/****************************************************************************
 * Copyright (C) 2011 Dimok
 *
 * 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 <unistd.h>
#include <dirent.h>
#include <sys/stat.h>

#include "GCGames.h"
#include "FileOperations/fileops.h"
#include "settings/GameTitles.h"
#include "settings/CSettings.h"
#include "prompts/GCDeleteMenu.h"
#include "prompts/PromptWindows.h"
#include "prompts/ProgressWindow.h"
#include "language/gettext.h"
#include "usbloader/wbfs/wbfs_fat.h"
#include "utils/tools.h"
#include "system/IosLoader.h"
#include "menu.h"
#include "gecko.h"
#include "cache/cache.hpp"

GCGames *GCGames::instance = NULL;

inline bool isGameID(const u8 *id)
{
	for (int i = 0; i < 6; i++)
		if (!isalnum((int)id[i]))
			return false;

	return true;
}

const char *GCGames::GetPath(const char *gameID) const
{
	if (!gameID)
		return "";

	for (u32 i = 0; i < HeaderList.size(); i++)
	{
		if (strncasecmp((const char *)HeaderList[i].id, gameID, 6) == 0)
			return PathList[i].c_str();
	}

	return "";
}

void GCGames::LoadGameList(const string &path, vector<struct discHdr> &headerList, vector<string> &pathList)
{
	struct discHdr tmpHdr;
	struct stat st;
	u8 id[8];
	u8 disc_number = 0;
	char fpath[1024];
	char fname_title[64];
	DIR *dir_iter;
	struct dirent *dirent;

	dir_iter = opendir(path.c_str());
	if (!dir_iter)
		return;

	while ((dirent = readdir(dir_iter)) != 0)
	{
		const char *dirname = dirent->d_name;
		if (!dirname)
			continue;

		if (dirname[0] == '.')
			continue;

		// reset id and title
		memset(id, 0, sizeof(id));
		*fname_title = 0;

		bool lay_a = false;
		bool lay_b = false;
		int len = strlen(dirname);
		if (len >= 8)
		{
			if (Wbfs_Fat::CheckLayoutB((char *)dirname, len, id, fname_title))
			{
				// path/TITLE[GAMEID]/game.iso
				lay_b = true;
			}
			else if (dirname[6] == '_')
			{
				// path/GAMEID_TITLE/game.iso
				memcpy(id, dirname, 6);

				if (isGameID(id))
				{
					lay_a = true;
					snprintf(fname_title, sizeof(fname_title), "%s", &dirname[7]);
				}
			}
		}
		else if (len == 6 && isGameID((u8 *)dirname))
		{
			memcpy(id, dirname, 6);
			lay_a = true;
		}

		if (!lay_a && !lay_b)
			memset(id, 0, sizeof(id));

		bool found = false;
		bool extracted = false;

		for (int i = 0; i < 4; i++)
		{
			char name[50];
			snprintf(name, sizeof(name), "%.6s.%s", (i % 2) == 0 ? "game" : (char *)id, i >= 2 ? "gcm" : "iso");
			snprintf(fpath, sizeof(fpath), "%s%s/%s", path.c_str(), dirname, name);
			if ((found = (stat(fpath, &st) == 0)) == true)
				break;
		}

		// Check if only disc2.iso is present
		if (!found)
		{
			for (int i = 0; i < 2; i++)
			{
				char name[50];
				snprintf(name, sizeof(name), "disc2.%s", (i % 2) == 0 ? "gcm" : "iso"); // allow gcm, though DM(L) require "disc2.iso" filename
				snprintf(fpath, sizeof(fpath), "%s%s/%s", path.c_str(), dirname, name);
				if ((found = (stat(fpath, &st) == 0)) == true)
				{
					disc_number = 1;
					break;
				}
			}
		}

		if (!found)
		{
			snprintf(fpath, sizeof(fpath), "%s%s/sys/boot.bin", path.c_str(), dirname);
			if (stat(fpath, &st) != 0)
				continue;
			// this game is extracted
			extracted = true;
		}

