/*
 *  Copyright (C) 2008 Nuke (wiinuke@gmail.com)
 *
 *  this file is part of GeckoOS for USB Gecko
 *  http://www.usbgecko.com
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gccore.h>
#include <sys/unistd.h>
#include <ogc/ipc.h>
#include "fst.h"

#include "gecko.h"
#include "sys.h"
#include "mem2.hpp"

#include "patchcode.h"

#include "codehandler.h"
#include "codehandleronly.h"
#include "multidol.h"

#define FSTDIRTYPE 1
#define FSTFILETYPE 0
#define ENTRYSIZE 0xC

#define MAX_FILENAME_LEN	128

static u8 *codelistend;
void *codelist;

u32 gameconfsize = 0;
u32 *gameconf = NULL;

u8 debuggerselect = 0;

extern const u32 viwiihooks[4];
extern const u32 kpadhooks[4];
extern const u32 joypadhooks[4];
extern const u32 gxdrawhooks[4];
extern const u32 gxflushhooks[4];
extern const u32 ossleepthreadhooks[4];
extern const u32 axnextframehooks[4];
extern const u32 wpadbuttonsdownhooks[4];
extern const u32 wpadbuttonsdown2hooks[4];

int app_gameconfig_load(u8 *discid, const u8 *gameconfig, u32 tempgameconfsize)
{
	gameconfsize = 0;

	if (gameconf == NULL)
	{
		gameconf = MEM2_alloc(65536);
		if (gameconf == NULL)
			return -1;
	}
	
	if (gameconfig == NULL || tempgameconfsize == 0)
		return -2;
	
	u8 *tempgameconf = (u8 *)gameconfig;

	u32 ret;
	s32 gameidmatch, maxgameidmatch = -1, maxgameidmatch2 = -1;
	u32 i, numnonascii, parsebufpos;
	u32 codeaddr, codeval, codeaddr2, codeval2, codeoffset;
	u32 temp, tempoffset = 0;
	char parsebuffer[18];
	// Remove non-ASCII characters
	numnonascii = 0;
	for (i = 0; i < tempgameconfsize; i++)
	{
		if (tempgameconf[i] < 9 || tempgameconf[i] > 126)
			numnonascii++;
		else
			tempgameconf[i-numnonascii] = tempgameconf[i];
	}
	tempgameconfsize -= numnonascii;

	*(tempgameconf + tempgameconfsize) = 0;
	//gameconf = (tempgameconf + tempgameconfsize) + (4 - (((u32) (tempgameconf + tempgameconfsize)) % 4));

