package main

import "golang.org/x/sys/windows"

// ── Win32 메시지 상수 ────────────────────────────────────────

const (
	wmDestroy        uint32 = 0x0002
	wmClose          uint32 = 0x0010
	wmSetFont        uint32 = 0x0030
	wmSetText        uint32 = 0x000C
	wmCtlColorStatic uint32 = 0x0138
	wmAppDone        uint32 = 0x8001 // 다운로드 완료 시 사용하는 커스텀 메시지
)

// ── 윈도우 스타일 상수 ───────────────────────────────────────

const (
	wsPopup   uintptr = 0x80000000
	wsCaption uintptr = 0x00C00000
	wsSysMenu uintptr = 0x00080000
	wsChild   uintptr = 0x40000000
	wsVisible uintptr = 0x10000000
	ssCenter  uintptr = 0x00000001
)

// ── 프로그레스바 상수 ────────────────────────────────────────

const (
	pbsSmooth      uintptr = 0x01
	pbmSetRange32  uint32  = 0x0406
	pbmSetPos      uint32  = 0x0402
	pbmSetBarColor uint32  = 0x0409
	pbmSetBkColor  uint32  = 0x2001
)

// ── 기타 Win32 상수 ──────────────────────────────────────────

const (
	setBkModeTransparent = 1

	swShow     = 5
	smCxScreen = 0
	smCyScreen = 1

	mbOK    uintptr = 0x00000000
	mbInfo  uintptr = 0x00000040
	mbError uintptr = 0x00000010
	mbYesNo uintptr = 0x00000004
	mbQ     uintptr = 0x00000020
	idYes           = 6

	iccProgressClass uint32 = 0x00000020
)

// ── 색상 ─────────────────────────────────────────────────────

// rgb COLORREF(0x00BBGGRR) 값을 생성한다.
func rgb(r, g, b uint8) uintptr {
	return uintptr(r) | (uintptr(g) << 8) | (uintptr(b) << 16)
}

// 웹사이트 색상과 동일한 팔레트
var (
	colorBg         = rgb(46, 44, 47)    // #2E2C2F
	colorText       = rgb(200, 200, 200) // 밝은 회색
	colorAccent     = rgb(186, 205, 176) // #BACDB0
	colorProgressBg = rgb(65, 63, 67)   // bg보다 약간 밝은 색
)

// ── DLL 및 프로시저 ──────────────────────────────────────────

var (
	user32   = windows.NewLazySystemDLL("user32.dll")
	kernel32 = windows.NewLazySystemDLL("kernel32.dll")
	gdi32    = windows.NewLazySystemDLL("gdi32.dll")
	comctl32 = windows.NewLazySystemDLL("comctl32.dll")
	uxtheme  = windows.NewLazySystemDLL("uxtheme.dll")
)

// user32.dll
var (
	messageBoxWProc                   = user32.NewProc("MessageBoxW")
	registerClassExWProc              = user32.NewProc("RegisterClassExW")
	createWindowExWProc               = user32.NewProc("CreateWindowExW")
	showWindowProc                    = user32.NewProc("ShowWindow")
	updateWindowProc                  = user32.NewProc("UpdateWindow")
	getMessageWProc                   = user32.NewProc("GetMessageW")
	translateMsgProc                  = user32.NewProc("TranslateMessage")
	dispatchMsgWProc                  = user32.NewProc("DispatchMessageW")
	sendMessageWProc                  = user32.NewProc("SendMessageW")
	postMessageWProc                  = user32.NewProc("PostMessageW")
	defWindowProcWProc                = user32.NewProc("DefWindowProcW")
	destroyWindowProc                 = user32.NewProc("DestroyWindow")
	postQuitMsgProc                   = user32.NewProc("PostQuitMessage")
	getSystemMetricsProc              = user32.NewProc("GetSystemMetrics")
	getDpiForSystemProc               = user32.NewProc("GetDpiForSystem")
	setProcessDpiAwarenessContextProc = user32.NewProc("SetProcessDpiAwarenessContext")
	findWindowWProc                   = user32.NewProc("FindWindowW")
	setForegroundWindowProc           = user32.NewProc("SetForegroundWindow")
)

// kernel32.dll
var (
	createMutexWProc     = kernel32.NewProc("CreateMutexW")
	getModuleHandleWProc = kernel32.NewProc("GetModuleHandleW")
)

// gdi32.dll
var (
	createFontIndirectWProc = gdi32.NewProc("CreateFontIndirectW")
	createSolidBrushProc    = gdi32.NewProc("CreateSolidBrush")
	setTextColorProc        = gdi32.NewProc("SetTextColor")
	setBkModeProc           = gdi32.NewProc("SetBkMode")
	deleteObjectProc        = gdi32.NewProc("DeleteObject")
)

// comctl32.dll / uxtheme.dll
var (
	initCommonControlsExProc = comctl32.NewProc("InitCommonControlsEx")
	setWindowThemeProc       = uxtheme.NewProc("SetWindowTheme")
)

// ── Win32 구조체 ─────────────────────────────────────────────

type wndClassExW struct {
	cbSize        uint32
	style         uint32
	lpfnWndProc   uintptr
	cbClsExtra    int32
	cbWndExtra    int32
	hInstance     uintptr
	hIcon         uintptr
	hCursor       uintptr
	hbrBackground uintptr
	lpszMenuName  *uint16
	lpszClassName *uint16
	hIconSm       uintptr
}

type msgW struct {
	hwnd    uintptr
	message uint32
	wParam  uintptr
	lParam  uintptr
	time    uint32
	ptX     int32
	ptY     int32
}

type initCommonControlsExS struct {
	dwSize uint32
	dwICC  uint32
}

type logFontW struct {
	lfHeight         int32
	lfWidth          int32
	lfEscapement     int32
	lfOrientation    int32
	lfWeight         int32
	lfItalic         byte
	lfUnderline      byte
	lfStrikeOut      byte
	lfCharSet        byte
	lfOutPrecision   byte
	lfClipPrecision  byte
	lfQuality        byte
	lfPitchAndFamily byte
	lfFaceName       [32]uint16
}