/* 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

/*
 * This code is based on original Hugo Trilogy source code
 *
 * Copyright (c) 1989-1995 David P. Gray
 *
 */

#include "common/system.h"
#include "common/util.h"
#include "gui/message.h"

#include "hugo/hugo.h"
#include "hugo/dialogs.h"
#include "hugo/util.h"

namespace Hugo {

namespace Utils {

/**
 * Returns index (0 to 7) of first 1 in supplied byte, or 8 if not found
 */
int firstBit(byte data) {
	if (!data)
		return 8;

	int i;
	for (i = 0; i < 8; i++) {
		if ((data << i) & 0x80)
			break;
	}

	return i;
}

/**
 * Returns index (0 to 7) of last 1 in supplied byte, or 8 if not found
 */
int lastBit(byte data) {
	if (!data)
		return 8;

	int i;
	for (i = 7; i >= 0; i--) {
		if ((data << i) & 0x80)
			break;
	}

	return i;
}

/**
 * Reverse the bit order in supplied byte
 */
void reverseByte(byte *data) {
	byte maskIn = 0x80;
	byte maskOut = 0x01;
	byte result = 0;

	for (byte i = 0; i < 8; i++, maskIn >>= 1, maskOut <<= 1) {
		if (*data & maskIn)
			result |= maskOut;
	}

	*data = result;
}

void notifyBox(const Common::String &msg, TtsOptions ttsOptions) {
#ifdef USE_TTS
	if (ttsOptions & kTtsSpeech) {
		bool replaceNewlines = ((ttsOptions & kTtsReplaceNewlines) == kTtsReplaceNewlines);
		sayText(msg, Common::TextToSpeechManager::QUEUE, replaceNewlines);
	}
#endif

	notifyBox(Common::U32String(msg));
}

void notifyBox(const Common::U32String &msg) {
	if (msg.empty())
		return;

	GUI::MessageDialog dialog(msg);
	dialog.runModal();

#ifdef USE_TTS
	stopTextToSpeech();
#endif
}

Common::String promptBox(const Common::String &msg) {
	if (msg.empty())
		return Common::String();

#ifdef USE_TTS
	sayText(msg, Common::TextToSpeechManager::QUEUE);
#endif

	EntryDialog dialog(msg, "OK", "");

	dialog.runModal();

	Common::U32String input = dialog.getEditString();

#ifdef USE_TTS
	sayText(input);
#endif

	return input;
}

bool yesNoBox(const Common::String &msg) {
#ifdef USE_TTS
	sayText(msg, Common::TextToSpeechManager::QUEUE);
#endif

	return yesNoBox(Common::U32String(msg));
}

bool yesNoBox(const Common::U32String &msg) {
	if (msg.empty())
		return 0;

	GUI::MessageDialog dialog(msg, Common::U32String("YES"), Common::U32String("NO"));

	int result = dialog.runModal();

#ifdef USE_TTS
	stopTextToSpeech();
#endif

	return (result == GUI::kMessageOK);
}

char *hugo_strlwr(char *buffer) {
	char *result = buffer;

	while (*buffer != '\0') {
		if (Common::isUpper(*buffer))
			*buffer = tolower(*buffer);
		buffer++;
	}

	return result;
}

#ifdef USE_TTS

void sayText(const Common::String &text, Common::TextToSpeechManager::Action action, bool replaceNewlines) {
	Common::String ttsMessage(text);

	if (replaceNewlines) {
		ttsMessage.replace('\n', ' ');
		ttsMessage.replace('\r', ' ');
	}

	// Some text is enclosed in < and >, which won't be voiced unless they're replaced
	Common::replace(ttsMessage, "<", ", ");
	Common::replace(ttsMessage, ">", ", ");

	sayText(Common::U32String(ttsMessage, Common::CodePage::kWindows1252), action);
}

void sayText(const Common::U32String &text, Common::TextToSpeechManager::Action action) {
	Common::TextToSpeechManager *ttsMan = g_system->getTextToSpeechManager();
	if (ttsMan && ConfMan.getBool("tts_enabled")) {
		ttsMan->say(text, action);
	}
}

void stopTextToSpeech() {
	Common::TextToSpeechManager *ttsMan = g_system->getTextToSpeechManager();
	if (ttsMan && ConfMan.getBool("tts_enabled") && ttsMan->isSpeaking()) {
		ttsMan->stop();
	}
}

#endif

} // End of namespace Utils

} // End of namespace Hugo