athlete page first draft

site/src/components/MmpChart.svelte

@@ -0,0 +1,199 @@
+<script lang="ts">
+  import { onMount } from 'svelte';
+  import * as Plot from '@observablehq/plot';
+  import type { AthleteJson, MmpCurve, ActivitySummary } from '../lib/types';
+
+  export let athlete: AthleteJson;
+  export let activities: ActivitySummary[] = [];
+
+  // ── Range selection ────────────────────────────────────────────────────────
+  type RangeKey = 'all_time' | 'last_365d' | 'last_90d' | string;
+
+  interface Season { name: string; start: string; end: string }
+  const seasons: Season[] = (athlete as any).seasons ?? [];
+
+  let selectedRanges: Set<RangeKey> = new Set(['all_time']);
+
+  const PRESET_LABELS: Record<string, string> = {
+    all_time:   'All time',
+    last_365d:  'Last 365 d',
+    last_90d:   'Last 90 d',
+  };
+
+  // Colours for overlaid curves (cycling through a palette)
+  const PALETTE = [
+    '#60a5fa', // blue-400
+    '#f97316', // orange-500
+    '#34d399', // emerald-400
+    '#a78bfa', // violet-400
+    '#f43f5e', // rose-500
+    '#facc15', // yellow-400
+    '#22d3ee', // cyan-400
+  ];
+
+  function curveColor(key: RangeKey, index: number): string {
+    return PALETTE[index % PALETTE.length];
+  }
+
+  // ── MMP curve computation ──────────────────────────────────────────────────
+
+  function mergeMmps(mmps: MmpCurve[]): MmpCurve {
+    const best = new Map<number, number>();
+    for (const curve of mmps) {
+      for (const [d, w] of curve) {
+        const prev = best.get(d);
+        if (prev === undefined || w > prev) best.set(d, w);
+      }
+    }
+    return [...best.entries()].sort((a, b) => a[0] - b[0]) as MmpCurve;
+  }
+
+  function mmpsForRange(key: RangeKey): MmpCurve | null {
+    // Built-in preset ranges come from athlete.json (pre-computed at extract time)
+    if (key in PRESET_LABELS) {
+      return (athlete.power_curve as any)[key] ?? null;
+    }
+    // User-defined seasons: compute on-the-fly from per-activity mmp in index.json
+    const season = seasons.find(s => s.name === key);
+    if (!season) return null;
+    const curves = activities
+      .filter(a => a.mmp && a.started_at >= season.start && a.started_at <= season.end + 'T23:59:59')
+      .map(a => a.mmp!);
+    return curves.length ? mergeMmps(curves) : null;
+  }
+
+  // ── Chart rendering ────────────────────────────────────────────────────────
+
+  let chartEl: HTMLElement;
+
+  function formatDuration(s: number): string {
+    if (s < 60)   return `${s}s`;
+    if (s < 3600) return `${Math.round(s / 60)}min`;
+    return `${s / 3600}h`;
+  }
+
+  $: selectedKeys = [...selectedRanges];
+
+  $: plotData = selectedKeys.flatMap((key, i) => {
+    const curve = mmpsForRange(key);
+    if (!curve) return [];
+    return curve.map(([d, w]) => ({ d, w, label: key }));
+  });
+
+  $: colorMap = Object.fromEntries(selectedKeys.map((k, i) => [k, curveColor(k, i)]));
+
+  function renderChart(data: typeof plotData, cmap: typeof colorMap) {
+    if (!chartEl) return;
+    chartEl.innerHTML = '';
+    if (!data.length) return;
+
+    const labelFn = (key: string) =>
+      PRESET_LABELS[key] ?? key;
+
+    const chart = Plot.plot({
+      width: chartEl.clientWidth || 700,
+      height: 320,
+      marginLeft: 52,
+      marginBottom: 40,
+      style: { background: 'transparent', color: '#e4e4e7' },
+      x: {
+        type: 'log',
+        label: 'Duration',
+        tickFormat: (d: number) => formatDuration(d),
+        grid: true,
+      },
+      y: {
+        label: 'Avg power (W)',
+        grid: true,
+      },
+      color: {
+        domain: selectedKeys,
+        range: selectedKeys.map((k, i) => curveColor(k, i)),
+        legend: selectedKeys.length > 1,
+      },
+      marks: [
+        Plot.line(data, {
+          x: 'd',
+          y: 'w',
+          stroke: 'label',
+          strokeWidth: 2,
+          curve: 'monotone-x',
+        }),
+        Plot.dot(data, {
+          x: 'd',
+          y: 'w',
+          fill: 'label',
+          r: 3,
+          tip: true,
+          title: (d: any) => `${labelFn(d.label)}\n${formatDuration(d.d)}: ${d.w} W`,
+        }),
+        ...(athlete.ftp_w ? [
+          Plot.ruleY([athlete.ftp_w], {
+            stroke: '#71717a',
+            strokeDasharray: '4 3',
+          }),
+          Plot.text([{ x: 3600, y: athlete.ftp_w }], {
+            x: 'x', y: 'y',
+            text: () => `FTP ${athlete.ftp_w} W`,
+            fill: '#71717a',
+            fontSize: 11,
+            dy: -6,
+            textAnchor: 'end',
+          }),
+        ] : []),
+      ],
+    });
+
+    chartEl.appendChild(chart);
+  }
+
+  $: renderChart(plotData, colorMap);
+
+  // Re-render on resize
+  onMount(() => {
+    const ro = new ResizeObserver(() => renderChart(plotData, colorMap));
+    ro.observe(chartEl);
+    return () => ro.disconnect();
+  });
+
+  // ── Toggle helpers ─────────────────────────────────────────────────────────
+
+  function toggleRange(key: RangeKey) {
+    const next = new Set(selectedRanges);
+    if (next.has(key)) {
+      if (next.size > 1) next.delete(key); // always keep at least one
+    } else {
+      next.add(key);
+    }
+    selectedRanges = next;
+  }
+
+  const allRangeKeys = [
+    ...Object.keys(PRESET_LABELS),
+    ...seasons.map(s => s.name),
+  ];
+</script>
+
+<!-- Range selector pills -->
+<div class="flex flex-wrap gap-2 mb-4">
+  {#each allRangeKeys as key, i}
+    {@const active = selectedRanges.has(key)}
+    {@const color = curveColor(key, i)}
+    <button
+      on:click={() => toggleRange(key)}
+      class="px-3 py-1 rounded-full text-sm font-medium border transition-colors"
+      style={active
+        ? `background:${color}22; border-color:${color}; color:${color}`
+        : 'background:transparent; border-color:#3f3f46; color:#71717a'}
+    >
+      {PRESET_LABELS[key] ?? key}
+    </button>
+  {/each}
+</div>
+
+<!-- Chart -->
+<div bind:this={chartEl} class="w-full min-h-[320px]"></div>
+
+{#if !plotData.length}
+  <p class="text-zinc-500 text-sm mt-4">No power data for the selected range.</p>
+{/if}