icinga-powershell-framework/lib/core/icingaagent/misc/Start-IcingaAgentInstallWizard.psm1

function Start-IcingaAgentInstallWizard()
{
    param(
        [string]$Hostname,
        $AutoUseFQDN,
        $AutoUseHostname,
        $LowerCase,
        $UpperCase,
        $AddDirectorGlobal           = $null,
        $AddGlobalTemplates          = $null,
        [string]$PackageSource,
        [string]$AgentVersion,
        $AllowVersionChanges,
        $UpdateAgent                 = $null,
        $AddFirewallRule             = $null,
        $AcceptConnections           = $null,
        [array]$Endpoints            = @(),
        [array]$EndpointConnections  = @(),
        $ConvertEndpointIPConfig     = $null,
        [string]$ParentZone,
        [array]$GlobalZones          = $null,
        [string]$CAEndpoint,
        $CAPort                      = $null,
        [string]$Ticket,
        $EmptyTicket,
        [string]$CAFile              = $null,
        $EmptyCA                     = $null,
        [switch]$RunInstaller,
        [switch]$Reconfigure,
        [string]$ServiceUser,
        [securestring]$ServicePass   = $null,
        $InstallFrameworkService     = $null,
        $FrameworkServiceUrl         = $null,
        $ServiceDirectory            = $null,
        $ServiceBin                  = $null,
        $UseDirectorSelfService      = $null,
        [bool]$SkipDirectorQuestion  = $FALSE,
        [string]$DirectorUrl,
        [string]$SelfServiceAPIKey   = $null,
        $OverrideDirectorVars        = $null,
        $InstallFrameworkPlugins     = $null,
        $PluginsUrl                  = $null
    );

    [array]$InstallerArguments = @();
    [array]$GlobalZoneConfig   = @();

    if ($SkipDirectorQuestion -eq $FALSE) {
        if ($null -eq $UseDirectorSelfService) {
            if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you want to use the Icinga Director Self-Service API?' -Default 'y').result -eq 1) {
                $UseDirectorSelfService = $TRUE;
            } else {
                $UseDirectorSelfService = $FALSE;
                $InstallerArguments += '-UseDirectorSelfService 0';
            }
        }
        if ($UseDirectorSelfService) {

            $InstallerArguments += '-UseDirectorSelfService 1';
            $DirectorArgs = Start-IcingaAgentDirectorWizard `
                -DirectorUrl $DirectorUrl `
                -SelfServiceAPIKey $SelfServiceAPIKey `
                -OverrideDirectorVars $OverrideDirectorVars `
                -RunInstaller $RunInstaller;

