#define APPNAM "ZoiteChat"
#define APPVER "<#= [string]::Join('.', $versionParts) #>"
; These are defined by our installer project at build time
;#define APPARCH "x64"
;#define PROJECTDIR "C:\...\zoitechat\win32\installer\"

;http://mitrich.net23.net/?/inno-download-plugin.html
#ifexist "idp.iss"
#define USE_INNO_DOWNLOAD_PLUGIN
#include <idp.iss>
#endif

[Setup]
AppName=ZoiteChat
AppVersion={#APPVER}
AppVerName=ZoiteChat {#APPVER}
AppPublisher=ZoiteChat
AppPublisherURL=http://zoitechat.zoite.net
AppCopyright=Copyright (C) 1998-2010 Peter Zelezny
AppSupportURL=https://github.com/zoitechat/zoitechat/issues
AppUpdatesURL=http://zoitechat.zoite.net/downloads.html
LicenseFile=share\doc\zoitechat\COPYING
UninstallDisplayIcon={app}\zoitechat.exe
UninstallDisplayName=ZoiteChat
DefaultDirName={pf64}\ZoiteChat
DefaultGroupName=ZoiteChat
AllowNoIcons=yes
SolidCompression=yes
Compression=lzma2/ultra64
SourceDir=..\rel
OutputDir=..
OutputBaseFilename={#APPNAM}-{#APPVER}_x64
FlatComponentsList=no
PrivilegesRequired=none
ShowComponentSizes=no
CreateUninstallRegKey=not IsTaskSelected('portable')
Uninstallable=not IsTaskSelected('portable')
ArchitecturesAllowed=x64
ArchitecturesInstallIn64BitMode=x64
MinVersion=6.1
WizardImageFile={#PROJECTDIR}wizardimage.bmp
WizardSmallImageFile={#PROJECTDIR}wizardsmallimage.bmp
SetupIconFile={#PROJECTDIR}..\..\data\icons\zoitechat.ico

[Types]
Name: "normal"; Description: "Normal Installation"
Name: "minimal"; Description: "Minimal Installation"
Name: "custom"; Description: "Custom Installation"; Flags: iscustom

[Components]
Name: "libs"; Description: "ZoiteChat"; Types: normal minimal custom; Flags: fixed
Name: "xctext"; Description: "ZoiteChat-Text"; Types: custom; Flags: disablenouninstallwarning
Name: "icons"; Description: "Create Shortcuts"; Types: custom; Flags: disablenouninstallwarning
Name: "icons\desktopicon"; Description: "Create Desktop Shortcut"; Types: custom; Flags: disablenouninstallwarning
Name: "icons\quicklaunchicon"; Description: "Create Quick Launch Shortcut"; Types: custom; Flags: disablenouninstallwarning
Name: "translations"; Description: "Translations"; Types: normal custom; Flags: disablenouninstallwarning
Name: "spell"; Description: "Spelling Dictionaries"; Types: custom; Flags: disablenouninstallwarning
Name: "plugins"; Description: "Plugins"; Types: custom; Flags: disablenouninstallwarning
Name: "plugins\checksum"; Description: "Checksum"; Types: custom; Flags: disablenouninstallwarning
Name: "plugins\exec"; Description: "Exec"; Types: custom; Flags: disablenouninstallwarning
Name: "plugins\fishlim"; Description: "FiSHLiM"; Types: custom; Flags: disablenouninstallwarning
Name: "plugins\sysinfo"; Description: "SysInfo"; Types: custom; Flags: disablenouninstallwarning
Name: "plugins\upd"; Description: "Update Checker"; Types: normal custom; Flags: disablenouninstallwarning
Name: "plugins\winamp"; Description: "Winamp"; Types: custom; Flags: disablenouninstallwarning
Name: "langs"; Description: "Language Interfaces"; Types: custom; Flags: disablenouninstallwarning
Name: "langs\lua"; Description: "Lua"; Types: normal custom; Flags: disablenouninstallwarning
Name: "langs\perl"; Description: "Perl (requires Perl 5.20)"; Types: custom; Flags: disablenouninstallwarning
Name: "langs\python"; Description: "Python (requires Python 3.14.2)"; Types: custom; Flags: disablenouninstallwarning

