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/* Camicro - Microscope camera viewer.
 *
 * Copyright (C) 2019 Nicolas Schodet
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * Contact :
 *        Web: http://ni.fr.eu.org/
 *      Email: <nico at ni.fr.eu.org>
 */
#include <stdlib.h>

#include "device.h"
#include "utils.h"

#include "moticam.h"

static const struct device_driver *drivers[] = {
    &moticam_device_driver,
    NULL
};

struct device *
device_open(libusb_context *usb)
{
    libusb_device **list;
    libusb_device *found_usb_device = NULL;
    char *found_device_name = NULL;
    const struct device_driver *found_device_driver = NULL;
    ssize_t cnt = libusb_get_device_list(usb, &list);
    if (cnt < 0)
	utils_fatal("can not list devices: %s", libusb_strerror(cnt));
    for (ssize_t i = 0; i < cnt; i++) {
	libusb_device *usb_device = list[i];
	struct libusb_device_descriptor desc;
	int r = libusb_get_device_descriptor(usb_device, &desc);
	if (r)
	    utils_fatal("can not get device descriptor: %s",
		    libusb_strerror(r));
	for (const struct device_driver **dd = drivers; *dd; dd++) {
	    char *device_name = (*dd)->usb_poll(&desc);
	    if (device_name) {
		if (found_device_name)
		    utils_fatal("more than one matching device, not"
			    " supported");
		else
		{
		    found_usb_device = usb_device;
		    found_device_name = device_name;
		    found_device_driver = *dd;
		}
	    }
	}
    }
    struct device *device = NULL;
    if (found_usb_device) {
	free(found_device_name);
	device = found_device_driver->usb_open(usb, found_usb_device);
    }
    libusb_free_device_list(list, 1);
    return device;
}

const struct device_info *
device_get_info(struct device *device)
{
    return device->get_info(device);
}

void
device_set_exposure(struct device *device, double exposure_ms)
{
    device->set_exposure(device, exposure_ms);
}

void
device_set_gain(struct device *device, double gain)
{
    device->set_gain(device, gain);
}

void
device_set_resolution(struct device *device, int width, int height,
	int stride)
{
    device->set_resolution(device, width, height, stride);
}

void
device_start(struct device *device)
{
    device->start(device);
}

struct image *
device_read(struct device *device)
{
    return device->read(device);
}

void
device_stop(struct device *device)
{
    device->stop(device);
}

void
device_close(struct device *device)
{
    device->close(device);
}