package color_test

import (
	"fmt"
	"io"
	"testing"

	"git.akyoto.dev/go/assert"
	"git.akyoto.dev/go/color"
)

func TestNoColors(t *testing.T) {
	color.Terminal = false
	testRGBColors(t)
	testLCHColors(t)
}

func TestColors(t *testing.T) {
	color.Terminal = true
	testRGBColors(t)
	testLCHColors(t)
}

func TestRainbow(t *testing.T) {
	color.Terminal = true

	for chroma := range 5 {
		for lightness := range 21 {
			for hue := range 80 {
				c := color.LCH(color.Value(lightness)*0.05, color.Value(chroma)*0.05, color.Value(hue)*4.5)
				c.Print("█")
			}

			fmt.Println()
		}

		fmt.Println()
	}
}

func testRGBColors(t *testing.T) {
	rgbColors := map[string]color.Color{
		"RGB.black": color.RGB(0.0, 0.0, 0.0),
		"RGB.white": color.RGB(1.0, 1.0, 1.0),
		"RGB.red":   color.RGB(1.0, 0.0, 0.0),
		"RGB.green": color.RGB(0.0, 1.0, 0.0),
		"RGB.blue":  color.RGB(0.0, 0.0, 1.0),
	}

	for name, c := range rgbColors {
		testColor(t, c, name)
	}
}

func testLCHColors(t *testing.T) {
	lchColors := map[string]color.Color{
		"LCH.black": color.LCH(0.0, 0.0, 0.0),
		"LCH.white": color.LCH(1.0, 0.0, 0.0),
		"LCH.red":   color.LCH(0.6, 0.5, 20.0),
		"LCH.green": color.LCH(0.6, 0.5, 161.0),
		"LCH.blue":  color.LCH(0.6, 0.5, 240.0),
	}

	for name, c := range lchColors {
		testColor(t, c, name)
	}
}

func testColor(t *testing.T, c color.Color, name string) {
	assert.True(t, c.R >= 0.0)
	assert.True(t, c.G >= 0.0)
	assert.True(t, c.B >= 0.0)

	assert.True(t, c.R <= 1.0)
	assert.True(t, c.G <= 1.0)
	assert.True(t, c.B <= 1.0)

	c.Fprint(io.Discard, name)
	c.Print(name)
	c.Println(name)
}