feat: Change /stats to include more detailed breakdowns (#2615)

1 files changed, 200 insertions, 60 deletions

diff --git a/packages/cli/src/ui/components/StatsDisplay.tsx b/packages/cli/src/ui/components/StatsDisplay.tsx
index 76d48821..249fc106 100644
--- a/packages/cli/src/ui/components/StatsDisplay.tsx
+++ b/packages/cli/src/ui/components/StatsDisplay.tsx
@@ -8,90 +8,230 @@ import React from 'react';
 import { Box, Text } from 'ink';
 import { Colors } from '../colors.js';
 import { formatDuration } from '../utils/formatters.js';
-import { CumulativeStats } from '../contexts/SessionContext.js';
-import { FormattedStats, StatRow, StatsColumn } from './Stats.js';
+import { useSessionStats, ModelMetrics } from '../contexts/SessionContext.js';
+import {
+  getStatusColor,
+  TOOL_SUCCESS_RATE_HIGH,
+  TOOL_SUCCESS_RATE_MEDIUM,
+  USER_AGREEMENT_RATE_HIGH,
+  USER_AGREEMENT_RATE_MEDIUM,
+} from '../utils/displayUtils.js';
+import { computeSessionStats } from '../utils/computeStats.js';
 
-// --- Constants ---
+// A more flexible and powerful StatRow component
+interface StatRowProps {
+  title: string;
+  children: React.ReactNode; // Use children to allow for complex, colored values
+}
+
+const StatRow: React.FC<StatRowProps> = ({ title, children }) => (
+  <Box>
+    {/* Fixed width for the label creates a clean "gutter" for alignment */}
+    <Box width={28}>
+      <Text color={Colors.LightBlue}>{title}</Text>
+    </Box>
+    {children}
+  </Box>
+);
+
+// A SubStatRow for indented, secondary information
+interface SubStatRowProps {
+  title: string;
+  children: React.ReactNode;
+}
+
+const SubStatRow: React.FC<SubStatRowProps> = ({ title, children }) => (
+  <Box paddingLeft={2}>
+    {/* Adjust width for the "» " prefix */}
+    <Box width={26}>
+      <Text>» {title}</Text>
+    </Box>
+    {children}
+  </Box>
+);
+
+// A Section component to group related stats
+interface SectionProps {
+  title: string;
+  children: React.ReactNode;
+}
+
+const Section: React.FC<SectionProps> = ({ title, children }) => (
+  <Box flexDirection="column" width="100%" marginBottom={1}>
+    <Text bold>{title}</Text>
+    {children}
+  </Box>
+);
 
-const COLUMN_WIDTH = '48%';
+const ModelUsageTable: React.FC<{
+  models: Record<string, ModelMetrics>;
+  totalCachedTokens: number;
+  cacheEfficiency: number;
+}> = ({ models, totalCachedTokens, cacheEfficiency }) => {
+  const nameWidth = 25;
+  const requestsWidth = 8;
+  const inputTokensWidth = 15;
+  const outputTokensWidth = 15;
 
-// --- Prop and Data Structures ---
+  return (
+    <Box flexDirection="column" marginTop={1}>
+      {/* Header */}
+      <Box>
+        <Box width={nameWidth}>
+          <Text bold>Model Usage</Text>
+        </Box>
+        <Box width={requestsWidth} justifyContent="flex-end">
+          <Text bold>Reqs</Text>
+        </Box>
+        <Box width={inputTokensWidth} justifyContent="flex-end">
+          <Text bold>Input Tokens</Text>
+        </Box>
+        <Box width={outputTokensWidth} justifyContent="flex-end">
+          <Text bold>Output Tokens</Text>
+        </Box>
+      </Box>
+      {/* Divider */}
+      <Box
+        borderStyle="round"
+        borderBottom={true}
+        borderTop={false}
+        borderLeft={false}
+        borderRight={false}
+        width={nameWidth + requestsWidth + inputTokensWidth + outputTokensWidth}
+      ></Box>
+
+      {/* Rows */}
+      {Object.entries(models).map(([name, modelMetrics]) => (
+        <Box key={name}>
+          <Box width={nameWidth}>
+            <Text>{name.replace('-001', '')}</Text>
+          </Box>
+          <Box width={requestsWidth} justifyContent="flex-end">
+            <Text>{modelMetrics.api.totalRequests}</Text>
+          </Box>
+          <Box width={inputTokensWidth} justifyContent="flex-end">
+            <Text color={Colors.AccentYellow}>
+              {modelMetrics.tokens.prompt.toLocaleString()}
+            </Text>
+          </Box>
+          <Box width={outputTokensWidth} justifyContent="flex-end">
+            <Text color={Colors.AccentYellow}>
+              {modelMetrics.tokens.candidates.toLocaleString()}
+            </Text>
+          </Box>
+        </Box>
+      ))}
+      {cacheEfficiency > 0 && (
+        <Box flexDirection="column" marginTop={1}>
+          <Text>
+            <Text color={Colors.AccentGreen}>Savings Highlight:</Text>{' '}
+            {totalCachedTokens.toLocaleString()} ({cacheEfficiency.toFixed(1)}
+            %) of input tokens were served from the cache, reducing costs.
+          </Text>
+          <Box height={1} />
+          <Text color={Colors.Gray}>
+            » Tip: For a full token breakdown, run `/stats model`.
+          </Text>
+        </Box>
+      )}
+    </Box>
+  );
+};
 
 interface StatsDisplayProps {
-  stats: CumulativeStats;
-  lastTurnStats: CumulativeStats;
   duration: string;
 }
 