[Tasks]
Name: portable; Description: "Yes"; GroupDescription: "Portable Mode: Stores configuration files within install directory for portable drives."; Flags: unchecked

[Registry]
Root: HKCR; Subkey: "irc"; ValueType: none; ValueName: ""; ValueData: ""; Flags: deletekey uninsdeletekey; Tasks: not portable
Root: HKCR; Subkey: "irc"; ValueType: string; ValueName: ""; ValueData: "URL:IRC Protocol"; Flags: uninsdeletevalue; Tasks: not portable
Root: HKCR; Subkey: "irc"; ValueType: string; ValueName: "URL Protocol"; ValueData: ""; Flags: uninsdeletevalue; Tasks: not portable
Root: HKCR; Subkey: "irc\DefaultIcon"; ValueType: string; ValueName: ""; ValueData: "{app}\zoitechat.exe,0"; Flags: uninsdeletevalue; Tasks: not portable
Root: HKCR; Subkey: "irc\shell"; ValueType: string; ValueName: ""; ValueData: "open"; Flags: uninsdeletevalue; Tasks: not portable
Root: HKCR; Subkey: "irc\shell\open\command"; ValueType: string; ValueName: ""; ValueData: "{app}\zoitechat.exe --url=""%1"""; Flags: uninsdeletevalue; Tasks: not portable
Root: HKCR; Subkey: ".zct"; ValueType: string; ValueName: ""; ValueData: "ZoiteChat.Theme"; Flags: uninsdeletevalue; Tasks: not portable
Root: HKCR; Subkey: ".hct"; ValueType: string; ValueName: ""; ValueData: "ZoiteChat.Theme"; Flags: uninsdeletevalue; Tasks: not portable
Root: HKCR; Subkey: "ZoiteChat.Theme"; ValueType: string; ValueName: ""; ValueData: "ZoiteChat Theme"; Flags: uninsdeletekey; Tasks: not portable
Root: HKCR; Subkey: "ZoiteChat.Theme\DefaultIcon"; ValueType: string; ValueName: ""; ValueData: "{app}\zoitechat.exe,0"; Flags: uninsdeletevalue; Tasks: not portable
Root: HKCR; Subkey: "ZoiteChat.Theme\shell\open\command"; ValueType: string; ValueName: ""; ValueData: """{app}\zoitechat.exe"" ""%1"""; Flags: uninsdeletevalue; Tasks: not portable

[Run]
Filename: "{app}\zoitechat.exe"; Description: "Run ZoiteChat after closing the Wizard"; Flags: nowait postinstall skipifsilent
Filename: "http://docs.zoitechat.org/en/latest/changelog.html"; Description: "See what's changed"; Flags: shellexec runasoriginaluser postinstall skipifsilent unchecked
Filename: "{tmp}\vcredist.exe"; Parameters: "/install /quiet /norestart"; StatusMsg: "Installing Visual C++ Redistributable"; Flags: skipifdoesntexist; Tasks: not portable
Filename: "{tmp}\perl.msi"; StatusMsg: "Installing Perl"; Components: langs\perl; Flags: shellexec skipifdoesntexist; Tasks: not portable
Filename: "{tmp}\python.msi"; StatusMsg: "Installing Python"; Components: langs\python; Flags: shellexec skipifdoesntexist; Tasks: not portable
Filename: "{tmp}\python.exe"; Parameters: "InstallAllUsers=1 PrependPath=1"; StatusMsg: "Installing Python"; Components: langs\python; Flags: shellexec skipifdoesntexist; Tasks: not portable
Filename: "{tmp}\spelling-dicts.exe"; Parameters: "/verysilent"; StatusMsg: "Installing Spelling Dictionaries"; Components: spell; Flags: skipifdoesntexist; Tasks: not portable

