// Various ways to generate single random colors

package colorful

import (
	"math/rand"
)

// Creates a random dark, "warm" color through a restricted HSV space.
func FastWarmColor() Color {
	return Hsv(
		rand.Float64()*360.0,
		0.5+rand.Float64()*0.3,
		0.3+rand.Float64()*0.3)
}

// Creates a random dark, "warm" color through restricted HCL space.
// This is slower than FastWarmColor but will likely give you colors which have
// the same "warmness" if you run it many times.
func WarmColor() (c Color) {
	for c = randomWarm(); !c.IsValid(); c = randomWarm() {
	}
	return
}

func randomWarm() Color {
	return Hcl(
		rand.Float64()*360.0,
		0.1+rand.Float64()*0.3,
		0.2+rand.Float64()*0.3)
}

// Creates a random bright, "pimpy" color through a restricted HSV space.
func FastHappyColor() Color {
	return Hsv(
		rand.Float64()*360.0,
		0.7+rand.Float64()*0.3,
		0.6+rand.Float64()*0.3)
}

// Creates a random bright, "pimpy" color through restricted HCL space.
// This is slower than FastHappyColor but will likely give you colors which
// have the same "brightness" if you run it many times.
func HappyColor() (c Color) {
	for c = randomPimp(); !c.IsValid(); c = randomPimp() {
	}
	return
}

func randomPimp() Color {
	return Hcl(
		rand.Float64()*360.0,
		0.5+rand.Float64()*0.3,
		0.5+rand.Float64()*0.3)
}