/************************************************************/ /**
*
*	@file: platform_app.h
*	@author: Martin Fouilleul
*	@date: 16/05/2020
*	@revision:
*
*****************************************************************/
#ifndef __APP_H_
#define __APP_H_

#include "util/lists.h"
#include "util/memory.h"
#include "util/typedefs.h"
#include "util/utf8.h"

#ifdef __cplusplus
extern "C" {
#endif

//--------------------------------------------------------------------
// Typedefs, enums and constants
//--------------------------------------------------------------------

typedef struct oc_window
{
    u64 h;
} oc_window;

typedef enum
{
    OC_MOUSE_CURSOR_ARROW,
    OC_MOUSE_CURSOR_RESIZE_0,
    OC_MOUSE_CURSOR_RESIZE_90,
    OC_MOUSE_CURSOR_RESIZE_45,
    OC_MOUSE_CURSOR_RESIZE_135,
    OC_MOUSE_CURSOR_TEXT
} oc_mouse_cursor;

typedef i32 oc_window_style;
static const oc_window_style OC_WINDOW_STYLE_NO_TITLE = 0x01 << 0,
                             OC_WINDOW_STYLE_FIXED_SIZE = 0x01 << 1,
                             OC_WINDOW_STYLE_NO_CLOSE = 0x01 << 2,
                             OC_WINDOW_STYLE_NO_MINIFY = 0x01 << 3,
                             OC_WINDOW_STYLE_NO_FOCUS = 0x01 << 4,
                             OC_WINDOW_STYLE_FLOAT = 0x01 << 5,
                             OC_WINDOW_STYLE_POPUPMENU = 0x01 << 6,
                             OC_WINDOW_STYLE_NO_BUTTONS = 0x01 << 7;

typedef enum
{
    OC_EVENT_NONE,
    OC_EVENT_KEYBOARD_MODS, //TODO: remove, keep only key?
    OC_EVENT_KEYBOARD_KEY,
    OC_EVENT_KEYBOARD_CHAR,
    OC_EVENT_MOUSE_BUTTON,
    OC_EVENT_MOUSE_MOVE,
    OC_EVENT_MOUSE_WHEEL,
    OC_EVENT_MOUSE_ENTER,
    OC_EVENT_MOUSE_LEAVE,
    OC_EVENT_WINDOW_RESIZE,
    OC_EVENT_WINDOW_MOVE,
    OC_EVENT_WINDOW_FOCUS,
    OC_EVENT_WINDOW_UNFOCUS,
    OC_EVENT_WINDOW_HIDE, // rename to minimize?
    OC_EVENT_WINDOW_SHOW, // rename to restore?
    OC_EVENT_WINDOW_CLOSE,
    OC_EVENT_PATHDROP,
    OC_EVENT_FRAME,
    OC_EVENT_QUIT
} oc_event_type;

typedef enum
{
    OC_KEY_NO_ACTION,
    OC_KEY_PRESS,
    OC_KEY_RELEASE,
    OC_KEY_REPEAT
} oc_key_action;

