/*
    ledcontroller-3bit

    This file is a fork of the LedController code. You will find
    the original copyright notice below.

    Copyright (C) 2013 andmarios - http://www.andmarios.com

    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 3 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, see <http://www.gnu.org/licenses/>.


    Original Copyright Notice:

    LedController
    Copyright (C) 2011  jmrobles - http://robleshermoso.wordpress.com

    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 3 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, see <http://www.gnu.org/licenses/>.
*/


#include <stdio.h>
#include <libusb.h>
#include <errno.h>
#include <string.h>

#define VID 0x1294
#define PID 0x1320


static struct libusb_device_handle *devh = NULL;

int main(int argc, char **argv)
{
    int ret;
    unsigned char code = 0;
    if (argc != 2) {
	printf
	    ("Syntax: %s blue | red | green | aqua | purple | yellow | white |  off\n",
	     argv[0]);
	return -1;

    }

/*
    The device has a RGB LED, which has two states for each "sub-LED",
    on and off.
    The "sub-LEDs" are red, green and blue.

    Obviously there are 8 possible combinations for their state.
    It seems there aren't bits mapped to each sub-LED, but instead
    3-bit values mapped to the 8 combinations.

    R G B Color  Value
    0 0 0 off    0x0
    0 0 1 blue   0x1
    1 0 0 red    0x2
    0 1 0 green  0x3
    0 1 1 aqua   0x4
    1 0 1 purple 0x5
    1 1 0 yellow 0x6 (more of a mustard - green color)
    1 1 1 white  0x7 (a very blue-ish white)
*/
    if (strcmp(argv[1], "blue") == 0) {
	code = 1;
    } else if (strcmp(argv[1], "red") == 0) {
	code = 2;
    } else if (strcmp(argv[1], "green") == 0) {
	code = 3;
    } else if (strcmp(argv[1], "aqua") == 0) {
	code = 4;
    } else if (strcmp(argv[1], "purple") == 0) {
	code = 5;
    } else if (strcmp(argv[1], "yellow") == 0) {
	code = 6;
    } else if (strcmp(argv[1], "white") == 0) {
	code = 7;
    } else {
	printf("invalid color\n");
	return -1;
    }

    libusb_init(NULL);
    devh = libusb_open_device_with_vid_pid(NULL, VID, PID);
    if (devh == NULL) {
	printf("not found\n");
	return -1;
    }

    if (libusb_kernel_driver_active(devh, 0)) {
	printf("detach from kernel\n");
	ret = libusb_detach_kernel_driver(devh, 0);
	if (ret < 0) {
	    printf("can't detach\n");
	    return -1;
	}
    }

    char data[5];
    data[0] = code;
    data[1] = 0x4;
    data[2] = 0x4;
    data[3] = 0x4;
    data[4] = 0x4;

    int dummy;
    libusb_claim_interface(devh, 0);
    ret = libusb_interrupt_transfer(devh, 0x2, data, 5, &dummy, 0);
    if (ret < 0) {
	perror("error");
    }


    return 0;
}