            $Result              = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'DirectorUrl' -Value $DirectorUrl -InstallerArguments $InstallerArguments;
            $DirectorUrl         = $Result.Value;
            $InstallerArguments  = $Result.Args;
            $Result              = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'SelfServiceAPIKey' -Value $SelfServiceAPIKey -InstallerArguments $InstallerArguments -Default $null;
            if ([string]::IsNullOrEmpty($Result.Value) -eq $FALSE) {
                $SelfServiceAPIKey   = $Result.Value;
                $InstallerArguments  = $Result.Args;
            }
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'Ticket' -Value $Ticket -InstallerArguments $InstallerArguments;
            $Ticket               = $Result.Value;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'PackageSource' -Value $PackageSource -InstallerArguments $InstallerArguments;
            $PackageSource        = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'AgentVersion' -Value $AgentVersion -InstallerArguments $InstallerArguments;
            $AgentVersion         = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'CAPort' -Value $CAPort -InstallerArguments $InstallerArguments;
            $CAPort               = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'AllowVersionChanges' -Value $AllowVersionChanges -InstallerArguments $InstallerArguments;
            $AllowVersionChanges  = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'GlobalZones' -Value $GlobalZones -InstallerArguments $InstallerArguments;
            $GlobalZones          = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'ParentZone' -Value $ParentZone -InstallerArguments $InstallerArguments;
            $ParentZone           = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'CAEndpoint' -Value $CAEndpoint -InstallerArguments $InstallerArguments;
            $CAEndpoint           = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'Endpoints' -Value $Endpoints -InstallerArguments $InstallerArguments;
            $Endpoints            = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'AddFirewallRule' -Value $AddFirewallRule -InstallerArguments $InstallerArguments;
            $AddFirewallRule      = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'AcceptConnections' -Value $AcceptConnections -InstallerArguments $InstallerArguments;
            $AcceptConnections    = $Result.Value;
            $InstallerArguments   = $Result.Args;       
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'ServiceUser' -Value $ServiceUser -InstallerArguments $InstallerArguments;
            $ServiceUser          = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'UpdateAgent' -Value $UpdateAgent -InstallerArguments $InstallerArguments;
            $UpdateAgent          = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'AddDirectorGlobal' -Value $AddDirectorGlobal -InstallerArguments $InstallerArguments;
            $AddDirectorGlobal    = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'AddGlobalTemplates' -Value $AddGlobalTemplates -InstallerArguments $InstallerArguments;
            $AddGlobalTemplates   = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'LowerCase' -Value $LowerCase -Default $FALSE -InstallerArguments $InstallerArguments;
            $LowerCase            = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'UpperCase' -Value $UpperCase -Default $FALSE -InstallerArguments $InstallerArguments;
            $UpperCase            = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'AutoUseFQDN' -Value $AutoUseFQDN -Default $FALSE -InstallerArguments $InstallerArguments;
            $AutoUseFQDN          = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'AutoUseHostname' -Value $AutoUseHostname -Default $FALSE -InstallerArguments $InstallerArguments;
            $AutoUseHostname      = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'EndpointConnections' -Value $EndpointConnections -InstallerArguments $InstallerArguments;
            $EndpointConnections  = $Result.Value;
            $InstallerArguments   = $Result.Args;
            $Result               = Set-IcingaWizardArgument -DirectorArgs $DirectorArgs -WizardArg 'OverrideDirectorVars' -Value $OverrideDirectorVars -InstallerArguments $InstallerArguments;
            $OverrideDirectorVars = $Result.Value;
            $InstallerArguments   = $Result.Args;
        }
    }

    # 'latest' is deprecated starting with 1.1.0
    if ($AgentVersion -eq 'latest') {
        $AgentVersion = 'release';
        Write-IcingaConsoleWarning -Message 'The value "latest" for the argmument "AgentVersion" is deprecated. Please use the value "release" in the future!';
    }

    if ([string]::IsNullOrEmpty($Hostname) -And $null -eq $AutoUseFQDN -And $null -eq $AutoUseHostname) {
        if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you want to specify the hostname manually?' -Default 'n').result -eq 1) {
            $HostFQDN     = Get-IcingaHostname -AutoUseFQDN 1 -AutoUseHostname 0 -LowerCase 1 -UpperCase 0;
            if ((Get-IcingaAgentInstallerAnswerInput -Prompt ([string]::Format('Do you want to automatically fetch the hostname as FQDN? (Result: "{0}")', $HostFQDN)) -Default 'y').result -eq 1) {
                $InstallerArguments += '-AutoUseFQDN 1';
                $InstallerArguments += '-AutoUseHostname 0';
                $AutoUseFQDN         = $TRUE;
                $AutoUseHostname     = $FALSE;
            } else {
                $InstallerArguments += '-AutoUseFQDN 0';
                $InstallerArguments += '-AutoUseHostname 1';
                $AutoUseFQDN         = $FALSE;
                $AutoUseHostname     = $TRUE;
            }
            $Hostname = Get-IcingaHostname -AutoUseFQDN $AutoUseFQDN -AutoUseHostname $AutoUseHostname -LowerCase 1 -UpperCase 0;
            if ((Get-IcingaAgentInstallerAnswerInput -Prompt ([string]::Format('Do you want to convert the hostname into lower case characters? (Result: "{0}")', $Hostname)) -Default 'y').result -eq 1) {
                $InstallerArguments += '-LowerCase 1';
                $InstallerArguments += '-UpperCase 0';
                $LowerCase = $TRUE;
                $UpperCase = $FALSE;
            } else {
                $Hostname = Get-IcingaHostname -AutoUseFQDN $AutoUseFQDN -AutoUseHostname $AutoUseHostname -LowerCase 0 -UpperCase 1;
                if ((Get-IcingaAgentInstallerAnswerInput -Prompt ([string]::Format('Do you want to convert the hostname into upper case characters? (Result: "{0}")', $Hostname)) -Default 'y').result -eq 1) {
                    $InstallerArguments += '-LowerCase 0';
                    $InstallerArguments += '-UpperCase 1';
                    $LowerCase = $FALSE;
                    $UpperCase = $TRUE;
                } else {
                    $InstallerArguments += '-LowerCase 0';
                    $InstallerArguments += '-UpperCase 0';
                    $LowerCase = $FALSE;
                    $UpperCase = $FALSE;
                }
            }
            $Hostname = Get-IcingaHostname -AutoUseFQDN $AutoUseFQDN -AutoUseHostname $AutoUseHostname -LowerCase $LowerCase -UpperCase $UpperCase;
        } else {
            $Hostname = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please specify the hostname to use' -Default 'v').answer;
        }
    } else {
        if ($AutoUseFQDN -Or $AutoUseHostname) {
            $Hostname = Get-IcingaHostname -AutoUseFQDN $AutoUseFQDN -AutoUseHostname $AutoUseHostname -LowerCase $LowerCase -UpperCase $UpperCase;
        }
    }