-// --- Main Component ---
+export const StatsDisplay: React.FC<StatsDisplayProps> = ({ duration }) => {
+  const { stats } = useSessionStats();
+  const { metrics } = stats;
+  const { models, tools } = metrics;
+  const computed = computeSessionStats(metrics);
 
-export const StatsDisplay: React.FC<StatsDisplayProps> = ({
-  stats,
-  lastTurnStats,
-  duration,
-}) => {
-  const lastTurnFormatted: FormattedStats = {
-    inputTokens: lastTurnStats.promptTokenCount,
-    outputTokens: lastTurnStats.candidatesTokenCount,
-    toolUseTokens: lastTurnStats.toolUsePromptTokenCount,
-    thoughtsTokens: lastTurnStats.thoughtsTokenCount,
-    cachedTokens: lastTurnStats.cachedContentTokenCount,
-    totalTokens: lastTurnStats.totalTokenCount,
+  const successThresholds = {
+    green: TOOL_SUCCESS_RATE_HIGH,
+    yellow: TOOL_SUCCESS_RATE_MEDIUM,
   };
-
-  const cumulativeFormatted: FormattedStats = {
-    inputTokens: stats.promptTokenCount,
-    outputTokens: stats.candidatesTokenCount,
-    toolUseTokens: stats.toolUsePromptTokenCount,
-    thoughtsTokens: stats.thoughtsTokenCount,
-    cachedTokens: stats.cachedContentTokenCount,
-    totalTokens: stats.totalTokenCount,
+  const agreementThresholds = {
+    green: USER_AGREEMENT_RATE_HIGH,
+    yellow: USER_AGREEMENT_RATE_MEDIUM,
   };
+  const successColor = getStatusColor(computed.successRate, successThresholds);
+  const agreementColor = getStatusColor(
+    computed.agreementRate,
+    agreementThresholds,
+  );
 
   return (
     <Box
       borderStyle="round"
-      borderColor="gray"
+      borderColor={Colors.Gray}
       flexDirection="column"
       paddingY={1}
       paddingX={2}
     >
       <Text bold color={Colors.AccentPurple}>
-        Stats
+        Session Stats
       </Text>
+      <Box height={1} />
 
-      <Box flexDirection="row" justifyContent="space-between" marginTop={1}>
-        <StatsColumn
-          title="Last Turn"
-          stats={lastTurnFormatted}
-          width={COLUMN_WIDTH}
-        />
-        <StatsColumn
-          title={`Cumulative (${stats.turnCount} Turns)`}
-          stats={cumulativeFormatted}
-          isCumulative={true}
-          width={COLUMN_WIDTH}
-        />
-      </Box>
+      {tools.totalCalls > 0 && (
+        <Section title="Interaction Summary">
+          <StatRow title="Tool Calls:">
+            <Text>
+              {tools.totalCalls} ({' '}
+              <Text color={Colors.AccentGreen}>✔ {tools.totalSuccess}</Text>{' '}
+              <Text color={Colors.AccentRed}>✖ {tools.totalFail}</Text> )
+            </Text>
+          </StatRow>
+          <StatRow title="Success Rate:">
+            <Text color={successColor}>{computed.successRate.toFixed(1)}%</Text>
+          </StatRow>
+          {computed.totalDecisions > 0 && (
+            <StatRow title="User Agreement:">
+              <Text color={agreementColor}>
+                {computed.agreementRate.toFixed(1)}%{' '}
+                <Text color={Colors.Gray}>
+                  ({computed.totalDecisions} reviewed)
+                </Text>
+              </Text>
+            </StatRow>
+          )}
+        </Section>
+      )}
 
-      <Box flexDirection="row" justifyContent="space-between" marginTop={1}>
-        {/* Left column for "Last Turn" duration */}
-        <Box width={COLUMN_WIDTH} flexDirection="column">
-          <StatRow
-            label="Turn Duration (API)"
-            value={formatDuration(lastTurnStats.apiTimeMs)}
-          />
-        </Box>
+      <Section title="Performance">
+        <StatRow title="Wall Time:">
+          <Text>{duration}</Text>
+        </StatRow>
+        <StatRow title="Agent Active:">
+          <Text>{formatDuration(computed.agentActiveTime)}</Text>
+        </StatRow>
+        <SubStatRow title="API Time:">
+          <Text>
+            {formatDuration(computed.totalApiTime)}{' '}
+            <Text color={Colors.Gray}>
+              ({computed.apiTimePercent.toFixed(1)}%)
+            </Text>
+          </Text>
+        </SubStatRow>
+        <SubStatRow title="Tool Time:">
+          <Text>
+            {formatDuration(computed.totalToolTime)}{' '}
+            <Text color={Colors.Gray}>
+              ({computed.toolTimePercent.toFixed(1)}%)
+            </Text>
+          </Text>
+        </SubStatRow>
+      </Section>
 
-        {/* Right column for "Cumulative" durations */}
-        <Box width={COLUMN_WIDTH} flexDirection="column">
-          <StatRow
-            label="Total duration (API)"
-            value={formatDuration(stats.apiTimeMs)}
-          />
-          <StatRow label="Total duration (wall)" value={duration} />
-        </Box>
-      </Box>
+      {Object.keys(models).length > 0 && (
+        <ModelUsageTable
+          models={models}
+          totalCachedTokens={computed.totalCachedTokens}
+          cacheEfficiency={computed.cacheEfficiency}
+        />
+      )}
     </Box>
   );
 };