/*************************************************************************
 *  musserver.c
 *
 *  Copyright (C) 1995-1997 Michael Heasley (mheasley@hmc.edu)
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <string.h>
//#if defined(__FreeBSD__) || defined(SCOOS5) || defined(SCOUW2) || defined(SCOUW7)
#  include <errno.h>
//#endif
#include "musserver.h"

#if defined(SCOUW2)
#include "usleep.h"
#endif

extern int use_dev;
extern int seqfd;
extern int mixfd;
unsigned char *musicdata;
int doomver;
int verbose = 0;
int qid;
int changevol = 1;
FILE *infile;
char pproc[20];
#if !defined(SCOOS5)
int pcheck = 1;
#else
int pcheck = 0;
#endif

// readwad.c
extern int read_wad_dir_music(FILE *wadfile, int version);
extern int readmus(int lumpnum);
extern int playmus(char *musdata, unsigned int mussize, int play_once);
extern void seq_setup(int pref_dev, int dev_num);
extern void read_genmidi(FILE *wadfile);
extern void list_devs(void);
extern void cleanup_midi(void);
extern void read_extra_wads(int doomver);
extern void readwad(char *s, int doomver);
extern void fmload(void);


void show_help(void)
{
    printf("Usage: musserver [options]\n\n");
#ifdef AWE32_SYNTH_SUPPORT
    printf("  -a               Use AWE32 synth device for music playback\n");
#endif
    printf("  -c               Do not check whether the parent process is alive\n");
    printf("  -d directory     Look in 'directory' for DOOM wad file\n");
    printf("  -f               Use FM synth device for music playback\n");
    printf("  -h               Print this message and exit\n");
    printf("  -l               List detected music devices and exit\n");
    printf("  -m               Use general midi device for music playback\n");
    printf("  -t number        Timeout after 'number' seconds when getting IPC message\n");
    printf("                   queue id\n");
    printf("  -u number        Use device of type 'number' where 'number' is the type\n");
    printf("                   reported by 'musserver -l'.  Requires -f or -m option.\n");
    printf("  -V               Ignore volume change messages from Doom\n");
    printf("  -v               Verbose\n\n");
}

void cleanup(int status)
{
    struct msqid_ds *dummy;
    
    cleanup_midi();
    dummy = malloc(sizeof(struct msqid_ds));
    msgctl(qid, IPC_RMID, dummy);
    free(dummy);
    fclose(infile);
    exit(status);
}

int main(int argc, char **argv)
{
    int done = 0;
    int lump = -1;
    int intro = 0;
    int introa = 0;
    int result;
    char *wadfilename;
    char *waddir;
    char *iwadname=NULL;
    unsigned int musicsize;
    int x;
    int outtro = 31;
    int opt_dev = 0;
    int num_dev = -1;
    int playarg;
    unsigned int timeout = 1500;
    pid_t ppid;


    ppid = getppid();
    sprintf(pproc, "/proc/%d", (int)ppid);
    if (verbose > 1)
	printf("ppid %d %s\n", ppid, pproc);
    ppid = getpid();
    if (verbose > 1) 
	printf("pid %d %s\n", ppid, pproc);
    waddir = getenv("DOOMWADDIR");
    if (waddir == NULL)
	waddir = ".";

    while ((x = getopt(argc, argv, "acd:fhi:lmt:u:Vv")) != -1)
	switch (x)
	{
#ifdef AWE32_SYNTH_SUPPORT
	case 'a':
	    opt_dev = AWE32_SYNTH;
	    break;
#endif
	case 'c':
	    pcheck = 0;
	    break;
	case 'd':
	    waddir = optarg;
	    break;
	case 'f':
	    opt_dev = FM_SYNTH;
	    break;
	case 'h':
	    show_help();
	    exit(0);
	    break;
	case 'i':
	    iwadname = optarg;
	    break;
	case 'l':
	    list_devs();
	    break;
	case 'm':
	    opt_dev = EXT_MIDI;
	    break;
	case 't':
	    timeout = 5 * atoi(optarg);
	    break;
	case 'u':
	    num_dev = atoi(optarg);
	    break;
	case 'V':
	    changevol = 0;
	    break;
	case 'v':
	    verbose++;
	    break;
	case '?': case ':':
	    show_help();
	    exit(1);
	    break;
	}


    if (!opt_dev)
	opt_dev = DEFAULT_DEV;

#ifdef DEFAULT_TYPE
    if (num_dev == -1)
	num_dev = DEFAULT_TYPE;
#endif
    
    if (verbose > 1)
	printf("musserver version %s\n", MUS_VERSION);

    wadfilename = malloc(strlen(waddir) + strlen("/plutonia.wad") + 1);

