#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <math.h>
#include <dirent.h>
#include <ctype.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <sys/socket.h>
#include <switch/services/ncm.h>
#include <switch/services/ns.h>
#include <libxml2/libxml/globals.h>
#include <libxml2/libxml/xpath.h>
#include <curl/curl.h>
#include <json-c/json.h>

#include "dumper.h"
#include "fsext.h"
#include "ui.h"
#include "util.h"

extern int breaks;

extern u64 gameCardSize;
extern u64 gameCardTitleID;
extern u32 hfs0_partition_cnt;

const char *nswReleasesXmlUrl = "http://nswdb.com/xml.php";
const char *nswReleasesXmlTmpPath = "sdmc:/NSWreleases.xml.tmp";
const char *nswReleasesXmlPath = "sdmc:/NSWreleases.xml";
const char *nswReleasesRootElement = "releases";
const char *nswReleasesChildren = "release";
const char *nswReleasesChildrenImageSize = "imagesize";
const char *nswReleasesChildrenTitleID = "titleid";
const char *nswReleasesChildrenImgCrc = "imgcrc";
const char *nswReleasesChildrenReleaseName = "releasename";
const char *nswReleasesChildrenCard = "card";

const char *githubReleasesApiUrl = "https://api.github.com/repos/DarkMatterCore/gcdumptool/releases/latest";
const char *gcDumpToolTmpPath = "sdmc:/switch/gcdumptool.nro.tmp";
const char *gcDumpToolPath = "sdmc:/switch/gcdumptool.nro";

const char *userAgent = "gcdumptool/" APP_VERSION " (Nintendo Switch)";

static char *result_buf = NULL;
static size_t result_sz = 0;
static size_t result_written = 0;

bool isGameCardInserted(FsDeviceOperator* o)
{
    bool inserted;
	if (R_FAILED(fsDeviceOperatorIsGameCardInserted(o, &inserted))) return false;
    return inserted;
}

void syncDisplay()
{
    gfxFlushBuffers();
    gfxSwapBuffers();
    gfxWaitForVsync();
}

void delay(u8 seconds)
{
	if (!seconds) return;
	
	u64 nanoseconds = seconds * (u64)1000000000;
	svcSleepThread(nanoseconds);
	
	syncDisplay();
}

bool getGameCardTitleIDAndVersion(u64 *titleID, u32 *version)
{
	bool success = false;
	
	Result result;
	NcmContentMetaDatabase ncmDb;
	
	NcmApplicationContentMetaKey *appList = (NcmApplicationContentMetaKey*)malloc(sizeof(NcmApplicationContentMetaKey));
	if (appList)
	{
		memset(appList, 0, sizeof(NcmApplicationContentMetaKey));
		
		if (R_SUCCEEDED(result = ncmOpenContentMetaDatabase(FsStorageId_GameCard, &ncmDb)))
		{
			if (R_SUCCEEDED(result = ncmContentMetaDatabaseListApplication(&ncmDb, META_DATABASE_FILTER, appList, sizeof(NcmApplicationContentMetaKey), NULL, NULL)))
			{
				*titleID = appList->metaRecord.titleId;
				*version = appList->metaRecord.version;
				success = true;
			} else {
				uiStatusMsg("getGameCardTitleIDAndVersion: ncmContentMetaDatabaseListApplication failed! (0x%08X)", result);
			}
		} else {
			uiStatusMsg("getGameCardTitleIDAndVersion: ncmOpenContentMetaDatabase failed! (0x%08X)", result);
		}
		
		free(appList);
	} else {
		uiStatusMsg("getGameCardTitleIDAndVersion: Unable to allocate memory for the ncm service operations.");
	}
	
	return success;
}

void convertTitleVersionToDecimal(u32 version, char *versionBuf, int versionBufSize)
{
	u8 major = (u8)((version >> 26) & 0x3F);
	u8 middle = (u8)((version >> 20) & 0x3F);
	u8 minor = (u8)((version >> 16) & 0xF);
	u16 build = (u16)version;
	
	snprintf(versionBuf, versionBufSize, "%u (%u.%u.%u.%u)", version, major, middle, minor, build);
}

bool getGameCardControlNacp(u64 titleID, char *nameBuf, int nameBufSize, char *authorBuf, int authorBufSize)
{
	if (titleID == 0) return false;
	
