/* 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/>.
 *
 */

/*
 * Copyright (C) 2006-2010 - Frictional Games
 *
 * This file is part of HPL1 Engine.
 */

#include "hpl1/engine/system/String.h"

#include "hpl1/engine/system/low_level_system.h"

namespace hpl {

//////////////////////////////////////////////////////////////////////////
// PUBLIC METHODS
//////////////////////////////////////////////////////////////////////////

//-----------------------------------------------------------------------

tWString cString::To16Char(const tString &asString) {
	return asString;
}

//-----------------------------------------------------------------------

tString cString::To8Char(const tWString &awsString) {
	return awsString;
}

//-----------------------------------------------------------------------

tWString cString::Get16BitFromArray(const tString &asArray) {
	// TODOD: needs to be rewritten to be more portal as wchar_t is not ALWAYS 2 bytes. (it's 4 on linux and os x)
	tIntVec vVals;
	GetIntVec(asArray, vVals, NULL);

	tWString wsString;
	for (auto v : vVals) {
		wsString += static_cast<Common::U32String::value_type>(v);
	}
	return wsString;
}

//-----------------------------------------------------------------------

tString cString::Sub(const tString &asString, int alStart, int alCount) {
	int lStringSize = (int)asString.size();
	if (alStart >= lStringSize)
		return "";
	if (alStart + alCount > lStringSize)
		alCount = lStringSize - alStart;

	if (alCount < 0)
		return asString.substr(alStart);
	else
		return asString.substr(alStart, alCount);
}
tWString cString::SubW(const tWString &asString, int alStart, int alCount) {
	int lStringSize = (int)asString.size();
	if (lStringSize == 0)
		return Common::U32String("");
	if (alStart >= lStringSize)
		return Common::U32String("");
	if (alStart + alCount > lStringSize)
		alCount = lStringSize - alStart;

	if (alCount < 0)
		return asString.substr(alStart);
	else
		return asString.substr(alStart, alCount);
}

//-----------------------------------------------------------------------

// Get the file extension of a string
tString cString::GetFileExt(tString aString) {
	int pos = GetLastStringPos(aString, ".");

	if (pos < 0)
		return "";
	else
		return aString.substr(pos + 1);
}

tWString cString::GetFileExtW(tWString aString) {
	int pos = GetLastStringPosW(aString, Common::U32String("."));

	if (pos < 0)
		return Common::U32String("");
	else
		return aString.substr(pos + 1);
}

//-----------------------------------------------------------------------

tString cString::ToLowerCase(tString aString) {
	aString.toLowercase();
	return aString;
}

tWString cString::ToLowerCaseW(tWString aString) {
	aString.toLowercase();
	return aString;
}

//-----------------------------------------------------------------------

// Set the file extension
tString cString::SetFileExt(tString aString, tString aExt) {
	if (aExt.substr(0, 1) == ".")
		aExt = aExt.substr(1);
	if (GetFileExt(aString) != "") {
		aString = aString.substr(0, GetLastStringPos(aString, "."));
	}

	if (aExt != "")
		aString = aString + "." + aExt;

	return aString;
}

tWString cString::SetFileExtW(tWString aString, tWString aExt) {
	if (aExt.substr(0, 1) == Common::U32String("."))
		aExt = aExt.substr(1);
	if (GetFileExtW(aString) != Common::U32String("")) {
		aString = aString.substr(0, GetLastStringPosW(aString, Common::U32String(".")));
	}

	if (aExt != Common::U32String(""))
		aString = aString + _W(".") + aExt;

	return aString;
}

//-----------------------------------------------------------------------

tString cString::SetFilePath(tString aString, tString aPath) {
	if (GetLastChar(aPath) != "/" && GetLastChar(aPath) != "\\")
		aPath += "/";

	aString = GetFileName(aString);

	return aPath + aString;
}

tWString cString::SetFilePathW(tWString aString, tWString aPath) {
	if (GetLastCharW(aPath) != _W("/") && GetLastCharW(aPath) != _W("\\"))
		aPath += _W("/");

	aString = GetFileNameW(aString);

