#pragma once

#define WIN32_LEAN_AND_MEAN
#include <windows.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
    UINT    dpi;
    LOGFONT lfMessageFont;
    HFONT   hMessageFont;
} ALFWindowFonts;

typedef struct {
    void (*create)(void * /*closure*/, HWND /*window*/);
    void (*destroy)(void * /*closure*/, HWND /*window*/);
    BOOL (*close)(void * /*closure*/, HWND /*window*/);
    void (*postdestroy)(void * /*closure*/);
    LRESULT (*message)(void * /*closure*/, HWND, UINT, WPARAM, LPARAM);
    LRESULT (*command)(void * /*closure*/, HWND /*window*/, WORD /*notificationcode*/, WORD /*sourceid*/, HWND /*control*/);
    LRESULT (*notify)(void * /*closure*/, HWND /*window*/, WPARAM /*sourceid*/, NMHDR *);
    BOOL (*pretranslatemessage)(void * /*closure*/, HWND /*window*/, MSG * /*message*/);
    void (*paint)(void * /*closure*/, HWND, HDC, RECT *);
    void (*windowposchanged)(void * /*closure*/, HWND, WINDOWPOS *);
} ALFWindowVTable;

typedef struct {
    void (*create)(void * /*closure*/, HWND /*panel*/);
    void (*destroy)(void * /*closure*/, HWND /*panel*/);
    LRESULT (*message)(void * /*closure*/, HWND, UINT, WPARAM, LPARAM);
    void (*paint)(void * /*closure*/, HWND, HDC, RECT * /*rcPaint*/);
} ALFPanelVTable;

// layout flags
#define ALF_LAYOUT_SIZE_FIXED       0x00
#define ALF_LAYOUT_SIZE_QUERY       0x01
#define ALF_LAYOUT_SIZE_PUSHBUTTON  0x04 /* unimplemented */
#define ALF_LAYOUT_SIZE_STATICTEXT  0x05 /* unimplemented */
#define ALF_LAYOUT_SIZE_EDIT        0x06
#define ALF_LAYOUT_SIZE_RADIOBUTTON 0x07 /* unimplemented */
#define ALF_LAYOUT_SIZE_CHECKBOX    0x07 /* unimplemented */
#define ALF_LAYOUT_SIZETYPE_MASK    0x0f
#define ALF_LAYOUT_INHERITFONT      0x10
#define ALF_LAYOUT_CUSTOMPOS        0x20
#define ALF_LAYOUT_SIZE_PX          0x40
#define ALF_LAYOUT_INHERITBGCOLOR   0x80
#define ALF_LAYOUT_TRANSPARENTBG   0x100
#define ALF_LAYOUT_SENDBGCHANGE    0x200


// label style flags
#define ALF_LABEL_ALIGN_LEFT            0
#define ALF_LABEL_ALIGN_LEFT_LIKE_EDIT  1
#define ALF_LABEL_ALIGN_HCENTER         2
#define ALF_LABEL_ALIGN_RIGHT           3
#define ALF_LABEL_HALIGN_MASK           3
#define ALF_LABEL_ALIGN_TOP             0
#define ALF_LABEL_ALIGN_TOP_LIKE_EDIT   4
#define ALF_LABEL_ALIGN_VCENTER         8
#define ALF_LABEL_ALIGN_BOTTOM         12
#define ALF_LABEL_VALIGN_MASK          12