    Write-IcingaConsoleNotice ([string]::Format('Using hostname "{0}" for the Icinga Agent configuration', $Hostname));

    $IcingaAgent = Get-IcingaAgentInstallation;
    if ($IcingaAgent.Installed -eq $FALSE) {
        if ([string]::IsNullOrEmpty($PackageSource)) {
            if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you want to install the Icinga Agent now?' -Default 'y').result -eq 1) {
                if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you want to use a different package source? (Defaults: "https://packages.icinga.com/windows/")' -Default 'n').result -eq 0) {
                    $PackageSource = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please specify your package source' -Default 'v').answer;
                    $InstallerArguments += "-PackageSource '$PackageSource'";
                } else {
                    $PackageSource = 'https://packages.icinga.com/windows/'
                    $InstallerArguments += "-PackageSource '$PackageSource'";
                }

                Write-IcingaConsoleNotice ([string]::Format('Using package source "{0}" for the Icinga Agent package', $PackageSource));
                $AllowVersionChanges = $TRUE;
                $InstallerArguments += '-AllowVersionChanges 1';

                if ([string]::IsNullOrEmpty($AgentVersion)) {
                    $AgentVersion = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please specify the version you wish to install ("release", "snapshot" or a specific version like "2.11.3")' -Default 'v' -DefaultInput 'release').answer;
                    $InstallerArguments += "-AgentVersion '$AgentVersion'";
    
                    Write-IcingaConsoleNotice ([string]::Format('Installing Icinga version: "{0}"', $AgentVersion));
                }
            } else {
                $AllowVersionChanges = $FALSE;
                $InstallerArguments += '-AllowVersionChanges 0';
                $InstallerArguments += "-AgentVersion '$AgentVersion'";
                $AgentVersion        = '';
            }
        }
    } else {
        if ($null -eq $UpdateAgent) {
            if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'The Icinga Agent is already installed. Would you like to update it?' -Default 'y').result -eq 1) {
                $UpdateAgent = 1;
                $AllowVersionChanges = $TRUE;
                $InstallerArguments += '-AllowVersionChanges 1';
            } else {
                $UpdateAgent = 0;
                $AllowVersionChanges = $FALSE;
                $InstallerArguments += '-AllowVersionChanges 0';
            }
            $InstallerArguments += "-UpdateAgent $UpdateAgent";
        }

        if ($UpdateAgent -eq 1) {
            if ([string]::IsNullOrEmpty($AgentVersion)) {
                $AgentVersion = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please specify the version you wish to install ("release", "snapshot" or a specific version like "2.11.3")' -Default 'v' -DefaultInput 'release').answer;
                $InstallerArguments += "-AgentVersion '$AgentVersion'";

