#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <unistd.h>
#include "confparser.h"
#include "log_trace.h"
#include "rmps.h"

static void usage(char *argv)
{
	log_trace( ERROR,
		 "Usage:\n%s start|stop|restart [--daemonize=yes|no]\n",
		 argv );
}

int main(int argc, char *argv[])
{
	int fork_flag = 1, task;

	if (argc < 2 || argc > 3) {
		usage(argv[0]);
		exit(EXIT_FAILURE);
	}

	if (!strcmp(argv[1], "start"))
		task = 1;
	else if (!strcmp(argv[1], "stop"))
		task = 2;
	else if (!strcmp(argv[1], "restart"))
		task = 3;
	else {
		usage(argv[0]);
		exit(EXIT_FAILURE);
	}

	if (argc == 3) {
		if (!strcmp("--daemonize=yes", argv[2]));
		else if (!strcmp("--daemonize=no", argv[2]))
			fork_flag = 0;
		else {
			usage(argv[0]);
			exit(EXIT_FAILURE);
		}
	}
	if (confparse() != 0) {
			log_trace(ERROR, "Failed to parse the conf!");
			exit(EXIT_FAILURE);
	}
	log_trace(VERBOSE, "Conf parser finished successfully");
	//confexport();
	
	if (task == 2 || task == 3) {
		char buf[10];
		int pid;
		FILE *fp;
		if (task == 2)
			log_trace(VERBOSE, "We got a stop signal!");
		else if (task == 3)
			log_trace(VERBOSE, "We got a restart signal!");

		fp = fopen(conf.rmps.pidfile, "r");

		switch (errno) {
		case EEXIST:
			if (!fgets(buf, 10, fp)) {
				log_trace(ERROR, "Failed to read %s!", conf.rmps.pidfile);
				exit(EXIT_FAILURE);
			}
			pid = strtol(buf, NULL, 10);
			kill(pid, SIGTERM);
			//waitpid(TODO);
			break;
		case EACCES:
			log_trace(ERROR, "Permission denied to read PID. Exiting!");
			exit(EXIT_FAILURE);
		case ENOENT:
			if (task == 2)
				exit(EXIT_FAILURE);
			break;
		default:
			log_trace( ERROR,
				   "Unhandled errno while opening PID: %d. Exiting!",
				   errno
			);
			exit(EXIT_FAILURE);
		}
	}
	if (task == 1 || task == 3) {
		launch_rmps(&conf, fork_flag);
	}
	
	return 0;
}