    // if an iwad name has been supplied, try it!
    if(iwadname) {
	sprintf(wadfilename, "%s/%s", waddir, iwadname);
	infile = fopen(wadfilename, "r");
	if (infile != NULL) {
	    if(!strcmp(iwadname, "doomu.wad") || 
	       !strcmp(iwadname, "doom.wad")) {
		doomver = 1;
	    }
	    else if(!strcmp(iwadname, "doom1.wad")) {
		doomver = 0;
	    }
	    else {
		doomver = 2;
	    }
	    goto found;
	}
    }
    /*
     * carefull here, the order for looking at the wad files must be the
     * same as in xdoom and sndserver, else it might play the wrong tunes
     */
    sprintf(wadfilename, "%s/doom2.wad", waddir);
    infile = fopen(wadfilename, "r");
    if (infile != NULL) {
	doomver = 2;
	goto found;
    }

    sprintf(wadfilename, "%s/doomu.wad", waddir);
    infile = fopen(wadfilename, "r");
    if (infile != NULL) {
	doomver = 1;
	goto found;
    }

    sprintf(wadfilename, "%s/doom.wad", waddir);
    infile = fopen(wadfilename, "r");
    if (infile != NULL) {
	doomver = 1;
	goto found;
    }

    sprintf(wadfilename, "%s/doom1.wad", waddir);
    infile = fopen(wadfilename, "r");
    if (infile != NULL) {
	doomver = 0;
	goto found;
    }

    sprintf(wadfilename, "%s/plutonia.wad", waddir);
    infile = fopen(wadfilename, "r");
    if (infile != NULL) {
	doomver = 2;
	goto found;
    }

    sprintf(wadfilename, "%s/tnt.wad", waddir);
    infile = fopen(wadfilename, "r");
    if (infile != NULL) {
	doomver = 2;
	goto found;
    }

    sprintf(wadfilename, "%s/doom2f.wad", waddir);
    infile = fopen(wadfilename, "r");
    if (infile != NULL) {
	doomver = 2;
	goto found;
    }

    printf("musserver: game mode indeterminate.\n");
    exit(1);

 found:
    if (verbose)
	switch (doomver)
	{
	case 0:
	    printf("Playing music for shareware DOOM\n");
	    break;
	case 1:
	    printf("Playing music for registered DOOM\n");
	    break;
	case 2:
	    printf("Playing music for DOOM II\n");
	    break;
	}

    switch(doomver)
    {
    case 0: case 1:
	intro = 28;
	introa = 27;
	break;
    case 2:
	intro = 33;
	introa = 100;
	outtro = 100;
	break;
    }

    /* read the wadfile, get music data */
    read_wad_dir_music(infile, doomver);
    if (doomver)	/*  if not shareware doom, scan for external PWADs */
	read_extra_wads(doomver);

    seq_setup(opt_dev, num_dev);

    if (use_dev == FM_SYNTH)
    {
	read_genmidi(infile);
	fmload();
    }

    // According to cph, this makes the device really load the instruments
    // Thanks, Colin!!
    cleanup_midi();
  
    seq_setup(opt_dev, num_dev);

    if (use_dev == FM_SYNTH)
    {
	read_genmidi(infile);
	fmload();
    }

    qid = -1;
    x = 0;
    if (verbose > 1)
	printf("getting message queue id...\n");
    while (qid == -1)
    {
	x++;
	qid = msgget((key_t)53075, 0);
	if (verbose > 1)
	    printf("qid: %d\n",qid);
	if (x > timeout)
	    qid = -2;
	if (qid == -1)
	{
	    if (errno == ENOENT)
		usleep(200000);
	    else
		qid = -2;
	}	
    }
    if (qid == -2)
    {
	if(verbose > 1)
	    printf("musserver: could not get IPC message queue id, exiting.\n");
	cleanup(1);
    }

    printf("musserver: using %s\nmusserver: ready\n", wadfilename);
    free(wadfilename);

    playarg = 2;
    if (verbose > 1)
	printf("Waiting for first message from Doom...\n");
    while (!done)
    {
	qid = msgget((key_t)53075, 0);
	if ((lump == outtro) || (lump == intro) || (lump == introa))
	    playarg = 1;
	else if (lump >= 0)
	    playarg = 0;
	else
	    lump = intro;
	if ((verbose > 1) && (playarg != 2))
	    printf("Playing music resource number %d\n", lump + 1);
	musicsize = readmus(lump);
	result = playmus(musicdata, musicsize, playarg);
	free(musicdata);
	switch (result)
	{
	case TERMINATED:
	    done = 1;
	    if (verbose)
		printf("Terminated\n");
	    break;
	default:
	    if (result >= 500)
		lump = result - 500;
	    else
	    {
		done = 1;
		printf("musserver: unknown error in music playing, exiting\n");
	    }
	    break;
	}
	if (playarg == 2)
	    playarg = 1;
    }

    cleanup(0);

    return 0;
}
