////////////////////////////////
//~ Win32 headers

#pragma warning(push, 0)
#  define UNICODE
#  define WIN32_LEAN_AND_MEAN
#  include <Windows.h>
#  include <WinSock2.h>
#  include <TlHelp32.h>
#  include <WS2tcpip.h>
#  include <windowsx.h>
#  include <ShlObj_core.h>
#  include <fileapi.h>
#  include <dwmapi.h>
#  include <bcrypt.h>
#  include <avrt.h>
#  include <shellapi.h>
#pragma warning(pop)

////////////////////////////////
//~ Window types

typedef i32 P_W32_CursorFlag; enum
{
    P_W32_CursorFlag_None = (0 << 0),
    P_W32_CursorFlag_Position = (1 << 0),
    P_W32_CursorFlag_Hide = (1 << 1),
    P_W32_CursorFlag_Show = (1 << 2),
    P_W32_CursorFlag_EnableClip = (1 << 3),
    P_W32_CursorFlag_DisableClip = (1 << 4)
};

Struct(P_W32_Window)
{
    u32 flags;

    HWND hwnd;
    Counter ready_fence;

    u16 utf16_high_surrogate_last_input;

    Mutex settings_mutex;
    P_WindowSettings settings;

    i32 monitor_width;
    i32 monitor_height;
    /* NOTE: width & height are unaffected by window minimization (they retain
     * their pre-minimized values) */
    i32 x, y, width, height;

    /* FIXME: Use a cmd buffer for updating cursor (and maybe also settings).
     * Current setup means cursor_set calls can be applied out of order */
    u32 cursor_set_flags;
    Vec2 cursor_set_position;
    Rect cursor_clip_bounds;

    Atomic32 topmost_toggles;
    b32 is_topmost;

    Mutex event_arena_swp_mutex;
    i32 current_event_arena_index;
    Arena *event_arenas[2];

    W32_Thread *window_thread;

    Atomic32 shutdown;
    P_W32_Window *next_free;
};

////////////////////////////////
//~ Watch types

Struct(P_W32_Watch)
{
    HANDLE dir_handle;
    HANDLE wake_handle;
    P_W32_Watch *next_free;
    u8 results_buff[Kibi(64)];
};

////////////////////////////////
//~ Address types

Struct(P_W32_Address)
{
    i32 size;
    i32 family;
    union
    {
        struct sockaddr_storage sas;
        struct sockaddr sa;
        struct sockaddr_in sin;
        struct sockaddr_in6 sin6;
    };
};

////////////////////////////////
//~ Sock types

Struct(P_W32_Sock)
{
    SOCKET sock;
    P_W32_Sock *next_free;
};

////////////////////////////////
//~ Shared state

#define P_W32_WindowClassName L"power_play_window_class"

Struct(P_W32_SharedCtx)
{
    //- Key lookup table
    P_Btn vk_btn_table[256];

    //- Watches pool
    Mutex watches_mutex;
    Arena *watches_arena;
    P_W32_Watch *watches_first_free;

    //- Windows pool
    WNDCLASSEXW window_class;
    Mutex windows_mutex;
    Arena *windows_arena;
    P_W32_Window *first_free_window;

    //- Socket pool
    WSADATA wsa_data;
    Arena *socks_arena;
    Mutex socks_mutex;
    P_W32_Sock *first_free_sock;
};

extern P_W32_SharedCtx P_W32_shared_ctx;

////////////////////////////////
//~ Time operations

P_DateTime P_W32_DateTimeFromWin32SystemTime(SYSTEMTIME st);

////////////////////////////////
//~ File system operations

String P_W32_StringFromWin32Path(Arena *arena, wchar_t *src);

////////////////////////////////
//~ Window operations

P_W32_Window *P_W32_AllocWindow(void);
void P_W32_ReleaseWindow(P_W32_Window *window);
HWND P_W32_InitWindow(P_W32_Window *window);

//- Window settings
void P_W32_UpdateWindowFromSystem(P_W32_Window *window);
void P_W32_UpdateWindowFromSettings(P_W32_Window *window, P_WindowSettings *settings);

//- Window thread
W32_ThreadDef(P_W32_WindowThreadEntryFunc, arg);
void P_W32_ProcessWindowEvent(P_W32_Window *window, P_WindowEvent event);
void P_W32_WakeWindow(P_W32_Window *window);
LRESULT CALLBACK P_W32_Win32WindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam);

////////////////////////////////
//~ Address operations

P_W32_Address P_W32_Win32AddressFromPlatformAddress(P_Address addr);
P_W32_Address P_W32_ConvertAnyaddrToLocalhost(P_W32_Address addr);
P_Address P_W32_PlatformAddressFromWin32Address(P_W32_Address ws_addr);