package gallery

import (
	"fmt"
	"strings"
	"testing"
)

// TestTheColumnPreviewRestsShorterThanItOpens: the column's footer
// menus open downward under the page, and a box that always held them
// open showed about 300px of nothing under the page at rest. So the
// column has a rest height, and every rest height is written beside
// the open one for view.js to switch to: under the open height on
// Desktop and on Mobile in every locale, since a rest height at or
// over the open one could only hide a short open box. A key without
// one carries no rest height at all, so view.js leaves it alone.
func TestTheColumnPreviewRestsShorterThanItOpens(t *testing.T) {
	column := "layout-column/" + mustEntry(t, "layout-column").Default
	if _, ok := previewRestHeights[column]; !ok {
		t.Errorf("%s has no rest height; its box holds the open footer menus at rest", column)
	}
	m := manifest(t)
	for key, rest := range previewRestHeights {
		name, state, _ := strings.Cut(key, "/")
		if e, ok := m.Entry(name); !ok || !hasState(e, state) {
			t.Errorf("previewRestHeights[%q] names no example state", key)
			continue
		}
		for _, locale := range Locales {
			open, openMobile := previewHeightsFor(locale, key)
			if rest.Desktop >= open || rest.Mobile >= openMobile {
				t.Errorf("%s in %s rests at %d, %d and opens at %d, %d; the rest height must be under the open one", key, locale, rest.Desktop, rest.Mobile, open, openMobile)
			}
			want := fmt.Sprintf("--ds-hr: %dpx; --ds-hmr: %dpx", rest.Desktop, rest.Mobile)
			if got := string(previewStyle(locale, key)); !strings.Contains(got, want) {
				t.Errorf("%s in %s: the widget's style is %q, want it to carry %q", key, locale, got, want)
			}
		}
	}
	for _, key := range []string{"button/default", "dropdown/" + mustEntry(t, "dropdown").Default} {
		if got := string(previewStyle("en", key)); strings.Contains(got, "--ds-hr") {
			t.Errorf("%s has no rest height and its style %q carries one", key, got)
		}
	}
}