import { StatusMessage } from "@/context/statusbar-context";
import { useAutoFrigateStats } from "@/hooks/use-stats";
import useStatusMessages from "@/hooks/use-status-messages";
import StatusMessageList, {
  StatusMessageItem,
} from "@/components/StatusMessageList";
import {
  Popover,
  PopoverContent,
  PopoverTrigger,
} from "@/components/ui/popover";
import StatusBarNotices from "@/components/health/StatusBarNotices";
import { cn } from "@/lib/utils";
import type { ProfilesApiResponse } from "@/types/profile";
import { getProfileColor } from "@/utils/profileColors";
import { useIsAdmin } from "@/hooks/use-is-admin";
import { useMemo, useState } from "react";
import { useTranslation } from "react-i18next";
import useSWR from "swr";

import { FaCheck } from "react-icons/fa";
import { MdCircle } from "react-icons/md";
import { Link } from "react-router-dom";

export default function Statusbar() {
  const { t } = useTranslation(["views/system"]);
  const isAdmin = useIsAdmin();

  const messages = useStatusMessages();

  const stats = useAutoFrigateStats();

  const cpuPercent = useMemo(() => {
    const systemCpu = stats?.cpu_usages["frigate.full_system"]?.cpu;

    if (!systemCpu || systemCpu == "0.0") {
      return null;
    }

    return parseInt(systemCpu);
  }, [stats]);

  const { data: profilesData } = useSWR<ProfilesApiResponse>("profiles");

  const activeProfile = useMemo(() => {
    if (!profilesData?.active_profile || !profilesData.profiles) return null;
    const info = profilesData.profiles.find(
      (p) => p.name === profilesData.active_profile,
    );
    const allNames = profilesData.profiles.map((p) => p.name).sort();
    return {
      name: profilesData.active_profile,
      friendlyName: info?.friendly_name ?? profilesData.active_profile,
      color: getProfileColor(profilesData.active_profile, allNames),
    };
  }, [profilesData]);

  return (
    <div className="absolute bottom-0 left-0 right-0 z-10 flex h-8 w-full items-center justify-between border-t border-secondary-highlight bg-background_alt px-4 dark:text-secondary-foreground">
      <div className="flex h-full items-center gap-2">
        {cpuPercent && (
          <Link to="/system#general">
            <div className="flex cursor-pointer items-center gap-2 text-sm hover:underline">
              <MdCircle
                className={`size-2 ${
                  cpuPercent < 50
                    ? "text-success"
                    : cpuPercent < 80
                      ? "text-orange-400"
                      : "text-danger"
                }`}
              />
              CPU {cpuPercent}%
            </div>
          </Link>
        )}
        {Object.entries(stats?.gpu_usages || {}).map(([name, stats]) => {
          if (name == "error-gpu") {
            return;
          }

          let gpuTitle;
          switch (name) {
            case "amd-vaapi":
              gpuTitle = "AMD GPU";
              break;
            case "intel-gpu":
              gpuTitle = "Intel GPU";
              break;
            case "rockchip":
              gpuTitle = "Rockchip GPU";
              break;
            default:
              gpuTitle = name;
              break;
          }

          const gpu = parseInt(stats.gpu);

          if (isNaN(gpu)) {
            return;
          }

          return (
            <Link key={name} to="/system#general">
              {" "}
              <div
                key={name}
                className="flex cursor-pointer items-center gap-2 text-sm hover:underline"
              >
                <MdCircle
                  className={`size-2 ${
                    gpu < 50
                      ? "text-success"
                      : gpu < 80
                        ? "text-orange-400"
                        : "text-danger"
                  }`}
                />
                {gpuTitle} {gpu}%
              </div>
            </Link>
          );
        })}
        {activeProfile &&
          (isAdmin ? (
            <Link to="/settings?page=profiles">
              <div className="flex cursor-pointer items-center gap-2 text-sm hover:underline">
                <span
                  className={cn(
                    "size-2 shrink-0 rounded-full",
                    activeProfile.color.dot,
                  )}
                />
                <span className="max-w-[150px] truncate">
                  {activeProfile.friendlyName}
                </span>
              </div>
            </Link>
          ) : (
            <div className="flex items-center gap-2 text-sm">
              <span
                className={cn(
                  "size-2 shrink-0 rounded-full",
                  activeProfile.color.dot,
                )}
              />
              <span className="max-w-[150px] truncate">
                {activeProfile.friendlyName}
              </span>
            </div>
          ))}
      </div>
      <div className="no-scrollbar flex h-full max-w-[50%] items-center gap-2 overflow-x-auto">
        {!isAdmin ? null : messages.length === 0 ? (
          <Link to="/system#health" className="flex items-center gap-2 text-sm">
            <FaCheck className="size-3 text-green-500" />
            {t("stats.healthy")}
          </Link>
        ) : messages.length === 1 ? (
          <StatusMessageItem
            message={messages[0]}
            className="whitespace-nowrap"
          />
        ) : (
          <StatusMessagesPopover messages={messages} />
        )}
        {isAdmin && <StatusBarNotices />}
      </div>
    </div>
  );
}

type StatusMessagesPopoverProps = {
  messages: StatusMessage[];
};

/** The most severe message and a count of the rest, which open the full list. */
function StatusMessagesPopover({ messages }: StatusMessagesPopoverProps) {
  const { t } = useTranslation(["views/system"]);
  const [open, setOpen] = useState(false);
  const [first, ...rest] = messages;

  return (
    <Popover open={open} onOpenChange={setOpen}>
      <PopoverTrigger asChild>
        <button
          type="button"
          className="flex items-center gap-2 text-sm hover:underline"
        >
          <StatusMessageItem
            message={{ ...first, link: undefined }}
            className="whitespace-nowrap"
          />
          <span className="shrink-0 rounded-full bg-secondary px-1.5 text-xs text-secondary-foreground">
            {t("stats.moreMessages", { count: rest.length })}
          </span>
        </button>
      </PopoverTrigger>
      <PopoverContent side="top" align="end" className="w-auto max-w-md">
        <StatusMessageList
          messages={messages}
          onNavigate={() => setOpen(false)}
        />
      </PopoverContent>
    </Popover>
  );
}