                Write-IcingaConsoleNotice ([string]::Format('Updating/Downgrading Icinga 2 Agent to version: "{0}"', $AgentVersion));
            }

            if ([string]::IsNullOrEmpty($PackageSource)) {
                if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you want to use a different package source then "https://packages.icinga.com/windows/" ?' -Default 'n').result -eq 0) {
                    $PackageSource = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please specify your package source' -Default 'v').answer;
                    $InstallerArguments += "-PackageSource '$PackageSource'";
                } else {
                    $PackageSource = 'https://packages.icinga.com/windows/'
                    $InstallerArguments += "-PackageSource '$PackageSource'";
                }
            }
        }
    }

    if ($Endpoints.Count -eq 0) {
        $ArrayString = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please specify the parent node(s) separated by "," (Examples: "master1, master2" or "master1.example.com, master2.example.com")' -Default 'v').answer;
        $Endpoints = ($ArrayString.Replace(' ', '')).Split(',');
        $InstallerArguments += ("-Endpoints " + ([string]::Join(',', $Endpoints)));
    }

    if ($null -eq $CAPort) {
        if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Are you using another port than 5665 for Icinga communication?' -Default 'n').result -eq 0) {
            $CAPort = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please enter the port for Icinga communication' -Default 'v' -DefaultInput '5665').answer;
            $InstallerArguments += "-CAPort $CAPort";
        } else {
            $InstallerArguments += "-CAPort 5665";
            $CAPort = 5665;
        }
    }

    [bool]$CanConnectToParent = $FALSE;

    if ($null -eq $AcceptConnections) {
        if ((Get-IcingaAgentInstallerAnswerInput -Prompt "Is this Agent able to connect to its parent node(s)?" -Default 'y').result -eq 1) {
            $CanConnectToParent = $TRUE;
            $AcceptConnections = 0;
            $InstallerArguments += ("-AcceptConnections 0");
        } else {
            $AcceptConnections = 1;
            $InstallerArguments += ("-AcceptConnections 1");
        }
    } else {
        if ((Test-IcingaWizardArgument -Argument 'AcceptConnections') -eq $FALSE) {
            $InstallerArguments += ([string]::Format('-AcceptConnections {0}', [int]$AcceptConnections));
        }

        if ($AcceptConnections -eq $FALSE) {
            $CanConnectToParent = $TRUE;
        }
    }

    if ($null -eq $AddFirewallRule -And $CanConnectToParent -eq $FALSE) {
        if ((Get-IcingaAgentInstallerAnswerInput -Prompt ([string]::Format('Do you want to open the Windows Firewall for incoming traffic on Port "{0}"?', $CAPort)) -Default 'y').result -eq 1) {
            $InstallerArguments += "-AddFirewallRule 1";
            $AddFirewallRule = $TRUE;
        } else {
            $InstallerArguments += "-AddFirewallRule 0";
            $AddFirewallRule = $FALSE;
        }
    } else {
        if ($CanConnectToParent -eq $TRUE) {
            $InstallerArguments += "-AddFirewallRule 0";
            $AddFirewallRule = $FALSE;
        }
    }

    if ($null -eq $ConvertEndpointIPConfig -And $CanConnectToParent -eq $TRUE) {
        if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you want to convert parent node(s) connection data to IP adresses?' -Default 'y').result -eq 1) {
            $InstallerArguments     += "-ConvertEndpointIPConfig 1";
            $ConvertEndpointIPConfig = $TRUE;
            if ($EndpointConnections.Count -eq 0) {
                $EndpointsConversion = Convert-IcingaEndpointsToIPv4 -NetworkConfig $Endpoints.Split(',');
            } else {
                $EndpointsConversion = Convert-IcingaEndpointsToIPv4 -NetworkConfig $EndpointConnections.Split(',');
            }
            if ($EndpointsConversion.HasErrors) {
                Write-IcingaConsoleWarning -Message 'Not all of your endpoint connection data could be resolved. These endpoints were dropped: {0}' -Objects ([string]::Join(', ', $EndpointsConversion.Unresolved));
            }
            $EndpointConnections     = $EndpointsConversion.Network;
        } else {
            $InstallerArguments     += "-ConvertEndpointIPConfig 0";
            $ConvertEndpointIPConfig = $FALSE;
        }
    }