typedef enum
{
    OC_KEY_UNKNOWN = 0,
    OC_KEY_SPACE = 32,
    OC_KEY_APOSTROPHE = 39, /* ' */
    OC_KEY_COMMA = 44,      /* , */
    OC_KEY_MINUS = 45,      // -
    OC_KEY_PERIOD = 46,     // .
    OC_KEY_SLASH = 47,      // /
    OC_KEY_0 = 48,
    OC_KEY_1 = 49,
    OC_KEY_2 = 50,
    OC_KEY_3 = 51,
    OC_KEY_4 = 52,
    OC_KEY_5 = 53,
    OC_KEY_6 = 54,
    OC_KEY_7 = 55,
    OC_KEY_8 = 56,
    OC_KEY_9 = 57,
    OC_KEY_SEMICOLON = 59, // ;
    OC_KEY_EQUAL = 61,     // =
    OC_KEY_A = 65,
    OC_KEY_B = 66,
    OC_KEY_C = 67,
    OC_KEY_D = 68,
    OC_KEY_E = 69,
    OC_KEY_F = 70,
    OC_KEY_G = 71,
    OC_KEY_H = 72,
    OC_KEY_I = 73,
    OC_KEY_J = 74,
    OC_KEY_K = 75,
    OC_KEY_L = 76,
    OC_KEY_M = 77,
    OC_KEY_N = 78,
    OC_KEY_O = 79,
    OC_KEY_P = 80,
    OC_KEY_Q = 81,
    OC_KEY_R = 82,
    OC_KEY_S = 83,
    OC_KEY_T = 84,
    OC_KEY_U = 85,
    OC_KEY_V = 86,
    OC_KEY_W = 87,
    OC_KEY_X = 88,
    OC_KEY_Y = 89,
    OC_KEY_Z = 90,
    OC_KEY_LEFT_BRACKET = 91,  // [
    OC_KEY_BACKSLASH = 92,     // \ */
    OC_KEY_RIGHT_BRACKET = 93, // ]
    OC_KEY_GRAVE_ACCENT = 96,  // `
    OC_KEY_WORLD_1 = 161,      // non-US #1
    OC_KEY_WORLD_2 = 162,      // non-US #2
    OC_KEY_ESCAPE = 256,
    OC_KEY_ENTER = 257,
    OC_KEY_TAB = 258,
    OC_KEY_BACKSPACE = 259,
    OC_KEY_INSERT = 260,
    OC_KEY_DELETE = 261,
    OC_KEY_RIGHT = 262,
    OC_KEY_LEFT = 263,
    OC_KEY_DOWN = 264,
    OC_KEY_UP = 265,
    OC_KEY_PAGE_UP = 266,
    OC_KEY_PAGE_DOWN = 267,
    OC_KEY_HOME = 268,
    OC_KEY_END = 269,
    OC_KEY_CAPS_LOCK = 280,
    OC_KEY_SCROLL_LOCK = 281,
    OC_KEY_NUM_LOCK = 282,
    OC_KEY_PRINT_SCREEN = 283,
    OC_KEY_PAUSE = 284,
    OC_KEY_F1 = 290,
    OC_KEY_F2 = 291,
    OC_KEY_F3 = 292,
    OC_KEY_F4 = 293,
    OC_KEY_F5 = 294,
    OC_KEY_F6 = 295,
    OC_KEY_F7 = 296,
    OC_KEY_F8 = 297,
    OC_KEY_F9 = 298,
    OC_KEY_F10 = 299,
    OC_KEY_F11 = 300,
    OC_KEY_F12 = 301,
    OC_KEY_F13 = 302,
    OC_KEY_F14 = 303,
    OC_KEY_F15 = 304,
    OC_KEY_F16 = 305,
    OC_KEY_F17 = 306,
    OC_KEY_F18 = 307,
    OC_KEY_F19 = 308,
    OC_KEY_F20 = 309,
    OC_KEY_F21 = 310,
    OC_KEY_F22 = 311,
    OC_KEY_F23 = 312,
    OC_KEY_F24 = 313,
    OC_KEY_F25 = 314,
    OC_KEY_KP_0 = 320,
    OC_KEY_KP_1 = 321,
    OC_KEY_KP_2 = 322,
    OC_KEY_KP_3 = 323,
    OC_KEY_KP_4 = 324,
    OC_KEY_KP_5 = 325,
    OC_KEY_KP_6 = 326,
    OC_KEY_KP_7 = 327,
    OC_KEY_KP_8 = 328,
    OC_KEY_KP_9 = 329,
    OC_KEY_KP_DECIMAL = 330,
    OC_KEY_KP_DIVIDE = 331,
    OC_KEY_KP_MULTIPLY = 332,
    OC_KEY_KP_SUBTRACT = 333,
    OC_KEY_KP_ADD = 334,
    OC_KEY_KP_ENTER = 335,
    OC_KEY_KP_EQUAL = 336,
    OC_KEY_LEFT_SHIFT = 340,
    OC_KEY_LEFT_CONTROL = 341,
    OC_KEY_LEFT_ALT = 342,
    OC_KEY_LEFT_SUPER = 343,
    OC_KEY_RIGHT_SHIFT = 344,
    OC_KEY_RIGHT_CONTROL = 345,
    OC_KEY_RIGHT_ALT = 346,
    OC_KEY_RIGHT_SUPER = 347,
    OC_KEY_MENU = 348,
    OC_KEY_COUNT
} oc_key_code;

