// table to hold all settings for this wizard
PluginSettings <- {
    Type = 0 // cbToolPlugin

    Name = _T("")
    Title = _T("")
    Version = _T("")
    Description = _T("")
    Author = _T("")
    Email = _T("")
    Website = _T("")
    ThanksTo = _T("")

    HasConfig = false
    HasMenu = false
    HasModuleMenu = false
    HasToolbar = false
}
WxVersion <- 0; //0 - wx 2.8, 1 -  wx 3.0, 2 -  wx 3.1

// -----------------------------------------------------------------------------
// init wizard
function BeginWizard()
{
    local wiz_type = Wizard.GetWizardType();

    local intro_msg = _("Welcome to the new Code::Blocks plugin wizard!\n") +
                      _("This wizard will guide you to create a new Code::Blocks plugin.\n\n");

    if (PLATFORM == PLATFORM_MSW)
    {
        intro_msg += _("\nVERY IMPORTANT NOTE:\n\n") +
                     _("Code::Blocks is built with the GNU GCC compiler and links to\nthe monolithic unicode wxWidgets DLL.\n") +
                     _("This means that you must have exactly this setup to be able to build the generated plugin.\n") +
                     _("You must also have defined two global variables:\n") +
                     _("   1. $(#cb) pointing to Code::Blocks base dir (where CodeBlocks.cbp is)\n") +
                     _("   2. $(#wx) or $(#wx3n) pointing to wxWidgets base directory\n\n\n");
    }

    intro_msg += _("When you're ready to proceed, please click \"Next\"...");

    Wizard.AddInfoPage(_T("PluginIntro"), intro_msg);
    Wizard.AddProjectPathPage();
    Wizard.AddPage(_T("PluginOptions"));
    Wizard.AddPage(_T("PluginInfo"));
    local options = _T("wxWidgets 2.8;wxWidgets 3.0;wxWidgets 3.1;wxWidgets 3.2;wxWidgets 3.3");
    if (PLATFORM != PLATFORM_MSW)
        options += _(";system default");

    // Select wxwidgets version.
    local wxVersionMsg = _("Please select the wxWidgets version you want to use for the default configuration.");
    Wizard.AddGenericSingleChoiceListPage(_T("wxVersionPage"), wxVersionMsg, options, WxVersion);
    Wizard.AddCompilerPage(_T(""), _T("gcc*"), true, false);
}

// -----------------------------------------------------------------------------
// entering plugin options page
function OnEnter_PluginOptions(fwd)
{
    // update options state
    OnClick_cmbPluginType();
}

// -----------------------------------------------------------------------------
// enable/disable available options based on selected plugin type
function OnClick_cmbPluginType()
{
    PluginSettings.Type = Wizard.GetComboboxSelection(_T("cmbPluginType"));

    local isTool = PluginSettings.Type == 1;
    local isMime = PluginSettings.Type == 2;
    local isWizard = PluginSettings.Type == 3;
    Wizard.EnableWindow(_T("chkHasConfig"), !isWizard);
    Wizard.EnableWindow(_T("chkHasMenu"), !isTool && !isMime && !isWizard);
    Wizard.EnableWindow(_T("chkHasModuleMenu"), !isTool && !isMime && !isWizard);
    Wizard.EnableWindow(_T("chkHasToolbar"), !isTool && !isMime && !isWizard);
}

// -----------------------------------------------------------------------------
// leaving plugin options page, validate entered values
function OnLeave_PluginOptions(fwd)
{
    if (fwd)
    {
        // read text values entered
        PluginSettings.Name = Wizard.GetTextControlValue(_T("txtPluginName"));
        PluginSettings.Type = Wizard.GetComboboxSelection(_T("cmbPluginType"));
        PluginSettings.HasConfig = Wizard.IsCheckboxChecked(_T("chkHasConfig"));
        PluginSettings.HasMenu = Wizard.IsCheckboxChecked(_T("chkHasMenu"));
        PluginSettings.HasModuleMenu = Wizard.IsCheckboxChecked(_T("chkHasModuleMenu"));
        PluginSettings.HasToolbar = Wizard.IsCheckboxChecked(_T("chkHasToolbar"));

        // check that essentials were filled in
        if (PluginSettings.Name.IsEmpty())
        {
            ShowWarning(_("You have to enter the plugin's name before you can proceed..."));
            return false;
        }
    }
    return true;
}