		//! GAMEID was not found
		if (!lay_a && !lay_b)
		{
			// read game ID and title from disc header
			// iso file
			FILE *fp = fopen(fpath, "rb");
			if (fp != NULL)
			{
				memset(&tmpHdr, 0, sizeof(tmpHdr));
				fread(&tmpHdr, sizeof(struct discHdr), 1, fp);
				fclose(fp);

				if (tmpHdr.gc_magic == GCGames::MAGIC)
				{
					memcpy(id, tmpHdr.id, 6);
					snprintf(fname_title, sizeof(fname_title), "%s", tmpHdr.title);
				}
			}
		}

		// if we have titles.txt entry use that
		const char *title = GameTitles.GetTitle(id);

		// if no titles.txt get title from dir or file name
		if (strlen(title) == 0 && !Settings.ForceDiscTitles && strlen(fname_title) > 0)
			title = fname_title;

		if (*id != 0 && strlen(title) > 0)
		{
			string gamePath = string(path) + dirname + (extracted ? "/" : strrchr(fpath, '/'));
			memset(&tmpHdr, 0, sizeof(tmpHdr));
			memcpy(tmpHdr.id, id, sizeof(tmpHdr.id));
			snprintf(tmpHdr.title, sizeof(tmpHdr.title), "%s", title);
			tmpHdr.magic = GCGames::MAGIC;
			tmpHdr.type = extracted ? TYPE_GAME_GC_EXTRACTED : TYPE_GAME_GC_IMG;
			tmpHdr.disc_no = disc_number;
			headerList.push_back(tmpHdr);
			pathList.push_back(gamePath);
			continue;
		}

		// else read it from file directly
		// iso file
		FILE *fp = fopen(fpath, "rb");
		if (fp != NULL)
		{
			memset(&tmpHdr, 0, sizeof(tmpHdr));
			fread(&tmpHdr, sizeof(struct discHdr), 1, fp);
			fclose(fp);

			if (tmpHdr.gc_magic == GCGames::MAGIC)
			{
				string gamePath = string(path) + dirname + (extracted ? "/" : strrchr(fpath, '/'));
				tmpHdr.magic = tmpHdr.gc_magic;
				tmpHdr.type = extracted ? TYPE_GAME_GC_EXTRACTED : TYPE_GAME_GC_IMG;
				headerList.push_back(tmpHdr);
				pathList.push_back(gamePath);

				// Save title for next start
				GameTitles.SetGameTitle(tmpHdr.id, tmpHdr.title);
			}
		}
	}

	closedir(dir_iter);
}

u32 GCGames::LoadAllGames(void)
{
	if (Settings.UseGameHeaderCache && isCacheFile(GAMECUBE_HEADER_CACHE_FILE))
	{
		if (HeaderList.empty() && PathList.empty())
			LoadGameHeaderCache(HeaderList, PathList);
		if (!HeaderList.empty())
			return (int)HeaderList.size();
	}

	PathList.clear();
	HeaderList.clear();
	sdGCList.clear();
	sdGCPathList.clear();

	if (strcmp(Settings.GameCubePath, Settings.GameCubeSDPath) == 0 || Settings.GameCubeSource != GC_SOURCE_SD)
		LoadGameList(Settings.GameCubePath, HeaderList, PathList);

	if (strcmp(Settings.GameCubePath, Settings.GameCubeSDPath) != 0 && (Settings.GameCubeSource != GC_SOURCE_MAIN))
	{
		LoadGameList(Settings.GameCubeSDPath, sdGCList, sdGCPathList);

		for (u32 i = 0; i < sdGCList.size(); ++i)
		{
			if (Settings.GameCubeSource != GC_SOURCE_SD)
			{
				u32 n;
				for (n = 0; n < HeaderList.size(); ++n)
				{
					//! Display only one game if it is present on both SD and USB.
					if (memcmp(HeaderList[n].id, sdGCList[i].id, 6) == 0)
					{
						if ((Settings.GameCubeSource == GC_SOURCE_MAIN_SD) ||
							(Settings.GameCubeSource == GC_SOURCE_AUTO && (IosLoader::GetMIOSInfo() == DIOS_MIOS || IosLoader::GetMIOSInfo() == QUADFORCE_USB))) // DIOS MIOS - Show the game on USB in priority
						{
							break;
						}
						else // replace the one loaded from USB with the same games on SD
						{
							memcpy(&HeaderList[n], &sdGCList[i], sizeof(struct discHdr));
							PathList[n] = sdGCPathList[i];
							break;
						}
					}
				}

