import { Stack, Text, TextInput, Box, Paper, Group, Divider, Center, ActionIcon, Badge } from "@mantine/core";
import { useState, useMemo } from "react";
import { MagnifyingGlassIcon, XIcon, ArrowRightIcon } from "@phosphor-icons/react";
import { useAllPlayerStats } from "../queries";
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 [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 player1Name = useMemo(() => {
    if (!player1Id || !allPlayerStats) return "";
    return allPlayerStats.find((p) => p.player_id === player1Id)?.player_name || "";
  }, [player1Id, allPlayerStats]);

  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) => {
        if (player1Id && stat.player_id === player1Id) return false;
        if (player2Id && stat.player_id === player2Id) return false;
        return true;
      })
      .filter((stat) =>
        stat.player_name.toLowerCase().includes(search.toLowerCase())
      )
      .sort((a, b) => b.matches - a.matches);
  }, [allPlayerStats, player1Id, player2Id, search]);

  const handlePlayerClick = (playerId: string) => {
    if (!player1Id) {
      setPlayer1Id(playerId);
    } else if (!player2Id) {
      setPlayer2Id(playerId);
      h2hSheet.open();
    }
  };

  const handleClearPlayer1 = () => {
    setPlayer1Id(null);
    if (player2Id) {
      setPlayer1Id(player2Id);
      setPlayer2Id(null);
    }
  };

  const handleClearPlayer2 = () => {
    setPlayer2Id(null);
  };

  const activeStep = !player1Id ? 1 : !player2Id ? 2 : 0;

  return (
    <>
      <Stack gap="md">
        <Paper px="md" pt="md" pb="sm" withBorder shadow="sm">
          <Stack gap="xs">
            <Group gap="xs" wrap="nowrap">
              <Paper
                p="sm"
                withBorder
                style={{
                  flex: 1,
                  minHeight: 70,
                  display: "flex",
                  alignItems: "center",
                  justifyContent: "center",
                  position: "relative",
                  borderWidth: 2,
                  borderColor: activeStep === 1 ? "var(--mantine-primary-color-filled)" : undefined,
                  backgroundColor: player1Id && activeStep !== 1 ? "var(--mantine-color-default-hover)" : undefined,
                  cursor: player1Id && activeStep === 0 ? "pointer" : undefined,
                  transition: "all 150ms ease",
                }}
                onClick={player1Id && activeStep === 0 ? handleClearPlayer1 : undefined}
              >
                {player1Id ? (
                  <>
                    <Stack gap={4} align="center" style={{ flex: 1 }}>
                      <PlayerAvatar name={player1Name} size={36} disableFullscreen />
                      <Text size="xs" fw={600} ta="center" lineClamp={1}>
                        {player1Name}
                      </Text>
                    </Stack>
                    <ActionIcon
                      variant="light"
                      color="gray"
                      size="xs"
                      radius="xl"
                      onClick={(e) => {
                        e.stopPropagation();
                        handleClearPlayer1();
                      }}
                      style={{ position: "absolute", top: 4, right: 4 }}
                    >
                      <XIcon size={10} />
                    </ActionIcon>
                  </>
                ) : (
                  <Stack gap={4} align="center">
                    <PlayerAvatar size={36} disableFullscreen />
                    <Text size="xs" c="dimmed" fw={500}>
                      Player 1
                    </Text>
                  </Stack>
                )}
              </Paper>

              <Center>
                <Text size="xl" fw={700} c="dimmed">
                  VS
                </Text>
              </Center>

              <Paper
                p="sm"
                withBorder
                style={{
                  flex: 1,
                  minHeight: 70,
                  display: "flex",
                  alignItems: "center",
                  justifyContent: "center",
                  position: "relative",
                  borderWidth: 2,
                  borderColor: activeStep === 2 ? "var(--mantine-primary-color-filled)" : undefined,
                  backgroundColor: player2Id && activeStep !== 2 ? "var(--mantine-color-default-hover)" : undefined,
                  cursor: player2Id && activeStep === 0 ? "pointer" : undefined,
                  transition: "all 150ms ease",
                }}
                onClick={player2Id && activeStep === 0 ? handleClearPlayer2 : undefined}
              >
                {player2Id ? (
                  <>
                    <Stack gap={4} align="center" style={{ flex: 1 }}>
                      <PlayerAvatar name={player2Name} size={36} disableFullscreen />
                      <Text size="xs" fw={600} ta="center" lineClamp={1}>
                        {player2Name}
                      </Text>
                    </Stack>
                    <ActionIcon
                      variant="light"
                      color="gray"
                      size="xs"
                      radius="xl"
                      onClick={(e) => {
                        e.stopPropagation();
                        handleClearPlayer2();
                      }}
                      style={{ position: "absolute", top: 4, right: 4 }}
                    >
                      <XIcon size={10} />
                    </ActionIcon>
                  </>
                ) : (
                  <Stack gap={4} align="center">
                    <PlayerAvatar size={36} disableFullscreen />
                    <Text size="xs" c="dimmed" fw={500}>
                      Player 2
                    </Text>
                  </Stack>
                )}
              </Paper>
            </Group>

            {activeStep > 0 ? (
              <Badge
                variant="light"
                size="sm"
                radius="sm"
                fullWidth
                styles={{ label: { textTransform: "none" } }}
              >
                {activeStep === 1 && "Select first player"}
                {activeStep === 2 && "Select second player"}
              </Badge>
            ) : (
              <Group justify="center">
                <Text
                  size="xs"
                  c="dimmed"
                  style={{ cursor: "pointer" }}
                  onClick={() => {
                    setPlayer1Id(null);
                    setPlayer2Id(null);
                  }}
                  td="underline"
                >
                  Clear both players
                </Text>
              </Group>
            )}
          </Stack>
        </Paper>

        <TextInput
          placeholder="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 ? `No players found matching "${search}"` : "No players available"}
              </Text>
            )}

            {filteredPlayers.map((player, index) => (
              <Box key={player.player_id}>
                <Group
                  p="md"
                  gap="sm"
                  wrap="nowrap"
                  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">
                    <ArrowRightIcon size={18} />
                  </ActionIcon>
                </Group>
                {index < filteredPlayers.length - 1 && <Divider />}
              </Box>
            ))}
          </Paper>
        </Box>
      </Stack>

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

export default LeagueHeadToHead;