import { useEffect, useState } from "react";
import { Box, Group, Popover, Progress, Stack, Text, UnstyledButton } from "@mantine/core";

import { useI18n } from "@homarr/translation/client";

import type { BeszelSystemRow } from "./types";
import { thresholdColor } from "./colors";
import { formatPercent, getProgressTrackSize } from "./format";
import classes from "./disk-usage.module.css";

interface DiskUsageProps {
  system: BeszelSystemRow;
  fontSize: string;
  progressSize: "xs" | "sm";
  valueMiw: number;
  valueGap?: number;
}

const mountLabel = (path: string) =>
  path === "/" ? "ROOT" : (path.split("/").filter(Boolean).at(-1) ?? path).toUpperCase();
const severityColor = (value: number) => `var(--mantine-color-${thresholdColor(value)}-6)`;

export const DiskUsage = ({ system, fontSize, progressSize, valueMiw, valueGap = 6 }: DiskUsageProps) => {
  const t = useI18n("common");
  const [opened, setOpened] = useState(false);
  const filesystems = Object.entries(system.extraFilesystems).filter(([path]) => path !== "/");
  const filesystemUsageLabel = t("filesystemUsage", { count: filesystems.length + 1 });
  const trackSize = getProgressTrackSize(progressSize);
  const dotSize = progressSize === "xs" ? 2 : 3;
  const dotGap = 2;

  useEffect(() => {
    if (filesystems.length === 0) setOpened(false);
  }, [filesystems.length]);

  return (
    <Group gap={valueGap} wrap="nowrap" style={{ flex: 1, minWidth: 0, marginLeft: "auto" }}>
      <Text size={fontSize} fw={500} w={valueMiw} ta="left" style={{ whiteSpace: "nowrap", flexShrink: 0 }}>
        {formatPercent(system.disk)}
      </Text>
      {filesystems.length > 0 ? (
        <Popover
          opened={opened}
          onChange={setOpened}
          zIndex="var(--homarr-z-index-widget-background-tooltip)"
          position="right"
          withArrow
          shadow="md"
        >
          <Popover.Target>
            <UnstyledButton
              aria-label={filesystemUsageLabel}
              className={classes.target}
              onMouseEnter={() => setOpened(true)}
              onMouseLeave={() => setOpened(false)}
              onBlur={() => setOpened(false)}
              onClick={() => setOpened(true)}
              style={{
                display: "flex",
                alignItems: "center",
                flex: 1,
                cursor: "pointer",
              }}
            >
              <Box pos="relative" style={{ flex: 1, minWidth: 24 }}>
                <Progress value={system.disk} color={thresholdColor(system.disk)} size={trackSize} />
                <Group
                  gap={dotGap}
                  wrap="nowrap"
                  aria-hidden
                  pos="absolute"
                  top="50%"
                  right={Math.max(2, dotGap)}
                  style={{ transform: "translateY(-50%)" }}
                >
                  {filesystems.map(([path, value]) => (
                    <Box
                      key={path}
                      w={dotSize}
                      h={dotSize}
                      style={{
                        borderRadius: "50%",
                        backgroundColor: severityColor(value),
                        boxShadow: "0 0 0 0.5px var(--mantine-color-body)",
                        flex: "0 0 auto",
                      }}
                    />
                  ))}
                </Group>
              </Box>
            </UnstyledButton>
          </Popover.Target>
          <Popover.Dropdown aria-label={filesystemUsageLabel} p={8}>
            <Stack gap={6} miw={145}>
              {[["/", system.disk] as const, ...filesystems].map(([path, value]) => (
                <Stack key={path} gap={1}>
                  <Text size="xs" c="dimmed" fw={500} lh={1.2}>
                    {mountLabel(path)}
                  </Text>
                  <Group gap={8} wrap="nowrap">
                    <Text size="sm" fw={600} miw={48} lh={1.25}>
                      {formatPercent(value)}
                    </Text>
                    <Progress value={value} color={thresholdColor(value)} size="xs" style={{ flex: 1 }} />
                  </Group>
                </Stack>
              ))}
            </Stack>
          </Popover.Dropdown>
        </Popover>
      ) : (
        <Box style={{ display: "flex", alignItems: "center", flex: 1, minWidth: 24 }}>
          <Box pos="relative" style={{ flex: 1, minWidth: 24 }}>
            <Progress value={system.disk} color={thresholdColor(system.disk)} size={trackSize} />
          </Box>
        </Box>
      )}
    </Group>
  );
};