tui simulation

internal/tui/update.go

@@ -0,0 +1,151 @@
+package tui
+
+import (
+	"time"
+
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+// tickMsg is sent periodically to refresh the TUI
+type tickMsg time.Time
+
+// tickCmd returns a command that sends a tickMsg after 100ms
+func tickCmd() tea.Cmd {
+	return tea.Tick(100*time.Millisecond, func(t time.Time) tea.Msg {
+		return tickMsg(t)
+	})
+}
+
+// Init initializes the model and starts the tick loop
+func (m Model) Init() tea.Cmd {
+	return tickCmd()
+}
+
+// Update handles messages and updates the model
+func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg := msg.(type) {
+	case tickMsg:
+		// Tick fired, refresh and continue ticking
+		return m, tickCmd()
+
+	case tea.KeyMsg:
+		return m.handleKeypress(msg)
+
+	case tea.WindowSizeMsg:
+		m.width = msg.Width
+		m.height = msg.Height
+		return m, nil
+	}
+
+	return m, nil
+}
+
+// handleKeypress handles keyboard input
+func (m Model) handleKeypress(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
+	switch msg.String() {
+	case "q", "ctrl+c":
+		m.quitting = true
+		return m, tea.Quit
+
+	case "tab":
+		// Switch focus between panels
+		if m.focusedPanel == PanelControls {
+			m.focusedPanel = PanelLogs
+		} else {
+			m.focusedPanel = PanelControls
+		}
+		return m, nil
+
+	case "up", "k":
+		if m.focusedPanel == PanelControls {
+			if m.focusedCtrl > 0 {
+				m.focusedCtrl--
+			}
+		} else {
+			// Scroll logs up
+			maxOffset := max(m.logBuffer.Len()-(m.height-10), 0)
+			if m.logOffset < maxOffset {
+				m.logOffset++
+			}
+		}
+		return m, nil
+
+	case "down", "j":
+		if m.focusedPanel == PanelControls {
+			if m.focusedCtrl < len(m.controls)-1 {
+				m.focusedCtrl++
+			}
+		} else {
+			// Scroll logs down
+			if m.logOffset > 0 {
+				m.logOffset--
+			}
+		}
+		return m, nil
+
+	case "left", "h":
+		if m.focusedPanel == PanelControls {
+			ctrl := &m.controls[m.focusedCtrl]
+			if ctrl.Type == ControlSlider {
+				value := ctrl.GetValue()
+				newValue := max(value-ctrl.Step, ctrl.Min)
+				ctrl.SetValue(newValue)
+			}
+		}
+		return m, nil
+
+	case "right", "l":
+		if m.focusedPanel == PanelControls {
+			ctrl := &m.controls[m.focusedCtrl]
+			if ctrl.Type == ControlSlider {
+				value := ctrl.GetValue()
+				newValue := min(value+ctrl.Step, ctrl.Max)
+				ctrl.SetValue(newValue)
+			}
+		}
+		return m, nil
+
+	case "enter", " ":
+		if m.focusedPanel == PanelControls {
+			ctrl := &m.controls[m.focusedCtrl]
+			if ctrl.Type == ControlButton && ctrl.Action != nil {
+				ctrl.Action()
+			}
+		}
+		return m, nil
+
+	case "home":
+		// Jump to top of logs
+		if m.focusedPanel == PanelLogs {
+			maxOffset := m.logBuffer.Len() - (m.height - 10)
+			if maxOffset > 0 {
+				m.logOffset = maxOffset
+			}
+		}
+		return m, nil
+
+	case "end":
+		// Jump to bottom of logs
+		if m.focusedPanel == PanelLogs {
+			m.logOffset = 0
+		}
+		return m, nil
+
+	case "pgup":
+		if m.focusedPanel == PanelLogs {
+			pageSize := m.height - 10
+			maxOffset := max(m.logBuffer.Len()-pageSize, 0)
+			m.logOffset = min(m.logOffset+pageSize, maxOffset)
+		}
+		return m, nil
+
+	case "pgdown":
+		if m.focusedPanel == PanelLogs {
+			pageSize := m.height - 10
+			m.logOffset = max(m.logOffset-pageSize, 0)
+		}
+		return m, nil
+	}
+
+	return m, nil
+}