearchResult) => (
              <ListItem key={`${r.club_type}-${r.club_id}`}>
                <Button size="sm" variant="ghost" onClick={() => setSelected({ clubId: r.club_id, clubType: r.club_type })}>
                  {r.name}
                </Button>
              </ListItem>
            ))}
          </List>
        ) : null}
      </Box>

      {!selected && (
        <Text color="gray.500">Vyberte klub pro zobrazení tabulky soutěže.</Text>
      )}

      {selected && isLoading && <Spinner />}
      {selected && isError && <Text color="red.500">Chyba při načítání tabulky</Text>}

      {selected && !isLoading && (
        <Table bg="white">
          <Thead>
            <Tr>
              <Th>#</Th>
              <Th>Tým</Th>
              <Th isNumeric>Z</Th>
              <Th isNumeric>V</Th>
              <Th isNumeric>R</Th>
              <Th isNumeric>P</Th>
              <Th isNumeric>Skóre</Th>
              <Th isNumeric>Body</Th>
            </Tr>
          </Thead>
          <Tbody>
            {tableRows.map((row) => (
              <Tr key={row.team_id}>
                <Td>{row.rank}</Td>
                <Td>
                  <HStack>
                    <TeamLogo
                      teamId={row.team_id}
                      teamName={row.team}
                      facrLogo={row.team_logo_url}
                      size="small"
                      alt={row.team}
                      objectFit="contain"
                    />
                    <Text>{row.team}</Text>
                  </HStack>
                </Td>
                <Td isNumeric>{row.played}</Td>
                <Td isNumeric>{row.wins}</Td>
                <Td isNumeric>{row.draws}</Td>
                <Td isNumeric>{row.losses}</Td>
                <Td isNumeric>{row.score}</Td>
                <Td isNumeric>{row.points}</Td>
              </Tr>
            ))}
            {tableRows.length === 0 && (
              <Tr><Td colSpan={8}><Text>Tabulka není dostupná.</Text></Td></Tr>
            )}
          </Tbody>
        </Table>
      )}
    </VStack>
  );
}

export default StandingsPage;