// notebook flags
#define ALF_NOTEBOOK_SOLID_TAB_BACKGROUND   1


// messages
#define ALF_WM__BASE            0x2800
#define ALF_WM_QUERYSIZE        (ALF_WM__BASE + 1)
#define ALF_WM_APPLYLAYOUT      (ALF_WM__BASE + 2)
#define ALF_WM_UPDATEFONTS      (ALF_WM__BASE + 3)
#define ALF_WM_ADDWIDGET        (ALF_WM__BASE + 4)
#define ALF_WM_WIDGETBYID       (ALF_WM__BASE + 5)
#define ALF_WM_REMOVEWIDGET     (ALF_WM__BASE + 6)
#define ALF_WM_SETMODALRESULT   (ALF_WM__BASE + 7)
#define ALF_WM_GETMODALRESULT   (ALF_WM__BASE + 8)
#define ALF_WM_CENTIPOINTTOPX   (ALF_WM__BASE + 9)
#define ALF_WM_SETFOCUS         (ALF_WM__BASE + 10)
#define ALF_WM_BACKGROUNDCHANGE (ALF_WM__BASE + 11)
#define ALF_WM_APPLYSIZE        (ALF_WM__BASE + 12)
#define ALF_WM_SETBGCOLOR       (ALF_WM__BASE + 13)
#define ALF_WM_GETBGCOLOR       (ALF_WM__BASE + 14)
#define ALF_WM_GETWIDGETATPOS   (ALF_WM__BASE + 15)
#define ALF_WM_PRETRANSLATEMSG  (ALF_WM__BASE + 16)
#define ALF_WM_INVALIDATELAYOUT (ALF_WM__BASE + 17)
#define ALF_WM_VALIDATELAYOUT   (ALF_WM__BASE + 18)
#define ALF_WM_LYT_GETWIDGETPOS (ALF_WM__BASE + 19)
#define ALF_WM_LYT_SETWIDGETPOS (ALF_WM__BASE + 20)
#define ALF_WM_LYT_GETWIDGTSIZE (ALF_WM__BASE + 21)
#define ALF_WM_LYT_SETWIDGTSIZE (ALF_WM__BASE + 22)
#define ALF_WM_LYT_GETWDGTFLAGS (ALF_WM__BASE + 23)
#define ALF_WM_LYT_SETWDGTFLAGS (ALF_WM__BASE + 24)
#define ALF_WM_LYT_GETCOLSIZE   (ALF_WM__BASE + 25)
#define ALF_WM_LYT_SETCOLSIZE   (ALF_WM__BASE + 26)
#define ALF_WM_LYT_GETCOLEXPAND (ALF_WM__BASE + 27)
#define ALF_WM_LYT_SETCOLEXPAND (ALF_WM__BASE + 28)
#define ALF_WM_LYT_GETCOLFLAGS  (ALF_WM__BASE + 29)
#define ALF_WM_LYT_SETCOLFLAGS  (ALF_WM__BASE + 30)
#define ALF_WM_LYT_GETROWSIZE   (ALF_WM__BASE + 31)
#define ALF_WM_LYT_SETROWSIZE   (ALF_WM__BASE + 32)
#define ALF_WM_LYT_GETROWEXPAND (ALF_WM__BASE + 33)
#define ALF_WM_LYT_SETROWEXPAND (ALF_WM__BASE + 34)
#define ALF_WM_LYT_GETROWFLAGS  (ALF_WM__BASE + 35)
#define ALF_WM_LYT_SETROWFLAGS  (ALF_WM__BASE + 36)

#define ALF_WM_LBL_GETSTYLE     (ALF_WM__BASE + 201)
#define ALF_WM_LBL_SETSTYLE     (ALF_WM__BASE + 202)

#define ALF_WM_PANEL_SETVTABLE  (ALF_WM__BASE + 201)

#define ALF_WM_NTBK_GETFLAGS    (ALF_WM__BASE + 201)
#define ALF_WM_NTBK_SETFLAGS    (ALF_WM__BASE + 202)

typedef DWORD ALFColor;

#define ALF_COLOR_TRANSPARENT  ((ALFColor)-1)
#define ALF_COLOR_RGB(r, g, b) ((ALFColor)(((DWORD)(BYTE)r) | (((DWORD)(BYTE)g) << 8) | (((DWORD)(BYTE)b) << 16)))
#define ALF_COLOR_SYS(i)       ((ALFColor)(0x80000000 | (((DWORD)(BYTE)i) << 24)))

typedef struct {
    const TCHAR    *className;
    UINT            classStyle;
    ALFWindowVTable vtbl;
} ALFWindowClassParams;

typedef enum {
    ALF_DPI_AWARENESS_UNAWARE,
    ALF_DPI_AWARENESS_SYSTEM_AWARE,
    ALF_DPI_AWARENESS_PER_MONITOR_AWARE_V2
} ALFDpiAwareness;

void
ALF_SetDpiAwareness(ALFDpiAwareness awareness);

void
ALF_Initialize(void);

void
ALF_UnInitialize(void);

void *
ALF_Alloc(SIZE_T nmemb, SIZE_T size);

void *
ALF_ReAlloc(void *ptr, SIZE_T nmemb, SIZE_T size);

