package tins2021

import (
	"image/color"

	"github.com/lucasb-eyer/go-colorful"
)

var Blue = `#499BFF`
var Gray = `#E5E5E5`
var Green = `#9BFF49`
var Orange = `#FF9849`
var Purple = `#9E49FF`
var Red = `#FF4949`
var Yellow = `#FFEF49`

func Darken(hexColor string, lighten float64) string { return Lighten(hexColor, -lighten) }

func Lighten(hexColor string, lighten float64) string {
	color := mustHexColor(hexColor)
	h, c, l := color.Hcl()
	lightened := colorful.Hcl(h, c, Clamp(l+lighten)).Clamped()
	return lightened.Hex()
}

func mustHexColor(s string) colorful.Color {
	c, err := colorful.Hex(s)
	if err != nil {
		panic("invalid color")
	}
	return c
}

func MustHexColor(s string) color.Color { return mustHexColor(s) }