				// Not available in the main GC path
				if (n == HeaderList.size())
				{
					HeaderList.push_back(sdGCList[i]);
					PathList.push_back(sdGCPathList[i]);
				}
			}
			else // GC_SOURCE_SD
			{
				HeaderList.push_back(sdGCList[i]);
				PathList.push_back(sdGCPathList[i]);
			}
		}
	}

	if (Settings.UseGameHeaderCache && !HeaderList.empty() && !PathList.empty())
		SaveGameHeaderCache(HeaderList, PathList);

	return HeaderList.size();
}

bool GCGames::RemoveGame(const char *gameID)
{
	const char *path = GetPath(gameID);
	if (*path == 0)
		return false;

	RemoveSDGame(gameID);

	if (strcmp(Settings.GameCubePath, Settings.GameCubeSDPath) == 0)
		return true;

	struct discHdr *header = NULL;
	for (u32 i = 0; i < HeaderList.size(); ++i)
	{
		if (strncmp(gameID, (char *)HeaderList[i].id, 6) == 0)
		{
			header = &HeaderList[i];
			break;
		}
	}
	if (!header)
		return false;

	char filepath[512];
	int result = 0;

	// the main path is the SD path as it is prefered, now delete USB
	char cIsoPath[256];
	snprintf(cIsoPath, sizeof(cIsoPath), "%s", path + strlen(Settings.GameCubeSDPath));

	if (header->type == TYPE_GAME_GC_IMG)
	{
		// Remove game iso
		snprintf(filepath, sizeof(filepath), "%s%s", Settings.GameCubePath, cIsoPath);
		if (!RemoveFile(filepath))
			result = -1;

		// Remove path
		char *pathPtr = strrchr(filepath, '/');
		if (pathPtr)
			*pathPtr = 0;
		if (!RemoveFile(filepath))
			result = -1;
	}
	else if (header->type == TYPE_GAME_GC_EXTRACTED)
	{
		//! remove extracted gamecube game
		snprintf(filepath, sizeof(filepath), "%s%s", Settings.GameCubePath, cIsoPath);
		if (!RemoveDirectory(path))
			result = -1;
	}

	return (result == 0);
}

bool GCGames::RemoveSDGame(const char *gameID)
{
	const char *path = GetPath(gameID);
	if (*path == 0)
		return false;

	struct discHdr *header = NULL;
	for (u32 i = 0; i < HeaderList.size(); ++i)
	{
		if (strncmp(gameID, (char *)HeaderList[i].id, 6) == 0)
		{
			header = &HeaderList[i];
			break;
		}
	}
	if (!header)
		return false;

	char filepath[512];
	int result = 0;
	int ret;

	if (header->type == TYPE_GAME_GC_IMG)
	{
		// Remove game iso
		snprintf(filepath, sizeof(filepath), "%s", path);
		ret = RemoveFile(filepath);
		if (ret != 0)
			result = -1;

		// Remove path
		char *pathPtr = strrchr(filepath, '/');
		if (pathPtr)
			*pathPtr = 0;
		ret = RemoveFile(filepath);
		if (ret != 0)
			result = -1;
	}
	else if (header->type == TYPE_GAME_GC_EXTRACTED)
	{
		//! remove extracted gamecube game
		ret = RemoveDirectory(path);
		if (ret < 0)
			result = -1;
	}

	return (result == 0);
}

float GCGames::GetGameSize(const char *gameID)
{
	const char *path = GetPath(gameID);
	if (*path == 0)
		return 0.0f;

	struct stat st;

	if (stat(path, &st) != 0)
		return 0.0f;

	return ((float)st.st_size / GB_SIZE);
}

bool GCGames::IsInstalled(const char *gameID, u8 disc_number) const
{
	for (u32 n = 0; n < HeaderList.size(); n++)
	{
		if (memcmp(HeaderList[n].id, gameID, 6) == 0)
		{
			if (HeaderList[n].type == TYPE_GAME_GC_EXTRACTED || Settings.GCInstallCompressed)
				return true; // Multi-disc games in extracted form are currently unsupported by DML, no need to check further.

