Add "power" page

Signed-off-by: Hadi <[email protected]>

internal/ui/power/battery.go

@@ -0,0 +1,139 @@
+package power
+
+import (
+	"fmt"
+	"strings"
+
+	"charm.land/lipgloss/v2"
+	ilovetui "github.com/anotherhadi/ilovetui"
+	"github.com/anotherhadi/settuings/internal/power"
+)
+
+func (m *Model) handleBattery(msg batteryMsg) {
+	m.batteryLoading = false
+	m.batteryErr = msg.err
+	if msg.err != nil {
+		return
+	}
+	m.batteries = msg.batteries
+	m.ac = msg.ac
+}
+
+func (m Model) renderBattery(width int) string {
+	title := lipgloss.NewStyle().Bold(true).Render("Battery")
+
+	switch {
+	case m.batteryLoading:
+		return lipgloss.JoinVertical(lipgloss.Left, title, "", ilovetui.S.Faint.Render("Reading battery status…"))
+	case m.batteryErr != nil:
+		return lipgloss.JoinVertical(lipgloss.Left, title, "", errorStyle().Render(m.batteryErr.Error()))
+	}
+
+	lines := []string{title, ""}
+	if len(m.batteries) == 0 {
+		lines = append(lines, subtleStyle().Render("No battery detected — this looks like a desktop."))
+	}
+	for i, b := range m.batteries {
+		if i > 0 {
+			lines = append(lines, "")
+		}
+		lines = append(lines, renderBatteryInfo(b, width)...)
+	}
+
+	lines = append(lines, "", subtleStyle().Render("Power source:  ")+acLabel(m.ac))
+
+	return lipgloss.JoinVertical(lipgloss.Left, lines...)
+}
+
+func renderBatteryInfo(b power.Battery, width int) []string {
+	rows := []string{
+		subtleStyle().Render("Name:          ") + b.Name,
+		subtleStyle().Render("Status:        ") + statusLabel(b.Status),
+		subtleStyle().Render("Charge:        ") + renderBatteryBar(b.Capacity, width),
+	}
+	if remaining := timeRemainingLabel(b); remaining != "" {
+		rows = append(rows, subtleStyle().Render("Time left:     ")+remaining)
+	}
+	if b.Health >= 0 {
+		rows = append(rows, subtleStyle().Render("Health:        ")+fmt.Sprintf("%d%%", b.Health))
+	}
+	if b.CycleCount >= 0 {
+		rows = append(rows, subtleStyle().Render("Cycle count:   ")+fmt.Sprintf("%d", b.CycleCount))
+	}
+	if b.Technology != "" {
+		rows = append(rows, subtleStyle().Render("Technology:    ")+b.Technology)
+	}
+	if model := strings.TrimSpace(b.Manufacturer + " " + b.Model); model != "" {
+		rows = append(rows, subtleStyle().Render("Model:         ")+model)
+	}
+	return rows
+}
+
+func timeRemainingLabel(b power.Battery) string {
+	switch {
+	case b.TimeToEmpty != "":
+		return b.TimeToEmpty + " until empty"
+	case b.TimeToFull != "":
+		return b.TimeToFull + " until full"
+	}
+	return ""
+}
+
+func statusLabel(status string) string {
+	switch status {
+	case "Charging":
+		return successStyle().Render("⚡ Charging")
+	case "Full":
+		return successStyle().Render(status)
+	case "Discharging":
+		return status
+	default:
+		return mutedStyle().Render(status)
+	}
+}
+
+func acLabel(ac power.ACStatus) string {
+	switch {
+	case !ac.Present:
+		return mutedStyle().Render("unknown")
+	case ac.Online:
+		return successStyle().Render("connected")
+	default:
+		return mutedStyle().Render("disconnected")
+	}
+}
+
+// renderBatteryBar draws a static block-bar gauge for the charge level,
+// colored by how low it is, same spirit as the audio page's volume bar.
+func renderBatteryBar(pct, width int) string {
+	if pct < 0 {
+		return subtleStyle().Render("unknown")
+	}
+
+	barWidth := width / 3
+	switch {
+	case barWidth < 10:
+		barWidth = 10
+	case barWidth > 30:
+		barWidth = 30
+	}
+
+	filled := pct * barWidth / 100
+	switch {
+	case filled > barWidth:
+		filled = barWidth
+	case filled < 0:
+		filled = 0
+	}
+	bar := strings.Repeat("█", filled) + strings.Repeat("░", barWidth-filled)
+
+	color := ilovetui.S.Success
+	switch {
+	case pct <= 15:
+		color = ilovetui.S.Error
+	case pct <= 35:
+		color = ilovetui.S.Warning
+	}
+	gauge := lipgloss.NewStyle().Foreground(color).Render("[" + bar + "]")
+	return fmt.Sprintf("%s %3d%%", gauge, pct)
+}