	bool success = false;
	Result result;
	size_t outsize = 0;
	NsApplicationControlData *buf = NULL;
	NacpLanguageEntry *langentry = NULL;
	
	buf = (NsApplicationControlData*)malloc(sizeof(NsApplicationControlData));
	if (buf)
	{
		memset(buf, 0, sizeof(NsApplicationControlData));
		
		if (R_SUCCEEDED(result = nsGetApplicationControlData(1, titleID, buf, sizeof(NsApplicationControlData), &outsize)))
		{
			if (outsize >= sizeof(buf->nacp))
			{
				if (R_SUCCEEDED(result = nacpGetLanguageEntry(&buf->nacp, &langentry)))
				{
					strncpy(nameBuf, langentry->name, nameBufSize - 1);
					strncpy(authorBuf, langentry->author, authorBufSize - 1);
					success = true;
				} else {
					uiStatusMsg("getGameCardControlNacp: GetLanguageEntry failed! (0x%08X)", result);
				}
			} else {
				uiStatusMsg("getGameCardControlNacp: Control.nacp buffer size (%u bytes) is too small! Expected: %u bytes", outsize, sizeof(buf->nacp));
			}
		} else {
			uiStatusMsg("getGameCardControlNacp: GetApplicationControlData failed! (0x%08X)", result);
		}
		
		free(buf);
	} else {
		uiStatusMsg("getGameCardControlNacp: Unable to allocate memory for the ns service operations.");
	}
	
	return success;
}

int getSdCardFreeSpace(u64 *out)
{
	struct statvfs st;
	int rc;
	
	rc = statvfs("sdmc:/", &st);
	if (rc != 0)
	{
		uiStatusMsg("getSdCardFreeSpace: Unable to get SD card filesystem stats! statvfs: %d (%s).", errno, strerror(errno));
	} else {
		*out = (u64)(st.f_bsize * st.f_bfree);
	}
	
	return rc;
}

#define KiB (1024.0)
#define MiB (1024.0 * KiB)
#define GiB (1024.0 * MiB)

void convertSize(u64 size, char *out, int bufsize)
{
	char buffer[16];
	double bytes = (double)size;
	
	if (bytes < 1000.0)
	{
		snprintf(buffer, sizeof(buffer), "%.0lf B", bytes);
	} else
	if (bytes < 10.0*KiB)
	{
		snprintf(buffer, sizeof(buffer), "%.2lf KiB", floor((bytes*100.0)/KiB)/100.0);
	} else
	if (bytes < 100.0*KiB)
	{
		snprintf(buffer, sizeof(buffer), "%.1lf KiB", floor((bytes*10.0)/KiB)/10.0);
	} else
	if (bytes < 1000.0*KiB)
	{
		snprintf(buffer, sizeof(buffer), "%.0lf KiB", floor(bytes/KiB));
	} else
	if (bytes < 10.0*MiB)
	{
		snprintf(buffer, sizeof(buffer), "%.2lf MiB", floor((bytes*100.0)/MiB)/100.0);
	} else
	if (bytes < 100.0*MiB)
	{
		snprintf(buffer, sizeof(buffer), "%.1lf MiB", floor((bytes*10.0)/MiB)/10.0);
	} else
	if (bytes < 1000.0*MiB)
	{
		snprintf(buffer, sizeof(buffer), "%.0lf MiB", floor(bytes/MiB));
	} else
	if (bytes < 10.0*GiB)
	{
		snprintf(buffer, sizeof(buffer), "%.2lf GiB", floor((bytes*100.0)/GiB)/100.0);
	} else
	if (bytes < 100.0*GiB)
	{
		snprintf(buffer, sizeof(buffer), "%.1lf GiB", floor((bytes*10.0)/GiB)/10.0);
	} else {
		snprintf(buffer, sizeof(buffer), "%.0lf GiB", floor(bytes/GiB));
	}
	
	snprintf(out, bufsize, "%s", buffer);
}

void waitForButtonPress()
{
	uiDrawString("Press any button to continue", 0, breaks * 8, 255, 255, 255);
	
	syncDisplay();
	
	while(true)
	{
		hidScanInput();
		
		u32 keysDown = hidKeysDown(CONTROLLER_P1_AUTO);
		if (keysDown && !(keysDown & KEY_TOUCH)) break;
	}
}

