/*===============================================================================================
// Platform API Struct
===============================================================================================*/

// General API for platform
typedef struct gs_platform_i
{
    /*============================================================
    // Platform Initilization / De-Initialization
    ============================================================*/
    gs_result ( * gs_platform_init )();
    gs_result ( * gs_platform_shutdown )();

    /*============================================================
    // Platform Util
    ============================================================*/
    u32     ( * gs_platform_ticks )();
    void    ( * gs_platform_delay )( u32 ticks );

    /*============================================================
    // Platform UUID
    ============================================================*/
    struct gs_uuid  ( * gs_platform_generate_uuid )();
    void            ( * gs_uuid_to_string )( char* temp_buffer, const struct gs_uuid* uuid ); // Expects a temp buffer with at leat 32 bytes
    u32             ( * gs_hash_uuid )( const struct gs_uuid* uuid );

    /*============================================================
    // Platform Input
    ============================================================*/
    struct gs_platform_input* ( * gs_platform_create_input )();
    gs_result ( * gs_platform_process_input )( struct gs_platform_input* input );

    b32 ( * gs_platform_key_pressed )( struct gs_platform_input* input, gs_platform_keycode code );
    b32 ( * gs_platform_key_down )( struct gs_platform_input* input, gs_platform_keycode code );
    b32 ( * gs_platform_key_released )( struct gs_platform_input* input, gs_platform_keycode code );

    b32 ( * gs_platform_mouse_pressed )( struct gs_platform_input* input, gs_mouse_button_code code );
    b32 ( * gs_platform_mouse_down )( struct gs_platform_input* input, gs_mouse_button_code code );
    b32 ( * gs_platform_mouse_released )( struct gs_platform_input* input, gs_mouse_button_code code );

    gs_vec2 ( * gs_platform_mouse_delta )( struct gs_platform_input* input );
    gs_vec2 ( * gs_platform_mouse_position )( struct gs_platform_input* input );
    void ( * gs_platform_mouse_position_f32 )( struct gs_platform_input* input, f32* x, f32* y );
    void ( * gs_platform_mouse_wheel )( struct gs_platform_input* input, f32* x, f32* y );

    void ( * gs_platform_press_key )( struct gs_platform_input* input, gs_platform_keycode code );
    void ( * gs_platform_release_key )( struct gs_platform_input* input, gs_platform_keycode code );

    /*============================================================
    // Platform Window
    ============================================================*/
    struct gs_platform_window*  ( * gs_platform_create_window )( const char* title, u32 width, u32 height );
    void                        ( * gs_platform_window_swap_buffer )( struct gs_platform_window* win );
    gs_vec2                     ( * gs_platform_window_size )( struct gs_platform_window* win );
    void                        ( * gs_platform_window_width_height )( struct gs_platform_window* win, s32* width, s32* height );
    void                        ( * gs_platform_set_cursor )( struct gs_platform_window* win, gs_platform_cursor cursor );

    /*============================================================
    // Platform File IO
    ============================================================*/

    // Will return a null buffer if file does not exist or allocation fails
    char*       gs_read_file_contents_into_string_null_term (const char* file_path, const char* mode, usize* sz );
    gs_result   gs_write_str_to_file (const char* contents, const char* mode, usize sz, const char* output_path );

} gs_platform_i;