typedef enum
{
    OC_KEYMOD_NONE = 0x00,
    OC_KEYMOD_ALT = 0x01,
    OC_KEYMOD_SHIFT = 0x02,
    OC_KEYMOD_CTRL = 0x04,
    OC_KEYMOD_CMD = 0x08,
    OC_KEYMOD_MAIN_MODIFIER = 0x10 /* CMD on Mac, CTRL on Win32 */
} oc_keymod_flags;

typedef enum
{
    OC_MOUSE_LEFT = 0x00,
    OC_MOUSE_RIGHT = 0x01,
    OC_MOUSE_MIDDLE = 0x02,
    OC_MOUSE_EXT1 = 0x03,
    OC_MOUSE_EXT2 = 0x04,
    OC_MOUSE_BUTTON_COUNT
} oc_mouse_button;

typedef struct oc_key_event // keyboard and mouse buttons input
{
    oc_key_action action;
    i32 code;
    oc_keymod_flags mods;
    char label[8];
    u8 labelLen;
    int clickCount;
} oc_key_event;

typedef struct oc_char_event // character input
{
    oc_utf32 codepoint;
    char sequence[8];
    u8 seqLen;
} oc_char_event;

typedef struct oc_mouse_event // mouse move/scroll
{
    f32 x;
    f32 y;
    f32 deltaX;
    f32 deltaY;
    oc_keymod_flags mods;
} oc_mouse_event;

typedef struct oc_move_event // window resize / move
{
    oc_rect frame;
    oc_rect content;
} oc_move_event;

typedef struct oc_event
{
    //TODO clipboard and path drop
    oc_window window;
    oc_event_type type;

    union
    {
        oc_key_event key;
        oc_char_event character;
        oc_mouse_event mouse;
        oc_move_event move;
        oc_str8_list paths;
    };

} oc_event;

//NOTE: these APIs are not directly available to Orca apps
#if !defined(OC_PLATFORM_ORCA) || !(OC_PLATFORM_ORCA)
//--------------------------------------------------------------------
// app management
//--------------------------------------------------------------------

ORCA_API void oc_init(void);
ORCA_API void oc_terminate(void);

ORCA_API bool oc_should_quit(void);
ORCA_API void oc_cancel_quit(void);
ORCA_API void oc_request_quit(void);

ORCA_API void oc_set_cursor(oc_mouse_cursor cursor);

//--------------------------------------------------------------------
// Main loop and events handling
//--------------------------------------------------------------------
/*NOTE:
	oc_pump_events() pumps system events into the event queue. A timeout of 0 polls for events,
	while a timeout of -1 blocks for events. A timeout > 0 blocks until new events are available
	or the timeout elapses.

	oc_next_event() get the next event from the event queue, allocating from the passed arena
*/
ORCA_API void oc_pump_events(f64 timeout);
ORCA_API oc_event* oc_next_event(oc_arena* arena);

typedef void (*oc_live_resize_callback)(oc_event event, void* data);
ORCA_API void oc_set_live_resize_callback(oc_live_resize_callback callback, void* data);

//--------------------------------------------------------------------
// window management
//--------------------------------------------------------------------

ORCA_API bool oc_window_handle_is_null(oc_window window);
ORCA_API oc_window oc_window_null_handle(void);

ORCA_API oc_window oc_window_create(oc_rect contentRect, oc_str8 title, oc_window_style style);
ORCA_API void oc_window_destroy(oc_window window);
ORCA_API void* oc_window_native_pointer(oc_window window);

ORCA_API bool oc_window_should_close(oc_window window);
ORCA_API void oc_window_request_close(oc_window window);
ORCA_API void oc_window_cancel_close(oc_window window);

