From bcc13128575cc4e332a79488b5b052330b8caa5e Mon Sep 17 00:00:00 2001
From: Andres <andres99.dev@gmail.com>
Date: Wed, 21 May 2025 22:02:34 +0200
Subject: [PATCH] add rolling winrate chart

---
 .../[id]/_components/winrate-trend-chart.tsx  | 170 ++++++++++++++++++
 src/app/(home)/players/[id]/user.tsx          |   9 +
 2 files changed, 179 insertions(+)
 create mode 100644 src/app/(home)/players/[id]/_components/winrate-trend-chart.tsx

diff --git a/src/app/(home)/players/[id]/_components/winrate-trend-chart.tsx b/src/app/(home)/players/[id]/_components/winrate-trend-chart.tsx
new file mode 100644
index 0000000..b4a9f8a
--- /dev/null
+++ b/src/app/(home)/players/[id]/_components/winrate-trend-chart.tsx
@@ -0,0 +1,170 @@
+'use client'
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardFooter,
+  CardHeader,
+  CardTitle,
+} from '@/components/ui/card'
+import {
+  type ChartConfig,
+  ChartContainer,
+  ChartTooltip,
+  ChartTooltipContent,
+} from '@/components/ui/chart'
+import { Slider } from '@/components/ui/slider'
+import type { SelectGames } from '@/server/db/types'
+import { useState } from 'react'
+import { CartesianGrid, Line, LineChart, XAxis, YAxis } from 'recharts'
+
+const chartConfig = {
+  winrate: {
+    label: 'Winrate',
+    color: 'var(--color-emerald-500)',
+  },
+} satisfies ChartConfig
+
+export function WinrateTrendChart({ games }: { games: SelectGames[] }) {
+  const [gamesWindow, setGamesWindow] = useState(30)
+
+  // Sort games by date (oldest to newest)
+  const sortedGames = [...games].sort(
+    (a, b) => a.gameTime.getTime() - b.gameTime.getTime()
+  )
+
+  // Calculate rolling winrate
+  const chartData = calculateRollingWinrate(sortedGames, gamesWindow)
+
+  return (
+    <Card>
+      <CardHeader className='flex flex-row items-center justify-between'>
+        <div>
+          <CardTitle>Winrate Trends</CardTitle>
+          <CardDescription>Rolling winrate over time</CardDescription>
+        </div>
+        <div className='flex w-[200px] flex-col gap-2'>
+          <div className='flex items-center justify-between'>
+            <span className='text-muted-foreground text-sm'>
+              Window size: {gamesWindow} games
+            </span>
+          </div>
+          <Slider
+            value={[gamesWindow]}
+            onValueChange={(value) => setGamesWindow(value[0])}
+            min={5}
+            max={Math.min(100, games.length)}
+            step={1}
+          />
+        </div>
+      </CardHeader>
+      <CardContent className={'p-2'}>
+        <ChartContainer config={chartConfig}>
+          <LineChart
+            accessibilityLayer
+            data={chartData}
+            margin={{
+              left: 12,
+              right: 12,
+            }}
+          >
+            <CartesianGrid vertical={false} />
+            <XAxis
+              dataKey='date'
+              tickLine={false}
+              axisLine={false}
+              tickMargin={8}
+              tickFormatter={(value) =>
+                new Date(value).toLocaleDateString('en-US', {
+                  month: 'short',
+                  day: 'numeric',
+                })
+              }
+            />
+            <YAxis
+              dataKey={'winrate'}
+              width={40}
+              tickLine={false}
+              axisLine={false}
+              tickFormatter={(value) => `${value}%`}
+              domain={[0, 100]}
+            />
+            <ChartTooltip
+              cursor={false}
+              content={
+                <ChartTooltipContent
+                  hideLabel
+                  formatter={(value, name, entry) => {
+                    const date = new Date(entry.payload.date)
+                    const formattedDate = date.toLocaleDateString('en-US', {
+                      year: 'numeric',
+                      month: 'long',
+                      day: 'numeric',
+                    })
+                    return (
+                      <div className='flex flex-col'>
+                        <span>{value}%</span>
+                        <span className='text-muted-foreground'>
+                          {formattedDate}
+                        </span>
+                      </div>
+                    )
+                  }}
+                />
+              }
+            />
+            <Line
+              dataKey='winrate'
+              type='natural'
+              stroke='var(--color-emerald-500)'
+              strokeWidth={2}
+              dot={false}
+            />
+          </LineChart>
+        </ChartContainer>
+      </CardContent>
+      <CardFooter className='flex-col items-start gap-2 text-sm'>
+        <div className='text-muted-foreground leading-none'>
+          Showing rolling winrate over the last {gamesWindow} games
+        </div>
+      </CardFooter>
+    </Card>
+  )
+}
+
+function calculateRollingWinrate(
+  games: SelectGames[],
+  windowSize: number
+): { date: Date; winrate: number }[] {
+  if (games.length === 0 || windowSize <= 0) return []
+
+  // Use all games if windowSize is greater than the number of games
+  const effectiveWindowSize = Math.min(windowSize, games.length)
+
+  const result: { date: Date; winrate: number }[] = []
+
+  // We need at least windowSize games to start calculating
+  for (let i = effectiveWindowSize - 1; i < games.length; i++) {
+    // Get the window of games
+    const windowGames = games.slice(
+      Math.max(0, i - effectiveWindowSize + 1),
+      i + 1
+    )
+
+    // Count wins in the window
+    const wins = windowGames.filter((game) => game.result === 'win').length
+
+    // Calculate winrate as percentage
+    const winrate = Math.round((wins / windowGames.length) * 100)
+
+    // Add data point
+    if (games[i]) {
+      result.push({
+        date: games[i]!.gameTime,
+        winrate: winrate,
+      })
+    }
+  }
+
+  return result
+}
diff --git a/src/app/(home)/players/[id]/user.tsx b/src/app/(home)/players/[id]/user.tsx
index 9c44507..e493c25 100644
--- a/src/app/(home)/players/[id]/user.tsx
+++ b/src/app/(home)/players/[id]/user.tsx
@@ -17,6 +17,7 @@ import { useState } from 'react'
 