bool isDirectory(char *path)
{
	DIR* dir = opendir(path);
	if (!dir) return false;
	
	closedir(dir);
	return true;
}

void addString(char **filenames, int *filenamesCount, char **nextFilename, const char *string)
{
	filenames[(*filenamesCount)++] = *nextFilename;
	strcpy(*nextFilename, string);
	*nextFilename += strlen(string) + 1;
}

static int sortAlpha(const void* a, const void* b)
{
	return strcasecmp(*((const char**)a), *((const char**)b));
}

void getDirectoryContents(char *filenameBuffer, char **filenames, int *filenamesCount, const char *directory, bool skipParent)
{
	struct dirent *ent;
	int i, maxFilenamesCount = *filenamesCount;
	char *nextFilename = filenameBuffer;
	
	char *slash = (char*)malloc(strlen(directory) + 2);
	memset(slash, 0, strlen(directory) + 2);
	snprintf(slash, strlen(directory) + 2, "%s/", directory);
	
	*filenamesCount = 0;
	
	if (!skipParent) addString(filenames, filenamesCount, &nextFilename, "..");
	
	DIR* dir = opendir(slash);
	if (dir)
	{
		for(i = 0; i < maxFilenamesCount; i++)
		{
			ent = readdir(dir);
			if (!ent) break;
			
			if ((strlen(ent->d_name) == 1 && !strcmp(ent->d_name, ".")) || (strlen(ent->d_name) == 2 && !strcmp(ent->d_name, ".."))) continue;
			
			addString(filenames, filenamesCount, &nextFilename, ent->d_name);
		}
		
		closedir(dir);
	}
	
	free(slash);
	
	// ".." should stay at the top
	qsort(filenames + 1, (*filenamesCount) - 1, sizeof(char*), &sortAlpha);
}

bool parseNSWDBRelease(xmlDocPtr doc, xmlNodePtr cur, u32 crc)
{
	xmlChar *key;
	xmlNodePtr node = cur;
	
	u8 imageSize = (u8)(gameCardSize / GAMECARD_SIZE_1GiB);
	u8 card = (hfs0_partition_cnt == GAMECARD_TYPE1_PARTITION_CNT ? 1 : 2);
	
	u8 xmlImageSize = 0;
	u64 xmlTitleID = 0;
	u32 xmlCrc = 0;
	u8 xmlCard = 0;
	char xmlReleaseName[256] = {'\0'};
	
	bool found = false;
	char strbuf[512] = {'\0'};
	
	while (node != NULL)
	{
		if ((!xmlStrcmp(node->name, (const xmlChar *)nswReleasesChildrenImageSize)))
		{
			key = xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
			
			xmlImageSize = (u8)atoi((const char*)key);
			
			xmlFree(key);
		} else
		if ((!xmlStrcmp(node->name, (const xmlChar *)nswReleasesChildrenTitleID)))
		{
			key = xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
			
			xmlTitleID = strtoull((const char*)key, NULL, 16);
			
			xmlFree(key);
		} else
		if ((!xmlStrcmp(node->name, (const xmlChar *)nswReleasesChildrenImgCrc)))
		{
			key = xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
			
			xmlCrc = strtoul((const char*)key, NULL, 16);
			
			xmlFree(key);
		}
		if ((!xmlStrcmp(node->name, (const xmlChar *)nswReleasesChildrenReleaseName)))
		{
			key = xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
			
			snprintf(xmlReleaseName, sizeof(xmlReleaseName) / sizeof(xmlReleaseName[0]), "%s", (char*)key);
			
			xmlFree(key);
		} else
		if ((!xmlStrcmp(node->name, (const xmlChar *)nswReleasesChildrenCard)))
		{
			key = xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
			
			xmlCard = (u8)atoi((const char*)key);
			
			xmlFree(key);
		}
		
		node = node->next;
	}
	
	//snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Cartridge Image Size: %u\nCartridge Title ID: %016lX\nCartridge Image CRC32: %08X\nCartridge Type: %u\n\nXML Image Size: %u\nXML Title ID: %016lX\nXML Image CRC32: %08X\nXML Release Name: %s\nXML Card Type: %u", imageSize, gameCardTitleID, crc, card, xmlImageSize, xmlTitleID, xmlCrc, xmlReleaseName, xmlCard);
	//uiDrawString(strbuf, 0, 0, 255, 255, 255);
	