[Files]
Source: "portable-mode"; DestDir: "{app}"; Tasks: portable

Source: "changelog.url"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "readme.url"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "cert.pem"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "share\xml\*"; DestDir: "{app}\share\xml"; Flags: ignoreversion createallsubdirs recursesubdirs; Components: libs
Source: "share\doc\zoitechat\*"; DestDir: "{app}\share\doc\zoitechat"; Flags: ignoreversion createallsubdirs recursesubdirs; Components: libs
Source: "share\doc\WinSparkle\*"; DestDir: "{app}\share\doc\WinSparkle"; Flags: ignoreversion createallsubdirs recursesubdirs; Components: libs
Source: "share\themes\MS-Windows\*"; DestDir: "{app}\share\themes\MS-Windows"; Flags: ignoreversion createallsubdirs recursesubdirs skipifsourcedoesntexist; Components: libs
Source: "share\glib-2.0\schemas\*"; DestDir: "{app}\share\glib-2.0\schemas"; Flags: ignoreversion createallsubdirs recursesubdirs skipifsourcedoesntexist; Components: libs
Source: "share\locale\*"; DestDir: "{app}\share\locale"; Flags: ignoreversion createallsubdirs recursesubdirs; Components: translations
Source: "etc\fonts\*"; DestDir: "{app}\etc\fonts"; Flags: ignoreversion createallsubdirs recursesubdirs; Components: libs

Source: "atk-1.0-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "cairo-2.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "freetype-6.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "fribidi-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "fontconfig-1.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "gdk_pixbuf-2.0-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "gdk-3-vs17.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "epoxy-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "gio-2.0-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "glib-2.0-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "gmodule-2.0-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "gobject-2.0-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "gspawn-win64-helper.exe"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "gspawn-win64-helper-console.exe"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "gthread-2.0-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "iconv.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "libcrypto-3-x64.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "libssl-3-x64.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "libenchant.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "ffi-8.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "intl.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "libpng16.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "xml2-16.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "pango-1.0-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "pangocairo-1.0-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "cairo-gobject-2.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "pangoft2-1.0-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "pangowin32-1.0-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "zlib1.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "jpeg62.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "harfbuzz.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "gtk-3-vs17.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "libexpat.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "pcre2-8-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "pixman-1-0.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "tiff.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: libs

Source: "plugins\hcnotifications-winrt.dll"; DestDir: "{app}\plugins"; Flags: ignoreversion; Components: libs

Source: "lib\enchant\*"; DestDir: "{app}\lib\enchant"; Flags: ignoreversion; Components: libs

Source: "girepository-2.0-0.dll"; DestDir: "{app}"; Flags: ignoreversion skipifsourcedoesntexist; Components: langs\lua
Source: "lua51.dll"; DestDir: "{app}"; Flags: ignoreversion skipifsourcedoesntexist; Components: langs\lua
Source: "luajit-5.1.dll"; DestDir: "{app}"; Flags: ignoreversion skipifsourcedoesntexist; Components: langs\lua
Source: "luajit.dll"; DestDir: "{app}"; Flags: ignoreversion skipifsourcedoesntexist; Components: langs\lua
Source: "lib\lua\2.1\lgi\*.dll"; DestDir: "{app}\lib\lua\lgi"; Flags: ignoreversion skipifsourcedoesntexist; Components: langs\lua
Source: "lib\lua\5.1\lgi\*.dll"; DestDir: "{app}\lib\lua\lgi"; Flags: ignoreversion skipifsourcedoesntexist; Components: langs\lua
Source: "lib\girepository-1.0\*.typelib"; DestDir: "{app}\lib\girepository-1.0"; Flags: ignoreversion skipifsourcedoesntexist; Components: langs\lua
Source: "share\lua\2.1\*.lua"; DestDir: "{app}\share\lua"; Flags: ignoreversion skipifsourcedoesntexist; Components: langs\lua
Source: "share\lua\2.1\lgi\*.lua"; DestDir: "{app}\share\lua\lgi"; Flags: ignoreversion skipifsourcedoesntexist; Components: langs\lua
Source: "share\lua\2.1\lgi\override\*.lua"; DestDir: "{app}\share\lua\lgi\override"; Flags: ignoreversion skipifsourcedoesntexist; Components: langs\lua
Source: "share\lua\5.1\*.lua"; DestDir: "{app}\share\lua"; Flags: ignoreversion skipifsourcedoesntexist; Components: langs\lua
Source: "share\lua\5.1\lgi\*.lua"; DestDir: "{app}\share\lua\lgi"; Flags: ignoreversion skipifsourcedoesntexist; Components: langs\lua
Source: "share\lua\5.1\lgi\override\*.lua"; DestDir: "{app}\share\lua\lgi\override"; Flags: ignoreversion skipifsourcedoesntexist; Components: langs\lua
Source: "plugins\hclua.dll"; DestDir: "{app}\plugins"; Flags: ignoreversion; Components: langs\lua

