; 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;
  P: Integer;
  UpperOrigPath: string;
  UpperPathToRemove: string;
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;

  // Prepare for case-insensitive search
  UpperOrigPath := ';' + UpperCase(OrigPath) + ';';
  UpperPathToRemove := ';' + UpperCase(PathToRemove) + ';';
  
  // Check if the path exists in PATH
  P := Pos(UpperPathToRemove, UpperOrigPath);
  if P = 0 then
  begin
    // Path not found, nothing to remove
    exit;
  end;

  // Remove the path entry from OrigPath
  // We need to handle the actual string with proper casing
  NewPath := ';' + OrigPath + ';';
  
  // Find and remove the entry (case-insensitive search but preserve original casing in other entries)
  // We search for the pattern in the upper-case version but remove from the original
  Delete(NewPath, P, Length(PathToRemove) + 1); // +1 for the semicolon
  
  // Clean up: remove leading and trailing semicolons, and reduce multiple semicolons to one
  while (Length(NewPath) > 0) and (NewPath[1] = ';') do
    Delete(NewPath, 1, 1);
  while (Length(NewPath) > 0) and (NewPath[Length(NewPath)] = ';') do
    Delete(NewPath, Length(NewPath), 1);
  
  // Replace multiple semicolons with single semicolon
  while Pos(';;', NewPath) > 0 do
    StringChangeEx(NewPath, ';;', ';', True);
  
  // 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');
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;