/*
	ConsoleHepler.h
	Console처리용 helper object

	Created 2005/06, by JiYoung
*/


//=============================================
// Console helper
//=============================================

#include	<io.h>
#include	<fcntl.h>
#include	<sys/stat.h>
#include	<assert.h>
#include	<string>

#include	"ConsoleHelper.h"

bool ConsoleHelper::CollectCommandOutput(char *outputBuffer, const char **commandList)
{
	assert(outputBuffer!=NULL && commandList!=NULL);

	std::string _key;
	std::vector<std::string> arg;
	const char **c=commandList;
	char lineBuf[1024];
	char lineBuf2[1024];

	outputBuffer[0]=0;
	while (*c!=NULL) {
		_key=*(c++);
		processConsoleCommand(_key, (int)arg.size(), arg, lineBuf);
		if (lineBuf[0]!=0) {
			sprintf(lineBuf2, "%s %s\n", _key.c_str(), lineBuf);	// Key와 result를 join
			strcat(outputBuffer, lineBuf2); 
		}
	}

	return true;
}


bool ConsoleHelper::loadFromFile(const char *filename)		// File을 load해서 setupByConfigurationText()을 부른다
{
	int f=::_open(filename, _O_RDONLY | _O_TEXT, _S_IREAD | _S_IWRITE);
	if (f==-1) return false;

	long filesize=_lseek(f, 0, SEEK_END);
	_lseek(f, 0, SEEK_SET);

	char *text=new char[filesize*2];
	int n=::_read(f, text, filesize*2);
	text[n]=0;

	bool b=setupByConfigurationText(text);

	delete [] text;

	::_close(f);

	return b;
}


bool ConsoleHelper::saveToFile(const char *filename)		// buildConfigurationText()를 부른 다음 결과를 file save한다
{
	int f=::_open(filename, _O_WRONLY | _O_CREAT | _O_TRUNC | _O_TEXT, _S_IREAD | _S_IWRITE);
	if (f==-1) return false;

	const int BUFFERSIZE=16384;

	char *buffer=new char [BUFFERSIZE];
	buildConfigurationText(buffer);
	if (strlen(buffer) > BUFFERSIZE-1) {
		// BUFFER OVERFLOW : INCREASE BUFFER SIZE (..........)
		assert(0);
	}
	
	::_write(f, buffer, (unsigned int)strlen(buffer));
	::_close(f);

	delete [] buffer;

	return true;
}

namespace {
	size_t getLine(const char *str) {		// str부터 scan해서 한 라인이 끝나는 char수를 센다. \r\n포함
		size_t l=0;
		while ( (*str!=0)&&(*str!='\r')&&(*str!='\n') ) {	str++;	l++;	}
		while ((*str=='\r')||(*str=='\n') ) {	str++;	l++;	}
		return l;
	}

	size_t stripLine(const char *str, int *startPos)		// str부터 scan해서, strip된 line의 start pos와 length를 돌려준다
	{
		// 앞에서 strip
		(*startPos)=0;
		while ((*str==' ')||(*str=='\t')||(*str=='\r')||(*str=='\n')) {
			str++;
			(*startPos)++;
		}
		// 뒤에서 strip
		size_t len=strlen(str);
		const char *pEnd=str+len-1;
		while ( ((*pEnd==' ')||(*pEnd=='\t')||(*pEnd=='\r')||(*pEnd=='\n')) && (len>0) ) {
			pEnd--;
			len--;
		}
		return len;
	}
}


bool ConsoleHelper::setupByConfigurationText(const char *configText)
{
	// strtok를 사용하기 위해 버퍼 카피
	size_t len=strlen(configText);
	if (len==0) return false;

	char *buffer=new char[len+1];
	memcpy(buffer, configText, len);
	buffer[len]=0;

	const int LINESIZE=512;
	char line[512];
	char *linep=buffer;
	char *cmdp;
	char *argp;

	char dummyOutputBuffer[1024];

	// Get a line
	int strippedPos;
	size_t lineLength;
	int n, m;

	std::string _key;
	std::string _param;
	std::vector<std::string> arg;

	while (*linep!=0) {
		// Get a line
		lineLength=getLine(linep);
		assert(lineLength < LINESIZE);
		strncpy(line, linep, lineLength);
		line[lineLength]=0;
		linep+=lineLength;			// Go to next line

		// Strip line
		lineLength=stripLine(line, &strippedPos);
		cmdp=line+strippedPos;
		if (lineLength==0) continue;
		cmdp[lineLength]=0;

		// Remove comment
		n=(int)strcspn(cmdp, "!#");		// ! 이나 #으로 시작하면 커멘트 라인
		cmdp[n]=0;						// 커멘트 이후 삭제	
		lineLength=n;

		// Parse command
		n=(int)strcspn(cmdp, " \t\r\n");
		if (n==0) continue;
		cmdp[n]=0;		// Save key
		_key=cmdp;
		n++;

		arg.clear();
		while (n < (int)lineLength) {
			// Skip whitespaces
			m = (int)strspn(cmdp+n, " \t\r\n");
			argp=cmdp+n+m;
			n+=m;
			// Find end-of-arg
			m = (int)strcspn(argp,  " \t\r\n");
			n+=m;
			if (m!=0) {
				// Add argument
				argp[m]=0;
				_param=argp;
				arg.push_back(_param);
				n++;
			}
		}
		// Call processor
		processConsoleCommand(_key, (int)arg.size(), arg, dummyOutputBuffer);
	}

	return true;
}


/*
bool ConsoleHelper::buildConfigurationText(char *outputBuffer)
	// Status를 읽어서 config file을 build한다.
	//	outputBuffer: config file을 홀드할 '충분히 큰' 버퍼
{
	// EXAMPLE!!!
	const char *commandList[] = {		// Config file에 write할 커맨드 목록을 여기 적는다
		  "wttexture"
		, "wtwidth"
		, "wtlength"

		, "wt00color0"
		, "wt00color1"
		, "wt00u"
		, "wt00v"

		, "wt01color0"
		, "wt01color1"
		, "wt01u"
		, "wt01v"

		, "wt10color0"
		, "wt10color1"
		, "wt10u"
		, "wt10v"

		, "wt11color0"
		, "wt11color1"
		, "wt11u"
		, "wt11v"
		, NULL			// EOL
	};

	return CollectCommandOutput(outputBuffer, commandList);	// 여기서 그 결과를 gather해서 outputBuffer를 만든다
}
*/


//#define	KEY(str)	if (
#define	PRINTKEY_INT(buf, intv) {	sprintf(buf, "%d", intv);	}
#define	PRINTKEY_FLOAT(buf, floatv) {	sprintf(buf, "%f", floatv);	}
#define	PRINT_COLOR(buf, intv) {	sprintf(buf, "0x%08x", intv);}
#define	PRINT_HEX(buf, intv) {	sprintf(buf, "0x%x", intv);	}



/*
void ConsoleHelper::processConsoleCommand(std::string &key, int argc, std::vector<std::string> &argv, char *outputBuffer)
		// Game console에서 들어온 파라미터를 redirect한다
		// outputBuffer : 처리 결과를 sprintf()할 텍스트 버퍼. 여기 들어가는 결과가 콘솔 화면에 출력된다
{
	
}
*/