package main

import (
	"image/color"
	"machine"
	"time"

	"tinygo.org/x/drivers/ws2812"
)

const (
	Red = iota
	Green
	Blue
	Yellow
	Cyan
	Purple
	White
	Off
)

var colors = [...]color.RGBA{
	{255, 0, 0, 255},     // Red
	{0, 255, 0, 255},     // Green
	{0, 0, 255, 255},     // Blue
	{255, 255, 0, 255},   // Yellow
	{0, 255, 255, 255},   // Cyan
	{255, 0, 255, 255},   // Purple
	{255, 255, 255, 255}, // White
	{0, 0, 0, 255},       // Off
}

func main() {

	// WS2812 LEDs are on pin P1_11
	neo := machine.P1_11
	neo.Configure(machine.PinConfig{Mode: machine.PinOutput})

	leds := ws2812.New(neo)
	ledColors := make([]color.RGBA, 2)

	// buttons: active LOW (internal pull-up)
	btnA := machine.P1_06
	btnB := machine.P1_04
	btnRot := machine.P0_22 // rotary encoder push button
	btnA.Configure(machine.PinConfig{Mode: machine.PinInputPullup})
	btnB.Configure(machine.PinConfig{Mode: machine.PinInputPullup})
	btnRot.Configure(machine.PinConfig{Mode: machine.PinInputPullup})

	c := Off
	for {
		if !btnA.Get() {
			c = Red
		}
		if !btnB.Get() {
			c = Blue
		}
		if !btnRot.Get() {
			c = Green
		}

		for i := range ledColors {
			ledColors[i] = colors[c]
		}

		leds.WriteColors(ledColors)
		time.Sleep(30 * time.Millisecond)
	}
}