//HEADER_GOES_HERE

#include "../types.h"

_SNETVERSIONDATA fileinfo;
int gbActive; // weak
char diablo_exe_path[260];
void *unused_mpq;
char patch_rt_mpq_path[260];
WNDPROC CurrentProc;
void *diabdat_mpq;
char diabdat_mpq_path[260];
void *patch_rt_mpq;
int killed_mom_parent; // weak
BOOLEAN screensaver_enabled_prev;

/* data */

char gszVersionNumber[260] = "internal version unknown";
char gszProductName[260] = "Diablo v1.09";

void __fastcall init_cleanup(BOOL show_cursor)
{
	pfile_flush_W();
	init_disable_screensaver(0);
	init_run_office_from_start_menu();

	if (diabdat_mpq) {
		SFileCloseArchive(diabdat_mpq);
		diabdat_mpq = NULL;
	}
	if (patch_rt_mpq) {
		SFileCloseArchive(patch_rt_mpq);
		patch_rt_mpq = NULL;
	}
	if (unused_mpq) {
		SFileCloseArchive(unused_mpq);
		unused_mpq = NULL;
	}

	UiDestroy();
	effects_cleanup_sfx();
	sound_cleanup();
	NetClose();
	dx_cleanup();
	MI_Dummy(show_cursor);
	StormDestroy();

	if (show_cursor)
		ShowCursor(TRUE);
}

void __cdecl init_run_office_from_start_menu()
{
	HWND v0;            // eax
	char pszPath[256];  // [esp+0h] [ebp-104h]
	LPITEMIDLIST ppidl; // [esp+100h] [ebp-4h]

	if (killed_mom_parent) {
		//*pszPath = empty_string;
		killed_mom_parent = 0;
		memset(pszPath, 0, sizeof(pszPath));
		// *(_WORD *)&pszPath[253] = 0;
		//pszPath[255] = 0;
		ppidl = 0;
		v0 = GetDesktopWindow();
		if (!SHGetSpecialFolderLocation(v0, CSIDL_STARTMENU, &ppidl)) {
			SHGetPathFromIDList(ppidl, pszPath);
			init_run_office(pszPath);
		}
	}
}
// 634CA0: using guessed type int killed_mom_parent;

void __fastcall init_run_office(char *dir)
{
	char *v1;                              // esi
	HANDLE v2;                             // ebx
	BOOLEAN v3;                            // zf
	HWND v4;                               // eax
	char Directory[260];                   // [esp+8h] [ebp-348h]
	char FileName[260];                    // [esp+10Ch] [ebp-244h]
	struct _WIN32_FIND_DATAA FindFileData; // [esp+210h] [ebp-140h]

	v1 = dir;
	strcpy(FileName, dir);
	if (FileName[0] && Directory[strlen(FileName) + 259] == '\\')
		strcat(FileName, "*");
	else
		strcat(FileName, "\\*");
	v2 = FindFirstFile(FileName, &FindFileData);
	if (v2 != (HANDLE)-1) {
		do {
			if (FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
				if (strcmp(FindFileData.cFileName, ".") && strcmp(FindFileData.cFileName, "..")) {
					//*Directory = empty_string;
					memset(Directory, 0, sizeof(Directory));
					v3 = *v1 == 0;
					// *(_WORD *)&Directory[257] = 0;
					//Directory[259] = 0;
					if (v3 || v1[strlen(v1) - 1] != '\\')
						sprintf(Directory, "%s\\%s\\", v1, FindFileData.cFileName);
					else
						sprintf(Directory, "%s%s\\", v1, FindFileData.cFileName);
					init_run_office(Directory);
				}
			} else if (!_strcmpi(FindFileData.cFileName, "Microsoft Office Shortcut Bar.lnk")) {
				v4 = GetDesktopWindow();
				ShellExecute(v4, "open", FindFileData.cFileName, "", v1, SW_SHOWNORMAL);
			}
		} while (FindNextFile(v2, &FindFileData));
		FindClose(v2);
	}
}

void __fastcall init_disable_screensaver(BOOLEAN disable)
{
	BOOLEAN v1;     // al
	char Data[16];  // [esp+4h] [ebp-20h]
	DWORD Type;     // [esp+14h] [ebp-10h]
	DWORD cbData;   // [esp+18h] [ebp-Ch]
	HKEY phkResult; // [esp+1Ch] [ebp-8h]
	BOOLEAN v6;     // [esp+20h] [ebp-4h]