	for (maxgameidmatch = 0; maxgameidmatch <= 6; maxgameidmatch++)
	{
		i = 0;
		while (i < tempgameconfsize)
		{
			maxgameidmatch2 = -1;
			while (maxgameidmatch != maxgameidmatch2)
			{
				while (i != tempgameconfsize && tempgameconf[i] != ':') i++;
				if (i == tempgameconfsize) break;
				while ((tempgameconf[i] != 10 && tempgameconf[i] != 13) && (i != 0)) i--;
				if (i != 0) i++;
				parsebufpos = 0;
				gameidmatch = 0;
				while (tempgameconf[i] != ':')
				{
					if (tempgameconf[i] == '?')
					{
						parsebuffer[parsebufpos] = discid[parsebufpos];
						parsebufpos++;
						gameidmatch--;
						i++;
					}
					else if (tempgameconf[i] != 0 && tempgameconf[i] != ' ')
						parsebuffer[parsebufpos++] = tempgameconf[i++];
					else if (tempgameconf[i] == ' ')
						break;
					else
						i++;
					if (parsebufpos == 8) break;
				}
				parsebuffer[parsebufpos] = 0;
				if (strncasecmp("DEFAULT", parsebuffer, strlen(parsebuffer)) == 0 && strlen(parsebuffer) == 7)
				{
					gameidmatch = 0;
					goto idmatch;
				}
				if (strncmp((char *) discid, parsebuffer, strlen(parsebuffer)) == 0)
				{
					gameidmatch += strlen(parsebuffer);
				idmatch:
					if (gameidmatch > maxgameidmatch2)
						maxgameidmatch2 = gameidmatch;
				}
				while ((i != tempgameconfsize) && (tempgameconf[i] != 10 && tempgameconf[i] != 13)) i++;
			}
			while (i != tempgameconfsize && tempgameconf[i] != ':')
			{
				parsebufpos = 0;
				while ((i != tempgameconfsize) && (tempgameconf[i] != 10 && tempgameconf[i] != 13))
				{
					if (tempgameconf[i] != 0 && tempgameconf[i] != ' ' && tempgameconf[i] != '(' && tempgameconf[i] != ':')
						parsebuffer[parsebufpos++] = tempgameconf[i++];
					else if (tempgameconf[i] == ' ' || tempgameconf[i] == '(' || tempgameconf[i] == ':')
						break;
					else
						i++;
					if (parsebufpos == 17) break;
				}
				parsebuffer[parsebufpos] = 0;
				if (strncasecmp("codeliststart", parsebuffer, strlen(parsebuffer)) == 0 && strlen(parsebuffer) == 13)
				{
					sscanf((char *)(tempgameconf + i), " = %x", (unsigned int *)&codelist);
				}
				if (strncasecmp("codelistend", parsebuffer, strlen(parsebuffer)) == 0 && strlen(parsebuffer) == 11)
				{
					sscanf((char *)(tempgameconf + i), " = %x", (unsigned int *)&codelistend);
				}
				if (strncasecmp("poke", parsebuffer, strlen(parsebuffer)) == 0 && strlen(parsebuffer) == 4)
				{
					ret = sscanf((char *)tempgameconf + i, "( %x , %x", &codeaddr, &codeval);
					if (ret == 2)
					{
						*(gameconf + (gameconfsize / 4)) = 0;
						gameconfsize += 4;
						*(gameconf + (gameconfsize / 4)) = 0;
						gameconfsize += 8;
						*(gameconf + (gameconfsize / 4)) = codeaddr;
						gameconfsize += 4;
						*(gameconf + (gameconfsize / 4)) = codeval;
						gameconfsize += 4;
						DCFlushRange((void *) (gameconf + (gameconfsize / 4) - 5), 20);
					}
				}
				if (strncasecmp("pokeifequal", parsebuffer, strlen(parsebuffer)) == 0 && strlen(parsebuffer) == 11)
				{
					ret = sscanf((char *)(tempgameconf + i), "( %x , %x , %x , %x", &codeaddr, &codeval, &codeaddr2, &codeval2);
					if (ret == 4)
					{
						*(gameconf + (gameconfsize / 4)) = 0;
						gameconfsize += 4;
						*(gameconf + (gameconfsize / 4)) = codeaddr;
						gameconfsize += 4;
						*(gameconf + (gameconfsize / 4)) = codeval;
						gameconfsize += 4;
						*(gameconf + (gameconfsize / 4)) = codeaddr2;
						gameconfsize += 4;
						*(gameconf + (gameconfsize / 4)) = codeval2;
						gameconfsize += 4;
						DCFlushRange((void *) (gameconf + (gameconfsize / 4) - 5), 20);
					}
				}
				if (strncasecmp("searchandpoke", parsebuffer, strlen(parsebuffer)) == 0 && strlen(parsebuffer) == 13)
				{
					ret = sscanf((char *)(tempgameconf + i), "( %x%n", &codeval, &tempoffset);
					if (ret == 1)
					{
						gameconfsize += 4;
						temp = 0;
						while (ret == 1)
						{
							*(gameconf + (gameconfsize / 4)) = codeval;
							gameconfsize += 4;
							temp++;
							i += tempoffset;
							ret = sscanf((char *)(tempgameconf + i), " %x%n", &codeval, &tempoffset);
						}
						*(gameconf + (gameconfsize / 4) - temp - 1) = temp;
						ret = sscanf((char *)(tempgameconf + i), " , %x , %x , %x , %x", &codeaddr, &codeaddr2, &codeoffset, &codeval2);
						if (ret == 4)
						{
							*(gameconf + (gameconfsize / 4)) = codeaddr;
							gameconfsize += 4;
							*(gameconf + (gameconfsize / 4)) = codeaddr2;
							gameconfsize += 4;
							*(gameconf + (gameconfsize / 4)) = codeoffset;
							gameconfsize += 4;
							*(gameconf + (gameconfsize / 4)) = codeval2;
							gameconfsize += 4;
							DCFlushRange((void *) (gameconf + (gameconfsize / 4) - temp - 5), temp * 4 + 20);
						}
						else
							gameconfsize -= temp * 4 + 4;
					}
				}
				if (tempgameconf[i] != ':')
				{
					while ((i != tempgameconfsize) && (tempgameconf[i] != 10 && tempgameconf[i] != 13)) i++;
					if (i != tempgameconfsize) i++;
				}
			}
			if (i != tempgameconfsize) while ((tempgameconf[i] != 10 && tempgameconf[i] != 13) && (i != 0)) i--;
		}
	}
	MEM2_free(gameconf);
	return 0;
}

