// #pragma once

#ifndef LOAD_GAMECONTROLLERDB
#define LOAD_GAMECONTROLLERDB

#ifndef UNIT_32BLIT // SDL2 stuff only

#ifdef __cplusplus
extern "C" {
#endif

#include <sys/types.h>

#include <stdio.h>

# include <stdlib.h>
# include <stddef.h>
# include <stdarg.h>
# include <strings.h>
#include <string.h>

// SDL includes aren't availble on some linking... PITA
// #include "SDL.h"

//mgarcia updated to newer version for controller support

//#include "Input.hpp"
//#include "engine/input.hpp"
//#include "System.hpp"

#define SDL_Log //

#if 0 // NOTES

// SDL2 stuff only
#include "gamecontrollerdb.hpp"

/*
//https://github.com/gabomdq/SDL_GameControllerDB/blob/master/gamecontrollerdb.txt
gamecontrollerdb.hpp, serialized from gamecontrollerdb.txt file as string and size, ie:
assets.yml
gamecontrollerdb.hpp:
gamecontrollerdb.txt:
name: gamecontrollerdb
*/

// USEAGE

load_gamecontrollerdb( (const char *) gamecontrollerdb, gamecontrollerdb_length ); // SDL2 stuff only

#endif

//mgarcia
//defines private from: https://github.com/libsdl-org/SDL/blob/396411c09093660fead7999827e9f0db5ea2bc0e/src/joystick/SDL_gamecontroller.c#L47
#define SDL_CONTROLLER_PLATFORM_FIELD "platform:"
#define SDL_CONTROLLER_PLATFORM_FIELD_SIZE strlen(SDL_CONTROLLER_PLATFORM_FIELD)
#define SDL_CONTROLLER_HINT_FIELD "hint:"
#define SDL_CONTROLLER_HINT_FIELD_SIZE strlen(SDL_CONTROLLER_HINT_FIELD)

#define SDL_arraysize(array) (sizeof(array)/sizeof(array[0]))

// loads embedded gamecontrollerdb.txt, then trys to load gamecontrollerdb.txt in the current directory, then trys to opens connected controllers
// returns number of opened controllers

//extern "C"

extern "C" void *SDL_GameControllerOpen(int joystick_index);
extern "C" int SDL_NumJoysticks(void);
extern "C" int SDL_GameControllerAddMapping(const char* mappingString);
extern "C" void *SDL_RWFromFile(const char *file, const char *mode);

extern "C" int SDL_GameControllerAddMappingsFromRW(void * rw, int freerw);

#define SDL_GameControllerAddMappingsFromFile(file) SDL_GameControllerAddMappingsFromRW(SDL_RWFromFile(file, "rb"), 1)

extern "C" const char * SDL_GetPlatform (void);

int load_gamecontrollerdb(const char *db_str, const uint32_t db_size)
{

const char *platform = SDL_GetPlatform();
int controllers = 0;
char *buf, *line, *line_end, *tmp, *comma, line_platform[64];
size_t platform_len;

// buf = (char *)SDL_calloc(1, db_size + 1);
buf = (char *)calloc(1, db_size + 1);
if (buf == NULL) {
// return SDL_SetError("Could not allocate space to read DB into memory");
printf("Could not allocate space to read DB into memory");
return -1;
}

memcpy(buf, db_str, db_size );

line = buf;

while (line < buf + db_size) {
// line_end = SDL_strchr(line, '\n');
line_end = strchr(line, '\n');
if (line_end != NULL) {
*line_end = '\0';
} else {
line_end = buf + db_size;
}

/* Extract and verify the platform */
// tmp = SDL_strstr(line, SDL_CONTROLLER_PLATFORM_FIELD);
tmp = strstr(line, SDL_CONTROLLER_PLATFORM_FIELD);
if (tmp != NULL) {
tmp += SDL_CONTROLLER_PLATFORM_FIELD_SIZE;
// comma = SDL_strchr(tmp, ',');
comma = strchr(tmp, ',');
if (comma != NULL) {
//SDL2 platform_len = comma - tmp + 1;
platform_len = comma - tmp;
if (platform_len + 1 < SDL_arraysize(line_platform)) {