// -----------------------------------------------------------------------------
// entering plugin info page, set some default values
function OnEnter_PluginInfo(fwd)
{
    if (fwd)
    {
        // set the title same as the project title
        if (Wizard.GetTextControlValue(_T("txtTitle")).IsEmpty())
            Wizard.SetTextControlValue(_T("txtTitle"), Wizard.GetProjectTitle());
        if (Wizard.GetTextControlValue(_T("txtVersion")).IsEmpty())
            Wizard.SetTextControlValue(_T("txtVersion"), _T("0.1"));

        // load config
        Wizard.SetTextControlValue(_T("txtAuthor"), GetConfigManager().Read(_T("/cb_plugin_wizard/author"), _T("")));
        Wizard.SetTextControlValue(_T("txtEmail"), GetConfigManager().Read(_T("/cb_plugin_wizard/email"), _T("")));
        Wizard.SetTextControlValue(_T("txtWebsite"), GetConfigManager().Read(_T("/cb_plugin_wizard/website"), _T("")));
    }
}

// -----------------------------------------------------------------------------
// leaving plugin info page, validate entered values
function OnLeave_PluginInfo(fwd)
{
    if (fwd)
    {
        // read text values entered
        PluginSettings.Title = Wizard.GetTextControlValue(_T("txtTitle"));
        PluginSettings.Version = Wizard.GetTextControlValue(_T("txtVersion"));
        PluginSettings.Description = Wizard.GetTextControlValue(_T("txtDescription"));
        PluginSettings.Author = Wizard.GetTextControlValue(_T("txtAuthor"));
        PluginSettings.Email = Wizard.GetTextControlValue(_T("txtEmail"));
        PluginSettings.Website = Wizard.GetTextControlValue(_T("txtWebsite"));
        PluginSettings.ThanksTo = Wizard.GetTextControlValue(_T("txtThanksTo"));

        // check that essentials were filled in
        if (PluginSettings.Name.IsEmpty() ||
            PluginSettings.Version.IsEmpty())
        {
            ShowWarning(_("You have to fill the Title and Version fields before you can proceed..."));
            return false;
        }
        PluginSettings.Name = GetFixedProjectName(PluginSettings.Name);
    }

    // save config
    GetConfigManager().Write(_T("/cb_plugin_wizard/author"), PluginSettings.Author);
    GetConfigManager().Write(_T("/cb_plugin_wizard/email"), PluginSettings.Email);
    GetConfigManager().Write(_T("/cb_plugin_wizard/website"), PluginSettings.Website);
    return true;
}

////////////////////////////////////////////////////////////////////////////////
// wxWidgets' version page
////////////////////////////////////////////////////////////////////////////////

function OnEnter_wxVersionPage(fwd)
{
    if (fwd)
    {
        WxVersion = Wizard.GetListboxSelection(_T("GenericChoiceList"));
    }
    return true;
}

function OnLeave_wxVersionPage(fwd)
{
    if (fwd)
    {
        WxVersion = Wizard.GetListboxSelection(_T("GenericChoiceList"));
    }
    return true;
}

// -----------------------------------------------------------------------------
// each time, return a string of the form "filename.ext;contents"
// you can change the return string based on <file_index>
// return an empty string to denote that no more files are to be generated
function GetGeneratedFile(file_index)
{
    switch (file_index)
    {
        // header file
        case 0: return PluginSettings.Name + DOT_EXT_H + _T(";") + GenerateHeader();
        // source file
        case 1: return PluginSettings.Name + DOT_EXT_CPP + _T(";") + GenerateSource();
        // manifest
        case 2: return _T("manifest") + DOT_EXT_XML + _T(";") + GenerateManifest();
    }
    return _T(""); // no more generated files
}

// Return the path to the devel folder based on the wx version we are targeting
function GetBaseDevelPath(version)
{
    if (PLATFORM == PLATFORM_MSW)
    {
        if (version == 0)
            return _T("$(#cb)\\devel");
        else if (version == 1)
            return _T("$(#cb)\\devel30");
        else if (version == 2)
            return _T("$(#cb)\\devel31");
        else if (version == 3)
            return _T("$(#cb)\\devel32");
        else
            return _T("$(#cb)\\devel33");
    }
    else
    {
        if (version == 0)
            return _T("$(#cb)/devel");
        else if (version == 1)
            return _T("$(#cb)/devel30");
        else if (version == 2)
            return _T("$(#cb)/devel31");
        else if (version == 3)
            return _T("$(#cb)/devel32");
        else
            return _T("$(#cb)/devel33");
    };
}