	if (xmlImageSize == imageSize && xmlTitleID == gameCardTitleID && xmlCrc == crc && xmlCard == card)
	{
		snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Found matching Scene release: \"%s\" (CRC32: %08X). This is a good dump!", xmlReleaseName, xmlCrc);
		uiDrawString(strbuf, 0, breaks * 8, 0, 255, 0);
		
		found = true;
	} else {
		snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Dump doesn't match Scene release: \"%s\"! (CRC32: %08X)", xmlReleaseName, xmlCrc);
		uiDrawString(strbuf, 0, breaks * 8, 255, 0, 0);
	}
	
	breaks++;
	
	return found;
}

xmlXPathObjectPtr getNodeSet(xmlDocPtr doc, xmlChar *xpath)
{
	xmlXPathContextPtr context = NULL;
	xmlXPathObjectPtr result = NULL;
	
	context = xmlXPathNewContext(doc);
	result = xmlXPathEvalExpression(xpath, context);
	
	if (xmlXPathNodeSetIsEmpty(result->nodesetval))
	{
		xmlXPathFreeObject(result);
		return NULL;
	}
	
	return result;
}

void gameCardDumpNSWDBCheck(u32 crc)
{
	if (!gameCardTitleID || !hfs0_partition_cnt || !crc) return;
	
	xmlDocPtr doc = NULL;
	bool found = false;
	char strbuf[512] = {'\0'};
	
	doc = xmlParseFile(nswReleasesXmlPath);
	if (doc)
	{
		snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "//%s/%s[.//%s='%016lX']", nswReleasesRootElement, nswReleasesChildren, nswReleasesChildrenTitleID, gameCardTitleID);
		xmlXPathObjectPtr nodeSet = getNodeSet(doc, (xmlChar*)strbuf);
		if (nodeSet)
		{
			snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Found %d %s with Title ID \"%016lX\"", nodeSet->nodesetval->nodeNr, (nodeSet->nodesetval->nodeNr > 1 ? "releases" : "release"), gameCardTitleID);
			uiDrawString(strbuf, 0, breaks * 8, 255, 255, 255);
			breaks++;
			
			u32 i;
			for (i = 0; i < nodeSet->nodesetval->nodeNr; i++)
			{
				xmlNodePtr node = nodeSet->nodesetval->nodeTab[i]->xmlChildrenNode;
				
				found = parseNSWDBRelease(doc, node, crc);
				if (found) break;
			}
			
			if (!found)
			{
				uiDrawString("No matches found in XML document! This could either be a bad dump or an undumped cartridge.", 0, breaks * 8, 255, 0, 0);
			} else {
				breaks--;
			}
			
			xmlXPathFreeObject(nodeSet);
		} else {
			snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Error: unable to find records with Title ID \"%016lX\" within the XML document!", gameCardTitleID);
			uiDrawString(strbuf, 0, breaks * 8, 255, 0, 0);
		}
		
		xmlFreeDoc(doc);
	} else {
		snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Error: failed to open and/or parse \"%s\"!", nswReleasesXmlPath);
		uiDrawString(strbuf, 0, breaks * 8, 255, 0, 0);
	}
}

Result networkInit()
{
	Result result = socketInitializeDefault();
	if (R_SUCCEEDED(result)) curl_global_init(CURL_GLOBAL_ALL);
	return result;
}

void networkDeinit()
{
	curl_global_cleanup();
	socketExit();
}

size_t writeCurlFile(char *buffer, size_t size, size_t number_of_items, void *input_stream)
{
	size_t total_size = (size * number_of_items);
	if (fwrite(buffer, 1, total_size, input_stream) != total_size) return 0;
	return total_size;
}

static size_t writeCurlBuffer(char *buffer, size_t size, size_t number_of_items, void *input_stream)
{
	(void) input_stream;
	const size_t bsz = (size * number_of_items);
	
	if (result_sz == 0 || !result_buf)
	{
		result_sz = 0x1000;
		result_buf = (char*)malloc(result_sz);
		if (!result_buf) return 0;
	}
	
	bool need_realloc = false;
	