	return aPath + aString;
}

//-----------------------------------------------------------------------

// Gets the filename in a path
tString cString::GetFileName(tString aString) {
	int pos1 = GetLastStringPos(aString, "\\");
	int pos2 = GetLastStringPos(aString, "/");
	int pos = pos1 > pos2 ? pos1 : pos2;

	if (pos < 0)
		return aString;
	else
		return aString.substr(pos + 1);
}
tWString cString::GetFileNameW(tWString aString) {
	int pos1 = GetLastStringPosW(aString, _W("\\"));
	int pos2 = GetLastStringPosW(aString, _W("/"));
	int pos = pos1 > pos2 ? pos1 : pos2;

	if (pos < 0)
		return aString;
	else
		return aString.substr(pos + 1);
}

//-----------------------------------------------------------------------

tString cString::GetFilePath(tString aString) {
	if (GetLastStringPos(aString, ".") < 0)
		return aString;

	int pos1 = GetLastStringPos(aString, "\\");
	int pos2 = GetLastStringPos(aString, "/");
	int pos = pos1 > pos2 ? pos1 : pos2;

	if (pos < 0)
		return "";
	else
		return aString.substr(0, pos + 1);
}

tWString cString::GetFilePathW(tWString aString) {
	if (GetLastStringPosW(aString, _W(".")) < 0)
		return aString;

	int pos1 = GetLastStringPosW(aString, _W("\\"));
	int pos2 = GetLastStringPosW(aString, _W("/"));
	int pos = pos1 > pos2 ? pos1 : pos2;

	if (pos < 0)
		return _W("");
	else
		return aString.substr(0, pos + 1);
}

//-----------------------------------------------------------------------

tString cString::ReplaceCharTo(tString aString, tString asOldChar, tString asNewChar) {
	if (asNewChar != "") {
		for (int i = 0; i < (int)aString.size(); i++) {
			if (aString[i] == asOldChar[0])
				aString.setChar(asNewChar[0],i);
		}
		return aString;
	} else {
		tString sNewString;

		for (int i = 0; i < (int)aString.size(); i++) {
			if (aString[i] != asOldChar[0])
				sNewString += aString[i];
		}
		return sNewString;
	}
}

tWString cString::ReplaceCharToW(tWString aString, tWString asOldChar, tWString asNewChar) {
	if (asNewChar != _W("")) {
		for (int i = 0; i < (int)aString.size(); i++) {
			if (aString[i] == asOldChar[0])
				aString.setChar(asNewChar[0], i);
		}
		return aString;
	} else {
		tWString sNewString;

		for (int i = 0; i < (int)aString.size(); i++) {
			if (aString[i] != asOldChar[0])
				sNewString += aString[i];
		}
		return sNewString;
	}
}

//-----------------------------------------------------------------------

tString cString::ReplaceStringTo(tString asString, tString asOldString, tString asNewString) {
	tString sNewString = "";

	for (size_t i = 0; i < asString.size(); i++) {
		bool bFound = true;
		// Search for old string
		if (asString.size() >= i + asOldString.size()) {
			for (size_t j = 0; j < asOldString.size(); ++j) {
				if (asString[i + j] != asOldString[j]) {
					bFound = false;
					break;
				}
			}
		} else {
			bFound = false;
		}

		// Insert new string
		if (bFound) {
			sNewString += asNewString;
			i += asOldString.size() - 1;
		}
		// Just add the character
		else {
			sNewString += asString[i];
		}
	}
	return sNewString;
}

//-----------------------------------------------------------------------

// gets the last char in the string
tString cString::GetLastChar(tString aString) {
	if (aString.size() == 0)
		return "";
	return aString.substr(aString.size() - 1);
}

tWString cString::GetLastCharW(tWString aString) {
	if (aString.size() == 0)
		return _W("");
	return aString.substr(aString.size() - 1);
}