Source: "plugins\hcchecksum.dll"; DestDir: "{app}\plugins"; Flags: ignoreversion; Components: plugins\checksum
Source: "plugins\hcexec.dll"; DestDir: "{app}\plugins"; Flags: ignoreversion; Components: plugins\exec
Source: "plugins\hcfishlim.dll"; DestDir: "{app}\plugins"; Flags: ignoreversion; Components: plugins\fishlim
Source: "share\music.png"; DestDir: "{app}\share"; Flags: ignoreversion; Components: plugins\winamp
Source: "share\download.png"; DestDir: "{app}\share"; Flags: ignoreversion; Components: plugins\upd
Source: "plugins\hcupd.dll"; DestDir: "{app}\plugins"; Flags: ignoreversion; Components: plugins\upd
Source: "WinSparkle.dll"; DestDir: "{app}"; Flags: ignoreversion; Components: plugins\upd
Source: "plugins\hcwinamp.dll"; DestDir: "{app}\plugins"; Flags: ignoreversion; Components: plugins\winamp
Source: "share\system.png"; DestDir: "{app}\share"; Flags: ignoreversion; Components: plugins\sysinfo
Source: "plugins\hcsysinfo.dll"; DestDir: "{app}\plugins"; Flags: ignoreversion; Components: plugins\sysinfo
Source: "plugins\hcperl.dll"; DestDir: "{app}\plugins"; Flags: ignoreversion; Components: langs\perl

Source: "python\*.py"; DestDir: "{app}\python"; Flags: ignoreversion; Components: langs\python

Source: "plugins\hcpython3.dll"; DestDir: "{app}\plugins"; Flags: ignoreversion; Components: langs\python
Source: "_cffi_backend.cp3*.pyd"; DestDir: "{app}"; Flags: ignoreversion; Components: langs\python

Source: "zoitechat.exe"; DestDir: "{app}"; Flags: ignoreversion; Components: libs
Source: "zoitechat-text.exe"; DestDir: "{app}"; Flags: ignoreversion; Components: xctext

