/*

 * Hedgewars, a free turn based strategy game

 * Copyright (C) 2012 Simeon Maxein <smaxein@googlemail.com>

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

 */

#include "netprotocol.h"

#include "../util/util.h"

#include "../util/logging.h"

#include "../base64/base64.h"

#include <zlib.h>

#include <string.h>

#include <stdio.h>

#include <errno.h>

#include <stdlib.h>

static int fillTeamFromMsg(flib_team *team, char **parts) {

	team->name = flib_strdupnull(parts[0]);

	team->grave = flib_strdupnull(parts[1]);

	team->fort = flib_strdupnull(parts[2]);

	team->voicepack = flib_strdupnull(parts[3]);

	team->flag = flib_strdupnull(parts[4]);

	team->ownerName = flib_strdupnull(parts[5]);

	if(!team->name || !team->grave || !team->fort || !team->voicepack || !team->flag || !team->ownerName) {

		return -1;

	}

	errno = 0;

	long difficulty = strtol(parts[6], NULL, 10);

	if(errno) {

		return -1;

	}

	for(int i=0; i<HEDGEHOGS_PER_TEAM; i++) {

		flib_hog *hog = &team->hogs[i];

		hog->difficulty = difficulty;

		hog->name = flib_strdupnull(parts[7+2*i]);

		hog->hat = flib_strdupnull(parts[8+2*i]);

		if(!hog->name || !hog->hat) {

			return -1;

		}

	}

	return 0;

}

flib_team *flib_team_from_netmsg(char **parts) {

	flib_team *result = NULL;

	flib_team *tmpTeam = flib_calloc(1, sizeof(flib_team));

	if(tmpTeam) {

		if(!fillTeamFromMsg(tmpTeam, parts)) {

			result = tmpTeam;

			tmpTeam = NULL;

		} else {

			flib_log_e("Error parsing team from net.");

		}

	}

	flib_team_destroy(tmpTeam);

	return result;

}

flib_scheme *flib_netmsg_to_cfg(flib_metascheme *meta, char **parts) {

	flib_scheme *result = flib_scheme_create(meta, parts[0]);

	if(result) {

		for(int i=0; i<meta->modCount; i++) {

			result->mods[i] = !strcmp(parts[i+1], "true");

		}

		for(int i=0; i<meta->settingCount; i++) {

			result->settings[i] = atoi(parts[i+meta->modCount+1]);

		}

	}

	return result;

}

flib_map *flib_netmsg_to_map(char **parts) {

	flib_map *result = flib_map_create_named(parts[3], parts[0]);

	if(result) {

		result->mapgen = atoi(parts[1]);

		result->mazeSize = atoi(parts[2]);

		result->templateFilter = atoi(parts[4]);

	}

	return result;

}

int flib_netmsg_to_drawnmapdata(char *netmsg, uint8_t** outbuf, size_t *outlen) {

	int result = -1;

	// First step: base64 decoding

	char *base64decout = NULL;

	size_t base64declen;

	bool ok = base64_decode_alloc(netmsg, strlen(netmsg), &base64decout, &base64declen);

	if(ok && base64declen>3) {

		// Second step: unzip with the QCompress header. That header is just a big-endian

		// uint32 indicating the length of the uncompressed data.

		uint8_t *ubyteBuf = (uint8_t*)base64decout;

		uint32_t unzipLen =

				(((uint32_t)ubyteBuf[0])<<24)

				+ (((uint32_t)ubyteBuf[1])<<16)

				+ (((uint32_t)ubyteBuf[2])<<8)

				+ ubyteBuf[3];

		if(unzipLen==0) {

			*outbuf = NULL;

			*outlen = 0;

			result = 0;

		} else {

			uint8_t *out = flib_malloc(unzipLen);

			if(out) {

				uLongf actualUnzipLen = unzipLen;

				int resultcode = uncompress(out, &actualUnzipLen, (Bytef*)(base64decout+4), base64declen-4);

				if(resultcode == Z_OK) {

					*outbuf = out;

					*outlen = actualUnzipLen;

					out = NULL;

					result = 0;

				} else {

					flib_log_e("Uncompressing drawn map failed. Code: %i", resultcode);

				}

			}

			free(out);

		}

	} else {

		flib_log_e("base64 decoding of drawn map failed.");

	}

	free(base64decout);

	return result;

}