/*

  Copyright 2008 Nathan Phillip Brink, Ethan Zonca, Matt Orlando

  This file is a part of DistRen.

  DistRen is free software: you can redistribute it and/or modify

  it under the terms of the GNU Affero General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  DistRen 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 Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License

  along with DistRen.  If not, see <http://www.gnu.org/licenses/>.

*/

/* Ideas for php-side stuff:

 *

 * PHP adds the users... has captcha and email confirmation wth a pseudo-random number that

 * the user must enter on the site. Apache should be running mod_peruser for safety, and I'm

 * thinking zserver2 for web serving for convenience...

 */

#include <distren.h>

#include <stdio.h> /* sprintf, printf */

#include <stdlib.h> /* malloc, free */

#include <unistd.h> /* getopt */

#include <confuse.h>

#include <string.h> // for strcat

int main(int argc, char *argv[])

{

  char *input;

  char *output;

  char *jobid;

  char curopt;

  distren_t distren;

  distren_job_t distren_job;

  input = NULL;

  output = NULL;

  while(-1 != (curopt = getopt(argc, argv, "i:o:h")))

    {

      if(curopt == ':')

	{

	  fprintf(stderr, "-%c: is missing an argument\n", optopt);

	  return 1;

	}

      else if(curopt == '?')

	{

	  fprintf(stderr, "-%c: invalid option specified\n", optopt);

	  return 1;

	}

      else if(curopt == 'h')

	{

	  fprintf(stderr, "Usage: %s -i <inputfile> -o <outputfile>\n", argv[0]);

	  fprintf(stderr, "\t-i\tSpecifies the input file\n\

\t-o\tSpecifies the output file\n\

\t-h\tShows this help message\n");

	  /*

	    don't return here because options_init will have an overall

	    options help page

	  */

	}

      else if(curopt == 'i')

	/*

	   TODO: is strdup good or bad? what about

	   the idea that all libs should allow plugging different

	   malloc/free implementations in?

	 */

	input = strdup(optarg);

      else if(curopt == 'o')

	output = strdup(optarg);

    }

  /*

     give this error after the general arguments parsing so that

     the general help from options_init can have effect

  */

  if(!input

     || !output)

    {

      fprintf(stderr, "Input and output files must be specified\n");

      return 1;

    }

  fprintf(stderr, "reading from %s\nwriting to %s\n", input, output);

  if(distren_init_mf(&distren, &malloc, &free))

    {

      fprintf(stderr, "error initializing distren handle\n");

      return 1;

    }

  if(distren_submit_file(distren, &distren_job, input))

    {

      fprintf(stderr, "error submitting file\n");

      return 1;

    }

  if(distren_job_getid(distren_job, &jobid))

    {

      fprintf(stderr, "error retrieving job id\n");

      return 1;

    }

  fprintf(stdout, "jobid: %s\n", jobid);

  if(distren_job_retrieve_file(distren_job, output))

    {

      fprintf(stderr, "error retrieving output file\n");

      return 1;

    }

  /* if these following lines fail, it'll be reported as a core dump ;-) */

  distren_job_free(distren_job);

  distren_free(distren);

// !!! Killed for now because I'm doing other randomness !!! //

  // Please find a better way of doing this :( you can't strcat multiple strings.. meh

  // use something like sprintf

  //char *username = cfg_getstr(cfg, "username");

  //char *hostname = cfg_getstr(cfg, "hostname");

  //strcat(username, "@");

  //strcat(username, hostname);

  // SSH's to client machine with the username speficied.

  /*

    char buf[10];

    struct execio *testrem;

    char *execargv[] =

      {

	"ssh",

	"username", //cfg_getstr(cfg, "username") . "@" . cfg_getstr(cfg, "hostname"),

	"-i guest.rsa", //yeaaaah any better ideas?

	"sh",

	"-c",

	"\"echo hello from ${HOSTNAME}\"", // "\"useradd -M -c" strcat( cfg_getstr(cfg, "name") cfg_getstr(cfg, "email")) "-d /home/distren --gid 537" cfg_getstr(cfg, "username") "\"",

	(char *)NULL

      };

    size_t readlen;

    fprintf(stderr, "execio madness is occuring!");

    fprintf(stderr, "execio_open returns %d\n", execio_open(&testrem, "ssh", execargv));

    buf[9] = '\0';

*/

    /*

    while(!execio_read(testrem, buf, 9, &readlen))

      {

	if(readlen > 9 )

	  {

	    fprintf(stderr, "execio_read doesn't set readlen correctly or read() is messed up\n");

	    return 1;

	  }

	buf[readlen] = '\0';

	fprintf(stderr, "read \"%s\"\n", buf);

      }

    execio_close(testrem);

    */

  // Can we prune off some of this code up here^? I'm not exactly sure how execio returns output, but it seems like more could be happening in execio itself, and less happening where it is actually called.

  // We need some code to ssh, and if the SSH fails, tell the user to register.

  // Killed the user reg code, as the php interface will take care of this. Although it should check for users...

  // ------------------------------

  // Ok, this is just to do something to keep distren aliveish... Kill if needed/wanted/meh'd. Borrowed some code from matt's blender.c

// Vars to fill:

    int os=1;

    unsigned int frame_to_render; // initialize this somewhere else...

    frame_to_render = 10; // temporary, the number 10 will be replaced with a function call

    char *filename;

    // Placeholders? figure out what the last one is...

    char *format = "%s -b \"%s\" -o %s -f %d -F JPEG -x 1",bin,input,output; /* the format string to pass to sprintf */

     size_t blenderstrlen;

     // This seems pretty ridik. Just sayin'. We gotta switch this up.

     blenderstrlen = strlen(format) - 2 * 2 /* format string minus placeholders */ + strlen(filename) + intstrlen(frame_to_render) + 1 /* NULL terminator */;

     char *blendercmd = malloc(blenderstrlen);

     snprintf(blendercmd, blenderstrlen, format, filename, frame_to_render);

     fprintf(stderr, "will run job num. %s ``%s''\n",jobid,blendercmd);

     free(blendercmd);

  // -------------End cruddy code that will eventually compose blender.c-----------------

 return 0;

};