#include "mapreduce.h"

int main(int argc, char *argv[]) {
	
	if(argc < 4) {
		printf("Less number of arguments.\n");
		printf("./mapreduce #mappers #reducers inputFile\n");
		exit(0);
	}

	// ###### DO NOT REMOVE ######
	int nMappers 	= strtol(argv[1], NULL, 10);
	int nReducers 	= strtol(argv[2], NULL, 10);
	char *inputFile = argv[3];

	// ###### DO NOT REMOVE ######
	bookeepingCode();

	// ###### DO NOT REMOVE ######
	pid_t pid = fork();
	if(pid == 0){
		//send chunks of data to the mappers in RR fashion
		sendChunkData(inputFile, nMappers);
		exit(0);
	}
	sleep(1);


	pid_t mapperPid;
	for (int i = 0; i < nMappers; i++) {
		mapperPid = fork();
		if (mapperPid > 0) {
			//TODO: exec here
			char num[10];
			sprintf(num, "%d", i);
			execl("./mapper", "./mapper", &num, NULL);
		}
	}
	
    for (int i = 0; i < nMappers; i++) {
		//Hopefully this works
		wait(NULL);
	}


	// ###### DO NOT REMOVE ######
    // shuffle sends the word.txt files generated by mapper 
    // to reducer based on a hash function
	pid = fork();
	if(pid == 0){
		shuffle(nMappers, nReducers);
		exit(0);
	}
	sleep(1);



	pid_t reducerPid;
	for (int i = 0; i < nReducers; i++) {
		if (pid == 0)
		reducerPid = fork();
		if (reducerPid > 0) {
			//TODO: exec here
			char num[10];
			sprintf(num, "%d", i);
			execl("./reducer", "./reducer", &num, NULL);
		}
	}

	for (int i = 0; i < nReducers; i++) {
		//Maybe this works too?
		wait(NULL);
	}

	return 0;
}