feat(tui): add flamegraph bytes metric toggle

1 files changed, 46 insertions, 23 deletions

diff --git a/internal/tui/flamegraph/controls.go b/internal/tui/flamegraph/controls.go
index cd74df5..06e6d0d 100644
--- a/internal/tui/flamegraph/controls.go
+++ b/internal/tui/flamegraph/controls.go
@@ -13,10 +13,7 @@ func (m *Model) togglePause() {
 	m.paused = !m.paused
 }
 
-func (m *Model) resetBaseline() {
-	if m.liveTrie != nil {
-		m.liveTrie.Reset()
-	}
+func (m *Model) clearSnapshotState(clearSearch bool) {
 	m.zoomRoot = nil
 	m.zoomPath = ""
 	m.zoomStack = nil
@@ -25,11 +22,20 @@ func (m *Model) resetBaseline() {
 	m.globalTotal = 0
 	m.frames = nil
 	m.targetFrames = nil
-	m.searchQuery = ""
 	m.matchIndices = make(map[int]bool)
 	m.filterVisible = make(map[int]bool)
 	m.subtreeSet = make(map[int]bool)
 	m.hasNavigableSnapshot = false
+	if clearSearch {
+		m.searchQuery = ""
+	}
+}
+
+func (m *Model) resetBaseline() {
+	if m.liveTrie != nil {
+		m.liveTrie.Reset()
+	}
+	m.clearSnapshotState(true)
 	m.statusMessage = "Baseline reset"
 }
 
@@ -45,21 +51,26 @@ func (m *Model) cycleFieldOrder() {
 			return
 		}
 	}
-	m.zoomRoot = nil
-	m.zoomPath = ""
-	m.zoomStack = nil
-	m.selectedIdx = 0
-	m.snapshot = nil
-	m.globalTotal = 0
-	m.frames = nil
-	m.targetFrames = nil
-	m.matchIndices = make(map[int]bool)
-	m.filterVisible = make(map[int]bool)
-	m.subtreeSet = make(map[int]bool)
-	m.hasNavigableSnapshot = false
+	m.clearSnapshotState(false)
 	m.statusMessage = "Order: " + strings.Join(nextPreset, "/")
 }
 
+func (m *Model) toggleCountField() {
+	next := "bytes"
+	if m.countField == "bytes" {
+		next = "count"
+	}
+	if m.liveTrie != nil {
+		if err := m.liveTrie.SetCountField(next); err != nil {
+			m.statusMessage = "Metric toggle error: " + err.Error()
+			return
+		}
+	}
+	m.countField = next
+	m.clearSnapshotState(false)
+	m.statusMessage = "Metric: " + m.countFieldLabel() + " (new baseline)"
+}
+
 func (m *Model) toggleHelp() {
 	m.showHelp = !m.showHelp
 }
@@ -70,7 +81,7 @@ func (m Model) toolbarLine() string {
 		state = lipgloss.NewStyle().Foreground(common.ColorDanger).Bold(true).Render("[PAUSED]")
 	}
 	order := m.currentFieldPresetLabel()
-	line := fmt.Sprintf("%s | view:%s | o:order(%s) | /:search | enter:zoom | u/esc:undo | r:reset | space/p:pause", state, compactFramePath(m.currentRootPath()), order)
+	line := fmt.Sprintf("%s | view:%s | o:order(%s) | b:metric(%s) | /:search | enter:zoom | u/esc:undo | r:reset | space/p:pause", state, compactFramePath(m.currentRootPath()), order, m.countFieldLabel())
 	if m.searchQuery != "" {
 		line += " | filter:" + m.searchQuery
 	}
@@ -92,7 +103,7 @@ func (m Model) helpOverlay() string {
 	if width <= 0 {
 		width = 80
 	}
-	help := "Flame help: j/k depth  h/l sibling  pgup top  pgdn root  enter zoom  u/backspace/esc undo  / search  n/N matches  space/p pause  r reset baseline  o order  ? help"
+	help := "Flame help: j/k depth  h/l sibling  pgup top  pgdn root  enter zoom  u/backspace/esc undo  / search  n/N matches  space/p pause  r reset baseline  o order  b metric  ? help"
 	return common.HelpBarStyle.Width(width).Render(padOrTrim(help, width))
 }
 
@@ -118,17 +129,18 @@ func (m Model) selectionStatusLine() string {
 	if m.globalTotal > 0 {
 		systemShare = percentOfTotal(frame.Total, m.globalTotal)
 	}
-	shareLabel := fmt.Sprintf("%.2f%% system", systemShare)
+	metric := m.countFieldLabel()
+	shareLabel := fmt.Sprintf("%.2f%% of total %s", systemShare, metric)
 	if strings.TrimSpace(m.searchQuery) != "" && len(m.matchIndices) > 0 {
 		filterTotal, _ := filterCoverageTotals(m.frames, m.matchIndices, m.globalTotal)
 		if filterTotal > 0 {
 			selectedFilterTotal := filterCoverageTotalForPath(m.frames, m.matchIndices, frame.Path)
 			filterShare := percentOfTotal(selectedFilterTotal, filterTotal)
-			shareLabel = fmt.Sprintf("%.2f%% filter", filterShare)
+			shareLabel = fmt.Sprintf("%.2f%% of filtered %s", filterShare, metric)
 		}
 	}
-	line := fmt.Sprintf("[%s] sel:%d/%d %s | path:%s | depth:%d | total:%d | %s",
-		mode, selIdx+1, len(m.frames), frame.Name, compactFramePath(frame.Path), frame.Depth, frame.Total, shareLabel)
+	line := fmt.Sprintf("[%s] sel:%d/%d %s | path:%s | depth:%d | total(%s):%d | %s",
+		mode, selIdx+1, len(m.frames), frame.Name, compactFramePath(frame.Path), frame.Depth, m.countFieldLabel(), frame.Total, shareLabel)
 	if m.searchQuery != "" {
 		line += " | filter:" + m.searchQuery
 	}
@@ -148,3 +160,14 @@ func (m Model) currentFieldPresetLabel() string {
 	}
 	return strings.Join(m.fieldPresets[idx], "/")
 }
+
+func (m Model) countFieldLabel() string {
+	switch m.countField {
+	case "count":
+		return "events"
+	case "bytes":
+		return "bytes"
+	default:
+		return m.countField
+	}
+}