/*
  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/>.

 */

// Provides DISTREN_REQUEST* which is in reality, DISTREN_SEND(signal) in the minds of your average joe
#include "protocol.h"
#include "options.h" // Confuse, etc.
#include "slavefuncs.h" // Slave functions
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include "asprintf.h"

int slavestatus = 0; // Ugh global vars

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

int counter;

/* Parses arguments, skips if there are no args */
for(counter=0; counter<argc; counter++){
	if(strcmp(argv[counter], "-h") == 0) {
		fprintf(stderr, "Usage: distrenslave [option] <username> <emailaddr>\nStarts a distren slave\n\t-h\tshow this help\n\t-c\tregisters a user with [username] and [emailaddr] \n");
		return 2;
	}
}
	if(argc>1
		&& (strcmp("-c", argv[1]) == 0))
	{
		char *username;
		char *email;

		if(argc != 4)
		{
			fprintf(stderr, "I need more arguments!\n%d is not enough!\n Invoke 'distrenslave -c <username> <emailaddr> to register. \n Already registered? Edit your distrenslave.conf file!\n'", argc - 1);
			return 234;
		}

		username = argv[2];
		email = argv[3];

		if(!strchr(email, '@'))
		{
			fprintf(stderr, "I want to see an '@' in your email address!\n%s may be good enough for you, but I need more!\n", email);
			return 235;
		}
		if( register_user(username, email) == 1){
			// register_user generates a key, too */
			fprintf(stderr,"Registration successfull. You may now invoke distrenslave with no arguments.\n");
			return 0;
		}
		else{
			fprintf(stderr,"Please try again! :D\n");
			return 0;
		}
	}
/* End arg parser */


/* Option getter: Creates vars to grab stuff from conf, uses the options include to grab this data */
char *username;
username = NULL;
cfg_t * my_cfg;
cfg_opt_t myopts[] = {
		CFG_SIMPLE_STR("username", &username),
		CFG_END()
		};
struct options_common *commonopts;
options_init(argc,argv,&my_cfg, myopts, "slave", &commonopts);
/* End option getter */


/* Notifies the user if there is no username in the conf file */
	if(username == NULL || strcmp(username, "!username") == 0 ){
	  fprintf(stderr, "\nYou didn't register!\nPlease register or edit your config. (see -h)\nIf this error persists, check distrenslave.conf to ensure all items are filled.\n");
	}
	else if( username != NULL || strcmp(username,"!username") != 0 ){
		// Logs ya in:
		if(login_user(username) == 1){
			fprintf(stderr,"You should now be logged into distren.\n");
		}
		else{
			fprintf(stderr,"Login failed. I have no clue why. Sorry.\n");
			return 0;
		}
	}
	else{
	  fprintf(stderr,"Something is terribly wrong!");
	}


/* Somewhat pseudo Rendering code */

/* These should all be filled by remotio and other code */
int jobnum;
int framenum;
int slaveget;
int telldone;
int blender_is_running;
char *jobdatapath = "/path/to/job.tgz";
char *outputpath = "/path/to/output.jpg";

char *pathtoblend; // oh, blender-specific horribleness

// If the slave is getting a frame (fill jobnum, framenum, and slaveget vars when this happens)
	if(slaveget ==1){
		fprintf(stderr, "Received %d in job %d, preparing to render...",framenum,jobnum);
		char *jobdataurl;


		_distren_asprintf(&jobdataurl, "http://protofusion.org/distren/stor/job%d.tgz",jobnum);

		curlget(jobdataurl, jobdatapath); // downloads job data from the url to the path stated
		_distren_asprintf(&pathtoblend, "%s/job.blend", jobdatapath ); // @TODO: Fix jobdatapath so it knows where to get the file for real :D
		exec('tar -xvf job%d.tgz /tmp/distren/job%d',jobnum,jobnum); // @TODO: How will we do this?
		exec_blender(blendjob, pathtoblend, outputpath, framenum); // So this should grab data from the struct? I have no idea. @TODO: Ohnobinki, we should clear this up.

		// Consider placing the following in the exec_blender() function
			while(blender_is_running == 1){
				tell_the_server(DISTREN_REQUEST_PROGRESS);
				fprintf(stderr, "Rendering frame %d in job %d...",framenum,jobnum);
				sleep(5); // or not... this should be more event-driven, but should still give a heartbeat to the server
			}


		telldone=1; // When done rendering, set this.
	}
	if(telldone==1){
		fprintf(stderr, "Finished frame %d in job %d, uploading...",framenum,jobnum);
		char *outputurl;
		_distren_asprintf(&outputurl, "http://protofusion.org/distren/stor/job%d/",jobnum); // Throws the jobnum nicely in the string
		curlpost(outputpath, outputurl); // posts the output at outputpath to the server at outputurl
		tell_the_server(DISTREN_REQUEST_DONEFRAME); // AKA "I'm done rendering that frame you sent me"
		telldone=0;
		// Slave now becomes idle, doesn't need to tell the server anything, ssh handles this.
	}


  return 0;
}