// -----------------------------------------------------------------------------
// Setup the project options.
// We create three targets:
// * make_cbplugin:
//   This target creates a .cbplugin archive that can be distributed and installed in codeblocks via the plugin
//   manager. Uses the selected wx version.
// * to_codeblocks_wx28, to_codeblocks_wx30, to_codeblocks_wx31, to_codeblocks_wx32, to_codeblocks_wx33:
//   These targets copy the binary output and the resources directly to the "devel" and "devel3x" sub folder of your
//   codeblocks development folder provided by the $(#cb) global variable. This allows to debug the plugin easily.
//   If the debugging process is started, codeblocks starts gdb with "$(#cb)/devel/codeblocks" as host application
//   with the "debug" personality to create some kind of isolation from the working environment.
function SetupProject(project)
{
    SetupProjectBuildOptions(project);

    // Create the "default" target
    local target = project.GetBuildTarget(_T("default"));
    if (IsNull(target))
        target = project.AddBuildTarget(_T("default"));

    SetupTarget(target, true, WxVersion);

    local pluginSharedLibName = target.GetOutputFilename();
    if (0 == pluginSharedLibName.Find(_T("lib")))
    {
        local startIdx = 3;
        local endIdx = pluginSharedLibName.Length()-1;
        pluginSharedLibName = pluginSharedLibName.Mid(startIdx, endIdx);
        target.AddCommandsAfterBuild(_T("cp -f ") + target.GetOutputFilename() + _T(" ") +
                                pluginSharedLibName );
    }

    // Create plugin distribution file.
    target.AddCommandsAfterBuild(_T("zip -j9 ") + PluginSettings.Name + _T(".cbplugin ") +
                                pluginSharedLibName + _T(" ") +
                                PluginSettings.Name + _T(".zip"));

    // Create the "to_codeblocks_wx28" target
    local target28 = project.GetBuildTarget(_T("to_codeblocks_wx28"));
    if (IsNull(target28))
        target28 = project.AddBuildTarget(_T("to_codeblocks_wx28"));
    SetupTarget(target28, false, 0);

    // Create the "to_codeblocks_wx30" target
    local target30 = project.GetBuildTarget(_T("to_codeblocks_wx30"));
    if (IsNull(target30))
        target30 = project.AddBuildTarget(_T("to_codeblocks_wx30"));
    SetupTarget(target30, false, 1);

    // Create the "to_codeblocks_wx31" target
    local target31 = project.GetBuildTarget(_T("to_codeblocks_wx31"));
    if (IsNull(target31))
        target31 = project.AddBuildTarget(_T("to_codeblocks_wx31"));
    SetupTarget(target31, false, 2);

    // Create the "to_codeblocks_wx32" target
    local target32 = project.GetBuildTarget(_T("to_codeblocks_wx32"));
    if (IsNull(target32))
        target32 = project.AddBuildTarget(_T("to_codeblocks_wx32"));
    SetupTarget(target32, false, 3);

    // Create the "to_codeblocks_wx33" target
    local target33 = project.GetBuildTarget(_T("to_codeblocks_wx33"));
    if (IsNull(target33))
        target33 = project.AddBuildTarget(_T("to_codeblocks_wx33"));
    SetupTarget(target33, false, 4);

    // Add files to the targets, they are not added for some reason.
    for (local i = 0; i < project.GetFilesCount(); i++)
        project.GetFile(i).AddBuildTarget(target28.GetTitle());
    for (local i = 0; i < project.GetFilesCount(); i++)
        project.GetFile(i).AddBuildTarget(target30.GetTitle());
    for (local i = 0; i < project.GetFilesCount(); i++)
        project.GetFile(i).AddBuildTarget(target31.GetTitle());
    for (local i = 0; i < project.GetFilesCount(); i++)
        project.GetFile(i).AddBuildTarget(target32.GetTitle());
    for (local i = 0; i < project.GetFilesCount(); i++)
        project.GetFile(i).AddBuildTarget(target33.GetTitle());

