From 212c3adc8a584e6517a2816fc6683688d5ac5d7a Mon Sep 17 00:00:00 2001
From: Martin Kagamino Lehoux <martin@lehoux.net>
Date: Tue, 8 Sep 2026 13:44:59 +0200
Subject: Project health chart on LayerChart

Project page gets a Sante chart: daily mean of per-routine health
via computeProjectHealthSeries, ending at the current health score.
Both charts share a HealthChart component built on LayerChart's
AreaChart (time x-axis, fixed 0-100 y-axis, completion dots).
---
 src/lib/components/HealthChart.svelte | 110 ++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 src/lib/components/HealthChart.svelte

(limited to 'src/lib/components/HealthChart.svelte')

diff --git a/src/lib/components/HealthChart.svelte b/src/lib/components/HealthChart.svelte
new file mode 100644
index 0000000..f1f87ed
--- /dev/null
+++ b/src/lib/components/HealthChart.svelte
@@ -0,0 +1,110 @@
+<script lang="ts">
+	import { AreaChart, Area, Points, Text } from 'layerchart';
+	import type { HealthPoint } from '$lib/shared/routine-metrics';
+
+	let {
+		series,
+		markers = [],
+		ariaLabel,
+	}: {
+		series: HealthPoint[];
+		markers?: number[];
+		ariaLabel: string;
+	} = $props();
+
+	const dateFormatter = new Intl.DateTimeFormat('fr-FR', {
+		day: 'numeric',
+		month: 'short',
+	});
+
+	const data = $derived(
+		series.map((p) => ({ date: new Date(p.at), health: p.health })),
+	);
+	const dots = $derived(
+		markers.map((t) => ({ date: new Date(t), health: 100 })),
+	);
+
+	// Up to 5 x ticks spread across the series, skipping repeats (two samples
+	// the same day would print the same label twice).
+	const xTicks = $derived.by(() => {
+		if (data.length < 2) return undefined;
+		const step = Math.max(1, Math.floor((data.length - 1) / 4));
+		const ticks: Date[] = [];
+		for (let i = 0; i < data.length; i += step) {
+			const last = i + step >= data.length;
+			const date = last ? data[data.length - 1].date : data[i].date;
+			const label = dateFormatter.format(date);
+			if (
+				ticks.length > 0 &&
+				dateFormatter.format(ticks[ticks.length - 1]) === label
+			)
+				continue;
+			ticks.push(date);
+			if (last) break;
+		}
+		return ticks;
+	});
+</script>
+
+{#if data.length >= 2}
+	<div class="health-chart" role="img" aria-label={ariaLabel}>
+		<AreaChart
+			{data}
+			x="date"
+			y="health"
+			yDomain={[0, 100]}
+			series={[{ key: 'santé', value: 'health', color: 'var(--accent)' }]}
+			axis
+			grid={{ y: true, yTicks: [25, 50, 75, 100] }}
+			rule={false}
+			props={{
+				xAxis: {
+					ticks: xTicks,
+					format: (d: Date) => dateFormatter.format(d),
+					tickLabel: xTickLabel,
+				},
+				yAxis: { ticks: [25, 50, 75, 100] },
+			}}
+			marks={chartMarks}
+		/>
+	</div>
+{:else}
+	<p class="empty">Pas encore assez d'historique pour tracer la courbe.</p>
+{/if}
+
+{#snippet xTickLabel({
+	props,
+	index,
+}: {
+	props: Record<string, unknown>;
+	index: number;
+})}
+	<Text
+		{...props}
+		textAnchor={index === 0
+			? 'start'
+			: index === (xTicks?.length ?? 0) - 1
+				? 'end'
+				: 'middle'}
+	/>
+{/snippet}
+
+{#snippet chartMarks()}
+	<Area seriesKey="santé" fillOpacity={0.2} line={{ strokeWidth: 2 }} />
+	<Points
+		data={dots}
+		x="date"
+		y="health"
+		r={4}
+		fill="var(--success)"
+		stroke="var(--white)"
+		strokeWidth={1.5}
+	/>
+{/snippet}
+
+<style>
+	.health-chart {
+		width: 100%;
+		height: 11rem;
+	}
+</style>
-- 
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