<template>
	<div class="lcfyofjk">
		<svg :viewBox="`0 0 ${viewBoxX} ${viewBoxY}`">
			<defs>
				<linearGradient :id="cpuGradientId" x1="0" x2="0" y1="1" y2="0">
					<stop offset="0%" stop-color="hsl(189, 43%, 73%)"></stop>
					<stop offset="100%" stop-color="hsl(343, 76%, 68%)"></stop>
				</linearGradient>
				<mask
					:id="cpuMaskId"
					x="0"
					y="0"
					:width="viewBoxX"
					:height="viewBoxY"
				>
					<polygon
						:points="cpuPolygonPoints"
						fill="#fff"
						fill-opacity="0.5"
					/>
					<polyline
						:points="cpuPolylinePoints"
						fill="none"
						stroke="#fff"
						stroke-width="1"
					/>
					<circle :cx="cpuHeadX" :cy="cpuHeadY" r="1.5" fill="#fff" />
				</mask>
			</defs>
			<rect
				x="-2"
				y="-2"
				:width="viewBoxX + 4"
				:height="viewBoxY + 4"
				:style="`stroke: none; fill: url(#${cpuGradientId}); mask: url(#${cpuMaskId})`"
			/>
			<text x="1" y="5">
				CPU
				<tspan>{{ cpuP }}%</tspan>
			</text>
		</svg>
		<svg :viewBox="`0 0 ${viewBoxX} ${viewBoxY}`">
			<defs>
				<linearGradient :id="memGradientId" x1="0" x2="0" y1="1" y2="0">
					<stop offset="0%" stop-color="hsl(189, 43%, 73%)"></stop>
					<stop offset="100%" stop-color="hsl(343, 76%, 68%)"></stop>
				</linearGradient>
				<mask
					:id="memMaskId"
					x="0"
					y="0"
					:width="viewBoxX"
					:height="viewBoxY"
				>
					<polygon
						:points="memPolygonPoints"
						fill="#fff"
						fill-opacity="0.5"
					/>
					<polyline
						:points="memPolylinePoints"
						fill="none"
						stroke="#fff"
						stroke-width="1"
					/>
					<circle :cx="memHeadX" :cy="memHeadY" r="1.5" fill="#fff" />
				</mask>
			</defs>
			<rect
				x="-2"
				y="-2"
				:width="viewBoxX + 4"
				:height="viewBoxY + 4"
				:style="`stroke: none; fill: url(#${memGradientId}); mask: url(#${memMaskId})`"
			/>
			<text x="1" y="5">
				MEM
				<tspan>{{ memP }}%</tspan>
			</text>
		</svg>
	</div>
</template>

<script lang="ts" setup>
import { onBeforeUnmount, onMounted } from "vue";
import { v4 as uuid } from "uuid";

const props = defineProps<{
	connection: any;
	meta: any;
}>();

const viewBoxX: number = $ref(50);
const viewBoxY: number = $ref(30);
const stats: any[] = $ref([]);
const cpuGradientId = uuid();
const cpuMaskId = uuid();
const memGradientId = uuid();
const memMaskId = uuid();
let cpuPolylinePoints: string = $ref(""),
	memPolylinePoints: string = $ref(""),
	cpuPolygonPoints: string = $ref(""),
	memPolygonPoints: string = $ref(""),
	cpuHeadX: any = $ref(null),
	cpuHeadY: any = $ref(null),
	memHeadX: any = $ref(null),
	memHeadY: any = $ref(null),
	cpuP: string = $ref(""),
	memP: string = $ref("");

onMounted(() => {
	props.connection.on("stats", onStats);
	props.connection.on("statsLog", onStatsLog);
	props.connection.send("requestLog", {
		id: Math.random().toString().substr(2, 8),
	});
});

onBeforeUnmount(() => {
	props.connection.off("stats", onStats);
	props.connection.off("statsLog", onStatsLog);
});

function onStats(connStats) {
	stats.push(connStats);
	if (stats.length > 50) stats.shift();

	const cpuPolylinePointsStats = stats.map((s, i) => [
		viewBoxX - (stats.length - 1 - i),
		(1 - s.cpu) * viewBoxY,
	]);
	const memPolylinePointsStats = stats.map((s, i) => [
		viewBoxX - (stats.length - 1 - i),
		(1 - s.mem.active / s.mem.total) * viewBoxY,
	]);
	cpuPolylinePoints = cpuPolylinePointsStats
		.map((xy) => `${xy[0]},${xy[1]}`)
		.join(" ");
	memPolylinePoints = memPolylinePointsStats
		.map((xy) => `${xy[0]},${xy[1]}`)
		.join(" ");

	cpuPolygonPoints = `${
		viewBoxX - (stats.length - 1)
	},${viewBoxY} ${cpuPolylinePoints} ${viewBoxX},${viewBoxY}`;
	memPolygonPoints = `${
		viewBoxX - (stats.length - 1)
	},${viewBoxY} ${memPolylinePoints} ${viewBoxX},${viewBoxY}`;

	cpuHeadX = cpuPolylinePointsStats[cpuPolylinePointsStats.length - 1][0];
	cpuHeadY = cpuPolylinePointsStats[cpuPolylinePointsStats.length - 1][1];
	memHeadX = memPolylinePointsStats[memPolylinePointsStats.length - 1][0];
	memHeadY = memPolylinePointsStats[memPolylinePointsStats.length - 1][1];

	cpuP = (connStats.cpu * 100).toFixed(0);
	memP = ((connStats.mem.active / connStats.mem.total) * 100).toFixed(0);
}

function onStatsLog(statsLog) {
	for (const revStats of [...statsLog].reverse()) {
		onStats(revStats);
	}
}
</script>

<style lang="scss" scoped>
.lcfyofjk {
	display: flex;

	> svg {
		display: block;
		padding: 10px;
		width: 50%;

		&:first-child {
			padding-right: 5px;
		}

		&:last-child {
			padding-left: 5px;
		}

		> text {
			font-size: 5px;
			fill: currentColor;

			> tspan {
				opacity: 0.5;
			}
		}
	}
}
</style>
