package rgbled

import (
	"fmt"

	"github.com/volker-raschek/flucky/pkg/types"
	"github.com/stianeikeland/go-rpio"
)

// DefaultRGBLED is a RGBLED which implement all functions of the interface
// RGBLED
type DefaultRGBLED struct {
	*types.RGBLED
}

// Blue makes the RGBLED shine in blue
func (rgbled *DefaultRGBLED) Blue() error {
	gpios := []*types.GPIO{
		rgbled.BaseColorsToGPIO[types.BaseColorBlue],
	}

	if err := rgbled.Off(); err != nil {
		return err
	}

	if err := rgbled.switchColors(gpios, true); err != nil {
		return fmt.Errorf("Can not operate with GPIOs: %v", err)
	}

	return nil
}

// Green makes the RGBLED shine in green
func (rgbled *DefaultRGBLED) Green() error {

	gpios := []*types.GPIO{
		rgbled.BaseColorsToGPIO[types.BaseColorGreen],
	}

	if err := rgbled.Off(); err != nil {
		return err
	}

	if err := rgbled.switchColors(gpios, true); err != nil {
		return fmt.Errorf("Can not operate with GPIOs: %v", err)
	}

	return nil

}

// Off turns on the RGBLED off
func (rgbled *DefaultRGBLED) Off() error {

	gpios := []*types.GPIO{
		rgbled.BaseColorsToGPIO[types.BaseColorBlue],
		rgbled.BaseColorsToGPIO[types.BaseColorGreen],
		rgbled.BaseColorsToGPIO[types.BaseColorRed],
	}

	if err := rgbled.switchColors(gpios, false); err != nil {
		return fmt.Errorf("Can not turn GPIOs off: %v", err)
	}

	return nil
}

// On turns on the RGBLED
func (rgbled *DefaultRGBLED) On() error {
	return rgbled.White()
}

// Purple makes the RGBLED shine in purple
func (rgbled *DefaultRGBLED) Purple() error {
	gpios := []*types.GPIO{
		rgbled.BaseColorsToGPIO[types.BaseColorBlue],
		rgbled.BaseColorsToGPIO[types.BaseColorRed],
	}

	if err := rgbled.Off(); err != nil {
		return err
	}

	if err := rgbled.switchColors(gpios, true); err != nil {
		return fmt.Errorf("Can not operate with GPIOs: %v", err)
	}

	return nil
}

// Red makes the RGBLED shine in red
func (rgbled *DefaultRGBLED) Red() error {
	gpios := []*types.GPIO{
		rgbled.BaseColorsToGPIO[types.BaseColorRed],
	}

	if err := rgbled.Off(); err != nil {
		return err
	}

	if err := rgbled.switchColors(gpios, true); err != nil {
		return fmt.Errorf("Can not operate with GPIOs: %v", err)
	}

	return nil
}

// Turquoise makes the RGBLED shine in turquoise
func (rgbled *DefaultRGBLED) Turquoise() error {
	gpios := []*types.GPIO{
		rgbled.BaseColorsToGPIO[types.BaseColorBlue],
		rgbled.BaseColorsToGPIO[types.BaseColorGreen],
	}

	if err := rgbled.Off(); err != nil {
		return err
	}

	if err := rgbled.switchColors(gpios, true); err != nil {
		return fmt.Errorf("Can not operate with GPIOs: %v", err)
	}

	return nil
}

// White makes the RGBLED shine in white
func (rgbled *DefaultRGBLED) White() error {
	gpios := []*types.GPIO{
		rgbled.BaseColorsToGPIO[types.BaseColorBlue],
		rgbled.BaseColorsToGPIO[types.BaseColorGreen],
		rgbled.BaseColorsToGPIO[types.BaseColorRed],
	}

	if err := rgbled.Off(); err != nil {
		return err
	}

	if err := rgbled.switchColors(gpios, true); err != nil {
		return fmt.Errorf("Can not operate with GPIOs: %v", err)
	}

	return nil
}

// Yellow makes the RGBLED shine in yellow
func (rgbled *DefaultRGBLED) Yellow() error {
	gpios := []*types.GPIO{
		rgbled.BaseColorsToGPIO[types.BaseColorGreen],
		rgbled.BaseColorsToGPIO[types.BaseColorRed],
	}

	if err := rgbled.Off(); err != nil {
		return err
	}

	if err := rgbled.switchColors(gpios, true); err != nil {
		return fmt.Errorf("Can not operate with GPIOs: %v", err)
	}

	return nil
}

// Error makes the RGBLED shine in the error specified color
func (rgbled *DefaultRGBLED) Error() error {
	return rgbled.switchColorBasedOnAction(rgbled.ActionMapping[types.LEDActionError])
}

// Logfile makes the RGBLED shine in the logfile specified color
func (rgbled *DefaultRGBLED) Logfile() error {
	return rgbled.switchColorBasedOnAction(rgbled.ActionMapping[types.LEDActionLogfile])
}

// Sync makes the RGBLED shine in the sync specified color
func (rgbled *DefaultRGBLED) Sync() error {
	return rgbled.switchColorBasedOnAction(rgbled.ActionMapping[types.LEDActionSync])
}

// Warn makes the RGBLED shine in the warn specified color
func (rgbled *DefaultRGBLED) Warn() error {
	return rgbled.switchColorBasedOnAction(rgbled.ActionMapping[types.LEDActionWarn])
}

// Run makes the RGBLED shine in the run specified color
func (rgbled *DefaultRGBLED) Run() error {
	return rgbled.switchColorBasedOnAction(rgbled.ActionMapping[types.LEDActionRun])
}

func (rgbled *DefaultRGBLED) switchColors(gpios []*types.GPIO, on bool) error {
	if err := rpio.Open(); err != nil {
		return fmt.Errorf("Cam not open rpio connection: %v", err)
	}
	defer rpio.Close()

	for _, gpio := range gpios {
		gpioInt, err := types.GPIOToInt(*gpio)
		if err != nil {
			return fmt.Errorf("Can not determine %v into integer: %v", gpio, err)
		}

		pin := rpio.Pin(gpioInt)

		// if rpio.DetectEdge(rpio.P rpio.AnyEdge) {
		// 	log.Println("Test")
		// }

		pin.Pull(rpio.PullOff)
		pin.Output()

		if on {
			pin.High()
		} else {
			pin.Low()
		}
	}
	return nil
}

func (rgbled *DefaultRGBLED) switchColorBasedOnAction(action types.LEDColor) error {
	switch action {
	case types.LEDColorBlue:
		return rgbled.Blue()
	case types.LEDColorGreen:
		return rgbled.Green()
	case types.LEDColorNone:
		return rgbled.Off()
	case types.LEDColorPurple:
		return rgbled.Purple()
	case types.LEDColorRed:
		return rgbled.Red()
	case types.LEDColorTurquoise:
		return rgbled.Turquoise()
	case types.LEDColorWhite:
		return rgbled.White()
	case types.LEDColorYellow:
		return rgbled.Yellow()
	default:
		return rgbled.Off()
	}
}