[Icons]
Name: "{group}\ZoiteChat"; Filename: "{app}\zoitechat.exe"; AppUserModelID: "ZoiteChat.Desktop.Notify"; Tasks: not portable; Check: not WizardNoIcons
Name: "{group}\ZoiteChat Safe Mode"; Filename: "{app}\zoitechat.exe"; Parameters: "--no-auto --no-plugins"; Tasks: not portable; Check: not WizardNoIcons
Name: "{group}\ZoiteChat ChangeLog"; Filename: "{app}\changelog.url"; IconFilename: "{sys}\shell32.dll"; IconIndex: 165; Tasks: not portable; Check: not WizardNoIcons
Name: "{group}\ZoiteChat ReadMe"; Filename: "{app}\readme.url"; IconFilename: "{sys}\shell32.dll"; IconIndex: 23; Tasks: not portable; Check: not WizardNoIcons
Name: "{group}\ZoiteChat Config Folder"; Filename: "%APPDATA%\ZoiteChat\"; Tasks: not portable; Check: not WizardNoIcons
Name: "{group}\ZoiteChat-Text"; Filename: "{app}\zoitechat-text.exe"; Components: xctext; Tasks: not portable; Check: not WizardNoIcons
Name: "{group}\Uninstall ZoiteChat"; Filename: "{uninstallexe}"; Tasks: not portable; Check: not WizardNoIcons
Name: "{commondesktop}\ZoiteChat"; Filename: "{app}\zoitechat.exe"; AppUserModelID: "ZoiteChat.Desktop.Notify"; Components: icons\desktopicon; Tasks: not portable
Name: "{commonappdata}\Microsoft\Internet Explorer\Quick Launch\ZoiteChat"; Filename: "{app}\zoitechat.exe"; Components: icons\quicklaunchicon; Tasks: not portable

[Messages]
BeveledLabel= {#APPNAM}

[Code]
#ifndef USE_INNO_DOWNLOAD_PLUGIN
// The Inno Download Plugin isn't always installed in CI environments.
// Provide no-op fallback procedures so installer compilation still succeeds.
procedure idpDownloadAfter(PageID: Integer);
begin
end;

procedure idpClearFiles;
begin
end;

procedure idpAddFile(URL: String; Filename: String);
begin
end;
#endif

/////////////////////////////////////////////////////////////////////
procedure InitializeWizard;
begin
	WizardForm.LicenseAcceptedRadio.Checked := True;

	idpDownloadAfter(wpReady);
end;

/////////////////////////////////////////////////////////////////////
function GetSysDir(): String;
begin
	Result := ExpandConstant('{sys}\');
end;

/////////////////////////////////////////////////////////////////////
function CheckDLL(DLLName: String): Boolean;
var
	ResultCode: Integer;
begin
	if ExecAsOriginalUser(GetSysDir() + 'where.exe', '/Q ' + DLLName,
						'', SW_HIDE, ewWaitUntilTerminated, ResultCode) then
		Result := ResultCode = 0 // 0 is success
	else
		Result := False;
end;

/////////////////////////////////////////////////////////////////////
function CheckVCInstall(): Boolean;
begin
	Result := FileExists(GetSysDir() + 'vcruntime140.dll');;
end;


/////////////////////////////////////////////////////////////////////
function CheckSpellInstall(): Boolean;
var
	Version: TWindowsVersion;
begin
	GetWindowsVersionEx(Version);

	// Windows 8 or greater has built in spell check.
	if Version.NTPlatform and (Version.Major > 6) or ((Version.Major = 6) and (Version.Minor > 1)) then
		Result := True
	else
		Result := DirExists(ExpandConstant('{localappdata}') + '\enchant\myspell');
end;

/////////////////////////////////////////////////////////////////////
// Sets up the automatic downloads
/////////////////////////////////////////////////////////////////////
procedure CurPageChanged(CurPageID: Integer);
var
	REDIST: String;
	PERL: String;
	PY3: String;
	SPELL: String;
begin
  if(CurPageID = wpReady) then
  begin
    idpClearFiles;

	if not IsTaskSelected('portable') then
	begin

		REDIST := 'https://github.com/zoitechat/gvsbuild/releases/download/zoitechat-2.16.2/vcredist_2015_x64.exe';
		PERL := 'https://github.com/zoitechat/gvsbuild/releases/download/zoitechat-2.16.2/Perl.5.20.0.x64.msi';
		PY3 := 'https://www.python.org/ftp/python/3.14.2/python-3.14.2-amd64.exe';
		SPELL := 'https://github.com/zoitechat/gvsbuild/releases/download/zoitechat-2.16.2/ZoiteChat.Spelling.Dictionaries.r2.exe';

		if not CheckVCInstall() then
			idpAddFile(REDIST, ExpandConstant('{tmp}\vcredist.exe'));

