import { Stack, Text, TextInput, Box, Paper, Group, Divider, ActionIcon, Button } from "@mantine/core";
import { useState, useMemo } from "react";
import { MagnifyingGlassIcon, XIcon, ArrowRightIcon, PlusIcon } from "@phosphor-icons/react";
import { Trans, useLingui } from "@lingui/react/macro";
import { useAllPlayerStats } from "../queries";
import { useAuth } from "@/contexts/auth-context";
import { useSheet } from "@/hooks/use-sheet";
import Sheet from "@/components/sheet/sheet";
import PlayerHeadToHeadSheet from "./player-head-to-head-sheet";
import PlayerAvatar from "@/components/player-avatar";

const LeagueHeadToHead = () => {
  const { t } = useLingui();
  const { user } = useAuth();
  const [player1Id, setPlayer1Id] = useState<string | null>(null);
  const [player2Id, setPlayer2Id] = useState<string | null>(null);
  const [search, setSearch] = useState("");
  const { data: allPlayerStats } = useAllPlayerStats();
  const h2hSheet = useSheet();

  const myName = useMemo(() => {
    if (!user) return "";
    const fromStats = allPlayerStats?.find((p) => p.player_id === user.id)?.player_name;
    return fromStats || [user.first_name, user.last_name].filter(Boolean).join(" ");
  }, [user, allPlayerStats]);

  const player1Name = useMemo(() => {
    if (!player1Id) return "";
    if (user && player1Id === user.id) return myName;
    return allPlayerStats?.find((p) => p.player_id === player1Id)?.player_name || "";
  }, [player1Id, allPlayerStats, user, myName]);

  const player2Name = useMemo(() => {
    if (!player2Id || !allPlayerStats) return "";
    return allPlayerStats.find((p) => p.player_id === player2Id)?.player_name || "";
  }, [player2Id, allPlayerStats]);

  const filteredPlayers = useMemo(() => {
    if (!allPlayerStats) return [];

    return allPlayerStats
      .filter((stat) => stat.player_id !== player1Id)
      .filter((stat) =>
        stat.player_name.toLowerCase().includes(search.toLowerCase())
      )
      .sort((a, b) => b.matches - a.matches);
  }, [allPlayerStats, player1Id, search]);

  const handlePlayerClick = (playerId: string) => {
    if (!player1Id) {
      setPlayer1Id(playerId);
    } else {
      setPlayer2Id(playerId);
      h2hSheet.open();
    }
  };

  const handleClearPlayer1 = () => {
    setPlayer1Id(null);
    setPlayer2Id(null);
  };

  return (
    <>
      <Stack gap="md">
        <Box px="md" pt="md">
          <Paper
            p="sm"
            withBorder
            shadow="sm"
            style={{
              minHeight: 64,
              display: "flex",
              alignItems: "center",
              borderWidth: 2,
              borderColor: !player1Id ? "var(--mantine-primary-color-filled)" : undefined,
              transition: "border-color 150ms ease",
            }}
          >
            {player1Id ? (
              <Group justify="space-between" wrap="nowrap" style={{ flex: 1 }}>
                <Group gap="sm" wrap="nowrap" style={{ minWidth: 0 }}>
                  <PlayerAvatar name={player1Name} size={36} disableFullscreen />
                  <Box style={{ minWidth: 0 }}>
                    <Text size="sm" fw={600} truncate>
                      {player1Name}
                    </Text>
                    <Text size="xs" c="dimmed">
                      <Trans>Tap an opponent below to compare</Trans>
                    </Text>
                  </Box>
                </Group>
                <ActionIcon
                  variant="light"
                  color="gray"
                  size="sm"
                  radius="xl"
                  onClick={handleClearPlayer1}
                  aria-label={t`Clear selected player`}
                >
                  <XIcon size={12} />
                </ActionIcon>
              </Group>
            ) : (
              <Group justify="space-between" wrap="nowrap" style={{ flex: 1 }}>
                <Group gap="sm" wrap="nowrap">
                  <PlayerAvatar size={36} disableFullscreen />
                  <Text size="sm" c="dimmed" fw={500}>
                    <Trans>Select a player</Trans>
                  </Text>
                </Group>
                {user && (
                  <Button
                    variant="light"
                    size="xs"
                    radius="xl"
                    leftSection={<PlusIcon size={12} />}
                    onClick={() => setPlayer1Id(user.id)}
                  >
                    <Trans>Me</Trans>
                  </Button>
                )}
              </Group>
            )}
          </Paper>
        </Box>

        <TextInput
          placeholder={t`Search players`}
          value={search}
          onChange={(e) => setSearch(e.currentTarget.value)}
          leftSection={<MagnifyingGlassIcon size={16} />}
          size="md"
          px="md"
        />

        <Box px="md" pb="md">
          <Paper withBorder>
            {filteredPlayers.length === 0 && (
              <Text size="sm" c="dimmed" ta="center" py="xl">
                {search ? t`No players found matching "${search}"` : t`No players available`}
              </Text>
            )}

            {filteredPlayers.map((player, index) => (
              <Box key={player.player_id}>
                <Group
                  p="md"
                  gap="sm"
                  wrap="nowrap"
                  className="flxn-press"
                  style={{
                    cursor: "pointer",
                    transition: "background-color 150ms ease",
                  }}
                  onClick={() => handlePlayerClick(player.player_id)}
                  styles={{
                    root: {
                      "&:hover": {
                        backgroundColor: "var(--mantine-color-default-hover)",
                      },
                    },
                  }}
                >
                  <PlayerAvatar name={player.player_name} size={44} disableFullscreen />
                  <Box style={{ flex: 1, minWidth: 0 }}>
                    <Text size="sm" fw={600} truncate>
                      {player.player_name}
                    </Text>
                  </Box>
                  <ActionIcon variant="subtle" color="gray" size="lg" radius="xl">
                    {player1Id ? <ArrowRightIcon size={18} /> : <PlusIcon size={18} />}
                  </ActionIcon>
                </Group>
                {index < filteredPlayers.length - 1 && <Divider />}
              </Box>
            ))}
          </Paper>
        </Box>
      </Stack>

      {player1Id && player2Id && (
        <Sheet title={t`Head to Head`} {...h2hSheet.props}>
          <PlayerHeadToHeadSheet
            player1Id={player1Id}
            player1Name={player1Name}
            player2Id={player2Id}
            player2Name={player2Name}
            isOpen={h2hSheet.props.opened}
          />
        </Sheet>
      )}
    </>
  );
};

export default LeagueHeadToHead;