<template>
	<div>
		<MkLoading v-if="fetching" />
		<div v-show="!fetching" :class="$style.root">
			<div class="charts _panel">
				<div class="chart">
					<canvas ref="chartEl2"></canvas>
				</div>
				<div class="chart">
					<canvas ref="chartEl"></canvas>
				</div>
			</div>
		</div>
	</div>
</template>

<script lang="ts" setup>
import { onMounted, onUnmounted, ref } from "vue";
import { Chart } from "chart.js";
import gradient from "chartjs-plugin-gradient";
import tinycolor from "tinycolor2";
import MkMiniChart from "@/components/MkMiniChart.vue";
import * as os from "@/os";
import number from "@/filters/number";
import MkNumberDiff from "@/components/MkNumberDiff.vue";
import { i18n } from "@/i18n";
import { useChartTooltip } from "@/scripts/use-chart-tooltip";
import { chartVLine } from "@/scripts/chart-vline";
import { defaultStore } from "@/store";
import { alpha } from "@/scripts/color";
import { initChart } from "@/scripts/init-chart";

initChart();

const chartLimit = 50;
const chartEl = $shallowRef<HTMLCanvasElement>();
const chartEl2 = $shallowRef<HTMLCanvasElement>();
let fetching = $ref(true);

const { handler: externalTooltipHandler } = useChartTooltip();
const { handler: externalTooltipHandler2 } = useChartTooltip();

onMounted(async () => {
	const now = new Date();

	const getDate = (ago: number) => {
		const y = now.getFullYear();
		const m = now.getMonth();
		const d = now.getDate();

		return new Date(y, m, d - ago);
	};

	const format = (arr) => {
		return arr.map((v, i) => ({
			x: getDate(i).getTime(),
			y: v,
		}));
	};

	const formatMinus = (arr) => {
		return arr.map((v, i) => ({
			x: getDate(i).getTime(),
			y: -v,
		}));
	};

	const raw = await os.api("charts/ap-request", {
		limit: chartLimit,
		span: "day",
	});

	const vLineColor = defaultStore.state.darkMode
		? "rgba(255, 255, 255, 0.2)"
		: "rgba(0, 0, 0, 0.2)";
	const succColor = "#9ccfd8";
	const failColor = "#f6c177";

	const succMax = Math.max(...raw.deliverSucceeded);
	const failMax = Math.max(...raw.deliverFailed);

	new Chart(chartEl, {
		type: "line",
		data: {
			datasets: [
				{
					stack: "a",
					parsing: false,
					label: "Out: Succ",
					data: format(raw.deliverSucceeded).slice().reverse(),
					tension: 0.3,
					pointRadius: 0,
					borderWidth: 2,
					borderColor: succColor,
					borderJoinStyle: "round",
					borderRadius: 4,
					backgroundColor: alpha(succColor, 0.35),
					fill: true,
					clip: 8,
				},
				{
					stack: "a",
					parsing: false,
					label: "Out: Fail",
					data: formatMinus(raw.deliverFailed).slice().reverse(),
					tension: 0.3,
					pointRadius: 0,
					borderWidth: 2,
					borderColor: failColor,
					borderJoinStyle: "round",
					borderRadius: 4,
					backgroundColor: alpha(failColor, 0.35),
					fill: true,
					clip: 8,
				},
			],
		},
		options: {
			aspectRatio: 2.5,
			layout: {
				padding: {
					left: 0,
					right: 8,
					top: 0,
					bottom: 0,
				},
			},
			scales: {
				x: {
					type: "time",
					stacked: true,
					offset: false,
					time: {
						stepSize: 1,
						unit: "day",
					},
					grid: {
						display: true,
					},
					ticks: {
						display: true,
						maxRotation: 0,
						autoSkipPadding: 16,
					},
					min: getDate(chartLimit).getTime(),
				},
				y: {
					stacked: true,
					position: "left",
					suggestedMax: 10,
					grid: {
						display: true,
					},
					ticks: {
						display: true,
						//mirror: true,
						callback: (value, index, values) =>
							value < 0 ? -value : value,
					},
				},
			},
			interaction: {
				intersect: false,
				mode: "index",
			},
			elements: {
				point: {
					hoverRadius: 5,
					hoverBorderWidth: 2,
				},
			},
			plugins: {
				legend: {
					display: false,
				},
				tooltip: {
					enabled: false,
					mode: "index",
					animation: {
						duration: 0,
					},
					external: externalTooltipHandler,
				},
				gradient,
			},
		},
		plugins: [chartVLine(vLineColor)],
	});

	new Chart(chartEl2, {
		type: "bar",
		data: {
			datasets: [
				{
					parsing: false,
					label: "In",
					data: format(raw.inboxReceived).slice().reverse(),
					tension: 0.3,
					pointRadius: 0,
					borderWidth: 0,
					borderJoinStyle: "round",
					borderRadius: 4,
					backgroundColor: "#c4a7e7",
					barPercentage: 0.8,
					categoryPercentage: 0.9,
					fill: true,
					clip: 8,
				},
			],
		},
		options: {
			aspectRatio: 5,
			layout: {
				padding: {
					left: 0,
					right: 8,
					top: 0,
					bottom: 0,
				},
			},
			scales: {
				x: {
					type: "time",
					offset: false,
					time: {
						stepSize: 1,
						unit: "day",
						displayFormats: {
							day: "M/d",
							month: "Y/M",
						},
					},
					grid: {
						display: false,
					},
					ticks: {
						display: false,
						maxRotation: 0,
						autoSkipPadding: 16,
					},
					min: getDate(chartLimit).getTime(),
				},
				y: {
					position: "left",
					suggestedMax: 10,
					grid: {
						display: true,
					},
				},
			},
			interaction: {
				intersect: false,
				mode: "index",
			},
			elements: {
				point: {
					hoverRadius: 5,
					hoverBorderWidth: 2,
				},
			},
			plugins: {
				legend: {
					display: false,
				},
				tooltip: {
					enabled: false,
					mode: "index",
					animation: {
						duration: 0,
					},
					external: externalTooltipHandler2,
				},
				gradient,
			},
		},
		plugins: [chartVLine(vLineColor)],
	});

	fetching = false;
});
</script>

<style lang="scss" module>
.root {
	&:global {
		> .charts {
			> .chart {
				padding: 16px;

				&:first-child {
					border-bottom: solid 0.5px var(--divider);
				}
			}
		}
	}
}
</style>
