#ifndef SAM9G20_COMIF_COOKIES_GPIO_COOKIE_H_
#define SAM9G20_COMIF_COOKIES_GPIO_COOKIE_H_

#include "GpioIF.h"
#include <fsfw/devicehandlers/CookieIF.h>
#include <fsfw/returnvalues/HasReturnvaluesIF.h>
#include <string>
#include <unordered_map>

namespace gpio {
enum Direction {
    IN = 0,
    OUT = 1
};
}

/**
 * @brief	Struct containing information about the GPIO to use. This is
 * 			required by the libgpiod to access and drive a GPIO.
 * @param chipname	    String of the chipname specifying the group which contains the GPIO to
 *                      access. E.g. gpiochip0. To detect names of GPIO groups run gpiodetect on
 *                      the linux command line.
 * @param lineNum	    The offset of the GPIO within the GPIO group.
 * @param consumer	    Name of the consumer. Simply a description of the GPIO configuration.
 * @param direction     Specifies whether the GPIO should be used as in- or output.
 * @param initValue     Defines the initial state of the GPIO when configured as output.
 *                      Only required for output GPIOs.
 * @param lineHandle    The handle returned by gpiod_chip_get_line will be later written to this
 *                      pointer.
 */
typedef struct GpioConfig {
    GpioConfig(std::string chipname_, int lineNum_, std::string consumer_,
            gpio::Direction direction_, int initValue_):
            chipname(chipname_), lineNum(lineNum_), consumer(consumer_),
            direction(direction_), initValue(initValue_) {}
    std::string chipname;
    int lineNum;
    std::string consumer;
    gpio::Direction direction;
    int initValue;
    struct gpiod_line* lineHandle = nullptr;
} GpioConfig_t;

using GpioMap = std::unordered_map<gpioId_t, GpioConfig_t>;
using GpioMapIter = GpioMap::iterator;

/**
 * @brief   Cookie for the GpioIF. Allows the GpioIF to determine which
 * 			GPIOs to initialize and whether they should be configured as in- or
 * 			output.
 * @details	One GpioCookie can hold multiple GPIO configurations. To add a new
 * 			GPIO configuration to a GpioCookie use the GpioCookie::addGpio
 * 			function.
 *
 * @author 	J. Meier
 */
class GpioCookie: public CookieIF {
public:

    GpioCookie();

    virtual ~GpioCookie();

    void addGpio(gpioId_t gpioId, GpioConfig_t gpioConfig);
    /**
     * @brief	Get map with registered GPIOs.
     */
    GpioMap getGpioMap() const;

private:
    /**
     * Returns a copy of the internal GPIO map.
     */
    GpioMap gpioMap;
};

#endif