package storage

import "testing"

func TestFitsWithin(t *testing.T) {
	cases := []struct {
		name          string
		w, h, maxSide int
		want          bool
	}{
		{"未设置上限时恒为真", 8000, 8000, 0, true},
		{"负上限等同于不限制", 8000, 8000, -1, true},
		{"宽高均在限内", 512, 512, 512, true},
		{"刚好等于上限", 1600, 1200, 1600, true},
		{"仅超宽", 1921, 1080, 1920, false},
		{"仅超高（竖图长边此前不受约束）", 1080, 10000, 1920, false},
		{"双向超限", 4000, 5000, 1600, false},
	}

	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {
			if got := fitsWithin(c.w, c.h, c.maxSide); got != c.want {
				t.Fatalf("fitsWithin(%d, %d, %d) = %v, want %v", c.w, c.h, c.maxSide, got, c.want)
			}
		})
	}
}

// 各用途档位必须与其展示场景相称：头像按前端 cropper 输出上限兜底，
// 背景保留铺满宽度所需尺寸，通用图取折中值。
func TestEncodeSpecTiers(t *testing.T) {
	if avatarEncodeSpec.MaxSide != 512 {
		t.Errorf("avatar MaxSide = %d, want 512", avatarEncodeSpec.MaxSide)
	}
	if backgroundEncodeSpec.MaxSide != 1920 {
		t.Errorf("background MaxSide = %d, want 1920", backgroundEncodeSpec.MaxSide)
	}
	if GeneralEncodeSpec.MaxSide != 1600 {
		t.Errorf("general MaxSide = %d, want 1600", GeneralEncodeSpec.MaxSide)
	}
	for name, s := range map[string]EncodeSpec{
		"avatar": avatarEncodeSpec, "background": backgroundEncodeSpec, "general": GeneralEncodeSpec,
	} {
		if s.Quality <= 0 || s.Quality > 100 {
			t.Errorf("%s Quality = %v, out of range (0,100]", name, s.Quality)
		}
	}
}