#define ALF_New(type, count) ((type *)ALF_Alloc((count), sizeof(type)))
#define ALF_ReNew(ptr, type, count) ((type *)ALF_ReAlloc(ptr, (count), sizeof(type)))

void
ALF_Free(const void *p);

COLORREF
ALF_ColorToGdi(ALFColor color);

LPTSTR
ALF_RegisterWindowClass(HINSTANCE instance, const ALFWindowClassParams *params);

void
ALF_UnregisterWindowClass(HINSTANCE instance, LPCTSTR className);

HWND
ALF_InstantiateWindow(HINSTANCE instance, LPCTSTR className, HWND hwndParent, void *closure);

void
ALF_DestroyWindow(HWND win);

BOOL
ALF_PreTranslateMessage(HWND hwnd, MSG *message);

int
ALF_CentipointsToPixels(HWND win, int cptValue);

LRESULT
ALF_DefWindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam);

HWND
ALF_AddLabel(HWND win, WORD id, int x, int y, const TCHAR *text);

HWND
ALF_AddEdit(HWND win, WORD id, int x, int y, const TCHAR *text);

HWND
ALF_AddButton(HWND win, WORD id, int x, int y, const TCHAR *text);

void
ALF_SetDefaultButton(HWND win, WORD id);

void
ALF_DestroyWidget(HWND win, WORD id);

void
ALF_AddWidget(HWND win, int x, int y, HWND widget, int width, int height, DWORD flags);

HWND
ALF_WidgetHwndById(HWND win, WORD id);

void
ALF_InvalidateLayout(HWND win);

// Sends ALF_WM_BACKGROUNDCHANGE to notify the window of a changed background
// Only useful when you have overridden the window or panel pain() vfunc
// when you use solid background colors, ALF will handle this automatically
void
ALF_InvalidateBackground(HWND win);

// Recalculates the window's DPI and all fonts and applies them to child widgets.
// ALF does this automatically on a DPI or settings change so you shouldn't have
// to call ALF_UpdateFonts().
void
ALF_UpdateFonts(HWND win);

// Sets the background color of the given window
// Also, if the window is a child window, disables the ALF_LAYOUT_INHERITBGCOLOR flag
// Only the following widgets have background colors:
// - Top-Level window
// - Panel
// - Label
// TODO: button, ...
void
ALF_SetBackgroundColor(HWND win, ALFColor color);

ALFColor
ALF_BackgroundColor(HWND win);

void
ALF_ResizeWindow(HWND win, int cptWidth, int cptHeight);

void
ALF_ResizeWindowPx(HWND win, int pxWidth, int pxHeight);

int
ALF_ShowModal(HWND win);

void
ALF_SetModalResult(HWND win, int result);

int
ALF_GetModalResult(HWND win);

void
ALF_SetText(HWND hwnd, const TCHAR *text);

void
ALF_SetWidgetText(HWND parent, WORD id, const TCHAR *text);

TCHAR * // free with ALF_Free
ALF_Text(HWND hwnd);

TCHAR * // free with ALF_Free
ALF_WidgetText(HWND parent, WORD id);

DWORD
ALF_WidgetLayoutFlags(HWND parent, HWND widget);

BOOL
ALF_SetWidgetLayoutFlags(HWND parent, HWND widget, DWORD flags);

static inline void
ALF_AddWidgetLayoutFlag(HWND parent, HWND widget, DWORD flag)
{
    ALF_SetWidgetLayoutFlags(parent, widget, ALF_WidgetLayoutFlags(parent, widget) | flag);
}

static inline void
ALF_RemoveWidgetLayoutFlag(HWND parent, HWND widget, DWORD flag)
{
    ALF_SetWidgetLayoutFlags(parent, widget, ALF_WidgetLayoutFlags(parent, widget) & ~flag);
}