//-----------------------------------------------------------------------
tString cString::ToString(const char *asString, tString asDefault) {
	if (asString == NULL)
		return asDefault;

	return asString;
}

//-----------------------------------------------------------------------

int cString::ToInt(const char *asString, int alDefault) {
	if (asString == NULL)
		return alDefault;

	return atoi(asString);
}

//-----------------------------------------------------------------------

float cString::ToFloat(const char *asString, float afDefault) {
	if (asString == NULL)
		return afDefault;

	return (float)atof(asString);
}

//-----------------------------------------------------------------------

bool cString::ToBool(const char *asString, bool abDefault) {
	if (asString == NULL)
		return abDefault;

	tString asTempString = ToLowerCase(asString);
	return asTempString == "true" ? true : false;
}

//-----------------------------------------------------------------------

cColor cString::ToColor(const char *asString, const cColor &aDefault) {
	if (asString == NULL)
		return aDefault;

	tFloatVec vValues;

	GetFloatVec(asString, vValues, NULL);

	if (vValues.size() != 4)
		return aDefault;

	return cColor(vValues[0], vValues[1], vValues[2], vValues[3]);
}

//-----------------------------------------------------------------------

cVector2f cString::ToVector2f(const char *asString, const cVector2f &avDefault) {
	if (asString == NULL)
		return avDefault;

	tFloatVec vValues;

	GetFloatVec(asString, vValues, NULL);

	if (vValues.size() != 2)
		return avDefault;

	return cVector2f(vValues[0], vValues[1]);
}

//-----------------------------------------------------------------------

cVector3f cString::ToVector3f(const char *asString, const cVector3f &avDefault) {
	if (asString == NULL)
		return avDefault;

	tFloatVec vValues;

	GetFloatVec(asString, vValues, NULL);

	if (vValues.size() != 3)
		return avDefault;

	return cVector3f(vValues[0], vValues[1], vValues[2]);
}

//-----------------------------------------------------------------------

cVector2l cString::ToVector2l(const char *asString, const cVector2l &avDefault) {
	if (asString == NULL)
		return avDefault;

	tIntVec vValues;

	GetIntVec(asString, vValues, NULL);

	if (vValues.size() != 2)
		return avDefault;

	return cVector2l(vValues[0], vValues[1]);
}

//-----------------------------------------------------------------------

cVector3l cString::ToVector3l(const char *asString, const cVector3l &avDefault) {
	if (asString == NULL)
		return avDefault;

	tIntVec vValues;

	GetIntVec(asString, vValues, NULL);

	if (vValues.size() != 3)
		return avDefault;

	return cVector3l(vValues[0], vValues[1], vValues[2]);
}

//-----------------------------------------------------------------------

cMatrixf cString::ToMatrixf(const char *asString, const cMatrixf &a_mtxDefault) {
	if (asString == NULL)
		return a_mtxDefault;

	tFloatVec vValues;

	GetFloatVec(asString, vValues, NULL);

	if (vValues.size() != 16)
		return a_mtxDefault;

	return cMatrixf(vValues[0], vValues[1], vValues[2], vValues[3],
					vValues[4], vValues[5], vValues[6], vValues[7],
					vValues[8], vValues[9], vValues[10], vValues[11],
					vValues[12], vValues[13], vValues[14], vValues[15]);
}

//-----------------------------------------------------------------------

tIntVec &cString::GetIntVec(const tString &asData, tIntVec &avVec, tString *apSeparators) {
	tStringVec mvStr;
	GetStringVec(asData, mvStr, apSeparators);

	for (int i = 0; i < (int)mvStr.size(); i++) {
		avVec.push_back(ToInt(mvStr[i].c_str(), 0));
	}

	return avVec;
}

//-----------------------------------------------------------------------

tUIntVec &cString::GetUIntVec(const tString &asData, tUIntVec &avVec, tString *apSeparators) {
	tStringVec mvStr;
	GetStringVec(asData, mvStr, apSeparators);

	for (int i = 0; i < (int)mvStr.size(); i++) {
		avVec.push_back(ToInt(mvStr[i].c_str(), 0));
	}

	return avVec;
}

//-----------------------------------------------------------------------

tFloatVec &cString::GetFloatVec(const tString &asData, tFloatVec &avVec, tString *apSeparators) {
	tStringVec mvStr;
	GetStringVec(asData, mvStr, apSeparators);