    // Merge all targets in a single virtual target, so the user can rebuild everything at once.
    local virtualTargets = wxArrayString();
    virtualTargets.Add(target.GetTitle(), 1);
    virtualTargets.Add(target28.GetTitle(), 1);
    virtualTargets.Add(target30.GetTitle(), 1);
    virtualTargets.Add(target31.GetTitle(), 1);
    virtualTargets.Add(target32.GetTitle(), 1);
    virtualTargets.Add(target33.GetTitle(), 1);
    project.DefineVirtualBuildTarget(_T("All"), virtualTargets);

    return true;
}

function SetupProjectBuildOptions(project)
{
   if (PLATFORM == PLATFORM_MSW)
    {
        project.AddCompilerOption(_T("-DBUILDING_PLUGIN"));
        project.AddCompilerOption(_T("-DHAVE_W32API_H"));
        project.AddCompilerOption(_T("-D__WXMSW__"));
        project.AddCompilerOption(_T("-DWXUSINGDLL"));
        project.AddCompilerOption(_T("-DcbDEBUG"));
        project.AddCompilerOption(_T("-DCB_PRECOMP"));
        project.AddCompilerOption(_T("-DWX_PRECOMP"));
        project.AddCompilerOption(_T("-DwxUSE_UNICODE"));
        project.AddCompilerOption(_T("-pipe"));
        project.AddCompilerOption(_T("-mthreads"));
        project.AddCompilerOption(_T("-fmessage-length=0"));
        project.AddCompilerOption(_T("-fexceptions"));
        project.AddCompilerOption(_T("-Winvalid-pch"));
        project.AddCompilerOption(_T("-std=gnu++11"));

        project.AddLinkerOption(_T("-mthreads"));

        project.AddIncludeDir(_T("$(#cb)\\include"));
        project.AddIncludeDir(_T("$(#cb)\\sdk\\wxscintilla\\include"));
        project.AddIncludeDir(_T("$(#cb)\\include\\tinyxml"));

    }
    else
    {
        project.AddCompilerOption(_T("-std=c++11"));
        project.AddCompilerOption(_T("-fPIC"));
        project.AddLinkerOption(_T("-Wl,--no-undefined"));
    }
}

// Setup all target common parameters for the targets
function SetupTarget(target, isSystemWide, targetWxVersion)
{
    if (IsNull(target))
        return false;

    target.SetTargetType(ttDynamicLib);
    target.SetOutputFilename(PluginSettings.Name);
    target.SetCreateDefFile(false);
    target.SetCreateStaticLib(false);
    target.SetObjectOutput(_T(".objs/") + target.GetTitle());

    if (PLATFORM == PLATFORM_MSW)
    {
        target.SetHostApplication(GetBaseDevelPath(targetWxVersion) + _T("\\codeblocks") + DOT_EXT_EXECUTABLE);

        if (targetWxVersion == 0)
        {
            target.AddIncludeDir(_T("$(#wx.include)"));
            target.AddIncludeDir(_T("$(#wx.lib)\\gcc_dll\\mswu"));

            target.AddLinkLib(_T("wxmsw28u"));
            target.AddLibDir(_T("$(#wx.lib)\\gcc_dll"));
        }
        else if (targetWxVersion == 1)
        {
            target.AddIncludeDir(_T("$(#wx30.include)"));
            target.AddIncludeDir(_T("$(#wx30.lib)\\gcc_dll\\mswu"));

            target.AddLinkLib(_T("wxmsw30u"));
            target.AddLibDir(_T("$(#wx30.lib)\\gcc_dll"));
        }
        else if (targetWxVersion == 2)
        {
            target.AddIncludeDir(_T("$(#wx31.include)"));
            target.AddIncludeDir(_T("$(#wx31.lib)\\gcc_dll\\mswu"));

            target.AddLinkLib(_T("wxmsw31u"));
            target.AddLibDir(_T("$(#wx31.lib)\\gcc_dll"));
        }
        else if (targetWxVersion == 3)
        {
            target.AddIncludeDir(_T("$(#wx32.include)"));
            target.AddIncludeDir(_T("$(#wx32.lib)\\gcc_dll\\mswu"));

            target.AddLinkLib(_T("wxmsw32u"));
            target.AddLibDir(_T("$(#wx32.lib)\\gcc_dll"));
        }
        else
        {
            target.AddIncludeDir(_T("$(#wx33.include)"));
            target.AddIncludeDir(_T("$(#wx33.lib)\\gcc_dll\\mswu"));

            target.AddLinkLib(_T("wxmsw33u"));
            target.AddLibDir(_T("$(#wx33.lib)\\gcc_dll"));
        }

