package main

import (
	"os"
	"path/filepath"
	"testing"
)

// xfwm4 falls back to an ugly built-in frame when any of these slices is missing.
var requiredSlices = []string{
	"top-left", "top-right", "left", "right", "bottom", "bottom-left", "bottom-right",
	"title-1", "title-2", "title-3", "title-4", "title-5",
}

var requiredButtons = []string{
	"close", "hide", "maximize", "maximize-toggled", "menu",
	"shade", "shade-toggled", "stick", "stick-toggled",
}

func TestGenerateWritesCompleteTheme(t *testing.T) {
	for name, v := range variants {
		t.Run(name, func(t *testing.T) {
			dir := t.TempDir()
			if err := generate(v, dir); err != nil {
				t.Fatal(err)
			}
			want := []string{"themerc"}
			for _, s := range requiredSlices {
				want = append(want, s+"-active.png", s+"-inactive.png")
			}
			for _, b := range requiredButtons {
				for _, state := range []string{"active", "inactive", "prelight", "pressed"} {
					want = append(want, b+"-"+state+".png")
				}
			}
			for _, f := range want {
				if _, err := os.Stat(filepath.Join(dir, f)); err != nil {
					t.Errorf("missing %s", f)
				}
			}
		})
	}
}

func TestTopLeftCornerIsTransparentOutsideRadius(t *testing.T) {
	img := render(cornerWidth, titleHeight, topLeft(variants["light"].active))
	if a := img.NRGBAAt(0, 0).A; a != 0 {
		t.Errorf("corner pixel alpha = %d, want 0", a)
	}
	if a := img.NRGBAAt(cornerWidth-1, titleHeight/2).A; a != 0xff {
		t.Errorf("title pixel alpha = %d, want 255", a)
	}
}

func TestButtonsMatchTitleHeight(t *testing.T) {
	for _, p := range pieces(variants["dark"]) {
		if p.w == buttonWidth && p.h != titleHeight {
			t.Errorf("%s height = %d, want %d", p.name, p.h, titleHeight)
		}
	}
}