#ifndef _GPIO_H_
#define _GPIO_H_

#include <unistd.h>
#include <stdint.h>
#include <memory>
#include <ostream>
#include <iostream>
#include "../../config.h"

class Gpio 
{
	public: 
		enum pinMode
		{
			input, 
			output 
		};
		
		enum pinState
		{
			pushPull, 
			openDrain, 
			floating, 
			analog
		};
		
		enum pinPullUpDown
		{
			none, 
			pullUp,
			pullDown
		};

		enum pinSpeed
		{
			slow, 
			normal, 
			fast, 
			veryFast
		};

		enum errors
		{
			pinNotDeclared, 
			pinNotReachable, 
			pinNoPullUpDown, 
			pinNotAnalog, 
			pinNotDigital, 
			pinTooFast, 
			pinBocked, 
			pinAlreadyUsed
		};

		Gpio(); 
		~Gpio(); 

		void setMode(uint8_t gpioNo, pinMode mode); 
		void setOutputState(uint8_t gpioNo, pinState state); 
		void setPullUpDonw(uint8_t gpioNo, pinPullUpDown resistance); 
		void setSpeed(uint8_t gpioNo, pinSpeed speed); 
		void config(uint8_t gpioNo, pinMode mode, pinState state, pinPullUpDown resistance, pinSpeed speed); 
		
		uint8_t readPin(uint8_t gpioNo);
		void writePin(uint8_t gpioNo, uint8_t value);

		uint16_t readRange(uint8_t start, uint8_t stop); 
		void writeRange(uint8_t start, uint8_t stop, uint16_t value); 
	
		void pinBlock(uint8_t gpioNo);
		void pinUnblock(uint8_t gpioNo);

	private:
		void throwError(errors errNo); 	
		class gpioImpl; 
		std::unique_ptr<gpioImpl> gpioPimpl; 
};

#endif //  _GPIO_H_