BOOL
ALF_WidgetLayoutPosition(HWND parent, HWND widget, int *pX, int *pY);

BOOL
ALF_SetWidgetLayoutPosition(HWND parent, HWND widget, int x, int y);

BOOL
ALF_WidgetLayoutMinSize(HWND parent, HWND widget, int *pWidth, int *pheight);

BOOL
ALF_SetWidgetLayoutMinSize(HWND parent, HWND widget, int width, int height);

HWND
ALF_WidgetAtLayoutPosition(HWND parent, int x, int y);

int
ALF_LayoutRowMinSize(HWND parent, int rowno);

BOOL
ALF_LayoutSetRowMinSize(HWND parent, int rowno, int rowsize);

int
ALF_LayoutColumnMinSize(HWND parent, int colno);

BOOL
ALF_LayoutSetColumnMinSize(HWND parent, int colno, int colsize);

DWORD
ALF_LayoutRowFlags(HWND parent, int rowno);

BOOL
ALF_LayoutSetRowFlags(HWND parent, int rowno, DWORD flags);

DWORD
ALF_LayoutColumnFlags(HWND parent, int colno);

BOOL
ALF_LayoutSetColumnFlags(HWND parent, int colno, DWORD flags);

int
ALF_LayoutRowExpandNumerator(HWND parent, int rowno);

BOOL
ALF_LayoutSetRowExpandNumerator(HWND parent, int rowno, int expand);

int
ALF_LayoutColumnExpandNumerator(HWND parent, int colno);

BOOL
ALF_LayoutSetColumnExpandNumerator(HWND parent, int colno, int expand);

// combo box

HWND
ALF_AddEditableComboBox(HWND win, WORD id, int x, int y, const TCHAR *defaultText);

HWND
ALF_AddSelectionOnlyComboBox(HWND win, WORD id, int x, int y);

int /* index */
ALF_ComboBoxAddString(HWND combo, const TCHAR *text);

void
ALF_ComboBoxInsertString(HWND combo, int index, const TCHAR *text);

void
ALF_ComboBoxRemoveString(HWND combo, int index);

TCHAR * // free with ALF_Free
ALF_ComboBoxStringForIndex(HWND combo, int index);

int
ALF_ComboBoxCurrentIndex(HWND combo);

void
ALF_ComboBoxSetCurrentIndex(HWND combo, int index);

TCHAR * // free with ALF_Free
ALF_ComboBoxCurrentText(HWND combo);

void
ALF_ComboBoxSetText(HWND combo, const TCHAR *text);

// panel
HWND
ALF_AddPanel(HWND parent, WORD id, int x, int y);

void
ALF_Panel_SetVTable(HWND panel, const ALFPanelVTable *vtbl, void *closure);

LRESULT
ALF_Panel_DefWindowProc(HWND panel, UINT msg, WPARAM wparam, LPARAM lparam);

// tab control
HWND
ALF_AddNotebook(HWND parent, WORD id, int x, int y);

HWND
ALF_NotebookAddTab(HWND notebook, const TCHAR *title);

int
ALF_NotebookTabCount(HWND notebook);

int
ALF_NotebookTabIndex(HWND notebook, HWND tabPanel);

int
ALF_NotebookSelectedIndex(HWND notebook);

HWND
ALF_NotebookSelectedPanel(HWND notebook);

HWND
ALF_NotebookTabPanel(HWND notebook, int index);

DWORD
ALF_NotebookFlags(HWND notebook);

void
ALF_NotebookSetFlags(HWND notebook, DWORD flags);

static inline void
ALF_NotebookAddFlag(HWND notebook, DWORD flag) {
    ALF_NotebookSetFlags(notebook, ALF_NotebookFlags(notebook) | flag);
}

static inline void
ALF_NotebookRemoveFlag(HWND notebook, DWORD flag) {
    ALF_NotebookSetFlags(notebook, ALF_NotebookFlags(notebook) & ~flag);
}

#ifdef __cplusplus
} // extern C
#endif