function Invoke-GPOZaurr {
    [alias('Show-GPOZaurr', 'Show-GPO')]
    [cmdletBinding()]
    param(
        [Parameter(Position = 1)][scriptblock] $ExcludeGroupPolicies,
        [string] $FilePath,
        [Parameter(Position = 0)][string[]] $Type,
        [switch] $PassThru,
        [switch] $HideHTML,
        [switch] $HideSteps,
        [switch] $ShowError,
        [switch] $ShowWarning,
        [alias('ForestName')][string] $Forest,
        [string[]] $ExcludeDomains,
        [alias('Domain', 'Domains')][string[]] $IncludeDomains
    )
    Reset-GPOZaurrStatus # This makes sure types are at it's proper status

    $Script:Reporting = [ordered] @{}
    $Script:Reporting['Version'] = Get-GitHubVersion -Cmdlet 'Invoke-GPOZaurr' -RepositoryOwner 'evotecit' -RepositoryName 'GPOZaurr'
    $Script:Reporting['Settings'] = @{
        ShowError   = $ShowError.IsPresent
        ShowWarning = $ShowWarning.IsPresent
        HideSteps   = $HideSteps.IsPresent
    }
    Write-Color '[i]', "[GPOZaurr] ", 'Version', ' [Informative] ', $Script:Reporting['Version'] -Color Yellow, DarkGray, Yellow, DarkGray, Magenta

    # Verify requested types are supported
    $Supported = [System.Collections.Generic.List[string]]::new()
    [Array] $NotSupported = foreach ($T in $Type) {
        if ($T -notin $Script:GPOConfiguration.Keys ) {
            $T
        } else {
            $Supported.Add($T)
        }
    }
    if ($Supported) {
        Write-Color '[i]', "[GPOZaurr] ", 'Supported types', ' [Informative] ', "Chosen by user: ", ($Supported -join ', ') -Color Yellow, DarkGray, Yellow, DarkGray, Yellow, Magenta
    }
    if ($NotSupported) {
        Write-Color '[i]', "[GPOZaurr] ", 'Not supported types', ' [Informative] ', "Following types are not supported: ", ($NotSupported -join ', ') -Color Yellow, DarkGray, Yellow, DarkGray, Yellow, Magenta
        Write-Color '[i]', "[GPOZaurr] ", 'Not supported types', ' [Informative] ', "Please use one/multiple from the list: ", ($Script:GPOConfiguration.Keys -join ', ') -Color Yellow, DarkGray, Yellow, DarkGray, Yellow, Magenta
        return
    }
    $DisplayForest = if ($Forest) { $Forest } else { 'Not defined. Using current one' }
    $DisplayIncludedDomains = if ($IncludeDomains) { $IncludeDomains -join "," } else { 'Not defined. Using all domains of forest' }
    $DisplayExcludedDomains = if ($ExcludeDomains) { $ExcludeDomains -join ',' } else { 'No exclusions provided' }
    Write-Color '[i]', "[GPOZaurr] ", 'Domain Information', ' [Informative] ', "Forest: ", $DisplayForest -Color Yellow, DarkGray, Yellow, DarkGray, Yellow, Magenta
    Write-Color '[i]', "[GPOZaurr] ", 'Domain Information', ' [Informative] ', "Included Domains: ", $DisplayIncludedDomains -Color Yellow, DarkGray, Yellow, DarkGray, Yellow, Magenta
    Write-Color '[i]', "[GPOZaurr] ", 'Domain Information', ' [Informative] ', "Excluded Domains: ", $DisplayExcludedDomains -Color Yellow, DarkGray, Yellow, DarkGray, Yellow, Magenta

    # Exclusions support, converts ScriptBlock into list of GPOs
    <#
    $Exclusions = [ordered]@{}
    if ($Extension) {
        $Exclusions['All'] = [System.Collections.Generic.List[PSCustomObject]]::new()
        [Array] $ExecuteExtension = & $Extension
        foreach ($Ext in $ExecuteExtension) {
            if ($Ext.Type -eq 'Exclusion') {
                if ($Ext.Type) {
                    if (-not $Exclusions[$Ext.Type]) {
                        $Exclusions[$Ext.Type] = [System.Collections.Generic.List[PSCustomObject]]::new()
                    }
                    $Exclusions[$Ext.Type].Add($Ext)
                } else {
                    $Exclusions['All'].Add($Ext)
                }
            }
        }
    }
    #>

    # Lets make sure we only enable those types which are requestd by user
    if ($Type) {
        foreach ($T in $Script:GPOConfiguration.Keys) {
            $Script:GPOConfiguration[$T].Enabled = $false
        }
        # Lets enable all requested ones
        foreach ($T in $Type) {
            $Script:GPOConfiguration[$T].Enabled = $true
        }
    }

