/*
 * Author: Constantin Musca <constantin.musca@intel.com>
 * Copyright (c) 2016 Intel Corporation.
 *
 * 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.
 */

#include <stdlib.h>
#include <peripheralmanager/peripheral_manager_client.h>
#include <peripheralmanager/gpio.h>

// API
#include "mraa/gpio.h"

// mraa internals
#include "mraa_internal.h"

extern BPeripheralManagerClient *client;
extern char **gpios;
extern int gpios_count;

mraa_gpio_context
mraa_gpio_init_raw(int pin)
{
    return NULL;
}

mraa_gpio_context
mraa_gpio_init(int pin)
{
    mraa_gpio_context dev;
    int rc;

    if (pin > gpios_count) {
        // invalid pin number specified
        return NULL;
    }

    if ((dev = (mraa_gpio_context)calloc(sizeof(struct _gpio), 1)) == NULL) {
        return NULL;
    }

    rc = BPeripheralManagerClient_openGpio(client, gpios[pin], &dev->bgpio);
    if (rc != 0) {
        free(dev);
        return NULL;
    }
    dev->pin = pin;

    return dev;
}

mraa_result_t
mraa_gpio_close(mraa_gpio_context dev)
{
    if (dev->bgpio != NULL) {
        BGpio_delete(dev->bgpio);
    }

    free(dev);
    return MRAA_SUCCESS;
}

mraa_result_t
mraa_gpio_dir(mraa_gpio_context dev, mraa_gpio_dir_t dir)
{
    int rc;

    if (dev->bgpio == NULL) {
        return MRAA_ERROR_INVALID_HANDLE;
    }

    switch (dir) {
        case MRAA_GPIO_IN:
            rc = BGpio_setDirection(dev->bgpio, DIRECTION_IN);
            break;
        case MRAA_GPIO_OUT:
        case MRAA_GPIO_OUT_HIGH:
            rc = BGpio_setDirection(dev->bgpio, DIRECTION_OUT_INITIALLY_HIGH);
            break;
        case MRAA_GPIO_OUT_LOW:
            rc = BGpio_setDirection(dev->bgpio, DIRECTION_OUT_INITIALLY_LOW);
            break;
    }
    if (rc != 0) {
        return MRAA_ERROR_INVALID_HANDLE;
    }

    return MRAA_SUCCESS;
}

mraa_result_t
mraa_gpio_read_dir(mraa_gpio_context dev, mraa_gpio_dir_t *dir)
{
    syslog(LOG_WARNING, "gpio mraa: function not implemented in PMRAA\n");
    return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
}

mraa_result_t
mraa_gpio_write(mraa_gpio_context dev, int val)
{
    int rc;

    if (dev->bgpio == NULL) {
        return MRAA_ERROR_INVALID_HANDLE;
    }

    rc = BGpio_setValue(dev->bgpio, val);
    if (rc != 0) {
        return MRAA_ERROR_INVALID_RESOURCE;
    }

    return MRAA_SUCCESS;
}

int
mraa_gpio_read(mraa_gpio_context dev)
{
    int rc, val;

    if (dev->bgpio == NULL) {
        return -1;
    }

    rc = BGpio_getValue(dev->bgpio, &val);
    if (rc != 0) {
        return -1;
    }

    return val;
}

mraa_result_t
mraa_gpio_edge_mode(mraa_gpio_context dev, mraa_gpio_edge_t mode)
{
    int rc;

    if (dev->bgpio == NULL) {
        return MRAA_ERROR_INVALID_HANDLE;
    }

    switch (mode) {
        case MRAA_GPIO_EDGE_BOTH:
            rc = BGpio_setEdgeTriggerType(dev->bgpio, BOTH_EDGE);
            break;
        case MRAA_GPIO_EDGE_FALLING:
            rc = BGpio_setEdgeTriggerType(dev->bgpio, FALLING_EDGE);
            break;
        case MRAA_GPIO_EDGE_RISING:
            rc = BGpio_setEdgeTriggerType(dev->bgpio, RISING_EDGE);
            break;
        case MRAA_GPIO_EDGE_NONE:
            rc = BGpio_setEdgeTriggerType(dev->bgpio, NONE_EDGE);
            break;
    }
    if (rc != 0) {
        return MRAA_ERROR_INVALID_HANDLE;
    }

    return MRAA_SUCCESS;
};

mraa_result_t
mraa_gpio_isr(mraa_gpio_context dev, mraa_gpio_edge_t edge, void (*fptr)(void*), void* args)
{
    return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
}

mraa_result_t
mraa_gpio_isr_exit(mraa_gpio_context dev)
{
    return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
}

mraa_result_t
mraa_gpio_owner(mraa_gpio_context dev, mraa_boolean_t own)
{
    syslog(LOG_WARNING, "gpio mraa: function not implemented in PMRAA");
    return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
}

mraa_result_t
mraa_gpio_mode(mraa_gpio_context dev, mraa_gpio_mode_t mode)
{
    return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
}

mraa_result_t
mraa_gpio_use_mmaped(mraa_gpio_context dev, mraa_boolean_t mmap_en)
{
    syslog(LOG_WARNING, "gpio mraa: function not implemented in PMRAA");
    return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
}

int
mraa_gpio_get_pin(mraa_gpio_context dev)
{
    return dev->pin;
}
int
mraa_gpio_get_pin_raw(mraa_gpio_context dev)
{
    syslog(LOG_WARNING, "mraa: function not implemented in PMRAA");
    return -1;
}