package ui

import (
	"image/color"
	"testing"

	"fyne.io/fyne/v2/test"
)

// nrgba 把颜色转成不透明的 NRGBA，便于直接比较。
func nrgba(c color.Color) color.NRGBA {
	return color.NRGBAModel.Convert(c).(color.NRGBA)
}

func TestBubbleColorsFollowTheme(t *testing.T) {
	test.NewApp()

	applyThemeMode(ThemeContrast)
	darkBot := nrgba(colorFor(bubbleBot))
	darkErr := nrgba(colorFor(bubbleError))
	darkBorder := nrgba(borderFor(bubbleUser))
	darkStrong := nrgba(borderFor(bubbleError))

	// 黑白主题：气泡底色应贴近纯黑，文字侧仍是纯白前景。
	if darkBot.R > 0x30 {
		t.Fatalf("黑白主题下助手气泡应贴近纯黑，实际 %v", darkBot)
	}
	if darkStrong.R != 0xFF {
		t.Fatalf("黑白主题下错误气泡描边应为纯白，实际 %v", darkStrong)
	}
	if darkBorder.R >= darkStrong.R {
		t.Fatalf("错误描边应比普通描边更亮：普通 %v，错误 %v", darkBorder, darkStrong)
	}

	applyThemeMode(ThemeLight)
	lightBot := nrgba(colorFor(bubbleBot))
	lightErr := nrgba(colorFor(bubbleError))
	lightStrong := nrgba(borderFor(bubbleError))

	if lightBot.R < 0xD0 {
		t.Fatalf("浅色主题下助手气泡应贴近纯白，实际 %v", lightBot)
	}
	if lightStrong.R != 0x00 {
		t.Fatalf("浅色主题下错误气泡描边应为纯黑，实际 %v", lightStrong)
	}
	if lightBot.R == darkBot.R {
		t.Fatal("切换主题后气泡底色应发生变化")
	}
	if lightErr.R == darkErr.R {
		t.Fatal("切换主题后错误气泡底色应发生变化")
	}
}

func TestChatViewRethemeRepaintsBubbles(t *testing.T) {
	test.NewApp()
	applyThemeMode(ThemeContrast)

	c := newChatView()
	b := newBubble("助手", bubbleBot)
	c.appendBubble(b)

	before := nrgba(b.bg.FillColor)
	beforeStroke := nrgba(b.bg.StrokeColor)

	applyThemeMode(ThemeLight)
	c.retheme()

	after := nrgba(b.bg.FillColor)
	afterStroke := nrgba(b.bg.StrokeColor)
	if before == after {
		t.Fatalf("换肤后气泡底色应改变：%v -> %v", before, after)
	}
	if beforeStroke == afterStroke {
		t.Fatalf("换肤后气泡描边应改变：%v -> %v", beforeStroke, afterStroke)
	}
	if after != nrgba(colorFor(bubbleBot)) {
		t.Fatalf("换肤后底色应与当前主题一致：%v != %v", after, nrgba(colorFor(bubbleBot)))
	}
}