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package com.diozero.internal.provider.pi4j;

/*
 * #%L
 * Organisation: mattjlewis
 * Project:      Device I/O Zero - pi4j provider
 * Filename:     Pi4jPwmOutputDevice.java  
 * 
 * This file is part of the diozero project. More information about this project
 * can be found at http://www.diozero.com/
 * %%
 * Copyright (C) 2016 - 2017 mattjlewis
 * %%
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * #L%
 */

import org.pmw.tinylog.Logger;

import com.diozero.api.PwmType;
import com.diozero.internal.provider.AbstractDevice;
import com.diozero.internal.provider.DeviceFactoryInterface;
import com.diozero.internal.provider.PwmOutputDeviceInterface;
import com.diozero.util.RuntimeIOException;
import com.pi4j.io.gpio.GpioController;
import com.pi4j.wiringpi.Gpio;
import com.pi4j.wiringpi.GpioUtil;
import com.pi4j.wiringpi.SoftPwm;

public class Pi4jPwmOutputDevice extends AbstractDevice implements PwmOutputDeviceInterface {
	//private GpioPinPwmOutput pwmOutputPin;
	private int gpio;
	private float value;
	private int range;
	//private Pin pin;
	private PwmType pwmType;
	
	Pi4jPwmOutputDevice(String key, DeviceFactoryInterface deviceFactory, GpioController gpioController,
			PwmType pwmType, int gpio, float initialValue, int range) throws RuntimeIOException {
		super(key, deviceFactory);
		
		this.pwmType = pwmType;
		this.gpio = gpio;
		this.value = initialValue;
		this.range = range;
		
		//pin = RaspiBcmPin.getPinByAddress(gpio);
		//pin.getSupportedPinModes().contains(PinMode.PWM_OUTPUT);
		
		switch (pwmType) {
		case HARDWARE:
			//pwmOutputPin = gpioController.provisionPwmOutputPin(pin, "PWM output for BCM GPIO " + gpio,
			//		Math.round(value * range));
			Gpio.pinMode(gpio, Gpio.PWM_OUTPUT);
			// Have to call this after setting the pin mode! Yuck
			Gpio.pwmSetMode(Gpio.PWM_MODE_MS);
			Gpio.pwmWrite(gpio, Math.round(initialValue * range));
			break;
		case SOFTWARE:
			//pwmOutputPin = gpioController.provisionSoftPwmOutputPin(
			//		pin, "PWM output for BCM GPIO " + gpio, Math.round(initialValue * range));
			int status = SoftPwm.softPwmCreate(gpio, Math.round(initialValue * range), range);
			if (status != 0) {
				throw new RuntimeIOException("Error setting up software controlled PWM GPIO on BCM pin " +
						gpio + ", status=" + status);
			}
		}
	}

	@Override
	protected void closeDevice() {
		Logger.debug("closeDevice()");
		//GpioFactory.getInstance().unprovisionPin(pwmOutputPin);
		switch (pwmType) {
		case HARDWARE:
			GpioUtil.unexport(gpio);
		case SOFTWARE:
			SoftPwm.softPwmStop(gpio);
			GpioUtil.unexport(gpio);
			break;
		default:
		}
	}

	@Override
	public int getGpio() {
		return gpio;
	}
	
	@Override
	public int getPwmNum() {
		return gpio;
	}

	@Override
	public float getValue() {
		return value;
	}

	@Override
	public void setValue(float value) throws RuntimeIOException {
		this.value = value;
		switch (pwmType) {
		case HARDWARE:
			Logger.info("Pi4j Hardware PWM write " + (Math.round(value * range)));
			Gpio.pwmWrite(gpio, Math.round(value * range));
			break;
		case SOFTWARE:
			SoftPwm.softPwmWrite(gpio, Math.round(value * range));
			break;
		}
	}
}