#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <time.h>
#include <sys/socket.h>
#include "irc.h"

#ifdef ENABLE_SSL
#include <openssl/err.h>
#endif

IRCC_client client;
char *dir = "./";
char *ext = ".txt";
char *fmt = "[%s] %s";
char *host = "127.0.0.1";
char *nick = "historybot";
int port = 6667;
int usessl = 0;

void die(const char *msg) {
	fprintf(stderr, "history: %s\n", msg);
	IRCC_close(&client);
	exit(1);
}

void sig_handler(int sig) {
	fprintf(stderr, "history: recived signal: %d\n", sig);

	IRCC_close(&client);
	exit(0);
}

char *GetFilename(void) {
	time_t t = time(NULL);
	struct tm tm = *localtime(&t);

	size_t filename_size = strlen(client.irc_channel) + (sizeof(tm.tm_year) * 3) + strlen(ext) + 3;
	char *filename = malloc(filename_size + 1);
	if (filename == NULL)
		die("malloc failed");

	snprintf(filename, filename_size, "%s_%d-%d-%d%s", client.irc_channel + 1, tm.tm_mday, tm.tm_mon, tm.tm_year, ext);
	return filename;
}

void WriteToFile(void) {
	if (client.irc_msg[1] == '.' || client.irc_channel[0] != '#')
		return;

	char *filename = GetFilename();
	FILE *fp = fopen(filename, "a");
	free(filename);

	if (fp == NULL) {
		fprintf(stderr, "history: cant open file: %s\n", client.irc_channel);
		return;
	}

	fprintf(fp, fmt, client.irc_nick, client.irc_msg);
	fprintf(fp, "\n");
	fclose(fp);
}

int main(int argc, char **argv) {
	signal(SIGTERM, sig_handler);
	signal(SIGKILL, sig_handler);

	int opt;
	while ((opt = getopt(argc, argv, "h:p:d:n:f:e:t")) != -1) {
		switch (opt) {
			case 'h':
				host = optarg;
				break;

			case 'p':
				port = atoi(optarg);
				break;

			case 'd':
				dir = optarg;
				break;

			case 'n':
				nick = optarg;
				break;

			case 'e':
				ext = optarg;
				break;

			case 'f':
				fmt = optarg;
				break;

			case 't':
				usessl = 1;
				break;

			default:
				printf("history [hpdneft] [\"#channel,key\"]\n\t-t Use ssl\n\t-h HOST  Default: %s\n\t-p PORT  Default: %d\n\t-d DIR Log dir  Default: %s\n\t-n NICK  Default: %s\n\t-e EXT File extantion  Default: %s\n\t-f FMT Text format  Default: %s\n", host, port, dir, nick, ext, fmt);
				return 0;
		}
	}

	argv += optind;
	argc -= optind;

	if (chdir(dir))
		die("Cant to change directory");

	int status = IRCC_connect(&client, host, port);
	if (status == IRCC_ERROR)
		die("connection refused");

	if (usessl) {
#ifdef ENABLE_SSL
		if (IRCC_initssl(&client) == IRCC_ERROR)
			die(ERR_error_string(ERR_get_error(), NULL));
#endif
	}

	//Register and skip motd
	if (IRCC_register(&client, nick) == IRCC_DISCONNECTED)
		die("disconnected");

	sleep(5);

	//Join in channel
	for (int i = 0; i < argc; i++) {
		char *key = "";
		char *channel = argv[i];

		char *p = strchr(channel, ',');
		if (p != NULL) {
			p[0] = '\0';
			key = p + 1;
		}

		IRCC_join(&client, channel, key);
	}

	//Recv
	while (1) {
		int irc_status = IRCC_recv(&client);
		if (irc_status == IRCC_DISCONNECTED)
			die("disconnected");

		irc_status = IRCC_parse(&client);
		if (client.irc_nick != NULL && client.irc_channel != NULL && client.irc_msg != NULL && irc_status == IRCC_PRIVMSG)
			WriteToFile();
	}
}