feat(tui): detect terminal theme and apply palettes

1 files changed, 39 insertions, 0 deletions

diff --git a/internal/tui/common/styles_test.go b/internal/tui/common/styles_test.go
new file mode 100644
index 0000000..c0900b3
--- /dev/null
+++ b/internal/tui/common/styles_test.go
@@ -0,0 +1,39 @@
+package common
+
+import (
+	"testing"
+
+	"charm.land/lipgloss/v2"
+)
+
+func TestNewPaletteRendersDistinctThemes(t *testing.T) {
+	dark := NewPalette(true)
+	light := NewPalette(false)
+
+	darkRender := lipgloss.NewStyle().
+		Foreground(dark.Text).
+		Background(dark.Background).
+		Render("ior")
+	lightRender := lipgloss.NewStyle().
+		Foreground(light.Text).
+		Background(light.Background).
+		Render("ior")
+
+	if darkRender == lightRender {
+		t.Fatalf("expected dark and light palettes to render differently")
+	}
+}
+
+func TestApplyPaletteUpdatesSharedStyles(t *testing.T) {
+	t.Cleanup(func() { ApplyPalette(true) })
+
+	ApplyPalette(true)
+	dark := ScreenStyle.Render("ior")
+
+	ApplyPalette(false)
+	light := ScreenStyle.Render("ior")
+
+	if dark == light {
+		t.Fatalf("expected ScreenStyle render to differ between dark and light palettes")
+	}
+}