	for (int i = 0; i < (int)mvStr.size(); i++) {
		avVec.push_back(ToFloat(mvStr[i].c_str(), 0));
	}

	return avVec;
}

//-----------------------------------------------------------------------

tString cString::ToString(int alX) {
	char buff[256];

	snprintf(buff, 256, "%d", alX);

	return buff;
}

tString cString::ToString(float afX) {
	char buff[256];

	snprintf(buff, 256, "%f", afX);

	return buff;
}

//-----------------------------------------------------------------------

tWString cString::ToStringW(int alX) {
	return Common::U32String::format("%d", alX);
}

tWString cString::ToStringW(float afX) {
	return Common::U32String::format("%f", afX);
}

//-----------------------------------------------------------------------

tStringVec &cString::GetStringVec(const tString &asData, tStringVec &avVec, tString *apSeparators) {
	tString str = "";
	bool start = false;
	tString c = "";

	for (int i = 0; i < (int)asData.size(); i++) {
		c = asData.substr(i, 1);
		bool bNewWord = false;

		// Check if the current char is a separator
		if (apSeparators) {
			for (size_t j = 0; j < apSeparators->size(); j++) {
				if ((*apSeparators)[j] == c[0]) {
					bNewWord = true;
					break;
				}
			}
		} else {
			if (c[0] == ' ' || c[0] == '\n' || c[0] == '\t' || c[0] == ',') {
				bNewWord = true;
			}
		}

		if (bNewWord) {
			if (start) {
				start = false;
				avVec.push_back(str);
				str = "";
			}
		} else {
			start = true;
			str += c;
			if (i == (int)asData.size() - 1)
				avVec.push_back(str);
		}
	}

	return avVec;
}

//-----------------------------------------------------------------------

/// Helper
// returns last char in a string
int cString::GetLastStringPos(tString aString, tString aChar) {
	int pos = -1;
	for (int i = 0; i < (int)aString.size(); i++) {
		if (aString.substr(i, aChar.size()) == aChar)
			pos = i;
	}
	return pos;
}

/// Helper
// returns last char in a string
int cString::GetLastStringPosW(tWString aString, tWString aChar) {
	int pos = -1;
	for (int i = 0; i < (int)aString.size(); i++) {
		if (aString.substr(i, aChar.size()) == aChar)
			pos = i;
	}
	return pos;
}

//-----------------------------------------------------------------------

void cString::UIntStringToArray(unsigned int *apArray, const char *apString, int alSize) {
	char vTempChar[20];
	int lTempCharCount = 0;

	int lArrayCount = 0;
	int lStringCount = 0;

	while (lArrayCount < alSize) {
		char c = apString[lStringCount];

		// if a space is found, convert the previous characters to a float.
		if (c == ' ' || c == 0) {
			if (lTempCharCount > 0) {
				vTempChar[lTempCharCount] = 0;
				apArray[lArrayCount] = (unsigned int)atoi(vTempChar);

				lTempCharCount = 0;
				lArrayCount++;
			}
		}
		// If character is not a space, add to temp char.
		else {
			vTempChar[lTempCharCount] = c;
			lTempCharCount++;
		}

		lStringCount++;
	}
}

//-----------------------------------------------------------------------

void cString::FloatStringToArray(float *apArray, const char *apString, int alSize) {
	char vTempChar[20];
	int lTempCharCount = 0;

	int lArrayCount = 0;
	int lStringCount = 0;

	while (lArrayCount < alSize) {
		char c = apString[lStringCount];
		// if a space is found, convert the previous characters to a float.
		if (c == ' ' || c == 0) {
			if (lTempCharCount > 0) {
				vTempChar[lTempCharCount] = 0;
				apArray[lArrayCount] = (float)atof(vTempChar);

				lTempCharCount = 0;
				lArrayCount++;
			}
		}
		// If character is not a space, add to temp char.
		else {
			vTempChar[lTempCharCount] = apString[lStringCount];
			lTempCharCount++;
		}

		lStringCount++;
	}
}

//-----------------------------------------------------------------------

} // namespace hpl
