package main

import (
	"strings"
	"testing"
)

// 模板里不含 NAVI-WALLPAPER 块时，applyWallpaperBlock 应正确注入；
// 已含旧块时应替换而非追加（否则壁纸规则会重复累积）。
func TestApplyWallpaperBlock_Injects(t *testing.T) {
	base := "html[data-theme] body{color:red}"
	got := applyWallpaperBlock(base, "/wallpapers/x.jpg", 0.35)
	if !strings.Contains(got, wallpaperBegin) || !strings.Contains(got, wallpaperEnd) {
		t.Fatalf("未注入标记块: %q", got)
	}
	if !strings.Contains(got, `url("/wallpapers/x.jpg")`) {
		t.Fatalf("未注入壁纸 url: %q", got)
	}
	if n := strings.Count(got, wallpaperBegin); n != 1 {
		t.Fatalf("标记块应只出现一次，实际 %d 次", n)
	}
	if !strings.Contains(got, "rgba(255,255,255,0.35)") {
		t.Errorf("浅色遮罩透明度不对: %q", got)
	}
	// 深色遮罩应为 dim+0.15
	if !strings.Contains(got, "rgba(6,12,24,0.50)") {
		t.Errorf("深色遮罩应为 0.50（dim+0.15）: %q", got)
	}
}

func TestApplyWallpaperBlock_ReplacesOld(t *testing.T) {
	old := "a{}\n\n" + wallpaperBegin + "\nOLD CONTENT\n" + wallpaperEnd + "\nb{}\n"
	got := applyWallpaperBlock(old, "/wallpapers/new.jpg", 0.35)
	if strings.Contains(got, "OLD CONTENT") {
		t.Errorf("旧壁纸块未被替换: %q", got)
	}
	if n := strings.Count(got, wallpaperBegin); n != 1 {
		t.Errorf("替换后标记块应只出现一次，实际 %d 次:\n%s", n, got)
	}
	if !strings.Contains(got, "/wallpapers/new.jpg") {
		t.Errorf("新壁纸 url 未写入")
	}
	// 旧块前后的内容都要保留
	if !strings.Contains(got, "a{}") || !strings.Contains(got, "b{}") {
		t.Errorf("替换破坏了周边内容:\n%s", got)
	}
}

func TestApplyWallpaperBlock_NoURL(t *testing.T) {
	base := "a{}"
	got := applyWallpaperBlock(base, "", 0.35)
	if strings.Contains(got, wallpaperBegin) {
		t.Errorf("url 为空时不应注入壁纸块: %q", got)
	}
	if strings.TrimSpace(got) != "a{}" {
		t.Errorf("url 为空时应原样返回: %q", got)
	}
}

func TestApplyWallpaperBlock_DimClamp(t *testing.T) {
	got := applyWallpaperBlock("a{}", "/w.jpg", 5.0)
	if strings.Contains(got, "rgba(255,255,255,5.00)") {
		t.Errorf("dim 应被钳制到 0.9:\n%s", got)
	}
	if !strings.Contains(got, "0.90") {
		t.Errorf("钳制后应写入 0.90:\n%s", got)
	}
}