/*
 * This file is part of OpenTTD.
 * OpenTTD 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, version 2.
 * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file subsidy_sl.cpp Code handling saving and loading of subsidies */

#include "../stdafx.h"

#include "saveload.h"
#include "compat/subsidy_sl_compat.h"

#include "../subsidy_base.h"

#include "../safeguards.h"

static const SaveLoad _subsidies_desc[] = {
	    SLE_VAR(Subsidy, cargo_type, SLE_UINT8),
	SLE_CONDVAR(Subsidy, remaining,  SLE_FILE_U8 | SLE_VAR_U16, SL_MIN_VERSION, SLV_CUSTOM_SUBSIDY_DURATION),
	SLE_CONDVAR(Subsidy, remaining,  SLE_UINT16,                SLV_CUSTOM_SUBSIDY_DURATION, SL_MAX_VERSION),
	SLE_CONDVAR(Subsidy, awarded,    SLE_UINT8,                                     SLV_125, SL_MAX_VERSION),
	SLE_CONDVAR(Subsidy, src_type,   SLE_UINT8,                                     SLV_125, SL_MAX_VERSION),
	SLE_CONDVAR(Subsidy, dst_type,   SLE_UINT8,                                     SLV_125, SL_MAX_VERSION),
	SLE_CONDVAR(Subsidy, src,        SLE_FILE_U8 | SLE_VAR_U16,                       SL_MIN_VERSION, SLV_5),
	SLE_CONDVAR(Subsidy, src,        SLE_UINT16,                                      SLV_5, SL_MAX_VERSION),
	SLE_CONDVAR(Subsidy, dst,        SLE_FILE_U8 | SLE_VAR_U16,                       SL_MIN_VERSION, SLV_5),
	SLE_CONDVAR(Subsidy, dst,        SLE_UINT16,                                      SLV_5, SL_MAX_VERSION),
};

struct SUBSChunkHandler : ChunkHandler {
	SUBSChunkHandler() : ChunkHandler('SUBS', CH_TABLE) {}

	void Save() const override
	{
		SlTableHeader(_subsidies_desc);

		for (Subsidy *s : Subsidy::Iterate()) {
			SlSetArrayIndex(s->index);
			SlObject(s, _subsidies_desc);
		}
	}

	void Load() const override
	{
		const std::vector<SaveLoad> slt = SlCompatTableHeader(_subsidies_desc, _subsidies_sl_compat);

		int index;
		while ((index = SlIterateArray()) != -1) {
			Subsidy *s = new (index) Subsidy();
			SlObject(s, slt);
		}
	}
};

static const SUBSChunkHandler SUBS;
static const ChunkHandlerRef subsidy_chunk_handlers[] = {
	SUBS,
};

extern const ChunkHandlerTable _subsidy_chunk_handlers(subsidy_chunk_handlers);