			if (HeaderList[n].disc_no == disc_number) // Disc number already in headerList. If Disc2 is loaded in headerList, then Disc1 is not installed yet
			{
				return true;
			}
			else if (disc_number == 1) // Check if the second Game Disc exists in the same folder than Disc1.
			{
				char filepath[512];
				int n = snprintf(filepath, sizeof(filepath), "%s", GetPath(gameID));
				char *pathPtr = strrchr(filepath, '/');
				if (pathPtr)
					*pathPtr = 0;
				snprintf(filepath + n, sizeof(filepath) - n, "/disc2.iso");
				if (CheckFile(filepath))
					return true;
			}
		}
	}
	return false;
}

bool GCGames::CopyUSB2SD(const struct discHdr *header)
{
	const char *path = GetPath((char *)header->id);
	int oldGameCubeSource = Settings.GameCubeSource;
	if (*path == 0)
		return false;

	int choice = WindowPrompt(tr("The game is on USB."), tr("Do you want to copy the game to SD or delete a game on SD?"), tr("Copy"), tr("Show SD"), tr("Cancel"));
	if (choice == 0)
		return false;

	const char *cpTitle = GameTitles.GetTitle(header);

	if (choice == 2)
	{
		// Load Games from SD card only
		Settings.GameCubeSource = GC_SOURCE_SD;
		GCGames::Instance()->LoadAllGames();

		GCDeleteMenu gcDeleteMenu;
		gcDeleteMenu.SetAlignment(ALIGN_CENTER, ALIGN_MIDDLE);
		gcDeleteMenu.SetEffect(EFFECT_FADE, 20);
		mainWindow->SetState(STATE_DISABLED);
		mainWindow->Append(&gcDeleteMenu);

		gcDeleteMenu.Show();

		gcDeleteMenu.SetEffect(EFFECT_FADE, -20);
		while (gcDeleteMenu.GetEffect() > 0)
			usleep(1000);

		mainWindow->Remove(&gcDeleteMenu);
		mainWindow->SetState(STATE_DEFAULT);

		// Reload user's gameCubeSource setting
		Settings.GameCubeSource = oldGameCubeSource;
		GCGames::Instance()->LoadAllGames();

		if (!WindowPrompt(tr("Do you want to copy now?"), cpTitle, tr("Yes"), tr("Cancel")))
			return false;
	}

	struct statvfs sd_vfs;
	if (statvfs(Settings.GameCubeSDPath, &sd_vfs) != 0)
	{
		WindowPrompt(tr("Error:"), tr("SD Card could not be accessed."), tr("OK"));
		return false;
	}

	u64 filesize = 0;

	if (header->type == TYPE_GAME_GC_IMG)
	{
		filesize = FileSize(path);
	}
	else if (header->type == TYPE_GAME_GC_EXTRACTED)
	{
		StartProgress(tr("Getting game folder size..."), tr("Please wait"), 0, true, true);
		ShowProgress(0, 1);
		filesize = FileSize(path);
		ProgressStop();
	}

	while (((u64)sd_vfs.f_frsize * (u64)sd_vfs.f_bfree) < filesize)
	{
		choice = WindowPrompt(tr("Error: Not enough space on SD."), tr("Do you want to delete a game on SD?"), tr("Yes"), tr("Cancel"));
		if (choice == 0)
			return false;

		GCDeleteMenu gcDeleteMenu;
		gcDeleteMenu.SetAlignment(ALIGN_CENTER, ALIGN_MIDDLE);
		gcDeleteMenu.SetEffect(EFFECT_FADE, 20);
		mainWindow->SetState(STATE_DISABLED);
		mainWindow->Append(&gcDeleteMenu);

		gcDeleteMenu.Show();

		gcDeleteMenu.SetEffect(EFFECT_FADE, -20);
		while (gcDeleteMenu.GetEffect() > 0)
			usleep(1000);

		mainWindow->Remove(&gcDeleteMenu);
		mainWindow->SetState(STATE_DEFAULT);

		statvfs(Settings.GameCubeSDPath, &sd_vfs);
	}

	const char *cIsoPath = path + strlen(Settings.GameCubePath);
	char destPath[512];
	snprintf(destPath, sizeof(destPath), "%s%s", Settings.GameCubeSDPath, cIsoPath);

	int res = -1;

	if (header->type == TYPE_GAME_GC_IMG)
	{
		ProgressCancelEnable(true);
		StartProgress(tr("Copying GC game..."), cpTitle, 0, true, true);

		char *ptr = strrchr(destPath, '/');
		if (ptr)
			*ptr = 0;