	// BUGFIX: this is probably the worst possible way to do this. Alternatives: ExtEscape() with SETPOWERMANAGEMENT,
	// SystemParametersInfo() with SPI_SETSCREENSAVEACTIVE/SPI_SETPOWEROFFACTIVE/SPI_SETLOWPOWERACTIVE

	v6 = disable;
	if (!RegOpenKeyEx(HKEY_CURRENT_USER, "Control Panel\\Desktop", 0, KEY_READ | KEY_WRITE, &phkResult)) {
		if (v6) {
			cbData = 16;
			if (!RegQueryValueEx(phkResult, "ScreenSaveActive", 0, &Type, (LPBYTE)Data, &cbData))
				screensaver_enabled_prev = Data[0] != '0';
			v1 = 0;
		} else {
			v1 = screensaver_enabled_prev;
		}
		Data[1] = 0;
		Data[0] = (v1 != 0) + '0';
		RegSetValueEx(phkResult, "ScreenSaveActive", 0, REG_SZ, (const BYTE *)Data, 2u);
		RegCloseKey(phkResult);
	}
}

void __fastcall init_create_window(int nCmdShow)
{
	int nHeight;      // eax
	HWND hWnd;        // esi
	WNDCLASSEXA wcex; // [esp+8h] [ebp-34h]
	int nWidth;       // [esp+38h] [ebp-4h]

	init_kill_mom_parent();
	pfile_init_save_directory();
	memset(&wcex, 0, sizeof(wcex));
	wcex.cbSize = sizeof(wcex);
	wcex.style = CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc = WindowProc;
	wcex.hInstance = ghInst;
	wcex.hIcon = LoadIcon(ghInst, MAKEINTRESOURCE(IDI_ICON1));
	wcex.hCursor = LoadCursor(0, IDC_ARROW);
	wcex.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
	wcex.lpszMenuName = "DIABLO";
	wcex.lpszClassName = "DIABLO";
	wcex.hIconSm = (HICON)LoadImage(ghInst, MAKEINTRESOURCE(IDI_ICON1), IMAGE_ICON, 16, 16, LR_DEFAULTCOLOR);
	if (!RegisterClassEx(&wcex))
		TermMsg("Unable to register window class");
	if (GetSystemMetrics(SM_CXSCREEN) >= 640)
		nWidth = GetSystemMetrics(SM_CXSCREEN);
	else
		nWidth = 640;
	if (GetSystemMetrics(SM_CYSCREEN) >= 480)
		nHeight = GetSystemMetrics(SM_CYSCREEN);
	else
		nHeight = 480;
	hWnd = CreateWindowEx(0, "DIABLO", "DIABLO", WS_POPUP, 0, 0, nWidth, nHeight, NULL, NULL, ghInst, NULL);
	if (!hWnd)
		TermMsg("Unable to create main window");
	ShowWindow(hWnd, SW_SHOWNORMAL); // nCmdShow used only in beta: ShowWindow(hWnd, nCmdShow)
	UpdateWindow(hWnd);
	init_await_mom_parent_exit();
	dx_init(hWnd);
	BlackPalette();
	snd_init(hWnd);
	init_archives();
	init_disable_screensaver(1);
}

void __cdecl init_kill_mom_parent()
{
	HWND v0; // eax

	v0 = init_find_mom_parent();
	if (v0) {
		PostMessage(v0, WM_CLOSE, 0, 0);
		killed_mom_parent = 1;
	}
}
// 634CA0: using guessed type int killed_mom_parent;

