/*
	Copyright 2021 flyinghead

	This file is part of Flycast.

    Flycast 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.

    Flycast 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 Flycast.  If not, see <https://www.gnu.org/licenses/>.
 */
#include "oslib/oslib.h"
#include "stdclass.h"
#include "file/file_path.h"
#ifndef _WIN32
#include <unistd.h>
#endif

const char *retro_get_system_directory();

extern char game_dir_no_slash[1024];
extern char vmu_dir_no_slash[PATH_MAX];
extern char content_name[PATH_MAX];
extern char g_roms_dir[PATH_MAX];
extern unsigned per_content_vmus;
extern std::string arcadeFlashPath;

namespace hostfs
{

std::string getVmuPath(const std::string& port, bool save)
{
	if ((per_content_vmus == 1 && port == "A1")
			|| per_content_vmus == 2)
	{
		std::string vmuDir = vmu_dir_no_slash + std::string(path_default_slash());
		if (settings.platform.isConsole() && !settings.content.gameId.empty())
		{
			constexpr std::string_view INVALID_CHARS { " /\\:*?|<>" };
			std::string vmuName = settings.content.gameId;
			for (char &c: vmuName)
				if (INVALID_CHARS.find(c) != INVALID_CHARS.npos)
					c = '_';
			vmuName += "." + port + ".bin";
			std::string wpath = vmuDir + vmuName;
			if (save || file_exists(wpath.c_str()))
				return wpath;
			// Legacy path with rom name
			std::string rpath = vmuDir + std::string(content_name) + "." + port + ".bin";
			if (file_exists(rpath.c_str()))
				return rpath;
			else
				return wpath;
		}
		return vmuDir + std::string(content_name) + "." + port + ".bin";
	}
	else {
		return std::string(game_dir_no_slash) + std::string(path_default_slash()) + "vmu_save_" + port + ".bin";
	}
}

std::string getArcadeFlashPath()
{
	return arcadeFlashPath;
}

std::string findFlash(const std::string& prefix, const std::string& names_ro)
{
   std::string root(game_dir_no_slash);
   root += "/";

	char base[512];
	char temp[512];
	char names[512];
	strcpy(names,names_ro.c_str());
	sprintf(base,"%s",root.c_str());

	char* curr=names;
	char* next;
	do
	{
		next=strstr(curr,";");
		if(next) *next=0;
		if (curr[0]=='%')
		{
			sprintf(temp,"%s%s%s",base,prefix.c_str(),curr+1);
		}
		else
		{
			sprintf(temp,"%s%s",base,curr);
		}

		curr=next+1;

		if (path_is_valid(temp))
			return temp;
	} while(next);

	return "";
}

std::string getFlashSavePath(const std::string& prefix, const std::string& name)
{
   std::string root(game_dir_no_slash);

	return root + path_default_slash() + prefix + name;
}

std::string findNaomiBios(const std::string& name)
{
	std::string basepath(game_dir_no_slash);
	basepath += path_default_slash() + name;
	if (!file_exists(basepath))
	{
		// File not found in system dir, try game dir instead
		basepath = g_roms_dir + name;
		if (!file_exists(basepath))
			return "";
	}
	return basepath;
}

std::string getSavestatePath(int index, bool writable)
{
	// Not used
	return "";
}

std::string getShaderCachePath(const std::string& filename)
{
	return std::string(game_dir_no_slash) + std::string(path_default_slash()) + filename;
}

std::string getTextureLoadPath(const std::string& gameId)
{
	return std::string(retro_get_system_directory()) + "/dc/textures/"
						+ gameId + path_default_slash();
}

std::string getTextureDumpPath()
{
	return std::string(game_dir_no_slash) + std::string(path_default_slash())
			+ "texdump" + std::string(path_default_slash());
}

std::string getScreenshotsPath()
{
	// Unfortunately retroarch doesn't expose its "screenshots" path
	return std::string(retro_get_system_directory()) + "/dc";
}

void saveScreenshot(const std::string& name, const std::vector<u8>& data)
{
	std::string path = getScreenshotsPath();
	path += "/" + name;
	FILE *f = nowide::fopen(path.c_str(), "wb");
	if (f == nullptr)
		throw FlycastException(path);
	if (std::fwrite(&data[0], data.size(), 1, f) != 1) {
		std::fclose(f);
		unlink(path.c_str());
		throw FlycastException(path);
	}
	std::fclose(f);
}

}

#if defined(_WIN32) || defined(__APPLE__)
void os_SetThreadName(const char *name) {
}
#endif