        target.AddLibDir(GetBaseDevelPath(targetWxVersion));
        target.AddLinkLib(_T("codeblocks"));
    }
    else
    {
        if (isSystemWide)
        {
            target.AddCompilerOption(_T("`pkg-config --cflags codeblocks`"));
            target.AddLinkerOption(_T("`pkg-config --libs codeblocks`"));
        }
        else
        {
            local develPath = GetBaseDevelPath(targetWxVersion);
            target.SetHostApplication(develPath + _T("/codeblocks") + DOT_EXT_EXECUTABLE);
            target.AddLibDir(develPath);
            target.SetWorkingDir(develPath);

            target.AddLinkLib(_T("codeblocks"));
            target.AddIncludeDir(_T("$(#cb)/include"));
            target.AddIncludeDir(_T("$(#cb)/sdk/wxscintilla/include"));
            target.AddIncludeDir(_T("$(#cb)/include/tinyxml"));
        }

        local WxVersionFlag;
        if (targetWxVersion == 0)
            WxVersionFlag = _T(" --version=2.8");
        else if (targetWxVersion == 1)
            WxVersionFlag = _T(" --version=3.0");
        else if (targetWxVersion == 2)
            WxVersionFlag = _T(" --version=3.1");
        else if (targetWxVersion == 3)
            WxVersionFlag = _T(" --version=3.2");
        else if (targetWxVersion == 4)
            WxVersionFlag = _T(" --version=3.3");
        else
            WxVersionFlag = _T("");

        target.AddCompilerOption(_T("`wx-config --cflags ") + WxVersionFlag + _T("`"));
        target.AddLinkerOption(_T("`wx-config --libs ") + WxVersionFlag + _T("`"));
    }

    local zipFilePath;
    if (isSystemWide)
        zipFilePath = PluginSettings.Name + _T(".zip");
    else
    {
        // "to_codeblocks" has to copy multiple files to the $(#cb)\devel folder. This is a platform specific process
        local basePath = GetBaseDevelPath(targetWxVersion) + _T("/share/codeblocks/");
        zipFilePath = basePath + PluginSettings.Name + _T(".zip");

        target.SetOutputFilename(basePath + _T("plugins/") + PluginSettings.Name);

        local executionParameters = _T("--debug-log --multiple-instance --no-splash-screen --verbose -p debug");
        if (PLATFORM == PLATFORM_MSW)
            executionParameters += _T(" --no-dde --no-check-associations ");
        else
            executionParameters += _T(" --no-ipc ");

        target.SetExecutionParameters(executionParameters);
    }

    target.AddCommandsAfterBuild(_T("zip -j9 ") + zipFilePath + _T(" manifest") + DOT_EXT_XML);
    target.SetAlwaysRunPostBuildSteps (true)
    DebugSymbolsOn(target, Wizard.GetCompilerID());

    return true;
}



////////////////////////////////////////////////////////////////////////////////
//
// locally defined functions below
//
////////////////////////////////////////////////////////////////////////////////



// -----------------------------------------------------------------------------
// return the header contents string
function GenerateHeader()
{
    local path = Wizard.FindTemplateFile(GetTemplateFile(DOT_EXT_H));
    local buffer = IO.ReadFileContents(path);

    // create header guard word
    local guard = PluginSettings.Name + DOT_EXT_H + _T("_INCLUDED");
    guard.MakeUpper();
    guard.Replace(_T(" "), _T("_"));
    guard.Replace(_T("."), _T("_"));
    buffer.Replace(_T("[GUARD_WORD]"), guard);

    return SubstituteMacros(buffer);
}

// -----------------------------------------------------------------------------
// return the implementation contents string
function GenerateSource()
{
    local path = Wizard.FindTemplateFile(GetTemplateFile(DOT_EXT_CPP));
    local buffer = IO.ReadFileContents(path);

    return SubstituteMacros(buffer);
}

// -----------------------------------------------------------------------------
// return the manifest contents string
function GenerateManifest()
{
    local path = Wizard.FindTemplateFile(_T("plugins/templates/manifest_template.xml"));
    local buffer = IO.ReadFileContents(path);

    return SubstituteMacros(buffer);
}

// -----------------------------------------------------------------------------
// return the template's filename, appending <dot_ext> as an extension (must include the dot)
function GetTemplateFile(dot_ext)
{
    local template_file = _T("");
    switch (PluginSettings.Type)
    {
        // generic plugin
        case 0: template_file = _T("plugins/templates/generic_template") + dot_ext; break;
        // tool plugin
        case 1: template_file = _T("plugins/templates/tool_template") + dot_ext; break;
        // mime plugin
        case 2: template_file = _T("plugins/templates/mime_template") + dot_ext; break;
        // wizard plugin
        case 3: template_file = _T("plugins/templates/wizard_template") + dot_ext; break;