    if ($EndpointConnections.Count -eq 0 -And $AcceptConnections -eq 0) {
        $NetworkDefault = '';
        foreach ($Endpoint in $Endpoints) {
            $NetworkDefault += [string]::Format('[{0}]:{1},', $Endpoint, $CAPort);
        }
        if ([string]::IsNullOrEmpty($NetworkDefault) -eq $FALSE) {
            $NetworkDefault = $NetworkDefault.Substring(0, $NetworkDefault.Length - 1);
        }
        $ArrayString = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please specify the network destinations this Agent will connect to separated by "," (Examples: 192.168.0.1, [192.168.0.2]:5665, [icinga2.example.com]:5665)' -Default 'v' -DefaultInput $NetworkDefault).answer;
        $EndpointConnections = ($ArrayString.Replace(' ', '')).Split(',');

        if ($ConvertEndpointIPConfig) {
            $EndpointsConversion = Convert-IcingaEndpointsToIPv4 -NetworkConfig $EndpointConnections.Split(',');
            if ($EndpointsConversion.HasErrors -eq $FALSE) {
                $EndpointConnections = $EndpointsConversion.Network;
            }
        }
        $InstallerArguments += ("-EndpointConnections " + ([string]::Join(',', $EndpointConnections)));
    }

    if ([string]::IsNullOrEmpty($ParentZone)) {
        $ParentZone = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please specify the parent zone this Agent will connect to' -Default 'v' -DefaultInput 'master').answer;
        $InstallerArguments += "-ParentZone $ParentZone";
    }

    if ($null -eq $AddDirectorGlobal) {
        if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you want to add the global zone "director-global"?' -Default 'y').result -eq 1) {
            $AddDirectorGlobal = $TRUE;
            $InstallerArguments += ("-AddDirectorGlobal 1");
        } else {
            $AddDirectorGlobal = $FALSE;
            $InstallerArguments += ("-AddDirectorGlobal 0");
        }
    }

    if ($AddDirectorGlobal) {
        $GlobalZoneConfig += 'director-global';
    }

    if ($null -eq $AddGlobalTemplates) {
        if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you want to add the global zone "global-templates"?' -Default 'y').result -eq 1) {
            $AddGlobalTemplates = $TRUE;
            $InstallerArguments += ("-AddGlobalTemplates 1");
        } else {
            $AddGlobalTemplates = $FALSE;
            $InstallerArguments += ("-AddGlobalTemplates 0");
        }
    }

    if ($AddGlobalTemplates) {
        $GlobalZoneConfig += 'global-templates';
    }

    if ($null -eq $GlobalZones) {
        if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you want to add custom global zones?' -Default 'n').result -eq 0) {
            $ArrayString = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please specify your additional zones seperated by "," (Example: "global-zone1, global-zone2")' -Default 'v').answer;
            if ([string]::IsNullOrEmpty($ArrayString) -eq $FALSE) {
                $GlobalZones = ($ArrayString.Replace(' ', '')).Split(',')
                $GlobalZoneConfig += $GlobalZones;
                $InstallerArguments += ("-GlobalZones " + ([string]::Join(',', $GlobalZones)));
            } else {
                $GlobalZones = @(); 
                $InstallerArguments += ("-GlobalZones @()");
            }
        } else {
            $GlobalZones = @();
            $InstallerArguments += ("-GlobalZones @()");
        }
    } else {
        $GlobalZoneConfig += $GlobalZones;
    }