ORCA_API bool oc_window_is_hidden(oc_window window);
ORCA_API void oc_window_hide(oc_window window);
ORCA_API void oc_window_show(oc_window window);

ORCA_API void oc_window_set_title(oc_window window, oc_str8 title);

ORCA_API bool oc_window_is_minimized(oc_window window);
ORCA_API bool oc_window_is_maximized(oc_window window);
ORCA_API void oc_window_minimize(oc_window window);
ORCA_API void oc_window_maximize(oc_window window);
ORCA_API void oc_window_restore(oc_window window);

ORCA_API bool oc_window_has_focus(oc_window window);
ORCA_API void oc_window_focus(oc_window window);
ORCA_API void oc_window_unfocus(oc_window window);

ORCA_API void oc_window_send_to_back(oc_window window);
ORCA_API void oc_window_bring_to_front(oc_window window);

ORCA_API oc_rect oc_window_get_frame_rect(oc_window window);
ORCA_API void oc_window_set_frame_rect(oc_window window, oc_rect rect);
ORCA_API void oc_window_set_frame_position(oc_window window, oc_vec2 position);
ORCA_API void oc_window_set_frame_size(oc_window window, oc_vec2 size);

ORCA_API oc_rect oc_window_get_content_rect(oc_window window);
ORCA_API void oc_window_set_content_rect(oc_window window, oc_rect rect);
ORCA_API void oc_window_set_content_position(oc_window window, oc_vec2 position);
ORCA_API void oc_window_set_content_size(oc_window window, oc_vec2 size);

ORCA_API void oc_window_center(oc_window window);

ORCA_API oc_rect oc_window_content_rect_for_frame_rect(oc_rect frameRect, oc_window_style style);
ORCA_API oc_rect oc_window_frame_rect_for_content_rect(oc_rect contentRect, oc_window_style style);

//---------------------------------------------------------------
// Dispatching stuff to the main thread
//---------------------------------------------------------------

typedef i32 (*oc_dispatch_proc)(void* user);

ORCA_API i32 oc_dispatch_on_main_thread_sync(oc_window main_window, oc_dispatch_proc proc, void* user);

//--------------------------------------------------------------------
// Clipboard
//--------------------------------------------------------------------
ORCA_API void oc_clipboard_clear(void);

ORCA_API void oc_clipboard_set_string(oc_str8 string);
ORCA_API oc_str8 oc_clipboard_get_string(oc_arena* arena);
ORCA_API oc_str8 oc_clipboard_copy_string(oc_str8 backing);

ORCA_API bool oc_clipboard_has_tag(const char* tag);
ORCA_API void oc_clipboard_set_data_for_tag(const char* tag, oc_str8 data);
ORCA_API oc_str8 oc_clipboard_get_data_for_tag(oc_arena* arena, const char* tag);

//--------------------------------------------------------------------
// native open/save/alert windows
//--------------------------------------------------------------------

ORCA_API oc_str8 oc_open_dialog(oc_arena* arena,
                                oc_str8 title,
                                oc_str8 defaultPath,
                                oc_str8_list filters,
                                bool directory);

ORCA_API oc_str8 oc_save_dialog(oc_arena* arena,
                                oc_str8 title,
                                oc_str8 defaultPath,
                                oc_str8_list filters);

ORCA_API int oc_alert_popup(oc_str8 title,
                            oc_str8 message,
                            oc_str8_list options);

//--------------------------------------------------------------------
// file system stuff... //TODO: move elsewhere
//--------------------------------------------------------------------
ORCA_API int oc_file_move(oc_str8 from, oc_str8 to);
ORCA_API int oc_file_remove(oc_str8 path);

ORCA_API int oc_directory_create(oc_str8 path);

#else

void ORCA_IMPORT(oc_request_quit)(void);

void ORCA_IMPORT(oc_runtime_window_set_title)(oc_str8 title);

void ORCA_IMPORT(oc_runtime_window_set_size)(oc_vec2 size);

#endif // !defined(OC_PLATFORM_ORCA) || !(OC_PLATFORM_ORCA)

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

#endif //__APP_H_