		CreateSubfolder(destPath);

		snprintf(destPath, sizeof(destPath), "%s%s", Settings.GameCubeSDPath, cIsoPath);

		res = CopyFile(path, destPath);
	}
	else if (header->type == TYPE_GAME_GC_EXTRACTED)
	{
		res = CopyDirectory(path, destPath);
	}

	// Refresh list
	GCGames::Instance()->LoadAllGames();

	ProgressStop();
	ProgressCancelEnable(false);

	if (res == PROGRESS_CANCELED)
	{
		if (header->type == TYPE_GAME_GC_IMG)
		{
			// remove file and path
			RemoveFile(destPath);
			char *ptr = strrchr(destPath, '/');
			if (ptr)
				*ptr = 0;
			RemoveFile(destPath);
		}

		WindowPrompt(tr("Copying Canceled"), 0, tr("OK"));
		return false;
	}
	else if (res < 0)
	{
		if (header->type == TYPE_GAME_GC_IMG)
		{
			// remove file and path
			RemoveFile(destPath);
			char *ptr = strrchr(destPath, '/');
			if (ptr)
				*ptr = 0;
			RemoveFile(destPath);
		}

		WindowPrompt(tr("Error:"), tr("Failed copying file"), tr("OK"));
		return false;
	}
	else
	{
		return WindowPrompt(tr("Successfully copied"), tr("Do you want to start the game now?"), tr("Yes"), tr("Cancel"));
	}
}

int nintendontBuildDate(const char *NIN_loader_path, char *NINBuildDate)
{

	char NIN_loader[100];
	snprintf(NIN_loader, sizeof(NIN_loader), "%sboot.dol", NIN_loader_path);
	if (!CheckFile(NIN_loader))
		snprintf(NIN_loader, sizeof(NIN_loader), "%sloader.dol", NIN_loader_path);
	if (CheckFile(NIN_loader))
	{
		u8 *buffer = NULL;
		u32 filesize = 0;
		const char *str = "Nintendont Loader";
		bool found = false;
		if (LoadFileToMem(NIN_loader, &buffer, &filesize))
		{
			for (u32 i = 0; i < filesize - 100; ++i)
			{
				if (memcmp(buffer + i, str, strlen(str)) == 0)
				{
					// Write buffer in NINheader
					char NINHeader[100];
					for (u8 j = 0; j < 99; j++)
						NINHeader[j] = *(u8 *)(buffer + i + j) == 0 ? ' ' : *(u8 *)(buffer + i + j); // replace \0 with a space.
					NINHeader[99] = '\0';

					// Search month string start position in header
					char *dateStart = NULL;
					const char *month[] = {"Jan ", "Feb ", "Mar ", "Apr ", "May ", "Jun ", "Jui ", "Aug ", "Sep ", "Oct ", "Nov ", "Dec "};
					for (u8 m = 0; m < 12; m++)
					{
						dateStart = strstr(NINHeader, month[m]);
						if (dateStart != NULL)
							break;
					}
					if (dateStart == NULL)
						break;

					dateStart[20] = '\0';

					sprintf(NINBuildDate, "%.20s", dateStart);
					gprintf("Nintendont Build date : %.20s \n", dateStart);

					found = true;
					break;
				}
			}
			free(buffer);
		}
		if (found)
			return 1;
	}

	return 0;
}

int nintendontVersion(const char *NIN_loader_path, char *NINVersion, int len)
{
	char NIN_loader[100];
	u32 NINRev = 0;
	snprintf(NIN_loader, sizeof(NIN_loader), "%sboot.dol", NIN_loader_path);
	if (!CheckFile(NIN_loader))
		snprintf(NIN_loader, sizeof(NIN_loader), "%sloader.dol", NIN_loader_path);
	if (CheckFile(NIN_loader))
	{
		u8 *buffer = NULL;
		u32 filesize = 0;
		const char *str = "$$Version:";
		if (LoadFileToMem(NIN_loader, &buffer, &filesize))
		{
			for (u32 i = 0; i < filesize; i += 32)
			{
				if (memcmp(buffer + i, str, strlen(str)) == 0)
				{
					// Write buffer in NINVersion
					snprintf(NINVersion, len, "%s", buffer + i + strlen(str));
					NINRev = atoi(strchr(NINVersion, '.') + 1);
					break;
				}
			}
			free(buffer);
		}
	}

	return NINRev;
}