/*

  Copyright 2009 Nathan Phillip Brink, Ethan Zonca, Matthew 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/>.

*/

#include "slavefuncs.h"

#include "common/asprintf.h"

#include "common/options.h"

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/stat.h>

#include <unistd.h>

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

{

  char *datadir;

  char *server;

  char *username;

  char *password; // @TODO: Binki: fill me with confiness

  char *hostname;

  cfg_opt_t myopts[] = {

    CFG_SIMPLE_STR("username", &username),

    CFG_SIMPLE_STR("datadir", &datadir),

    CFG_SIMPLE_STR("server", &server),

    CFG_SIMPLE_STR("hostname", &hostname),

    CFG_END()

  };

  cfg_t * my_cfg;

  struct options_common *commonopts;

  // struct distrenjob *myjob; /* Structure to hold data gathered from the XML file */

  // struct remoteio *comm_slave;

  /**

     initializations

  */

  datadir = NULL;

  server = NULL;

  username = NULL;

  char curopt;

  while(((char)-1) != (curopt = getopt(argc, argv, "u:th")))

     {

       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: distrenslave [option] \nStarts a distren slave\n\t-u\tset username (run after fresh install)\n\t-t\tEnter test mode\n\t-h\tshow this help\n");

           return 2;

         }

       else if(curopt == 't')

         {

           slaveTest();

           return 0;

         }

       else if(curopt == 'u')

         username = strdup(optarg);

         fprintf(stderr, "Putting username \"%s\" in distrenslave.conf\n", username);

         conf_replace("distrenslave.conf", "!username", username);

         fprintf(stderr, "Please invoke distrenslave with no arguments to run with the username you just set\n");

         return 0;

     }

  /* Get conf data */

  options_init(argc, argv, &my_cfg, myopts, "slave", &commonopts);

  /* Notifies the user if there no username in .conf */

  if(checkUsername(username))

    return 1;

  /*

  fprintf(stderr, "Connecting to server...\n");

  if(remoteio_open(&comm_slave, commonopts->remoteio, server))

    {

      fprintf(stderr, "Error connecting to server; exiting\n");

      return 1;

    }

*/

  // Variables needed for main loop

  int jobnum = 0;

  int framenum = 0;

  int slavekey = atoi(username); // @TODO: Make this more friendly

  char *urltoTar;      /* Full URL to the server-side location of job#.tgz */

  char *pathtoTar;     /* Full path to the location of the job#.tgz */

  char *urltoOutput;   /* Full URL where output is posted */

  char *pathtoOutput;  /* Full path to the output (rendered) file */

  char *pathtoJobfile; /* Full path to the job's main file */

  char *outputExt = "jpg";     /* Output Extension (e.g., JPG) */

  int haveWork = 0;

  int quit = 0;

  // Main loop

  while(!quit)

    {

    // request work

    fprintf(stderr,"Requesting work...\n");

    haveWork = _web_getwork(slavekey, password, &jobnum, &framenum);

    /* If we got a frame */

    if(haveWork)

      {

        fprintf(stderr,"Got work from server...\n");

        /* @TODO: Add remotio hooks */

        // jobnum = remoteio_read(jobnum); /* Set jobnum from remoteio (we could use info from struct, but we need this info to download the xmlfile */

        // framenum = remoteio_read(jobnum); /* Set framenum from remoteio */

        // outputExt = remotio)read(outputExt); /* Set output extension from remotio */

        fprintf(stderr, "Preparing to render frame %d in job %d\n", framenum, jobnum);

        prepareJobPaths(jobnum, framenum, outputExt, datadir, &urltoTar, &pathtoTar, &pathtoJobfile, &urltoOutput, &pathtoOutput);

        free(outputExt);

        if(downloadTar(urltoTar, pathtoTar))

          return 1;

        unpackJob(pathtoTar, jobnum);

        /* Execute blender */

        if(exec_blender(pathtoJobfile, pathtoOutput, framenum))

          {

            fprintf(stderr,"Error running Blender. Check your installation and/or your PATH.\n");

            return 1;

          }

        free(pathtoJobfile);

        /* Post-execution */

        fprintf(stderr, "Finished frame %d in job %d, uploading...\n", framenum, jobnum);

        uploadOutput(pathtoOutput, urltoOutput, jobnum, framenum, slavekey); // @TODO: Handle return value

        free(urltoOutput);

        free(pathtoOutput);

        // Tell the server that rendering and upload are complete

	_web_finishframe(slavekey, password, jobnum, framenum);

      }

    else

      fprintf(stderr,"Nothing to do. Idling...\n");

    // @TODO: If the server says that every frame for the last jobnum is finished, OR if the data is getting old

    if(1 == 0)

      {

        // Note: individual frames are already deleted after uploading,

        // except for ones that couldn't be uploaded

        delete_jobdata(jobnum, datadir);

      }

    sleep(5); // Poll 5 seconds. @TODO: Remove all polling

  }

  fprintf(stderr,"Goodbye!\n");

  return 0;

}