    if ($CanConnectToParent) {
        if ([string]::IsNullOrEmpty($CAEndpoint)) {
            $CAEndpoint = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please enter the connection data of the parent node that handles certificate requests' -Default 'v' -DefaultInput (Get-IPConfigFromString $EndpointConnections[0]).address).answer;
            $InstallerArguments += "-CAEndpoint $CAEndpoint";
        }
        if ([string]::IsNullOrEmpty($Ticket) -And $null -eq $EmptyTicket) {
            if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you have a PKI Ticket to sign your certificate request?' -Default 'y').result -eq 1) {
                $Ticket = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please enter your PKI Ticket' -Default 'v').answer;
                if ([string]::IsNullOrEmpty($Ticket)) {
                    $InstallerArguments += "-EmptyTicket 1"
                } else {
                    $InstallerArguments += "-EmptyTicket 0"
                }
                $InstallerArguments += "-Ticket '$Ticket'";
            } else {
                $InstallerArguments += "-Ticket ''";
                $InstallerArguments += "-EmptyTicket 1"
            }
        } else {
            if ([string]::IsNullOrEmpty($Ticket)) {
                $InstallerArguments += "-Ticket ''";
            } else {
                $InstallerArguments += "-Ticket '$Ticket'";
            }
            if ($null -eq $EmptyTicket) {
                $InstallerArguments += "-EmptyTicket 1"
            } else {
                $InstallerArguments += "-EmptyTicket $EmptyTicket"
            }
        }
    } else {
        if ([string]::IsNullOrEmpty($CAFile) -And $null -eq $EmptyCA) {
            if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Is your public Icinga 2 CA (ca.crt) available on a local, network or web share?' -Default 'y').result -eq 1) {
                $CAFile = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please provide the full path to your ca.crt file (Examples: "C:\icinga2\ca.crt", "https://icinga.example.com/ca.crt"' -Default 'v').answer;
                if ([string]::IsNullOrEmpty($CAFile)) {
                    $InstallerArguments += "-EmptyCA 1"
                } else {
                    $InstallerArguments += "-EmptyCA 0"
                }
                $InstallerArguments += "-CAFile '$CAFile'";
            } else {
                $InstallerArguments += "-CAFile ''";
                $InstallerArguments += "-EmptyCA 1";
                $EmptyCA             = $TRUE;
            }
        } else {
            if ([string]::IsNullOrEmpty($CAFile)) {
                $InstallerArguments += "-CAFile ''";
            } else {
                $InstallerArguments += "-CAFile '$CAFile'";
            }
            if ($null -eq $EmptyCA) {
                $InstallerArguments += "-EmptyCA 1"
            } else {
                $InstallerArguments += "-EmptyCA $EmptyCA"
            }
        }
    }

    if ([string]::IsNullOrEmpty($ServiceUser)) {
        if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you want to change the user of the Icinga Agent service? (Defaults: "NT Authority\NetworkService")' -Default 'n').result -eq 0) {
            $ServiceUser = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please enter a custom user for the Icinga Agent service' -Default 'v' -DefaultInput 'NT Authority\NetworkService').answer;
            $InstallerArguments += "-ServiceUser $ServiceUser";
            if ($null -eq $ServicePass) {
                if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Does your Icinga Agent service user require a password to login? (Not required for System users)' -Default 'y').result -eq 1) {
                    $ServicePass = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please enter the password for your service user' -Secure -Default 'v').answer;
                    $InstallerArguments += "-ServicePass $ServicePass";
                } else {
                    $ServicePass = '';
                    $InstallerArguments += "-ServicePass ''";
                }
            }
        } else {
            $InstallerArguments += "-ServiceUser 'NT Authority\NetworkService'";
            $ServiceUser = 'NT Authority\NetworkService';
        }
    }

    if ($null -eq $InstallFrameworkPlugins) {
        if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you want to install the Icinga PowerShell Plugins?' -Default 'y').result -eq 1) {
            $result = Install-IcingaFrameworkPlugins -PluginsUrl $PluginsUrl;
            $PluginsUrl = $result.PluginUrl;
            $InstallerArguments += "-InstallFrameworkPlugins 1";
            $InstallerArguments += "-PluginsUrl '$PluginsUrl'";
        } else {
            $InstallerArguments += "-InstallFrameworkPlugins 0";
        }
    } elseif ($InstallFrameworkPlugins -eq 1) {
        $result = Install-IcingaFrameworkPlugins -PluginsUrl $PluginsUrl;
        $InstallerArguments += "-InstallFrameworkPlugins 1";
        $InstallerArguments += "-PluginsUrl '$PluginsUrl'";
    } else {
        if ((Test-IcingaWizardArgument -Argument 'InstallFrameworkPlugins') -eq $FALSE) {
            $InstallerArguments += "-InstallFrameworkPlugins 0";
        }
    }

