/*
 * This file is Copyright (c) 2010 by the GPSD project
 * BSD terms apply: see the file COPYING in the distribution root for details.
 */
#include <math.h>
#include <time.h>

#include "gpsd.h"
#include "bits.h"
#include "gpsmon.h"

#ifdef UBX_ENABLE
#include "driver_ubx.h"
extern const struct gps_type_t ubx_binary;
static WINDOW *satwin, *navsolwin, *dopwin;

#define display	(void)mvwprintw
static bool ubx_initialize(void)
{
    int i;

    /*@ -onlytrans @*/
    /* "heavily inspired" by monitor_nmea.c */
    if ((satwin = derwin(devicewin, 19, 28, 0, 0)) == NULL)
	return false;
    (void)wborder(satwin, 0, 0, 0, 0, 0, 0, 0, 0), (void)syncok(satwin, true);
    (void)wattrset(satwin, A_BOLD);
    display(satwin, 1, 1, "Ch PRN  Az  El S/N Flag U");
    for (i = 0; i < 16; i++)
	display(satwin, (int)(i + 2), 1, "%2d", i);
    display(satwin, 18, 7, " NAV_SVINFO ");
    (void)wattrset(satwin, A_NORMAL);
    /*@ -onlytrans @*/

    /* "heavily inspired" by monitor_nmea.c */
    if ((navsolwin = derwin(devicewin, 13, 51, 0, 28)) == NULL)
	return false;
    (void)wborder(navsolwin, 0, 0, 0, 0, 0, 0, 0, 0),
	(void)wattrset(navsolwin, A_BOLD);
    (void)wmove(navsolwin, 1, 1);
    (void)wprintw(navsolwin, "ECEF Pos:");
    (void)wmove(navsolwin, 2, 1);
    (void)wprintw(navsolwin, "ECEF Vel:");

    (void)wmove(navsolwin, 4, 1);
    (void)wprintw(navsolwin, "LTP Pos:");
    (void)wmove(navsolwin, 5, 1);
    (void)wprintw(navsolwin, "LTP Vel:");

    (void)wmove(navsolwin, 7, 1);
    (void)wprintw(navsolwin, "Time:");
    (void)wmove(navsolwin, 8, 1);
    (void)wprintw(navsolwin, "Time GPS:                     Day:");

    (void)wmove(navsolwin, 10, 1);
    (void)wprintw(navsolwin, "Est Pos Err       m Est Vel Err       m/s");
    (void)wmove(navsolwin, 11, 1);
    (void)wprintw(navsolwin, "PRNs: ## PDOP: xx.x Fix 0x.. Flags 0x..");

    display(navsolwin, 12, 20, " NAV_SOL ");
    (void)wattrset(navsolwin, A_NORMAL);

    if ((dopwin = derwin(devicewin, 3, 51, 13, 28)) == NULL)
	return false;
    (void)wborder(dopwin, 0, 0, 0, 0, 0, 0, 0, 0),
	(void)wattrset(dopwin, A_BOLD);
    (void)wmove(dopwin, 1, 1);
    (void)wprintw(dopwin, "DOP [H]      [V]      [P]      [T]      [G]");
    display(dopwin, 2, 20, " NAV_DOP ");
    (void)wattrset(dopwin, A_NORMAL);

    return true;
}

static void display_nav_svinfo(unsigned char *buf, size_t data_len)
{
    int i, nchan;

    if (data_len < 152)
	return;

    nchan = (int)getub(buf, 4);
    if (nchan > 16)
	nchan = 16;

    for (i = 0; i < nchan; i++) {
	int off = 8 + 12 * i;
	unsigned char ss, prn;
	char el;
	short az;
	unsigned short fl;

	prn = (unsigned char)getub(buf, off + 1);
	fl = (unsigned short)getleu16(buf, off + 2);
	ss = (unsigned char)getub(buf, off + 4);
	el = getsb(buf, off + 5);
	az = getles16(buf, off + 6);
	(void)wmove(satwin, (int)(i + 2), 4);
	(void)wprintw(satwin, "%3d %3d %3d  %2d %04x %c",
		      prn, az, el, ss, fl, (fl & UBX_SAT_USED) ? 'Y' : ' ');
    }
    (void)wnoutrefresh(satwin);
    return;
}

/*@ -mustfreeonly -compdestroy @*/
static void display_nav_sol(unsigned char *buf, size_t data_len)
{
    unsigned short gw = 0;
    unsigned int tow = 0, flags;
    double epx, epy, epz, evx, evy, evz;
    unsigned char navmode;
    struct gps_data_t g;
    double separation;

    if (data_len != 52)
	return;

    navmode = (unsigned char)getub(buf, 10);
    flags = (unsigned int)getub(buf, 11);

    if ((flags & (UBX_SOL_VALID_WEEK | UBX_SOL_VALID_TIME)) != 0) {
	tow = (unsigned int)getleu32(buf, 0);
	gw = (unsigned short)getles16(buf, 8);
    }

    epx = (double)(getles32(buf, 12) / 100.0);
    epy = (double)(getles32(buf, 16) / 100.0);
    epz = (double)(getles32(buf, 20) / 100.0);
    evx = (double)(getles32(buf, 28) / 100.0);
    evy = (double)(getles32(buf, 32) / 100.0);
    evz = (double)(getles32(buf, 36) / 100.0);
    ecef_to_wgs84fix(&g.fix, &separation, epx, epy, epz, evx, evy, evz);
    g.fix.epx = g.fix.epy = (double)(getles32(buf, 24) / 100.0);
    g.fix.eps = (double)(getles32(buf, 40) / 100.0);
    g.dop.pdop = (double)(getleu16(buf, 44) / 100.0);
    g.satellites_used = (int)getub(buf, 47);