		if IsComponentSelected('spell') and not CheckSpellInstall() then
			idpAddFile(SPELL, ExpandConstant('{tmp}\spelling-dicts.exe'));

		if not WizardSilent() then
		begin
			if IsComponentSelected('langs\perl') and not CheckDLL('perl520.dll') then
			begin
				idpAddFile(PERL, ExpandConstant('{tmp}\perl.msi'))
			end;

			if IsComponentSelected('langs\python') and not CheckDLL('python314.dll') then
                idpAddFile(PY3, ExpandConstant('{tmp}\python.exe'));
		end;
	end;
  end;
end;

/////////////////////////////////////////////////////////////////////
// Disable portable-mode if installing to program files
/////////////////////////////////////////////////////////////////////
function NextButtonClick(CurPageID: Integer): Boolean;
begin
	if (CurPageID = wpSelectTasks) then
		if (WizardForm.TasksList.Checked[1] = True) then
			if (WizardDirValue() = ExpandConstant('{pf64}\ZoiteChat')) then
			begin
				WizardForm.TasksList.Checked[1] := False
				MsgBox('Portable mode is only intended for use on portable drives and has been disabled.', mbInformation, MB_OK)
			end;

	Result := True; // Always continue
end;

/////////////////////////////////////////////////////////////////////
// these are required for x86->x64 or reverse upgrades
/////////////////////////////////////////////////////////////////////
function GetUninstallString(): String;
var
	sUnInstPath: String;
	sUnInstallString: String;
begin
	sUnInstPath := ExpandConstant('Software\Microsoft\Windows\CurrentVersion\Uninstall\ZoiteChat (x64)_is1');
	sUnInstallString := '';
	if not RegQueryStringValue(HKLM, sUnInstPath, 'UninstallString', sUnInstallString) then
		RegQueryStringValue(HKCU, sUnInstPath, 'UninstallString', sUnInstallString);
	if not (sUnInstallString <> '') then
		sUnInstPath := ExpandConstant('Software\Microsoft\Windows\CurrentVersion\Uninstall\ZoiteChat_is1');
				if not RegQueryStringValue(HKLM32, sUnInstPath, 'UninstallString', sUnInstallString) then
					if not RegQueryStringValue(HKCU32, sUnInstPath, 'UninstallString', sUnInstallString) then
						if IsWin64 then
							if not RegQueryStringValue(HKLM64, sUnInstPath, 'UninstallString', sUnInstallString) then
								RegQueryStringValue(HKCU64, sUnInstPath, 'UninstallString', sUnInstallString);
	Result := sUnInstallString;
end;

/////////////////////////////////////////////////////////////////////
function IsUpgrade(): Boolean;
begin
	Result := (GetUninstallString() <> '');
end;


/////////////////////////////////////////////////////////////////////
function UnInstallOldVersion(): Integer;
var
	sUnInstallString: String;
	iResultCode: Integer;
begin
// Return Values:
// 1 - uninstall string is empty
// 2 - error executing the UnInstallString
// 3 - successfully executed the UnInstallString

	// default return value
	Result := 0;

	// get the uninstall string of the old app
	sUnInstallString := GetUninstallString();
	if sUnInstallString <> '' then begin
		sUnInstallString := RemoveQuotes(sUnInstallString);
		if Exec(sUnInstallString, '/VERYSILENT /NORESTART /SUPPRESSMSGBOXES','', SW_HIDE, ewWaitUntilTerminated, iResultCode) then
			Result := 3
		else
			Result := 2;
	end else
		Result := 1;
end;

/////////////////////////////////////////////////////////////////////
procedure CurStepChanged(CurStep: TSetupStep);
begin
	if not (IsTaskSelected('portable')) then
	begin
		if (CurStep=ssInstall) then
		begin
			if (IsUpgrade()) then
			begin
				UnInstallOldVersion();
			end;
			DeleteFile(ExpandConstant('{app}\portable-mode'));
		end;
	end;
end;