/*
 * libusb example program to list devices on the bus
 * Copyright (C) 2007 Daniel Drake <dsd@gentoo.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <string.h>
#include <strings.h>
#include "../globals.h"
#include "../csctapi/ifd_smartreader_types.h"

#if defined(__FreeBSD__)
#include <libusb.h>
#else
#include <libusb-1.0/libusb.h>
#endif

static void smartreader_check_endpoint(libusb_device *usb_dev, libusb_device_handle *handle)
{
	struct libusb_device_descriptor usbdesc;
	struct libusb_config_descriptor *configDesc;
	int32_t ret;
	int32_t j, k, l;
	uint32_t m;
	uint8_t tmpEndpointAddress;
	int32_t nb_endpoint_ok = 0;
	int32_t busid, devid;
	unsigned char iserialbuffer[128], iproductbuffer[128];
	char *productptr = (char *)iproductbuffer;
	static const char *const typename_str[6] = {"SR", "Infinity", "SRv2", "TripleP1", "TripleP2", "TripleP3"};

	ret = libusb_get_device_descriptor(usb_dev, &usbdesc);
	if(ret < 0)
	{
		printf("Smartreader : couldn't read device descriptor, assuming this is not a smartreader");
		return;
	}
	if(usbdesc.bNumConfigurations)
	{
		ret = libusb_get_active_config_descriptor(usb_dev, &configDesc);
		if(ret)
		{
			printf("Smartreader : couldn't read config descriptor , assuming this is not a smartreader");
			return;
		}
		for(m = 0; m < sizeof(reader_types) / sizeof(struct s_reader_types); ++m)
		{
			nb_endpoint_ok = 0;
			for(j = 0; j < (configDesc->bNumInterfaces); j++)
			{
				for(k = 0; k < configDesc->interface[j].num_altsetting; k++)
				{
					for(l = 0; l < configDesc->interface[j].altsetting[k].bNumEndpoints; l++)
					{
						tmpEndpointAddress = configDesc->interface[j].altsetting[k].endpoint[l].bEndpointAddress;
						if((tmpEndpointAddress == reader_types[m].in_ep || tmpEndpointAddress == reader_types[m].out_ep))
						{
							nb_endpoint_ok++;
						}
					}
				}
			}

			if(nb_endpoint_ok == 2)
			{
				busid = libusb_get_bus_number(usb_dev);
				devid = libusb_get_device_address(usb_dev);
				memset(iserialbuffer, 0, sizeof(iserialbuffer));
				memset(iproductbuffer, 0, sizeof(iproductbuffer));
				libusb_get_string_descriptor_ascii(handle, usbdesc.iSerialNumber, iserialbuffer, sizeof(iserialbuffer));
				libusb_get_string_descriptor_ascii(handle, usbdesc.iProduct, iproductbuffer, sizeof(iproductbuffer));
				if ((!((!strcasecmp(productptr, "Triple Reader+")) && (m == 2))) && (!((!strcasecmp(productptr, "Smartreader2 plus")) && (m == 3)))) {
				printf("bus %03d, device %03d : %04x:%04x %s (type=%s, in_ep=%02x, out_ep=%02x; insert in oscam.server 'device = %s%sSerial:%s')\n",
					   busid, devid,
					   usbdesc.idVendor, usbdesc.idProduct, strlen(productptr) > 0 ? productptr : "Smartreader",
					   typename_str[reader_types[m].rdrtypename], reader_types[m].in_ep, reader_types[m].out_ep,
					   reader_types[m].rdrtypename == 0 ? "" : typename_str[reader_types[m].rdrtypename] , reader_types[m].rdrtypename == 0 ? "" : ";", iserialbuffer
					  );}
			}
		}
	}
}

static void print_devs(libusb_device **devs)
{
	libusb_device *dev;
	libusb_device_handle *handle;
	int32_t i = 0;
	int32_t ret;

	while((dev = devs[i++]) != NULL)
	{
		struct libusb_device_descriptor usbdesc;
		int32_t r = libusb_get_device_descriptor(dev, &usbdesc);
		if(r < 0)
		{
			fprintf(stderr, "failed to get device descriptor");
			return;
		}
		if(usbdesc.idVendor == 0x0403 && (usbdesc.idProduct == 0x6001 || usbdesc.idProduct == 0x6011))
		{
			ret = libusb_open(dev, &handle);
			if(ret)
			{
				printf("couldn't open device %03d:%03d\n", libusb_get_bus_number(dev), libusb_get_device_address(dev));
				continue;
			}
			// check for smargo endpoints.
			smartreader_check_endpoint(dev, handle);

			libusb_close(handle);
		}
	}
}

int32_t main(void)
{
	libusb_device **devs;
	int32_t r;
	ssize_t cnt;

	r = libusb_init(NULL);
	if(r < 0)
		{ return r; }

	printf("Looking for smartreader compatible devices...\n");

	cnt = libusb_get_device_list(NULL, &devs);
	if(cnt < 0)
		{ return (int32_t) cnt; }

	print_devs(devs);
	libusb_free_device_list(devs, 1);

	libusb_exit(NULL);

	return 0;
}