        default: break; // error
    }
    return template_file;
}

// -----------------------------------------------------------------------------
// substitute all plugin macros in <buffer>
function SubstituteMacros(buffer)
{
    // handle [IF] / [ENDIF] pairs
    buffer = HandleDirective(buffer, _T("HAS_CONFIGURE"), PluginSettings.HasConfig);
    buffer = HandleDirective(buffer, _T("HAS_MENU"), PluginSettings.HasMenu);
    buffer = HandleDirective(buffer, _T("HAS_MODULE_MENU"), PluginSettings.HasModuleMenu);
    buffer = HandleDirective(buffer, _T("HAS_TOOLBAR"), PluginSettings.HasToolbar);
    buffer = HandleDirective(buffer, _T("NEED_EVENTS"), PluginSettings.HasMenu ||
                                                        PluginSettings.HasModuleMenu ||
                                                        PluginSettings.HasToolbar);

    // macros substitution
    buffer.Replace(_T("[PLUGIN_SDK_VERSION_MAJOR]"), _T("") + PLUGIN_SDK_VERSION_MAJOR);
    buffer.Replace(_T("[PLUGIN_SDK_VERSION_MINOR]"), _T("") + PLUGIN_SDK_VERSION_MINOR);
    buffer.Replace(_T("[PLUGIN_SDK_VERSION_RELEASE]"), _T("") + PLUGIN_SDK_VERSION_RELEASE);
    buffer.Replace(_T("[PLUGIN_NAME]"), PluginSettings.Name);
    buffer.Replace(_T("[PLUGIN_TITLE]"), PluginSettings.Title);
    buffer.Replace(_T("[PLUGIN_VERSION]"), PluginSettings.Version);
    buffer.Replace(_T("[PLUGIN_DESCRIPTION]"), PluginSettings.Description);
    buffer.Replace(_T("[PROJECT_NAME]"), Wizard.GetProjectName());
    buffer.Replace(_T("[AUTHOR_NAME]"), PluginSettings.Author);
    buffer.Replace(_T("[AUTHOR_EMAIL]"), PluginSettings.Email);
    buffer.Replace(_T("[AUTHOR_WWW]"), PluginSettings.Website);
    buffer.Replace(_T("[THANKS_TO]"), PluginSettings.ThanksTo);
    buffer.Replace(_T("[HEADER_FILENAME]"), PluginSettings.Name + DOT_EXT_H);
    buffer.Replace(_T("[NOW]"), ReplaceMacros(_T("$(TODAY)")));

    return buffer;
}

// -----------------------------------------------------------------------------
// if <enabled> is true, removes the [IF <directive>] and [ENDIF <directive>]
// macros.
// if <enabled> is false, removes everything enclosed by the [IF <directive>]
// and [ENDIF <directive>] macros (including them).
function HandleDirective(buffer, directive, enabled)
{
    local dir_if = _T("[IF ") + directive + _T("]");
    local dir_endif = _T("[ENDIF ") + directive + _T("]");

    local findStart = buffer.Find(dir_if);
    if (findStart == -1)
        return buffer;

    local findEnd = buffer.Find(dir_endif);
    if (findEnd == -1 || findEnd <= findStart)
        return buffer;

    // look for [ELSE]
    local block = buffer.Mid(findStart, findEnd - findStart);
    local findElse = block.Find(_T("[ELSE]")); // findElse is in "local scope", i.e. offset from findStart

    if (!enabled)
    {
        if (findElse == -1)
        {
            // remove whole section
            buffer.Remove(findStart, (findEnd - findStart) + dir_endif.Length());
        }
        else
        {
            // remove [ENDIF]
            buffer.Remove(findEnd, dir_endif.Length());
            // remove from [IF] to [ELSE] (including)
            buffer.Remove(findStart, findElse + 6); // 6 is the [ELSE] size
        }
    }
    else
    {
        if (findElse == -1)
        {
            // just remove the directives
            // we must remove the [ENDIF] first because if we removed the [IF] it would
            // render the findEnd index invalid!
            buffer.Remove(findEnd, dir_endif.Length());
            buffer.Remove(findStart, dir_if.Length());
        }
        else
        {
            // remove from [ELSE] to [ENDIF]
            local start = findStart + findElse;
            buffer.Remove(start, (findEnd - start) + dir_endif.Length());
            // remove from [IF]
            buffer.Remove(findStart, dir_if.Length());
        }
    }

    return buffer;
}
