/*

 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.

*/

// 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

                         // 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);

}

// **** 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;

    blendjob[jobnum].submitter = submitter;

    blendjob[jobnum].email = email;

    blendjob[jobnum].priority = priority;

jobnum++; // Advance the jobnumber for the next queued job

}

// **** Status Report Generator: figures out how much of the job is done, where jobnum corresponds to the job number

// This uses pointers, so when it is run it updates certain values in memory

void status_report_generator(){

	while(blendjob[(hcfjob+1)].priority == 0)  //If the job after the highest consecutively finished job is finished

		hcfjob++;  // adds 1 to the highest consecutively finished job and checks the next one, till the job after the hcfjob is not done

	int num1 = hcfjob+1; // to scan through jobs

	while(num1 <= highest_jobnum){

			if(blendjob[num1].priority != 0){ // If the job is not done, scan it

				int num2 = 0;  // to scan through frames

				float finished_frames = 0; // variable that counts the completed frames

				int pending_frames = 0; // variable that counts the assigned frames

				float percent = 0;  // variable that stores the percent done of the blendjob

				unsigned int total_time = 0;  // total time taken to render all the completed frames for a job

				while(num2 <= blendjob[num1].total_frames){ // scans through frames, based on their status it runs a statement(s)

					if(blendjob[num1].frameset[num2].frame_status == 2){ // If the frame is done

						finished_frames++;

						total_time = total_time + blendjob[num1].frameset[num2].time_to_render;

					}

						pending_frames++;

					num2++;

				}

				// find the percent of completed frames

				percent = (finished_frames / blendjob[num1].total_frames) * 100;

				// updates values in the blendjob struct for jobnum held by the variable num1

				blendjob[num1].completed_frames = finished_frames;

				blendjob[num1].assigned_frames = pending_frames;

				blendjob[num1].percent_done = percent;

				blendjob[num1].avg_render_time = (total_time / finished_frames);

				blendjob[num1].time_remaining = (blendjob[num1].avg_render_time * (blendjob[num1].total_frames - finished_frames));

			}

			num1++;

		}

	}

// **** Structure Builder: This function creates frame array based on the total number of frames to be rendered, which will then be parsed by function frame_farmer.

void frame_num_struct_builder(int sframe, int eframe) {

	int jobnum_new = highest_jobnum + 1;

	int total = (sframe - eframe) +1;  // total number of frames

	int fcount = sframe; // Used to create all the frames in the structure from sframe to eframe

	int x = 0;

	blendjob[jobnum_new].total_frames = total; // sets the total number of frames in animation for status purposes

		blendjob[jobnum_new].frameset[x].frame_num = fcount;

		x++;

		fcount++;

	}

}

// Frame Assigner: matches your computer up with a lovely frame to render

int frame_finder(){

	int your_frame = 0;  // your_frame is an interger value that will be given to the client as the frame number to render

	int finder_jobnum = 0;

	int frameset_count = 0; // the frameset number, note* frames in an animation don't start at zero

	short int done = 0;

	short int priority = 10;