<template>
<div :class="$style.root">
	<MkFoldableSection class="item">
		<template #header>Chart</template>
		<div :class="$style.chart">
			<div class="selects">
				<MkSelect v-model="chartSrc" style="margin: 0; flex: 1;">
					<optgroup :label="i18n.ts.federation">
						<option value="federation">{{ i18n.ts._charts.federation }}</option>
						<option value="ap-request">{{ i18n.ts._charts.apRequest }}</option>
					</optgroup>
					<optgroup :label="i18n.ts.users">
						<option value="users">{{ i18n.ts._charts.usersIncDec }}</option>
						<option value="users-total">{{ i18n.ts._charts.usersTotal }}</option>
						<option value="active-users">{{ i18n.ts._charts.activeUsers }}</option>
					</optgroup>
					<optgroup :label="i18n.ts.notes">
						<option value="notes">{{ i18n.ts._charts.notesIncDec }}</option>
						<option value="local-notes">{{ i18n.ts._charts.localNotesIncDec }}</option>
						<option value="remote-notes">{{ i18n.ts._charts.remoteNotesIncDec }}</option>
						<option value="notes-total">{{ i18n.ts._charts.notesTotal }}</option>
					</optgroup>
					<optgroup :label="i18n.ts.drive">
						<option value="drive-files">{{ i18n.ts._charts.filesIncDec }}</option>
						<option value="drive">{{ i18n.ts._charts.storageUsageIncDec }}</option>
					</optgroup>
				</MkSelect>
				<MkSelect v-model="chartSpan" style="margin: 0 0 0 10px;">
					<option value="hour">{{ i18n.ts.perHour }}</option>
					<option value="day">{{ i18n.ts.perDay }}</option>
				</MkSelect>
			</div>
			<div class="chart _panel">
				<MkChart :src="chartSrc" :span="chartSpan" :limit="chartLimit" :detailed="true"></MkChart>
			</div>
		</div>
	</MkFoldableSection>

	<MkFoldableSection class="item">
		<template #header>Active users heatmap</template>
		<MkSelect v-model="heatmapSrc" style="margin: 0 0 12px 0;">
			<option value="active-users">Active users</option>
			<option value="notes">Notes</option>
			<option value="ap-requests-inbox-received">AP Requests: inboxReceived</option>
			<option value="ap-requests-deliver-succeeded">AP Requests: deliverSucceeded</option>
			<option value="ap-requests-deliver-failed">AP Requests: deliverFailed</option>
		</MkSelect>
		<div class="_panel" :class="$style.heatmap">
			<MkHeatmap :src="heatmapSrc"/>
		</div>
	</MkFoldableSection>

	<MkFoldableSection class="item">
		<template #header>Retention rate</template>
		<div class="_panel" :class="$style.retention">
			<MkRetentionHeatmap/>
		</div>
	</MkFoldableSection>

	<MkFoldableSection class="item">
		<template #header>Federation</template>
		<div :class="$style.federation">
			<div class="pies">
				<div class="sub">
					<div class="title">Sub</div>
					<canvas ref="subDoughnutEl"></canvas>
				</div>
				<div class="pub">
					<div class="title">Pub</div>
					<canvas ref="pubDoughnutEl"></canvas>
				</div>
			</div>
		</div>
	</MkFoldableSection>
</div>
</template>

<script lang="ts" setup>
import { onMounted } from 'vue';
import { Chart } from 'chart.js';
import MkSelect from '@/components/MkSelect.vue';
import MkChart from '@/components/MkChart.vue';
import { useChartTooltip } from '@/scripts/use-chart-tooltip';
import * as os from '@/os';
import { i18n } from '@/i18n';
import MkHeatmap from '@/components/MkHeatmap.vue';
import MkFoldableSection from '@/components/MkFoldableSection.vue';
import MkRetentionHeatmap from '@/components/MkRetentionHeatmap.vue';
import { initChart } from '@/scripts/init-chart';

initChart();

const chartLimit = 500;
let chartSpan = $ref<'hour' | 'day'>('hour');
let chartSrc = $ref('active-users');
let heatmapSrc = $ref('active-users');
let subDoughnutEl = $shallowRef<HTMLCanvasElement>();
let pubDoughnutEl = $shallowRef<HTMLCanvasElement>();

const { handler: externalTooltipHandler1 } = useChartTooltip({
	position: 'middle',
});
const { handler: externalTooltipHandler2 } = useChartTooltip({
	position: 'middle',
});

function createDoughnut(chartEl, tooltip, data) {
	const chartInstance = new Chart(chartEl, {
		type: 'doughnut',
		data: {
			labels: data.map(x => x.name),
			datasets: [{
				backgroundColor: data.map(x => x.color),
				borderColor: getComputedStyle(document.documentElement).getPropertyValue('--panel'),
				borderWidth: 2,
				hoverOffset: 0,
				data: data.map(x => x.value),
			}],
		},
		options: {
			maintainAspectRatio: false,
			layout: {
				padding: {
					left: 16,
					right: 16,
					top: 16,
					bottom: 16,
				},
			},
			onClick: (ev) => {
				const hit = chartInstance.getElementsAtEventForMode(ev, 'nearest', { intersect: true }, false)[0];
				if (hit && data[hit.index].onClick) {
					data[hit.index].onClick();
				}
			},
			plugins: {
				legend: {
					display: false,
				},
				tooltip: {
					enabled: false,
					mode: 'index',
					animation: {
						duration: 0,
					},
					external: tooltip,
				},
			},
		},
	});

	return chartInstance;
}

onMounted(() => {
	os.apiGet('federation/stats', { limit: 30 }).then(fedStats => {
		createDoughnut(subDoughnutEl, externalTooltipHandler1, fedStats.topSubInstances.map(x => ({
			name: x.host,
			color: x.themeColor,
			value: x.followersCount,
			onClick: () => {
				os.pageWindow(`/instance-info/${x.host}`);
			},
		})).concat([{ name: '(other)', color: '#80808080', value: fedStats.otherFollowersCount }]));

		createDoughnut(pubDoughnutEl, externalTooltipHandler2, fedStats.topPubInstances.map(x => ({
			name: x.host,
			color: x.themeColor,
			value: x.followingCount,
			onClick: () => {
				os.pageWindow(`/instance-info/${x.host}`);
			},
		})).concat([{ name: '(other)', color: '#80808080', value: fedStats.otherFollowingCount }]));
	});
});
</script>

<style lang="scss" module>
.root {
	&:global {
		> .item {
			margin-bottom: 16px;
		}
	}
}

.chart {
	&:global {
		> .selects {
			display: flex;
			margin-bottom: 12px;
		}

		> .chart {
			padding: 16px;
		}
	}
}

.heatmap {
	padding: 16px;
	margin-bottom: 16px;
}

.retention {
	padding: 16px;
	margin-bottom: 16px;
}

.federation {
	&:global {
		> .pies {
			display: flex;
			gap: 16px;

			> .sub, > .pub {
				flex: 1;
				min-width: 0;
				position: relative;
				background: var(--panel);
				border-radius: var(--radius);
				padding: 24px;
				max-height: 300px;

				> .title {
					position: absolute;
					top: 24px;
					left: 24px;
				}
			}

			@media (max-width: 600px) {
				flex-direction: column;
			}
		}
	}
}
</style>
