/*

  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/>.

*/

/* This file contains the code which both processes (renders) jobs as a slave, and the code which distributes frames to slaves after receiving them from the client portion of the codebase. */

 /* Just some notes -- Ethan Zonca

 * ++ Make data availible for other apps to parse

 * Server<==>Client Communication

 * Upload while rendering

 */

#include "execio.h"

#include "options.h"

#include <confuse.h>

#include <stdio.h>

#include <malloc.h>

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

#include <time.h>

#define MAX_BLENDJOBS 100 // maximum number of stored jobs in memory, per job type (lux/blend). Eventually we can dump this data to disk, or atleast the remainder not in memory...

/* internally defined funcs */

void status_report_generator();

// Global Vars, try to cut down on these

int jobnum = 0; // The next job number to create in the queue

int hcfjob; // Highest consecutively finished job

int highest_jobnum; // The job number of the most recently created job, this is used when creating new jobs

/* ******************* Structs ************************ */

// Stores config info? editmycomment

struct distrend_config

{

  cfg_t *mycfg;

  struct options_common *options;

  struct distrend_listen **listens; /*< Null terminated array of structs */

};

/*

 frame[frame] Status Assignments:

  "NULL" - don't render me

  "0" - canceled

  "1" - unassigned

  "2" - assigned to slave

  "3" - completed by slave and uploaded

 Have a script crawl through each job in the arrays, priority-biased, and assign a frame to each slave.

 Then we will need some sort of watchdog to monitor slaves on the main server to check for stales. Maybe not worry about this for now.

*/

struct general_info {

	short int jobs_in_queue; //

	unsigned short int free_clients;

	unsigned short int rendering_clients;//

	unsigned short int total_finished_jobs; //

	unsigned int total_frames_rendered; //

} general_info;

// Stores Blender Job Info

struct blendjob {

  char *name;

  char *submitter;

  char *email;

  int priority;  // 1 is lowest, 10 is highest, 0 is done

  int percent_done;

  int completed_frames; // number of completed frames for stats/etc

  int assigned_frames; // number of assigned frames (that are not yet completed) for stats/etc

  int total_frames; // how many frames are in the animation for stats/etc

  int avg_render_time; // average seconds it took to render a frame

  unsigned int time_remaining; // estimated seconds remaining till render is complete (up to 49, 710 days)

							   // we can have the client computer convert it into days, hours, etc if they wish to view it

  struct frameset *frameset;

} blendjob[MAX_BLENDJOBS];

// Frameset Structure

struct frameset {

	int frame_num; // frame number to render

	char slave_name; // user that frame is assigned to

	int frame_status; // status of frame, 0= unassigned, 1= taken, 2= done

	clock_t start_time; // time the frame was started

	int time_to_render; // the total seconds it took to render the frame

} frameset[]; // Frameset array is generated by status_report_generator function

                         // Using this method to save memory, because if animation starts on a high frame number, it would waste a lot of RAM on empty structures

/* ********************** Functions ************************* */

// **** Finish-Setter: Sets a frame to the "completed" status.

void finish_frame(int jobnum, int frame){

  blendjob[jobnum].frameset[frame].frame_status = 2;

  blendjob[jobnum].frameset[frame].time_to_render = (clock() - blendjob[jobnum].frameset[frame].start_time);

  general_info.total_frames_rendered++;

}

// **** Queuer: Adds files to the queue

void queue(int type, char *name, char *submitter, char *email, int priority, int mode, int spp, struct frameset *frameset) {

	// Type: 1 = blender, add more types later

	// jobnum is the next available job number

	if(type == 1){

    blendjob[jobnum].name = name;