HWND __cdecl init_find_mom_parent()
{
	HWND i;              // eax
	HWND v1;             // esi
	char ClassName[256]; // [esp+4h] [ebp-100h]

	for (i = GetForegroundWindow();; i = GetWindow(v1, GW_HWNDNEXT)) {
		v1 = i;
		if (!i)
			break;
		GetClassName(i, ClassName, 255);
		if (!_strcmpi(ClassName, "MOM Parent"))
			break;
	}
	return v1;
}

void __cdecl init_await_mom_parent_exit()
{
	DWORD v0; // edi

	v0 = GetTickCount();
	do {
		if (!init_find_mom_parent())
			break;
		Sleep(250);
	} while (GetTickCount() - v0 <= 4000);
}

void __cdecl init_archives()
{
	void *a1; // [esp+8h] [ebp-8h]
#ifdef COPYPROT
	int v1; // [esp+Ch] [ebp-4h]
#endif

	fileinfo.size = 20;
	fileinfo.versionstring = gszVersionNumber;
	fileinfo.executablefile = diablo_exe_path;
	fileinfo.originalarchivefile = diabdat_mpq_path;
	fileinfo.patcharchivefile = patch_rt_mpq_path;
	init_get_file_info();
#ifdef COPYPROT
	while (1) {
#endif
		diabdat_mpq = init_test_access(diabdat_mpq_path, "\\diabdat.mpq", "DiabloCD", 1000, FS_CD);
#ifdef COPYPROT
		if (diabdat_mpq)
			break;
		UiCopyProtError(&v1);
		if (v1 == COPYPROT_CANCEL)
			FileErrDlg("diabdat.mpq");
	}
#endif
	if (!WOpenFile("ui_art\\title.pcx", &a1, 1))
		FileErrDlg("Main program archive: diabdat.mpq");
	WCloseFile(a1);
	patch_rt_mpq = init_test_access(patch_rt_mpq_path, "\\patch_rt.mpq", "DiabloInstall", 2000, FS_PC);
}

void *__fastcall init_test_access(char *mpq_path, char *mpq_name, char *reg_loc, int flags, int fs)
{
	char *v5;           // esi
	char *v7;           // eax
	char Filename[260]; // [esp+Ch] [ebp-314h]
	char Buffer[260];   // [esp+110h] [ebp-210h]
	char v15[260];      // [esp+214h] [ebp-10Ch]
	char *mpq_namea;    // [esp+318h] [ebp-8h]
	void *archive;      // [esp+31Ch] [ebp-4h]

	mpq_namea = mpq_name;
	v5 = mpq_path;
	if (!GetCurrentDirectory(0x104u, Buffer))
		TermMsg("Can't get program path");
	init_strip_trailing_slash(Buffer);
	if (!SFileSetBasePath(Buffer))
		TermMsg("SFileSetBasePath");
	if (!GetModuleFileName(ghInst, Filename, 0x104u))
		TermMsg("Can't get program name");
	v7 = strrchr(Filename, '\\');
	if (v7)
		*v7 = 0;
	init_strip_trailing_slash(Filename);
	strcpy(v5, Buffer);
	strcat(v5, mpq_namea);
#ifdef COPYPROT
	if (SFileOpenArchive(v5, flags, fs, &archive))
#else
	if (SFileOpenArchive(v5, flags, FS_PC, &archive))
#endif
		return archive;
	if (strcmp(Filename, Buffer)) {
		strcpy(v5, Filename);
		strcat(v5, mpq_namea);
#ifdef COPYPROT
		if (SFileOpenArchive(v5, flags, fs, &archive))
#else
		if (SFileOpenArchive(v5, flags, FS_PC, &archive))
#endif
			return archive;
	}
	v15[0] = 0;
	if (reg_loc) {
		if (SRegLoadString("Archives", (const char *)reg_loc, 0, v15, 260)) {
			init_strip_trailing_slash(v15);
			strcpy(v5, v15);
			strcat(v5, mpq_namea);
#ifdef COPYPROT
			if (SFileOpenArchive(v5, flags, fs, &archive))
#else
			if (SFileOpenArchive(v5, flags, FS_PC, &archive))
#endif
				return archive;
		}
	}
	if (fs == FS_CD && init_read_test_file(v15, mpq_namea, flags, &archive)) {
		strcpy(v5, v15);
		return archive;
	}
	return 0;
}

char *__fastcall init_strip_trailing_slash(char *path)
{
	char *result; // eax

	result = strrchr(path, '\\');
	if (result) {
		if (!result[1])
			*result = 0;
	}
	return result;
}

int __fastcall init_read_test_file(char *mpq_path, char *mpq_name, int flags, void **archive)
{
	char *v4;         // edi
	DWORD v5;         // eax
	const char *v7;   // ebx
	const char *v8;   // esi
	char Buffer[260]; // [esp+Ch] [ebp-108h]
	char *mpq_patha;  // [esp+110h] [ebp-4h]