u8 *code_buf = NULL;
u32 code_size = 0;

int ocarina_load_code(const u8 *cheat, u32 cheatSize)
{
	if (debuggerselect == 0x00)
		codelist = (u8 *) 0x800022A8;
	else
		codelist = (u8 *) 0x800028B8;
	codelistend = (u8 *) 0x80003000;

	code_buf = (u8 *)cheat;
	code_size = cheatSize;

	if(code_size <= 0)
	{
		gprintf("Ocarina: No codes found\n");
		code_buf = NULL;
		code_size = 0;
		return 0;
	}

	if (code_size > (u32)codelistend - (u32)codelist)
	{
		gprintf("Ocarina: Too many codes found\n");
		code_buf = NULL;
		code_size = 0;
		return 0;
	}

    gprintf("Ocarina: Codes found.\n");

	return code_size;
}

void app_pokevalues()
{
	u32 i, *codeaddr, *codeaddr2, *addrfound = NULL;

	if (gameconfsize != 0)
	{
		for (i = 0; i < gameconfsize/4; i++)
		{
			if (*(gameconf + i) == 0)
			{
				if (((u32 *) (*(gameconf + i + 1))) == NULL ||
					*((u32 *) (*(gameconf + i + 1))) == *(gameconf + i + 2))
				{
					*((u32 *) (*(gameconf + i + 3))) = *(gameconf + i + 4);
					DCFlushRange((void *) *(gameconf + i + 3), 4);
				}
				i += 4;
			}
			else
			{
				codeaddr = (u32 *)*(gameconf + i + *(gameconf + i) + 1);
				codeaddr2 = (u32 *)*(gameconf + i + *(gameconf + i) + 2);
				if (codeaddr == 0 && addrfound != NULL)
					codeaddr = addrfound;
				else if (codeaddr == 0 && codeaddr2 != 0)
					codeaddr = (u32 *) ((((u32) codeaddr2) >> 28) << 28);
				else if (codeaddr == 0 && codeaddr2 == 0)
				{
					i += *(gameconf + i) + 4;
					continue;
				}
				if (codeaddr2 == 0)
					codeaddr2 = codeaddr + *(gameconf + i);
				addrfound = NULL;
				while (codeaddr <= (codeaddr2 - *(gameconf + i)))
				{
					if (memcmp(codeaddr, gameconf + i + 1, (*(gameconf + i)) * 4) == 0)
					{
						*(codeaddr + ((*(gameconf + i + *(gameconf + i) + 3)) / 4)) = *(gameconf + i + *(gameconf + i) + 4);
						if (addrfound == NULL) addrfound = codeaddr;
					}
					codeaddr++;
				}
				i += *(gameconf + i) + 4;
			}
		}
	}
}

void load_handler()
{
	if (hooktype != 0x00)
	{
		if (debuggerselect == 0x01)
		{
			//gprintf("Debbugger selected is gecko\n");
			memset((void*)0x80001800,0,codehandler_size);
			memcpy((void*)0x80001800,codehandler,codehandler_size);
			//if (pausedstartoption == 0x01)
			//	*(u32*)0x80002798 = 1;
			memcpy((void*)0x80001CDE, &codelist, 2);
			memcpy((void*)0x80001CE2, ((u8*) &codelist) + 2, 2);
			memcpy((void*)0x80001F5A, &codelist, 2);
			memcpy((void*)0x80001F5E, ((u8*) &codelist) + 2, 2);
			DCFlushRange((void*)0x80001800,codehandler_size);
		}
		else
		{
			//gprintf("Debbugger selected is not gecko\n");
			memset((void*)0x80001800,0,codehandleronly_size);
			memcpy((void*)0x80001800,codehandleronly,codehandleronly_size);
			memcpy((void*)0x80001906, &codelist, 2);
			memcpy((void*)0x8000190A, ((u8*) &codelist) + 2, 2);
			DCFlushRange((void*)0x80001800,codehandleronly_size);
		}

