/*
    NitroHax -- Cheat tool for the Nintendo DS
    Copyright (C) 2008  Michael "Chishm" Chisholm

    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/>.
*/

#include <nds.h>
#include <fat.h>
#include <nds/fifocommon.h>

#include <stdio.h>
#include <string.h>
#include <malloc.h>
#include <list>

#include "inifile.h"
#include "bootsplash.h"
#include "bootsplash2.h"
#include "launch_engine.h"
#include "crc.h"
#include "version.h" 

sNDSHeader ndsHeader;

off_t getFileSize(const char *fileName) {
    FILE* fp = fopen(fileName, "rb");
    off_t fsize = 0;
    if (fp) {
        fseek(fp, 0, SEEK_END);
        fsize = ftell(fp);			// Get source file's size
		fseek(fp, 0, SEEK_SET);
	}
	fclose(fp);

	return fsize;
}

int main() {

	defaultExceptionHandler();
	
	// bool consoleInited = false;
	bool scfgUnlock = false;
	bool TWLMODE = false;
	bool TWLEXTRAM = false;
	bool TWLCLK = false;	// false == NTR, true == TWL
	bool TWLVRAM = false;
	bool soundFreq = false;
	bool EnableSD = false;
	bool slot1Init = false;	
	
	bool UseAnimatedSplash = false;
	bool UseNTRSplash = true;
	bool HealthAndSafety_MSG = true;
	
	int language = -1;
	
	bool DebugMode = false;
	
	u32 ndsHeader[0x80];

	if (fatInitDefault()) {
		CIniFile ntrlauncher_config( "sd:/NDS/NTR_Launcher.ini" );
		
		TWLCLK = ntrlauncher_config.GetInt("NTRLAUNCHER","TWLCLOCK",0);
		TWLVRAM = ntrlauncher_config.GetInt("NTRLAUNCHER","TWLVRAM",0);
		TWLEXTRAM = ntrlauncher_config.GetInt("NTRLAUNCHER","TWLEXTRAM",0);
		TWLMODE = ntrlauncher_config.GetInt("NTRLAUNCHER","TWLMODE",0);		
		soundFreq = ntrlauncher_config.GetInt("NTRLAUNCHER","SOUNDFREQ",0);
		// EnableSD = ntrlauncher_config.GetInt("NTRLAUNCHER","SDACCESS",0);
		scfgUnlock = ntrlauncher_config.GetInt("NTRLAUNCHER","SCFGUNLOCK",0);
		slot1Init = ntrlauncher_config.GetInt("NTRLAUNCHER","RESETSLOT1",0);		
		UseAnimatedSplash = ntrlauncher_config.GetInt("NTRLAUNCHER","ANIMATEDSPLASH",0);
		UseNTRSplash = ntrlauncher_config.GetInt("NTRLAUNCHER","NTRSPLASH",0);		
		HealthAndSafety_MSG = ntrlauncher_config.GetInt("NTRLAUNCHER","HEALTHSAFETYSPLASH",0);
		
		DebugMode = ntrlauncher_config.GetInt("NTRLAUNCHER","DEBUGMODE",0);
		
		language = ntrlauncher_config.GetInt("NTRLAUNCHER", "LANGUAGE", -1);
		
		
		if(slot1Init) {
			fifoSendValue32(FIFO_USER_04, 1);
			for (int i = 0; i < 25; i++) { swiWaitForVBlank(); }
		}
	} else {		
		fifoSendValue32(FIFO_USER_04, 1);
	}
	
	if (!UseAnimatedSplash) { 
		BootSplashInit(); 
		if (REG_SCFG_MC == 0x11) {
			do { CartridgePrompt(); }
			while (REG_SCFG_MC == 0x11);
			fifoSendValue32(FIFO_USER_02, 1);
			for (int i = 0; i < 25; i++) { swiWaitForVBlank(); }
		}
	} else {
		char *p = (char*)PersonalData->name;
		for (int i = 0; i < 10; i++) {
			if (p[i*2] == 0x00) {
				p[i*2/2] = 0;
			} else {
				p[i*2/2] = p[i*2];
			}
		}
	
		if (language == -1) { language = (PersonalData->language); }
	
		BootSplashInit2(UseNTRSplash, HealthAndSafety_MSG, language, false);
	}
	
	// If card is inserted but slot is powered off, turn slot-1 back on. This can happen with certain flashcarts that do not show up
	// in DSi's System Menu. The console will always boot with the slot powered off for these type of cards.
	// This is not an issue on 3DS however. TWL_FIRM doesn't care and will still power slot-1 as long as some kind of valid cart is
	// inserted.
	if(REG_SCFG_MC == 0x10) { fifoSendValue32(FIFO_USER_02, 1); }
	
	fifoSendValue32(FIFO_USER_01, 1);
	fifoWaitValue32(FIFO_USER_03);
	
	for (int i = 0; i < 30; i++) { swiWaitForVBlank(); }
	
	sysSetCardOwner (BUS_OWNER_ARM9);
	
	cardReadHeader((uint8*)&ndsHeader);
	
	for (int i = 0; i < 30; i++) { swiWaitForVBlank(); }

	while(1) {
		// If SCFG_MC is returning as zero/null, this means SCFG_EXT registers are locked on arm9 or user attempted to run this while in NTR mode.
		if((REG_SCFG_MC == 0x00) | (REG_SCFG_MC == 0x11) | (REG_SCFG_MC == 0x10)) {
			if (UseAnimatedSplash) {
				BootSplashInit2(false, false, 0, true);
			} else {
				ErrorScreen();
				for (int i = 0; i < 300; i++) { swiWaitForVBlank(); }
			}
			break;
		} else {
			runLaunchEngine (EnableSD, language, scfgUnlock, TWLMODE, TWLCLK, TWLVRAM, soundFreq, TWLEXTRAM, DebugMode);
		}
	}
	return 0;
}