/*
 * Mr. 4th Dimention - Allen Webster
 *
 * 12.12.2014
 *
 * Application Layer for 4coder
 *
 */

// TOP

#ifndef FRED_H
#define FRED_H

#define MAX_VIEWS 16

struct Application_Memory{
    void *vars_memory;
    i32 vars_memory_size;
    void *target_memory;
    i32 target_memory_size;
    void *user_memory;
    i32 user_memory_size;
};

#define KEY_INPUT_BUFFER_SIZE 4
#define KEY_INPUT_BUFFER_DSIZE (KEY_INPUT_BUFFER_SIZE << 1)

struct Key_Input_Data{
	Key_Event_Data press[KEY_INPUT_BUFFER_SIZE];
	Key_Event_Data hold[KEY_INPUT_BUFFER_SIZE];
	i32 press_count;
    i32 hold_count;
    
    char modifiers[MDFR_INDEX_COUNT];
};
static Key_Input_Data null_key_input_data = {0};

struct Key_Summary{
    i32 count;
    Key_Event_Data keys[KEY_INPUT_BUFFER_DSIZE + 2];
};

inline Key_Event_Data
get_single_key(Key_Summary *summary, i32 index){
    Key_Event_Data key;
    key = summary->keys[index];
    return key;
}

typedef struct Input_Summary{
    Mouse_State mouse;
    Key_Summary keys;
    f32 dt;
} Input_Summary;

typedef struct Command_Line_Parameters{
    char **argv;
    int32_t argc;
} Command_Line_Parameters;

typedef struct Plat_Settings{
    char *custom_dll;
    b32 custom_dll_is_strict;
    b32 fullscreen_window;
    b32 stream_mode;
    
    i32 window_w, window_h;
    i32 window_x, window_y;
    b8 set_window_pos;
    b8 set_window_size;
    b8 maximize_window;
    b8 use_hinting;
} Plat_Settings;

#define App_Read_Command_Line_Sig(name)                 \
    i32 name(System_Functions *system,                  \
             Application_Memory *memory,                \
             String current_directory,                  \
             Plat_Settings *plat_settings,              \
             char ***files, i32 **file_count,           \
             Command_Line_Parameters clparams)

typedef App_Read_Command_Line_Sig(App_Read_Command_Line);


#define App_Init_Sig(name) void                                    \
name(System_Functions *system,                                     \
     Render_Target *target,                                        \
     Application_Memory *memory,                                   \
     String clipboard,                                             \
     String current_directory,                                     \
     Custom_API api)

typedef App_Init_Sig(App_Init);


enum Application_Mouse_Cursor{
	APP_MOUSE_CURSOR_DEFAULT,
	APP_MOUSE_CURSOR_ARROW,
	APP_MOUSE_CURSOR_IBEAM,
	APP_MOUSE_CURSOR_LEFTRIGHT,
	APP_MOUSE_CURSOR_UPDOWN,
	// never below this
	APP_MOUSE_CURSOR_COUNT
};

struct Application_Step_Result{
	Application_Mouse_Cursor mouse_cursor_type;
    b32 lctrl_lalt_is_altgr;
    b32 trying_to_kill;
    b32 perform_kill;
    b32 animating;
};

struct Application_Step_Input{
    b32 first_step;
    f32 dt;
    Key_Input_Data keys;
    Mouse_State mouse;
    String clipboard;
};

#define App_Step_Sig(name) void                        \
name(System_Functions *system,                         \
    Render_Target *target,                             \
    Application_Memory *memory,                        \
    Application_Step_Input *input,                     \
    Application_Step_Result *result)

typedef App_Step_Sig(App_Step);


struct App_Functions{
    App_Read_Command_Line *read_command_line;
    App_Init *init;
    App_Step *step;
};

#define App_Get_Functions_Sig(name) App_Functions name()
typedef App_Get_Functions_Sig(App_Get_Functions);

#endif

// BOTTOM