    if ($null -eq $InstallFrameworkService) {
        if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you want to install the Icinga PowerShell Framework as a service?' -Default 'y').result -eq 1) {
            $result = Get-IcingaFrameworkServiceBinary;
            $InstallerArguments += "-InstallFrameworkService 1";
            $InstallerArguments += [string]::Format("-FrameworkServiceUrl '{0}'", $result.FrameworkServiceUrl);
            $InstallerArguments += [string]::Format("-ServiceDirectory '{0}'", $result.ServiceDirectory);
            $InstallerArguments += [string]::Format("-ServiceBin '{0}'", $result.ServiceBin);
            $ServiceBin = $result.ServiceBin;
        } else {
            $InstallerArguments += "-InstallFrameworkService 0";
        }
    } elseif ($InstallFrameworkService -eq $TRUE) {
        $result     = Get-IcingaFrameworkServiceBinary -FrameworkServiceUrl $FrameworkServiceUrl -ServiceDirectory $ServiceDirectory;
        $ServiceBin = $result.ServiceBin;
    } else {
        $InstallerArguments += "-InstallFrameworkService 0";
    }

    if ($InstallerArguments.Count -ne 0) {
        $InstallerArguments += "-RunInstaller";
        Write-IcingaConsoleNotice 'The wizard is complete. These are the configured settings:';

        Write-IcingaConsolePlain '========';
        Write-IcingaConsolePlain ($InstallerArguments | Out-String);
        Write-IcingaConsolePlain '========';

        if (-Not $RunInstaller) {
            if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Is this configuration correct?' -Default 'y').result -eq 1) {
                if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you want to run the installer now? (Otherwise only the configuration command will be printed)' -Default 'y').result -eq 1) {
                    Write-IcingaConsoleNotice 'To execute your Icinga Agent installation based on your answers again on this or another machine, simply run this command:';

                    $RunInstaller = $TRUE;
                } else {
                    Write-IcingaConsoleNotice 'To execute your Icinga Agent installation based on your answers, simply run this command:';
                }
            } else {
                Write-IcingaConsoleNotice 'Please run the wizard again to modify your answers or modify the command below:';
            }
        }
        Get-IcingaAgentInstallCommand -InstallerArguments $InstallerArguments -PrintConsole;
    }

    if ($RunInstaller) {
        if ((Install-IcingaAgent -Version $AgentVersion -Source $PackageSource -AllowUpdates $AllowVersionChanges) -Or $Reconfigure) {
            Reset-IcingaAgentConfigFile;
            Move-IcingaAgentDefaultConfig;
            Set-IcingaAgentNodeName -Hostname $Hostname;
            Set-IcingaAgentServiceUser -User $ServiceUser -Password $ServicePass -SetPermission | Out-Null;
            if ($InstallFrameworkService) {
                Install-IcingaFrameworkService -Path $ServiceBin -User $ServiceUser -Password $ServicePass | Out-Null;
            }
            Register-IcingaBackgroundDaemon -Command 'Start-IcingaServiceCheckDaemon';
            Install-IcingaAgentBaseFeatures;
            $CertsInstalled = Install-IcingaAgentCertificates -Hostname $Hostname -Endpoint $CAEndpoint -Port $CAPort -CACert $CAFile -Ticket $Ticket;
            Write-IcingaAgentApiConfig -Port $CAPort;
            if ($EmptyCA -eq $TRUE -Or $CertsInstalled -eq $FALSE) {
                Disable-IcingaAgentFeature 'api';
                Write-IcingaConsoleWarning -Message '{0}{1}{2}{3}{4}' -Objects 'Your Icinga Agent API feature has been disabled. Please provide either your ca.crt ', 
                                                    'or connect to a parent node for certificate requests. You can run "Install-IcingaAgentCertificates" ',
                                                    'with your configuration to properly create the host certificate and a valid certificate request. ',
                                                    'After this you can enable the API feature by using "Enable-IcingaAgentFeature api" and restart the ',
                                                    'Icinga Agent service "Restart-IcingaService icinga2"';
            }
            Write-IcingaAgentZonesConfig -Endpoints $Endpoints -EndpointConnections $EndpointConnections -ParentZone $ParentZone -GlobalZones $GlobalZoneConfig -Hostname $Hostname;
            if ($AddFirewallRule) {
                # First cleanup the system by removing all old Firewalls
                Enable-IcingaFirewall -IcingaPort $CAPort -Force;
            }
            Test-IcingaAgent;
            if ($InstallFrameworkService) {
                Restart-IcingaService 'icingapowershell';
            }
            Restart-IcingaService 'icinga2';
        }
    }
}

function Add-InstallerArgument()
{
    param(
        $InstallerArguments,
        [string]$Key,
        $Value,
        [switch]$ReturnValue
    );