    (void)wmove(navsolwin, 1, 11);
    (void)wprintw(navsolwin, "%+10.2fm %+10.2fm %+10.2fm", epx, epy, epz);
    (void)wmove(navsolwin, 2, 11);
    (void)wprintw(navsolwin, "%+9.2fm/s %+9.2fm/s %+9.2fm/s", evx, evy, evz);

    (void)wmove(navsolwin, 4, 11);
    (void)wprintw(navsolwin, "%12.9f  %13.9f  %8.2fm",
		  g.fix.latitude, g.fix.longitude, g.fix.altitude);
    (void)mvwaddch(navsolwin, 4, 23, ACS_DEGREE);
    (void)mvwaddch(navsolwin, 4, 39, ACS_DEGREE);
    (void)wmove(navsolwin, 5, 11);
    (void)wprintw(navsolwin, "%6.2fm/s %5.1fo %6.2fm/s",
		  g.fix.speed, g.fix.track, g.fix.climb);
    (void)mvwaddch(navsolwin, 5, 26, ACS_DEGREE);

    (void)wmove(navsolwin, 7, 7);
    /*@ -compdef @*/
    {
	unsigned int day = tow / 8640000;
	unsigned int tod = tow % 8640000;
	unsigned int h = tod / 360000;
	unsigned int m = tod % 360000;
	unsigned int s = m % 6000;

	m = (m - s) / 6000;

	(void)wprintw(navsolwin, "%u %02u:%02u:%05.2f", day, h, m, (double)s / 100);
    }
    /*@ +compdef @*/
    (void)wmove(navsolwin, 8, 11);
    if ((flags & (UBX_SOL_VALID_WEEK | UBX_SOL_VALID_TIME)) != 0) {
	(void)wprintw(navsolwin, "%d+%10.3lf", gw, (double)(tow / 1000.0));
	(void)wmove(navsolwin, 8, 36);
	(void)wprintw(navsolwin, "%d", (tow / 86400000));
    }

    /* relies on the fact that expx and epy are aet to same value */
    (void)wmove(navsolwin, 10, 12);
    (void)wprintw(navsolwin, "%7.2f", g.fix.epx);
    (void)wmove(navsolwin, 10, 33);
    (void)wprintw(navsolwin, "%6.2f", g.fix.epv);
    (void)wmove(navsolwin, 11, 7);
    (void)wprintw(navsolwin, "%2d", g.satellites_used);
    (void)wmove(navsolwin, 11, 15);
    (void)wprintw(navsolwin, "%5.1f", g.dop.pdop);
    (void)wmove(navsolwin, 11, 25);
    (void)wprintw(navsolwin, "0x%02x", navmode);
    (void)wmove(navsolwin, 11, 36);
    (void)wprintw(navsolwin, "0x%02x", flags);
    (void)wnoutrefresh(navsolwin);
}

/*@ +mustfreeonly +compdestroy @*/

static void display_nav_dop(unsigned char *buf, size_t data_len)
{
    if (data_len != 18)
	return;
    (void)wmove(dopwin, 1, 9);
    (void)wprintw(dopwin, "%4.1f", getleu16(buf, 12) / 100.0);
    (void)wmove(dopwin, 1, 18);
    (void)wprintw(dopwin, "%4.1f", getleu16(buf, 10) / 100.0);
    (void)wmove(dopwin, 1, 27);
    (void)wprintw(dopwin, "%4.1f", getleu16(buf, 6) / 100.0);
    (void)wmove(dopwin, 1, 36);
    (void)wprintw(dopwin, "%4.1f", getleu16(buf, 8) / 100.0);
    (void)wmove(dopwin, 1, 45);
    (void)wprintw(dopwin, "%4.1f", getleu16(buf, 4) / 100.0);
    (void)wnoutrefresh(dopwin);
}

static void ubx_update(void)
{
    unsigned char *buf;
    size_t data_len;
    unsigned short msgid;

    buf = session.packet.outbuffer;
    msgid = (unsigned short)((buf[2] << 8) | buf[3]);
    data_len = (size_t) getles16(buf, 4);
    switch (msgid) {
    case UBX_NAV_SVINFO:
	display_nav_svinfo(&buf[6], data_len);
	break;
    case UBX_NAV_DOP:
	display_nav_dop(&buf[6], data_len);
	break;
    case UBX_NAV_SOL:
	display_nav_sol(&buf[6], data_len);
	break;
    default:
	break;
    }

}

static int ubx_command(char line[]UNUSED)
{
    return COMMAND_UNKNOWN;
}

static void ubx_wrap(void)
{
    (void)delwin(satwin);
    return;
}

const struct monitor_object_t ubx_mmt = {
    .initialize = ubx_initialize,
    .update = ubx_update,
    .command = ubx_command,
    .wrap = ubx_wrap,
    .min_y = 23,.min_x = 80,	/* size of the device window */
    .driver = &ubx_binary,
};
#endif
