/*
switch.c - switch backend
Copyright (C) 2021-2023 fgsfds

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.
*/

#include "platform/platform.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <switch.h>
#include <solder.h>
#include <SDL.h>

static int nxlink_sock = -1;

/* HACKHACK: force-export stuff required by the dynamic libs */

// libunwind stuff for C++ exceptions, required by filesystem_stdio
extern void *_Unwind_GetIPInfo;
extern void *_Unwind_Resume_or_Rethrow;
extern void *_Unwind_GetRegionStart;
extern void *_Unwind_Resume;
extern void *_Unwind_DeleteException;
extern void *_Unwind_RaiseException;
extern void *_Unwind_SetIP;
extern void *_Unwind_GetTextRelBase;
extern void *_Unwind_GetLanguageSpecificData;
extern void *_Unwind_SetGR;
extern void *_Unwind_GetDataRelBase;

// these are macros in our libc, so we need to wrap them
static int tolower_fn(int c) { return tolower(c); }
static int toupper_fn(int c) { return toupper(c); }
static int isalnum_fn(int c) { return isalnum(c); }
static int isalpha_fn(int c) { return isalpha(c); }

static const solder_export_t aux_exports[] =
{
	SOLDER_EXPORT("tolower", tolower_fn),
	SOLDER_EXPORT("toupper", toupper_fn),
	SOLDER_EXPORT("isalnum", isalnum_fn),
	SOLDER_EXPORT("isalpha", isalpha_fn),
	SOLDER_EXPORT_SYMBOL(mkdir),
	SOLDER_EXPORT_SYMBOL(remove),
	SOLDER_EXPORT_SYMBOL(rename),
	SOLDER_EXPORT_SYMBOL(fsync),
	SOLDER_EXPORT_SYMBOL(strchrnul),
	SOLDER_EXPORT_SYMBOL(stpcpy),
	SOLDER_EXPORT_SYMBOL(_Unwind_GetIPInfo),
	SOLDER_EXPORT_SYMBOL(_Unwind_Resume_or_Rethrow),
	SOLDER_EXPORT_SYMBOL(_Unwind_GetRegionStart),
	SOLDER_EXPORT_SYMBOL(_Unwind_Resume),
	SOLDER_EXPORT_SYMBOL(_Unwind_DeleteException),
	SOLDER_EXPORT_SYMBOL(_Unwind_RaiseException),
	SOLDER_EXPORT_SYMBOL(_Unwind_SetIP),
	SOLDER_EXPORT_SYMBOL(_Unwind_GetTextRelBase),
	SOLDER_EXPORT_SYMBOL(_Unwind_GetLanguageSpecificData),
	SOLDER_EXPORT_SYMBOL(_Unwind_SetGR),
	SOLDER_EXPORT_SYMBOL(_Unwind_GetDataRelBase),
};

const solder_export_t *__solder_aux_exports = aux_exports;
const size_t __solder_num_aux_exports = sizeof(aux_exports) / sizeof(*aux_exports);

/* end of export crap */

void Platform_ShellExecute( const char *path, const char *parms )
{
	Con_Reportf( S_WARN "Tried to shell execute ;%s; -- not supported\n", path );
}

#if XASH_MESSAGEBOX == MSGBOX_NSWITCH
void Platform_MessageBox( const char *title, const char *message, qboolean unused )
{
	// TODO: maybe figure out how to show an actual messagebox or an on-screen console
	//       without murdering the renderer
	// assume this is a fatal error
	FILE *f = fopen( "fatal.log", "w" );
	if ( f )
	{
		fprintf( f, "%s:\n%s\n", title, message );
		fclose( f );
	}
	// dump to nxlink as well
	fprintf( stderr, "%s:\n%s\n", title, message );
}
#endif // XASH_MESSAGEBOX == MSGBOX_NSWITCH

// this gets executed before main(), do not delete
void userAppInit( void )
{
	socketInitializeDefault( );
#ifdef NSWITCH_DEBUG
	nxlink_sock = nxlinkStdio( );
#endif
	if ( solder_init( 0 ) < 0 )
	{
		fprintf( stderr, "solder_init() failed: %s\n", solder_dlerror() );
		fflush( stderr );
		exit( 1 );
	}
}

// this gets executed on exit(), do not delete
void userAppExit( void )
{
	solder_quit( );
	if ( nxlink_sock >= 0 )
	{
		close( nxlink_sock );
		nxlink_sock = -1;
	}
	socketExit( );
}

void NSwitch_Init( void )
{
	printf( "NSwitch_Init\n" );
}

void NSwitch_Shutdown( void )
{
	printf( "NSwitch_Shutdown\n" );
	// force deinit everything SDL-related to avoid issues with changing games
	if ( SDL_WasInit( 0 ) )
		SDL_Quit( );
}