	v4 = mpq_name;
	mpq_patha = mpq_path;
	v5 = GetLogicalDriveStrings(0x104u, Buffer);
	if (!v5 || v5 > 0x104)
		return 0;
	while (*v4 == '\\')
		++v4;
	v7 = Buffer;
	if (!Buffer[0])
		return 0;
	while (1) {
		v8 = v7;
		v7 += strlen(v7) + 1;
		if (GetDriveType(v8) == DRIVE_CDROM) {
			strcpy(mpq_patha, v8);
			strcat(mpq_patha, v4);
			if (SFileOpenArchive(mpq_patha, flags, 1, archive))
				break;
		}
		if (!*v7)
			return 0;
	}
	return 1;
}

void __cdecl init_get_file_info()
{
	int v0;                     // eax
	DWORD v1;                   // edi
	void *v2;                   // ebx
	unsigned int uBytes;        // [esp+8h] [ebp-Ch]
	DWORD dwHandle;             // [esp+Ch] [ebp-8h]
	VS_FIXEDFILEINFO *lpBuffer; // [esp+10h] [ebp-4h]

	if (GetModuleFileName(ghInst, diablo_exe_path, 0x104u)) {
		v0 = GetFileVersionInfoSize(diablo_exe_path, &dwHandle);
		v1 = v0;
		if (v0) {
			v2 = DiabloAllocPtr(v0);
			if (GetFileVersionInfo(diablo_exe_path, 0, v1, v2)) {
				if (VerQueryValue(v2, "\\", (LPVOID *)&lpBuffer, &uBytes))
					sprintf(
					    gszVersionNumber,
					    "version %d.%d.%d.%d",
					    lpBuffer->dwProductVersionMS >> 16,
					    lpBuffer->dwProductVersionMS & 0xFFFF,
					    lpBuffer->dwProductVersionLS >> 16,
					    lpBuffer->dwProductVersionLS & 0xFFFF);
			}
			mem_free_dbg(v2);
		}
	}
}

LRESULT __stdcall MainWndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
	if (Msg > WM_ERASEBKGND) {
		if (Msg == WM_ACTIVATEAPP) {
			init_activate_window(hWnd, wParam);
		} else {
			if (Msg == WM_QUERYNEWPALETTE) {
				SDrawRealizePalette();
				return 1;
			}
			if (Msg == WM_PALETTECHANGED && (HWND)wParam != hWnd)
				SDrawRealizePalette();
		}
	} else {
		switch (Msg) {
		case WM_ERASEBKGND:
			return 0;
		case WM_CREATE:
			ghMainWnd = hWnd;
			break;
		case WM_DESTROY:
			init_cleanup(1);
			ghMainWnd = 0;
			PostQuitMessage(0);
			break;
		case WM_PAINT:
			drawpanflag = 255;
			break;
		case WM_CLOSE:
			return 0;
		}
	}
	return DefWindowProc(hWnd, Msg, wParam, lParam);
}
// 52571C: using guessed type int drawpanflag;

void __fastcall init_activate_window(HWND hWnd, BOOLEAN bActive)
{
	LONG dwNewLong; // eax

	gbActive = bActive;
	UiAppActivate(bActive);
	dwNewLong = GetWindowLong(hWnd, GWL_STYLE);

	if (gbActive && fullscreen)
		dwNewLong &= ~WS_SYSMENU;
	else
		dwNewLong |= WS_SYSMENU;

	SetWindowLong(hWnd, GWL_STYLE, dwNewLong);

	if (gbActive) {
		drawpanflag = 255;
		ResetPal();
	}
}
// 52571C: using guessed type int drawpanflag;
// 634980: using guessed type int gbActive;

LRESULT __stdcall WindowProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
	LRESULT result; // eax

	if (CurrentProc)
		result = CurrentProc(hWnd, Msg, wParam, lParam);
	else
		result = MainWndProc(hWnd, Msg, wParam, lParam);
	return result;
}

WNDPROC __fastcall SetWindowProc(WNDPROC NewProc)
{
	WNDPROC OldProc; // eax

	OldProc = CurrentProc;
	CurrentProc = NewProc;
	return OldProc;
}