import { Suspense, lazy, useEffect, useMemo } from "react"
import { Card, CardContent, CardHeader, CardTitle } from "../ui/card"
import { $alerts, $hubVersion, $systems, pb } from "@/lib/stores"
import { useStore } from "@nanostores/react"
import { GithubIcon } from "lucide-react"
import { Separator } from "../ui/separator"
import { alertInfo, updateRecordList, updateSystemList } from "@/lib/utils"
import { AlertRecord, SystemRecord } from "@/types"
import { Alert, AlertDescription, AlertTitle } from "@/components/ui/alert"
import { $router, Link } from "../router"
import { Plural, t, Trans } from "@lingui/macro"
import { getPagePath } from "@nanostores/router"

const SystemsTable = lazy(() => import("../systems-table/systems-table"))

export default function Home() {
	const hubVersion = useStore($hubVersion)

	const alerts = useStore($alerts)
	const systems = useStore($systems)

	const activeAlerts = useMemo(() => {
		const activeAlerts = alerts.filter((alert) => {
			const active = alert.triggered && alert.name in alertInfo
			if (!active) {
				return false
			}
			alert.sysname = systems.find((system) => system.id === alert.system)?.name
			return true
		})
		return activeAlerts
	}, [alerts])

	useEffect(() => {
		document.title = t`Dashboard` + " / Beszel"

		// make sure we have the latest list of systems
		updateSystemList()

		// subscribe to real time updates for systems / alerts
		pb.collection<SystemRecord>("systems").subscribe("*", (e) => {
			updateRecordList(e, $systems)
		})
		// todo: add toast if new triggered alert comes in
		pb.collection<AlertRecord>("alerts").subscribe("*", (e) => {
			updateRecordList(e, $alerts)
		})
		return () => {
			pb.collection("systems").unsubscribe("*")
			// pb.collection('alerts').unsubscribe('*')
		}
	}, [])

	return (
		<>
			{/* show active alerts */}
			{activeAlerts.length > 0 && (
				<Card className="mb-4">
					<CardHeader className="pb-4 px-2 sm:px-6 max-sm:pt-5 max-sm:pb-1">
						<div className="px-2 sm:px-1">
							<CardTitle>
								<Trans>Active Alerts</Trans>
							</CardTitle>
						</div>
					</CardHeader>
					<CardContent className="max-sm:p-2">
						{activeAlerts.length > 0 && (
							<div className="grid sm:grid-cols-2 lg:grid-cols-3 2xl:grid-cols-4 gap-3">
								{activeAlerts.map((alert) => {
									const info = alertInfo[alert.name as keyof typeof alertInfo]
									return (
										<Alert
											key={alert.id}
											className="hover:-translate-y-[1px] duration-200 bg-transparent border-foreground/10  hover:shadow-md shadow-black"
										>
											<info.icon className="h-4 w-4" />
											<AlertTitle>
												{alert.sysname} {info.name().toLowerCase().replace("cpu", "CPU")}
											</AlertTitle>
											<AlertDescription>
												<Trans>
													Exceeds {alert.value}
													{info.unit} in last <Plural value={alert.min} one="# minute" other="# minutes" />
												</Trans>
											</AlertDescription>
											<Link
												href={getPagePath($router, "system", { name: alert.sysname! })}
												className="absolute inset-0 w-full h-full"
												aria-label="View system"
											></Link>
										</Alert>
									)
								})}
							</div>
						)}
					</CardContent>
				</Card>
			)}
			<Suspense>
				<SystemsTable />
			</Suspense>

			{hubVersion && (
				<div className="flex gap-1.5 justify-end items-center pe-3 sm:pe-6 mt-3.5 text-xs opacity-80">
					<a
						href="https://github.com/henrygd/beszel"
						target="_blank"
						className="flex items-center gap-0.5 text-muted-foreground hover:text-foreground duration-75"
					>
						<GithubIcon className="h-3 w-3" /> GitHub
					</a>
					<Separator orientation="vertical" className="h-2.5 bg-muted-foreground opacity-70" />
					<a
						href="https://github.com/henrygd/beszel/releases"
						target="_blank"
						className="text-muted-foreground hover:text-foreground duration-75"
					>
						Beszel {hubVersion}
					</a>
				</div>
			)}
		</>
	)
}