    [bool]$IsArray = $Value -is [array];

    # Check for arrays
    if ($IsArray) {
        [array]$NewArray = @();
        foreach ($entry in $Value) {
            $NewArray += Add-InstallerArgument -Value $entry -ReturnValue;
        }

        if ($ReturnValue) {
            return ([string]::Join(',', $NewArray));
        }

        $InstallerArguments += [string]::Format(
            '-{0} {1}',
            $Key,
            [string]::Join(',', $NewArray)
        );

        return $InstallerArguments;
    }

    # Check for integers
    if (Test-Numeric $Value) {
        if ($ReturnValue) {
            return $Value;
        }

        $InstallerArguments += [string]::Format(
            '-{0} {1}',
            $Key,
            $Value
        );

        return $InstallerArguments;
    }

    # Check for integer conversion
    $IntValue = ConvertTo-Integer -Value $Value;
    if ([string]$Value -ne [string]$IntValue) {
        if ($ReturnValue) {
            return $IntValue;
        }

        $InstallerArguments += [string]::Format(
            '-{0} {1}',
            $Key,
            $IntValue
        );

        return $InstallerArguments;
    }

    $Type     = $Value.GetType().Name;
    $NewValue = $null;

    if ($Type -eq 'String') {
        $NewValue = [string]::Format(
            "'{0}'",
            $Value
        );

        if ($ReturnValue) {
            return $NewValue;
        }

        $InstallerArguments += [string]::Format(
            '-{0} {1}',
            $Key,
            $NewValue
        );

        return $InstallerArguments;
    }
}

function Test-IcingaWizardArgument()
{
    param(
        [string]$Argument
    );

    foreach ($entry in $InstallerArguments) {
        if ($entry -like [string]::Format('-{0} *', $Argument)) {
            return $TRUE;
        }
    }

    return $FALSE;
}

function Set-IcingaWizardArgument()
{
    param(
        [hashtable]$DirectorArgs,
        [string]$WizardArg,
        $Value,
        $Default                 = $null,
        $InstallerArguments
    );

    if ($DirectorArgs.Overrides.ContainsKey($WizardArg)) {

        $InstallerArguments = Add-InstallerArgument `
            -InstallerArguments $InstallerArguments `
            -Key $WizardArg `
            -Value $DirectorArgs.Overrides[$WizardArg];

        return @{
            'Value' = $DirectorArgs.Overrides[$WizardArg];
            'Args'  = $InstallerArguments;
        };
    }

    $RetValue = $null;

    if ($DirectorArgs.Arguments.ContainsKey($WizardArg)) {
        $RetValue = $DirectorArgs.Arguments[$WizardArg];
    } else {
        if ($null -ne $Value -Or [string]::IsNullOrEmpty($Value) -eq $FALSE) {

            $InstallerArguments = Add-InstallerArgument `
                -InstallerArguments $InstallerArguments `
                -Key $WizardArg `
                -Value $Value;

            return @{
                'Value' = $Value;
                'Args'  = $InstallerArguments;
            };
        } else {
            return @{
                'Value' = $Default;
                'Args'  = $InstallerArguments;
            };
        }
    }

    if ([string]::IsNullOrEmpty($Value) -eq $FALSE) {

        $InstallerArguments = Add-InstallerArgument `
                -InstallerArguments $InstallerArguments `
                -Key $WizardArg `
                -Value $Value;

        return @{
            'Value' = $Value;
            'Args'  = $InstallerArguments;
        };
    }

    return @{
        'Value' = $RetValue;
        'Args'  = $InstallerArguments;
    };
}
function Get-IcingaAgentInstallCommand()
{
    param(
        $InstallerArguments,
        [switch]$PrintConsole
    );

    [string]$Installer = (
        [string]::Format(
            'Start-IcingaAgentInstallWizard {0}',
            ([string]::Join(' ', $InstallerArguments))
        )
    );

    if ($PrintConsole) {
        Write-IcingaConsolePlain '===='
        Write-IcingaConsolePlain $Installer;
        Write-IcingaConsolePlain '===='
    } else {
        return $Installer;
    }
}