Add Race Hub analytics visuals

frontend/src/components/StrategyView.tsx

@@ -1,16 +1,41 @@
-import type { EnrichedResult } from '../types'
+import type { EnrichedResult, Stint, PitStop } from '../types'
+
+const COMPOUND_COLORS: Record<string, string> = {
+  SOFT: '#e8002d',
+  MEDIUM: '#ffd600',
+  HARD: '#e8e8e4',
+  INTERMEDIATE: '#39b54a',
+  WET: '#0067ff',
+}
+
+function compoundColor(c: string): string {
+  return COMPOUND_COLORS[c.toUpperCase()] ?? '#666'
+}
+
+function compoundInitial(c: string): string {
+  const abbr: Record<string, string> = {
+    SOFT: 'S',
+    MEDIUM: 'M',
+    HARD: 'H',
+    INTERMEDIATE: 'I',
+    WET: 'W',
+  }
+  return abbr[c.toUpperCase()] ?? c[0] ?? '?'
+}
 
 interface Props {
   results: EnrichedResult[]
+  stints: Stint[]
+  pit_stops: PitStop[]
   hasStints: boolean
 }
 
-export function StrategyView({ results, hasStints }: Props) {
+export function StrategyView({ results, stints, pit_stops, hasStints }: Props) {
   if (!hasStints) {
     return (
       <div>
         <div className="analysis-notice">
-          <strong>Stints not available.</strong> The backend does not yet expose
+          <strong>Stints not available.</strong> This session does not have ingested
           tyre compound and stint ranges in <code>/api/v1/race-hub</code>. Strategy
           charts require per-driver stints: compound, lap_start, lap_end.
         </div>
@@ -59,8 +84,148 @@ export function StrategyView({ results, hasStints }: Props) {
     )
   }
 
-  // Placeholder for when stints data is available
+  const sortedDrivers = [...results].sort((a, b) => a.position - b.position)
+  const totalLaps = Math.max(
+    ...stints.map((s) => s.lap_end),
+    ...results.map((r) => r.number_of_laps),
+    1
+  )
+
+  const SVG_W = 640
+  const LEFT = 48
+  const RIGHT = 12
+  const ROW_H = 28
+  const BAR_H = 14
+  const BAR_Y = 7
+  const BAR_W = SVG_W - LEFT - RIGHT
+  const SVG_H = sortedDrivers.length * ROW_H + 8
+
+  const lapX = (lap: number) => LEFT + ((lap - 1) / totalLaps) * BAR_W
+  const stintW = (s: Stint) =>
+    Math.max(2, ((s.lap_end - s.lap_start + 1) / totalLaps) * BAR_W)
+
+  const usedCompounds = [...new Set(stints.map((s) => s.compound.toUpperCase()))].filter(
+    (c) => c in COMPOUND_COLORS
+  )
+
   return (
-    <div className="missing-notice">Strategy chart: not yet implemented.</div>
+    <div data-testid="strategy-chart">
+      <div className="scroll-x">
+        <svg
+          viewBox={`0 0 ${SVG_W} ${SVG_H}`}
+          style={{ width: '100%', minWidth: 280, maxWidth: SVG_W, display: 'block' }}
+          role="img"
+          aria-label="Race strategy stint chart"
+        >
+          {sortedDrivers.map((driver, i) => {
+            const rowY = i * ROW_H
+            const color = driver.team_colour ? `#${driver.team_colour}` : '#888'
+            const dStints = stints.filter((s) => s.driver_number === driver.driver_number)
+            const dPits = pit_stops.filter((p) => p.driver_number === driver.driver_number)
+
+            return (
+              <g key={driver.driver_number} transform={`translate(0,${rowY})`}>
+                <text
+                  x={LEFT - 5}
+                  y={BAR_Y + BAR_H / 2 + 4}
+                  textAnchor="end"
+                  fill={color}
+                  fontFamily="var(--f-mono)"
+                  fontWeight={700}
+                  fontSize={10}
+                >
+                  {driver.name_acronym}
+                </text>
+
+                {dStints.map((stint, si) => {
+                  const x = lapX(stint.lap_start)
+                  const w = stintW(stint)
+                  const fill = compoundColor(stint.compound)
+                  return (
+                    <g key={si}>
+                      <rect x={x} y={BAR_Y} width={w} height={BAR_H} fill={fill} rx={1.5} />
+                      {w > 18 && (
+                        <text
+                          x={x + w / 2}
+                          y={BAR_Y + BAR_H / 2 + 4}
+                          textAnchor="middle"
+                          fill="#111"
+                          fontFamily="var(--f-mono)"
+                          fontWeight={700}
+                          fontSize={8}
+                        >
+                          {compoundInitial(stint.compound)}
+                        </text>
+                      )}
+                    </g>
+                  )
+                })}
+
+                {dPits.map((pit, pi) => {
+                  const x = lapX(pit.lap_number)
+                  return (
+                    <line
+                      key={pi}
+                      x1={x}
+                      x2={x}
+                      y1={BAR_Y - 3}
+                      y2={BAR_Y + BAR_H + 3}
+                      stroke="var(--text)"
+                      strokeWidth={1.5}
+                      opacity={0.7}
+                    />
+                  )
+                })}
+              </g>
+            )
+          })}
+        </svg>
+      </div>
+
+      <div
+        style={{
+          display: 'flex',
+          gap: 'var(--s4)',
+          flexWrap: 'wrap',
+          marginTop: 'var(--s4)',
+          fontSize: 11,
+          color: 'var(--text-3)',
+          alignItems: 'center',
+        }}
+      >
+        {usedCompounds.map((c) => (
+          <span key={c} style={{ display: 'inline-flex', alignItems: 'center', gap: 4 }}>
+            <span
+              style={{
+                width: 10,
+                height: 10,
+                background: COMPOUND_COLORS[c],
+                borderRadius: 2,
+                display: 'inline-block',
+                border: c === 'HARD' ? '1px solid #555' : undefined,
+              }}
+            />
+            {c.charAt(0) + c.slice(1).toLowerCase()}
+          </span>
+        ))}
+        {pit_stops.length > 0 && (
+          <span style={{ display: 'inline-flex', alignItems: 'center', gap: 5, marginLeft: 4 }}>
+            <span
+              style={{
+                width: 1,
+                height: 12,
+                background: 'var(--text)',
+                display: 'inline-block',
+                opacity: 0.7,
+              }}
+            />
+            Pit stop
+          </span>
+        )}
+        <span style={{ marginLeft: 'auto', fontFamily: 'var(--f-mono)', fontSize: 10 }}>
+          {totalLaps} laps
+        </span>
+      </div>
+    </div>
   )
 }