 import { GamesTable } from '@/app/(home)/players/[id]/_components/games-table'
 import { MmrTrendChart } from '@/app/(home)/players/[id]/_components/mmr-trend-chart'
+import { WinrateTrendChart } from '@/app/(home)/players/[id]/_components/winrate-trend-chart'
 import { OpponentsTable } from '@/app/(home)/players/[id]/_components/opponents-table'
 import { Avatar, AvatarFallback, AvatarImage } from '@/components/ui/avatar'
 import { Badge } from '@/components/ui/badge'
@@ -382,6 +383,7 @@ export function UserInfo() {
               <TabsTrigger value='matches'>Match History</TabsTrigger>
               <TabsTrigger value='opponents'>Opponents</TabsTrigger>
               <TabsTrigger value='mmr-trends'>MMR Trends</TabsTrigger>
+              <TabsTrigger value='winrate-trends'>Winrate Trends</TabsTrigger>
               <TabsTrigger value='stats'>Statistics</TabsTrigger>
               <TabsTrigger value='achievements'>Achievements</TabsTrigger>
             </TabsList>
@@ -443,6 +445,13 @@ export function UserInfo() {
               </div>
             </div>
           </TabsContent>
+          <TabsContent value='winrate-trends' className='m-0'>
+            <div className='overflow-hidden rounded-lg border'>
+              <div className='overflow-x-auto'>
+                <WinrateTrendChart games={games} />
+              </div>
+            </div>
+          </TabsContent>
           <TabsContent value='stats' className='m-0'>
             <div className='grid grid-cols-1 gap-6 md:grid-cols-2'>
               {(rankedLeaderboard || lastRankedGame) && (