; Script generated by the Inno Setup Script Wizard.
; SEE THE DOCUMENTATION FOR DETAILS ON CREATING INNO SETUP SCRIPT FILES!

#define MyAppName "olm"
#define MyAppVersion "1.0.0"
#define MyAppPublisher "Fossorial Inc."
#define MyAppURL "https://pangolin.net"
#define MyAppExeName "olm.exe"

[Setup]
; NOTE: The value of AppId uniquely identifies this application. Do not use the same AppId value in installers for other applications.
; (To generate a new GUID, click Tools | Generate GUID inside the IDE.)
AppId={{44A24E4C-B616-476F-ADE7-8D56B930959E}
AppName={#MyAppName}
AppVersion={#MyAppVersion}
;AppVerName={#MyAppName} {#MyAppVersion}
AppPublisher={#MyAppPublisher}
AppPublisherURL={#MyAppURL}
AppSupportURL={#MyAppURL}
AppUpdatesURL={#MyAppURL}
DefaultDirName={autopf}\{#MyAppName}
UninstallDisplayIcon={app}\{#MyAppExeName}
; "ArchitecturesAllowed=x64compatible" specifies that Setup cannot run
; on anything but x64 and Windows 11 on Arm.
ArchitecturesAllowed=x64compatible
; "ArchitecturesInstallIn64BitMode=x64compatible" requests that the
; install be done in "64-bit mode" on x64 or Windows 11 on Arm,
; meaning it should use the native 64-bit Program Files directory and
; the 64-bit view of the registry.
ArchitecturesInstallIn64BitMode=x64compatible
DefaultGroupName={#MyAppName}
DisableProgramGroupPage=yes
; Uncomment the following line to run in non administrative install mode (install for current user only).
;PrivilegesRequired=lowest
OutputBaseFilename=mysetup
SolidCompression=yes
WizardStyle=modern
; Add this to ensure PATH changes are applied and the system is prompted for a restart if needed
RestartIfNeededByRun=no
ChangesEnvironment=true

[Languages]
Name: "english"; MessagesFile: "compiler:Default.isl"

[Files]
; The 'DestName' flag ensures that 'olm_windows_amd64.exe' is installed as 'olm.exe'
Source: "C:\Users\Administrator\Downloads\olm_windows_amd64.exe"; DestDir: "{app}"; DestName: "{#MyAppExeName}"; Flags: ignoreversion
Source: "C:\Users\Administrator\Downloads\wintun.dll"; DestDir: "{app}"; Flags: ignoreversion
; NOTE: Don't use "Flags: ignoreversion" on any shared system files

[Icons]
Name: "{group}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"

[Registry]
; Add the application's installation directory to the system PATH environment variable.
; HKLM (HKEY_LOCAL_MACHINE) is used for system-wide changes.
; The 'Path' variable is located under 'SYSTEM\CurrentControlSet\Control\Session Manager\Environment'.
; ValueType: expandsz allows for environment variables (like %ProgramFiles%) in the path.
; ValueData: "{olddata};{app}" appends the current application directory to the existing PATH.
; Note: Removal during uninstallation is handled by CurUninstallStepChanged procedure in [Code] section.
; Check: NeedsAddPath ensures this is applied only if the path is not already present.
[Registry]
; Add the application's installation directory to the system PATH.
Root: HKLM; Subkey: "SYSTEM\CurrentControlSet\Control\Session Manager\Environment"; \
    ValueType: expandsz; ValueName: "Path"; ValueData: "{olddata};{app}"; \
    Check: NeedsAddPath(ExpandConstant('{app}'))

[Code]
function NeedsAddPath(Path: string): boolean;
var
  OrigPath: string;
begin
  if not RegQueryStringValue(HKEY_LOCAL_MACHINE,
    'SYSTEM\CurrentControlSet\Control\Session Manager\Environment',
    'Path', OrigPath)
  then begin
    // Path variable doesn't exist at all, so we definitely need to add it.
    Result := True;
    exit;
  end;
  
  // Perform a case-insensitive check to see if the path is already present.
  // We add semicolons to prevent partial matches (e.g., matching C:\App in C:\App2).
  if Pos(';' + UpperCase(Path) + ';', ';' + UpperCase(OrigPath) + ';') > 0 then
    Result := False
  else
    Result := True;
end;

procedure RemovePathEntry(PathToRemove: string);
var
  OrigPath: string;
  NewPath: string;
  PathList: TStringList;
  I: Integer;
begin
  if not RegQueryStringValue(HKEY_LOCAL_MACHINE,
    'SYSTEM\CurrentControlSet\Control\Session Manager\Environment',
    'Path', OrigPath)
  then begin
    // Path variable doesn't exist, nothing to remove
    exit;
  end;

  // Create a string list to parse the PATH entries
  PathList := TStringList.Create;
  try
    // Split the PATH by semicolons
    PathList.Delimiter := ';';
    PathList.StrictDelimiter := True;
    PathList.DelimitedText := OrigPath;
    
    // Find and remove the matching entry (case-insensitive)
    for I := PathList.Count - 1 downto 0 do
    begin
      if CompareText(Trim(PathList[I]), Trim(PathToRemove)) = 0 then
      begin
        Log('Found and removing PATH entry: ' + PathList[I]);
        PathList.Delete(I);
      end;
    end;
    
    // Reconstruct the PATH
    NewPath := PathList.DelimitedText;
    
    // Write the new PATH back to the registry
    if RegWriteExpandStringValue(HKEY_LOCAL_MACHINE,
      'SYSTEM\CurrentControlSet\Control\Session Manager\Environment',
      'Path', NewPath)
    then
      Log('Successfully removed path entry: ' + PathToRemove)
    else
      Log('Failed to write modified PATH to registry');
  finally
    PathList.Free;
  end;
end;

procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);
var
  AppPath: string;
begin
  if CurUninstallStep = usUninstall then
  begin
    // Get the application installation path
    AppPath := ExpandConstant('{app}');
    Log('Removing PATH entry for: ' + AppPath);
    
    // Remove only our path entry from the system PATH
    RemovePathEntry(AppPath);
  end;
end;