// SDL_strlcpy(line_platform, tmp, platform_len);
strncpy(line_platform, tmp, platform_len);
// if (SDL_strncasecmp(line_platform, platform, platform_len) == 0 &&
if (strncasecmp(line_platform, platform, platform_len) == 0 &&
SDL_GameControllerAddMapping(line) > 0) {
controllers++;
}
}
}
}

line = line_end + 1;
}

free(buf);

// check for actual gamecontrollerdb.txt
SDL_GameControllerAddMappingsFromFile("gamecontrollerdb.txt");
controllers =0;

// Open all joysticks as game controllers
for(int n=0; n<SDL_NumJoysticks(); n++) {
if(SDL_GameControllerOpen(n))
controllers++; // open correctly
}

return controllers;
} //mgarcia

#ifdef __cplusplus
} // extern "C" {
#endif

#endif //#ifndef LOAD_GAMECONTROLLERDB

#endif // #ifndef UNIT_32BLIT // SDL2 stuff only

#if 0 //old orig, SDL2 ver

#include "SDL.h"
//mgarcia updated to newer version for controller support

#include "Input.hpp"
#include "engine/input.hpp"
#include "System.hpp"

//amico again
#define SDL_Log //

//mgarcia
//defines private from: https://github.com/libsdl-org/SDL/blob/396411c09093660fead7999827e9f0db5ea2bc0e/src/joystick/SDL_gamecontroller.c#L47
#define SDL_CONTROLLER_PLATFORM_FIELD "platform:"
#define SDL_CONTROLLER_PLATFORM_FIELD_SIZE strlen(SDL_CONTROLLER_PLATFORM_FIELD)
#define SDL_CONTROLLER_HINT_FIELD "hint:"
#define SDL_CONTROLLER_HINT_FIELD_SIZE strlen(SDL_CONTROLLER_HINT_FIELD)

// loads embedded gamecontrollerdb.txt, then trys to load gamecontrollerdb.txt in the current directory, then trys to opens connected controllers
// returns number of opened controllers

extern "C" int load_gamecontrollerdb(const char *db_str, const uint32_t db_size)
{

const char *platform = SDL_GetPlatform();
int controllers = 0;
char *buf, *line, *line_end, *tmp, *comma, line_platform[64];
size_t platform_len;

buf = (char *)SDL_calloc(1, db_size + 1);
if (buf == NULL) {
return SDL_SetError("Could not allocate space to read DB into memory");
}

memcpy(buf, db_str, db_size );

line = buf;

while (line < buf + db_size) {
line_end = SDL_strchr(line, '\n');
if (line_end != NULL) {
*line_end = '\0';
} else {
line_end = buf + db_size;
}

/* Extract and verify the platform */
tmp = SDL_strstr(line, SDL_CONTROLLER_PLATFORM_FIELD);
if (tmp != NULL) {
tmp += SDL_CONTROLLER_PLATFORM_FIELD_SIZE;
comma = SDL_strchr(tmp, ',');
if (comma != NULL) {
platform_len = comma - tmp + 1;
if (platform_len + 1 < SDL_arraysize(line_platform)) {
SDL_strlcpy(line_platform, tmp, platform_len);
if (SDL_strncasecmp(line_platform, platform, platform_len) == 0 &&
SDL_GameControllerAddMapping(line) > 0) {
controllers++;
}
}
}
}

line = line_end + 1;
}

SDL_free(buf);

// check for actual gamecontrollerdb.txt
SDL_GameControllerAddMappingsFromFile("gamecontrollerdb.txt");
controllers =0;

// Open all joysticks as game controllers
for(int n=0; n<SDL_NumJoysticks(); n++) {
if(SDL_GameControllerOpen(n))
controllers++; // open correctly
}

return controllers;
} //mgarcia
#endif