/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 "bladerunner/text_resource.h"

#include "bladerunner/bladerunner.h"

#include "common/debug.h"
#include "common/util.h"

namespace BladeRunner {

TextResource::TextResource(BladeRunnerEngine *vm) {
	_vm      = vm;
	_count   = 0;
	_ids     = nullptr;
	_offsets = nullptr;
	_strings = nullptr;
}

TextResource::~TextResource() {
	delete[] _ids;
	delete[] _offsets;
	delete[] _strings;
}

bool TextResource::open(const Common::String &name, bool localized) {
	assert(name.size() <= 8);

	Common::String resName;
	if (localized) {
		resName = Common::String::format("%s.TR%s", name.c_str(), _vm->_languageCode.c_str());
	} else {
		resName = Common::String::format("%s.TRE", name.c_str());
	}
	Common::ScopedPtr<Common::SeekableReadStream> s(_vm->getResourceStream(resName));
	if (!s) {
		warning("TextResource::open(): Can not open %s", resName.c_str());
		return false;
	}

	_count = s->readUint32LE();

	_ids = new uint32[_count];
	_offsets = new uint32[_count + 1];

	for (uint32 i = 0; i != _count; ++i) {
		_ids[i] = s->readUint32LE();
	}

	for (uint32 i = 0; i != _count + 1; ++i) {
		_offsets[i] = s->readUint32LE();
	}

	uint32 stringsStart = s->pos() - 4;

	for (uint32 i = 0; i != _count + 1; ++i) {
		_offsets[i] -= stringsStart;
	}

	uint32 remain = s->size() - s->pos();
	_strings = new char[remain];

	assert(remain >= _offsets[_count]);

	s->read(_strings, remain);

#if BLADERUNNER_DEBUG_CONSOLE
	debug("\n%s\n----------------", resName.c_str());
	for (uint32 i = 0; i != (uint32)_count; ++i) {
		debug("%3d: %s", _ids[i], getText(_ids[i]));
	}
#endif

	return true;
}

const char *TextResource::getText(uint32 id) const {
	for (uint32 i = 0; i != _count; ++i) {
		if (_ids[i] == id) {
			return _strings + _offsets[i];
		}
	}

	return "";
}

const char *TextResource::getOuttakeTextByFrame(uint32 frame) const {
	for (uint32 i = 0; i != _count; ++i) {
		//debug("Checking %d - so within: %d , %d", _ids[i], (0x0000FFFF & _ids[i]), ((_ids[i] >> 16) & 0x0000FFFF ) );
		if ((frame >= (0x0000FFFF & _ids[i]) )   && (frame <  ((_ids[i] >> 16) & 0x0000FFFF ) )) {
			// we found an id with lower 16bits smaller or equal to our frame key
			// and with higher 16 bits higher than the frame key
			return _strings + _offsets[i];
		}
	}
	return "";
}

int TextResource::getCount() const {
	return _count;
}

} // End of namespace BladeRunner