package led

import (
	"sync"
	"time"
)

const (
	DurationFlick = 40 * time.Millisecond
)

type LEDController struct {
	led1 bool
	led2 bool
	mu1  sync.Mutex
	mu2  sync.Mutex
}

func NewLEDController() *LEDController {

	var controller LEDController
	controller.led1 = false
	controller.led2 = false

	return &controller
}

// turn both off
func (c *LEDController) Off() {

	c.led1 = true
	c.led2 = true

	c.Disable1()
	c.Disable2()
}

func (c *LEDController) Enable1() {

	if c.led1 {
		return
	}

	c.led1 = true

	// gpio code to turn LED 1 on
}

func (c *LEDController) Enable2() {

	if c.led2 {
		return
	}

	c.led2 = true

	// gpio code to turn LED 2 on
}

func (c *LEDController) Disable1() {

	if !c.led1 {
		return
	}

	c.led1 = false

	// gpio code to turn LED 1 off
}

func (c *LEDController) Disable2() {

	if !c.led2 {
		return
	}

	c.led2 = false

	// gpio code to turn LED 2 off
}

func (c *LEDController) Flick1() {
	c.mu1.Lock()
	defer c.mu1.Unlock()

	// assume it is off
	c.Enable1()
	time.Sleep(DurationFlick)
	c.Disable1()
}

func (c *LEDController) Flick2() {
	c.mu2.Lock()
	defer c.mu2.Unlock()

	// assume it is off
	c.Enable2()
	time.Sleep(DurationFlick)
	c.Disable2()
}