	while (result_written + bsz > result_sz) 
	{
		result_sz <<= 1;
		need_realloc = true;
	}
	
	if (need_realloc)
	{
		char *new_buf = (char*)realloc(result_buf, result_sz);
		if (!new_buf) return 0;
		result_buf = new_buf;
	}
	
	memcpy(result_buf + result_written, buffer, bsz);
	result_written += bsz;
	return bsz;
}

int versionNumCmp(char *ver1, char *ver2)
{
	typedef struct {
		int major;
		int minor;
		int build;
	} version_t;
	
	version_t versionNum1, versionNum2;
	memset(&versionNum1, 0, sizeof(version_t));
	memset(&versionNum2, 0, sizeof(version_t));
	
	int i, curPart, res;
	char *token, *rest;
	
	// Parse version string 1
	i = 0;
	rest = ver1;
	while((token = strtok_r(rest, ".", &rest)))
	{
		curPart = atoi(token);
		
		switch(i)
		{
			case 0:
				versionNum1.major = curPart;
				break;
			case 1:
				versionNum1.minor = curPart;
				break;
			case 2:
				versionNum1.build = curPart;
				break;
			default:
				break;
		}
		
		i++;
		if (i >= 3) break;
	}
	
	// Parse version string 2
	i = 0;
	rest = ver2;
	while((token = strtok_r(rest, ".", &rest)))
	{
		curPart = atoi(token);
		
		switch(i)
		{
			case 0:
				versionNum2.major = curPart;
				break;
			case 1:
				versionNum2.minor = curPart;
				break;
			case 2:
				versionNum2.build = curPart;
				break;
			default:
				break;
		}
		
		i++;
		if (i >= 3) break;
	}
	
	// Compare version_t structs
	if (versionNum1.major == versionNum2.major)
	{
		if (versionNum1.minor == versionNum2.minor)
		{
			if (versionNum1.build == versionNum2.build)
			{
				res = 0;
			} else
			if (versionNum1.build < versionNum2.build)
			{
				res = -1;
			} else {
				res = 1;
			}
		} else
		if (versionNum1.minor < versionNum2.minor)
		{
			res = -1;
		} else {
			res = 1;
		}
	} else
	if (versionNum1.major < versionNum2.major)
	{
		res = -1;
	} else {
		res = 1;
	}
	
	return res;
}

void updateNSWDBXml()
{
	Result result;
	CURL *curl;
	CURLcode res;
	long http_code = 0;
	double size = 0.0;
	char strbuf[512] = {'\0'};
	bool success = false;
	
	if (R_SUCCEEDED(result = networkInit()))
	{
		curl = curl_easy_init();
		if (curl)
		{
			FILE *nswdbXml = fopen(nswReleasesXmlTmpPath, "wb");
			if (nswdbXml)
			{
				snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Downloading XML database from \"%s\", please wait...", nswReleasesXmlUrl);
				uiDrawString(strbuf, 0, breaks * 8, 255, 255, 255);
				breaks++;
				
				syncDisplay();
				
				curl_easy_setopt(curl, CURLOPT_BUFFERSIZE, 102400L);
				curl_easy_setopt(curl, CURLOPT_URL, nswReleasesXmlUrl);
				curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writeCurlFile);
				curl_easy_setopt(curl, CURLOPT_WRITEDATA, nswdbXml);
				curl_easy_setopt(curl, CURLOPT_USERAGENT, userAgent);
				curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1L);
				curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1L);
				curl_easy_setopt(curl, CURLOPT_NOBODY, 0L);
				curl_easy_setopt(curl, CURLOPT_HEADER, 0L);
				curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
				curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
				curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 50L);
				
				res = curl_easy_perform(curl);
				
				curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_code);
				curl_easy_getinfo(curl, CURLINFO_SIZE_DOWNLOAD, &size);
				
				if (res == CURLE_OK && http_code >= 200 && http_code <= 299 && size > 0)
				{
					snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Successfully downloaded %.0lf bytes!", size);
					uiDrawString(strbuf, 0, breaks * 8, 0, 255, 0);
					success = true;
				} else {
					snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Error: failed to request XML database! HTTP status code: %ld", http_code);
					uiDrawString(strbuf, 0, breaks * 8, 255, 0, 0);
				}
				
				fclose(nswdbXml);
				