		// Load multidol handler
		memset((void*)0x80001000,0,multidol_size);
		memcpy((void*)0x80001000,multidol,multidol_size);
		DCFlushRange((void*)0x80001000,multidol_size);
		switch(hooktype)
		{
			case 0x01:
				memcpy((void*)0x8000119C,viwiihooks,12);
				memcpy((void*)0x80001198,viwiihooks+3,4);
				break;
			case 0x02:
				memcpy((void*)0x8000119C,kpadhooks,12);
				memcpy((void*)0x80001198,kpadhooks+3,4);
				break;
			case 0x03:
				memcpy((void*)0x8000119C,joypadhooks,12);
				memcpy((void*)0x80001198,joypadhooks+3,4);
				break;
			case 0x04:
				memcpy((void*)0x8000119C,gxdrawhooks,12);
				memcpy((void*)0x80001198,gxdrawhooks+3,4);
				break;
			case 0x05:
				memcpy((void*)0x8000119C,gxflushhooks,12);
				memcpy((void*)0x80001198,gxflushhooks+3,4);
				break;
			case 0x06:
				memcpy((void*)0x8000119C,ossleepthreadhooks,12);
				memcpy((void*)0x80001198,ossleepthreadhooks+3,4);
				break;
			case 0x07:
				memcpy((void*)0x8000119C,axnextframehooks,12);
				memcpy((void*)0x80001198,axnextframehooks+3,4);
				break;
			case 0x08:
				//if (customhooksize == 16)
				//{
				//	memcpy((void*)0x8000119C,customhook,12);
				//	memcpy((void*)0x80001198,customhook+3,4);
				//}
				break;
			case 0x09:
				//memcpy((void*)0x8000119C,wpadbuttonsdownhooks,12);
				//memcpy((void*)0x80001198,wpadbuttonsdownhooks+3,4);
				break;
			case 0x0A:
				//memcpy((void*)0x8000119C,wpadbuttonsdown2hooks,12);
				//memcpy((void*)0x80001198,wpadbuttonsdown2hooks+3,4);
				break;
		}
		DCFlushRange((void*)0x80001198,16);
	}
	memcpy((void *)0x80001800, (void*)0x80000000, 6);
}

int ocarina_do_code(u64 chantitle)
{
	//if (!code_buf) return 0;  // Need the handler loaded for hooking other than cheats!

	memset((void *)0x80001800, 0, 0x1800);

	char gameidbuffer[8];
	if(chantitle != 0)
	{
		memset(gameidbuffer, 0, 8);
		gameidbuffer[0] = (chantitle & 0xff000000) >> 24;
		gameidbuffer[1] = (chantitle & 0x00ff0000) >> 16;
		gameidbuffer[2] = (chantitle & 0x0000ff00) >> 8;
		gameidbuffer[3] = chantitle & 0x000000ff;
	}
	load_handler();

	if(chantitle != 0)
	{
		memcpy((void *)0x80001800, gameidbuffer, 8);
		DCFlushRange((void *)0x80001800, 8);
	}
	
	if(codelist)
		memset(codelist, 0, (u32)codelistend - (u32)codelist);

	//Copy the codes
	if (code_size > 0 && code_buf)
	{
		memcpy(codelist, code_buf, code_size);
		DCFlushRange(codelist, (u32)codelistend - (u32)codelist);
		MEM2_free(code_buf);
	}

	// TODO What's this???
	// enable flag
	//*(vu8*)0x80001807 = 0x01;

	//This needs to be done after loading the .dol into memory
	app_pokevalues();

	return 1;
}