uses
  Classes, SysUtils, Forms, Controls, Graphics, Dialogs, ComCtrls, StdCtrls,
  ExtCtrls, Buttons, ExtendedNotebook, SynEdit, fphttpclient, opensslsockets,
  RegExpr, LCLIntf, LCLType, IniPropStorage, Process, Helpers, fileinfo,
  {$IF DEFINED(WINDOWS)}
  winpeimagereader,
  {$ELSEIF DEFINED(DARWIN)}
  machoreader, ssockets, sslsockets, sslbase,
  {$ELSEIF DEFINED(LINUX)}
  elfreader,
  {$ENDIF}
  BuildOutputWindow;

type

    procedure FormCreate(Sender: TObject);
    procedure lblFossilRepoClick(Sender: TObject);
    procedure lblGithubRepoClick(Sender: TObject);
    procedure lblWebsiteClick(Sender: TObject);
    procedure rdPdfChange(Sender: TObject);
    procedure rdPsChange(Sender: TObject);
    procedure SynEdit1Change(Sender: TObject);
{$IFDEF DARWIN}
    procedure GetSocketHandler(Sender: TObject; const UseSSL: Boolean; out AHandler: TSocketHandler);
{$ENDIF}
  private
    var currentGroffFilePath: String;
    var currentGroffFileName: String;
    var hasGroff: Boolean;
    var unsavedChanges: Boolean;
{$IFDEF WINDOWS}
    var latestGroffWindowsUrl: String;
{$ENDIF}
    var storeBuildSettings: Boolean;
  public

  end;

var
  MainForm: TMainForm;
  BuildWindow: TBuildStatusWindow;

implementation

{$R *.lfm}

{ TMainForm }

procedure TMainForm.FormCreate(Sender: TObject);
var
  GroffOutputVersion: String;
  OnlineVersionsFile: String;
  {$IFDEF WINDOWS}
  reGroffVersion: TRegExpr;
  {$ENDIF}
  reGroffStudioVersion: TRegExpr;
  FileVerInfo: TFileVersionInfo;
  HasVersionUpdate: Integer;
  GroffHelpers: TGroffHelpers;
  ResStream: TResourceStream;
  {$IFDEF DARWIN}
  HTTPClient: TFPHttpClient;
  {$ENDIF}
begin
  // What's the current running groff version?
  if RunCommand('troff', ['--version'], GroffOutputVersion) then
  begin
    edtGroffInstalledVersion.Text := GroffOutputVersion;
    hasGroff := True;
  end else begin

       chkRefer.Checked := iniStorage.ReadBoolean('BuildUseRefer', False);
       chkTbl.Checked := iniStorage.ReadBoolean('BuildUseTbl', False);
       chkPdfMark.Checked := iniStorage.ReadBoolean('BuildUsePdfMark', False);
       rdPs.Checked := iniStorage.ReadBoolean('BuildToPostscript', False);
       rdPdf.Checked := iniStorage.ReadBoolean('BuildToPDF', False);
  end;


  // What's the latest available version?
  FileVerInfo := TFileVersionInfo.Create(nil);

  try
    FileVerInfo.ReadFileInfo;
    edtGroffStudioInstalledVersion.Text := FileVerInfo.VersionStrings.Values['FileVersion'];
    lblAboutProductName.Caption := FileVerInfo.VersionStrings.Values['ProductName'] + ' ' + FileVerInfo.VersionStrings.Values['FileVersion'];

    {$IFDEF WINDOWS}
    OnlineVersionsFile := TFPCustomHTTPClient.SimpleGet('https://groff.tuxproject.de/updates/versions.txt');
    reGroffVersion := TRegExpr.Create('groff-win ([\d\.]+) (.*)$');
    reGroffVersion.ModifierM := True;
    if reGroffVersion.Exec(OnlineVersionsFile) then
    begin
      edtOnlineGroffVersionWindows.Text := reGroffVersion.Match[1];
      latestGroffWindowsUrl := reGroffVersion.Match[2];

      // Compare the two versions - ours and the online one:
      GroffHelpers.VerStrCompare(reGroffStudioVersion.Match[1], FileVerInfo.VersionStrings.Values['FileVersion'], HasVersionUpdate);
      if HasVersionUpdate > 0 then
        MainStatusBar.Panels[2].Text := 'update ' + reGroffStudioVersion.Match[1] + ' available'
      else
        MainStatusBar.Panels[2].Text := IntToStr(HasVersionUpdate);
    end else MainStatusBar.Panels[2].Text := '';
    {$ELSE}
    // Non-Windows platforms won't need some of that.
    {$IFDEF DARWIN}
    // What's the latest available version?
    MainStatusBar.Panels[2].Text := '';
    try
      HTTPClient := TFPHTTPClient.Create(Nil);
      HTTPClient.OnGetSocketHandler := @GetSocketHandler;
      OnlineVersionsFile := HTTPClient.SimpleGet('https://groff.tuxproject.de/updates/versions.txt');

      reGroffStudioVersion := TRegExpr.Create('studio-macos ([\d\.]+) (.*)$');
      reGroffStudioVersion.ModifierM := True;
      if reGroffStudioVersion.Exec(OnlineVersionsFile) then
      begin
        // Compare the two versions - ours and the online one:
        GroffHelpers.VerStrCompare(reGroffStudioVersion.Match[1], FileVerInfo.VersionStrings.Values['FileVersion'], HasVersionUpdate);
        if HasVersionUpdate > 0 then
          MainStatusBar.Panels[2].Text := 'update ' + reGroffStudioVersion.Match[1] + ' available'
        else
          MainStatusBar.Panels[2].Text := IntToStr(HasVersionUpdate);
      end;
    finally
      HTTPClient.Free;
    end;
    {$ENDIF}

    edtOnlineGroffVersionWindows.Text := 'n/a';
    btnDownloadGroffWindows.Enabled := False;

  {$ENDIF}
  finally
    FileVerInfo.Free;
  end;

  // Loaded file display
  MainStatusBar.Panels[0].Text := '';

  // Groff build status
  MainStatusBar.Panels[1].Text := '';
end;

  if unsavedChanges then
  with Application do begin
    BoxStyle := MB_ICONQUESTION + MB_YESNO;
    Reply := MessageBox('Do you want to save the document first?', 'UnsavedChanges', BoxStyle);
    if Reply = IDYES then SynEdit1.Lines.SaveToFile(currentGroffFilePath);
  end;
end;

{$IFDEF DARWIN}
// Fix HTTPS on macOS:
procedure TMainForm.GetSocketHandler(Sender: TObject; const UseSSL: Boolean; out AHandler: TSocketHandler);
begin
  if UseSSL then begin
    AHandler := TSSLSocketHandler.Create;
    TSSLSocketHandler(AHandler).SSLType := stTLSv1_2;
  end else AHandler := TSocketHandler.Create;
end;
{$ENDIF}

end.