				if (success)
				{
					remove(nswReleasesXmlPath);
					rename(nswReleasesXmlTmpPath, nswReleasesXmlPath);
				} else {
					remove(nswReleasesXmlTmpPath);
				}
			} else {
				snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Error: failed to open \"%s\" in write mode!", nswReleasesXmlTmpPath);
				uiDrawString(strbuf, 0, breaks * 8, 255, 0, 0);
			}
			
			curl_easy_cleanup(curl);
		} else {
			uiDrawString("Error: failed to initialize CURL context!", 0, breaks * 8, 255, 0, 0);
		}
		
		networkDeinit();
	} else {
		snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Error: failed to initialize socket! (%08X)", result);
		uiDrawString(strbuf, 0, breaks * 8, 255, 0, 0);
	}
	
	breaks += 2;
}

void updateApplication()
{
	Result result;
	CURL *curl;
	CURLcode res;
	long http_code = 0;
	double size = 0.0;
	char strbuf[1024] = {'\0'}, downloadUrl[512] = {'\0'}, releaseTag[32] = {'\0'};
	bool success = false;
	struct json_object *jobj, *name, *assets;
	FILE *gcDumpToolNro = NULL;
	
	if (R_SUCCEEDED(result = networkInit()))
	{
		curl = curl_easy_init();
		if (curl)
		{
			snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Requesting latest release information from \"%s\"...", githubReleasesApiUrl);
			uiDrawString(strbuf, 0, breaks * 8, 255, 255, 255);
			breaks++;
			
			syncDisplay();
			
			curl_easy_setopt(curl, CURLOPT_BUFFERSIZE, 102400L);
			curl_easy_setopt(curl, CURLOPT_URL, githubReleasesApiUrl);
			curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writeCurlBuffer);
			curl_easy_setopt(curl, CURLOPT_USERAGENT, userAgent);
			curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1L);
			curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1L);
			curl_easy_setopt(curl, CURLOPT_NOBODY, 0L);
			curl_easy_setopt(curl, CURLOPT_HEADER, 0L);
			curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
			curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
			curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 50L);
			curl_easy_setopt(curl, CURLOPT_HTTP_VERSION, (long)CURL_HTTP_VERSION_2TLS);
			
			res = curl_easy_perform(curl);
			
			curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_code);
			curl_easy_getinfo(curl, CURLINFO_SIZE_DOWNLOAD, &size);
			
			if (res == CURLE_OK && http_code >= 200 && http_code <= 299 && size > 0)
			{
				snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Parsing response JSON data from \"%s\"...", githubReleasesApiUrl);
				uiDrawString(strbuf, 0, breaks * 8, 255, 255, 255);
				breaks++;
				
				syncDisplay();
				
				jobj = json_tokener_parse(result_buf);
				if (jobj != NULL)
				{
					if (json_object_object_get_ex(jobj, "name", &name) && json_object_get_type(name) == json_type_string)
					{
						snprintf(releaseTag, sizeof(releaseTag) / sizeof(releaseTag[0]), json_object_get_string(name));
						
						snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Latest release: %s", releaseTag);
						uiDrawString(strbuf, 0, breaks * 8, 255, 255, 255);
						breaks++;
						
						syncDisplay();
						
						// Compare versions
						if (releaseTag[0] == 'v' || releaseTag[0] == 'V' || releaseTag[0] == 'r' || releaseTag[0] == 'R') memmove(releaseTag, releaseTag + 1, strlen(releaseTag));
						
						if (versionNumCmp(releaseTag, APP_VERSION) > 0)
						{
							if (json_object_object_get_ex(jobj, "assets", &assets) && json_object_get_type(assets) == json_type_array)
							{
								assets = json_object_array_get_idx(assets, 0);
								if (assets != NULL)
								{
									if (json_object_object_get_ex(assets, "browser_download_url", &assets) && json_object_get_type(assets) == json_type_string)
									{
										snprintf(downloadUrl, sizeof(downloadUrl) / sizeof(downloadUrl[0]), json_object_get_string(assets));
										
										snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Download URL: \"%s\"", downloadUrl);
										uiDrawString(strbuf, 0, breaks * 8, 255, 255, 255);
										breaks++;
										
										syncDisplay();
										
