/*
 * Author Pavel Iakovlev
*/

#define MEMSIZE 4096*10

#include "../lib/io.h"
#include "../lib/obj/console.h"

byte initConsole = 0;

#include "stdcall.h"

#define bufferSize 10000;
#define memoryBrainfuck 30000*4
#define memoryByteBF 1
#define stackBrainFuck 4*1024

dword buffer = 0;
word bufferSymbol = 0;
dword memory = 0;

dword stack = 0;
dword code = 0;
byte tempBuffer[100] = {0};

void consoleInit()
{
	IF(!initConsole) 
	{
		load_dll(libConsole, #con_init, 0);
		con_init stdcall (-1, -1, -1, -1, "Lisp interpreter");
		initConsole = 0xFF;
	}
}

dword evalLisp()
{
	byte s = 0;
	byte args = 0;
	dword pos = 0;
	dword name = 0;
	dword tmp = 0;
	dword dataArgs = 0;
	dword posArgs = 0;
	dword ret = 0;
	dataArgs = malloc(16*4);
	posArgs = dataArgs;
	name = malloc(100);
	pos = name;
	loop()
	{
		s = DSBYTE[code];
		while(s == ' ')
		{
			code++;
			s = DSBYTE[code];
		}
		if (!s) || (s==')') 
		{
			code++;
			break;
		}
		if (!args) 
		{
			if(s>='A') && (s<='z') // name function
			{
				while (s>='A') && (s<='z')
				{
					DSBYTE[pos] = s;
					code++;
					s = DSBYTE[code];
					pos++;
				}
				code--;
			}
		}
		else
		{
			if(s == '(') 
			{
				code++;
				DSDWORD[posArgs] = evalLisp();
				posArgs += 4;
			}
			else if (s >= '0') && (s <= '9')
			{
				tmp = 0;
				while (s >= '0') && (s <= '9')
				{
					tmp *= 10;
					tmp += s-'0';
					code++;
					s = DSBYTE[code];
				}
				code--;
				DSDWORD[posArgs] = tmp;
				posArgs += 4;
			}
		}
		code++;
		args++;
	}
	args -= 2;
	ret = StdCall(args, name, dataArgs);
	free(name);
	free(dataArgs);
	return ret;
}


void main()
{
	dword brainFuckCode = 0;
	word maxLoop = 1000;
	
	buffer = malloc(bufferSize);
	memory = malloc(memoryBrainfuck);
	stack = malloc(stackBrainFuck);
	
	IF(DSBYTE[I_Param])
	{
		IF(io.read(I_Param))
		{
			code = EAX;
			loop()
			{
				if(DSBYTE[code]!='(') break;
				else code++;
				evalLisp();
				if(DSBYTE[code]!=')') break;
				code++;
			}
		}
	}
	ELSE 
	{
		consoleInit();
		con_printf stdcall ("Lisp interpreter v1.0");
		WHILE(maxLoop)
		{
			con_printf stdcall ("\r\n\r\nEnter code: ");
			con_gets stdcall(buffer, bufferSize);
			code = EAX;
			con_printf stdcall ("Output: ");
			nextLispLine:
			if(DSBYTE[code]!='(') continue;
			else code++;
			evalLisp();
			if(DSBYTE[code]!=')') continue;
			code++;
			goto nextLispLine;
			maxLoop--;
		}
	}
	
	IF(initConsole) con_exit stdcall (0);
	ExitProcess();
}