										gcDumpToolNro = fopen(gcDumpToolTmpPath, "wb");
										if (gcDumpToolNro)
										{
											curl_easy_reset(curl);
											
											curl_easy_setopt(curl, CURLOPT_BUFFERSIZE, 102400L);
											curl_easy_setopt(curl, CURLOPT_URL, downloadUrl);
											curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writeCurlFile);
											curl_easy_setopt(curl, CURLOPT_WRITEDATA, gcDumpToolNro);
											curl_easy_setopt(curl, CURLOPT_USERAGENT, userAgent);
											curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1L);
											curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1L);
											curl_easy_setopt(curl, CURLOPT_NOBODY, 0L);
											curl_easy_setopt(curl, CURLOPT_HEADER, 0L);
											curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
											curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
											curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 50L);
											curl_easy_setopt(curl, CURLOPT_HTTP_VERSION, (long)CURL_HTTP_VERSION_2TLS);
											
											res = curl_easy_perform(curl);
											
											curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_code);
											curl_easy_getinfo(curl, CURLINFO_SIZE_DOWNLOAD, &size);
											
											if (res == CURLE_OK && http_code >= 200 && http_code <= 299 && size > 0)
											{
												snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Successfully downloaded %.0lf bytes!", size);
												uiDrawString(strbuf, 0, breaks * 8, 0, 255, 0);
												success = true;
											} else {
												snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Error: failed to request latest update binary! HTTP status code: %ld", http_code);
												uiDrawString(strbuf, 0, breaks * 8, 255, 0, 0);
											}
											
											fclose(gcDumpToolNro);
											
											if (success)
											{
												remove(gcDumpToolPath);
												rename(gcDumpToolTmpPath, gcDumpToolPath);
											} else {
												remove(gcDumpToolTmpPath);
											}
										} else {
											snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Error: failed to open \"%s\" in write mode!", gcDumpToolTmpPath);
											uiDrawString(strbuf, 0, breaks * 8, 255, 0, 0);
										}
									} else {
										uiDrawString("Error: unable to parse download URL from JSON response!", 0, breaks * 8, 255, 0, 0);
									}
								} else {
									uiDrawString("Error: unable to parse object at index 0 from \"assets\" array in JSON response!", 0, breaks * 8, 255, 0, 0);
								}
							} else {
								uiDrawString("Error: unable to parse \"assets\" array from JSON response!", 0, breaks * 8, 255, 0, 0);
							}
						} else {
							uiDrawString("You already have the latest version!", 0, breaks * 8, 255, 255, 255);
						}
					} else {
						uiDrawString("Error: unable to parse version tag from JSON response!", 0, breaks * 8, 255, 0, 0);
					}
					
					json_object_put(jobj);
				} else {
					uiDrawString("Error: unable to parse JSON response!", 0, breaks * 8, 255, 0, 0);
				}
			} else {
				snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Error: failed to request latest release information! HTTP status code: %ld", http_code);
				uiDrawString(strbuf, 0, breaks * 8, 255, 0, 0);
			}
			
			if (result_buf) free(result_buf);
			
			curl_easy_cleanup(curl);
		} else {
			uiDrawString("Error: failed to initialize CURL context!", 0, breaks * 8, 255, 0, 0);
		}
		
		networkDeinit();
	} else {
		snprintf(strbuf, sizeof(strbuf) / sizeof(strbuf[0]), "Error: failed to initialize socket! (%08X)", result);
		uiDrawString(strbuf, 0, breaks * 8, 255, 0, 0);
	}
	
	breaks += 2;
}

void removeIllegalCharacters(char *name)
{
	u32 i, len = strlen(name);
	for (i = 0; i < len; i++)
	{
		if (memchr("?[]/\\=+<>:;\",*|^", name[i], sizeof("?[]/\\=+<>:;\",*|^") - 1) || name[i] < 0x20 || name[i] > 0x7E) name[i] = '_';
	}
}

void strtrim(char *str)
{
	if (!str || !*str) return;
	
	char *start = str;
	char *end = start + strlen(str);
	
	while(--end >= start)
	{
		if (!isspace(*end)) break;
	}
	
	*(++end) = '\0';
	
	while(isspace(*start)) start++;
	
	if (start != str) memmove(str, start, end - start + 1);
}