    # Build data
    foreach ($T in $Script:GPOConfiguration.Keys) {
        if ($Script:GPOConfiguration[$T].Enabled -eq $true) {
            $Script:Reporting[$T] = [ordered] @{
                Name              = $Script:GPOConfiguration[$T].Name
                ActionRequired    = $null
                Data              = $null
                Exclusions        = $null
                WarningsAndErrors = $null
                Time              = $null
                Summary           = $null
                Variables         = Copy-Dictionary -Dictionary $Script:GPOConfiguration[$T]['Variables']
            }
            if ($Exclusions) {
                $Script:Reporting[$T]['ExclusionsCode'] = $ExcludeGroupPolicies
                $Script:Reporting[$T]['Exclusions'] = & $ExcludeGroupPolicies
            }

            $TimeLogGPOList = Start-TimeLog
            Write-Color -Text '[i]', '[Start] ', $($Script:GPOConfiguration[$T]['Name']) -Color Yellow, DarkGray, Yellow
            $OutputCommand = Invoke-Command -ScriptBlock $Script:GPOConfiguration[$T]['Execute'] -WarningVariable CommandWarnings -ErrorVariable CommandErrors -ArgumentList $Forest, $ExcludeDomains, $IncludeDomains
            if ($OutputCommand -is [System.Collections.IDictionary]) {
                # in some cases the return will be wrapped in Hashtable/orderedDictionary and we need to handle this without an array
                $Script:Reporting[$T]['Data'] = $OutputCommand
            } else {
                # since sometimes it can be 0 or 1 objects being returned we force it being an array
                $Script:Reporting[$T]['Data'] = [Array] $OutputCommand
            }
            Invoke-Command -ScriptBlock $Script:GPOConfiguration[$T]['Processing']
            $Script:Reporting[$T]['WarningsAndErrors'] = @(
                if ($ShowWarning) {
                    foreach ($War in $CommandWarnings) {
                        [PSCustomObject] @{
                            Type       = 'Warning'
                            Comment    = $War
                            Reason     = ''
                            TargetName = ''
                        }
                    }
                }
                if ($ShowError) {
                    foreach ($Err in $CommandErrors) {
                        [PSCustomObject] @{
                            Type       = 'Error'
                            Comment    = $Err
                            Reason     = $Err.CategoryInfo.Reason
                            TargetName = $Err.CategoryInfo.TargetName
                        }
                    }
                }
            )
            #if ($Script:GPOConfiguration[$T]['Summary']) {
            #    $Script:Reporting[$T]['Summary'] = Invoke-Command -ScriptBlock $Script:GPOConfiguration[$T]['Summary']
            #}
            $TimeEndGPOList = Stop-TimeLog -Time $TimeLogGPOList -Option OneLiner
            $Script:Reporting[$T]['Time'] = $TimeEndGPOList
            Write-Color -Text '[i]', '[End  ] ', $($Script:GPOConfiguration[$T]['Name']), " [Time to execute: $TimeEndGPOList]" -Color Yellow, DarkGray, Yellow, DarkGray
        }
    }

    # Generate pretty HTML
    $TimeLogHTML = Start-TimeLog
    Write-Color -Text '[i]', '[HTML ] ', 'Generating HTML report' -Color Yellow, DarkGray, Yellow
    New-HTML -Author 'Przemysław Kłys' -TitleText 'GPOZaurr Report' {
        New-HTMLTabStyle -BorderRadius 0px -TextTransform capitalize -BackgroundColorActive SlateGrey
        New-HTMLSectionStyle -BorderRadius 0px -HeaderBackGroundColor Grey -RemoveShadow
        New-HTMLPanelStyle -BorderRadius 0px
        New-HTMLTableOption -DataStore JavaScript -BoolAsString

        New-HTMLHeader {
            New-HTMLSection -Invisible {
                New-HTMLSection {
                    New-HTMLText -Text "Report generated on $(Get-Date)" -Color Blue
                } -JustifyContent flex-start -Invisible
                New-HTMLSection {
                    New-HTMLText -Text "GPOZaurr - $($Script:Reporting['Version'])" -Color Blue
                } -JustifyContent flex-end -Invisible
            }
        }

        if ($Type.Count -eq 1) {
            foreach ($T in $Script:GPOConfiguration.Keys) {
                if ($Script:GPOConfiguration[$T].Enabled -eq $true) {
                    if ($Script:GPOConfiguration[$T]['Summary']) {
                        $Script:Reporting[$T]['Summary'] = Invoke-Command -ScriptBlock $Script:GPOConfiguration[$T]['Summary']
                    }
                    & $Script:GPOConfiguration[$T]['Solution']
                }
            }
        } else {
            foreach ($T in $Script:GPOConfiguration.Keys) {
                if ($Script:GPOConfiguration[$T].Enabled -eq $true) {
                    if ($Script:GPOConfiguration[$T]['Summary']) {
                        $Script:Reporting[$T]['Summary'] = Invoke-Command -ScriptBlock $Script:GPOConfiguration[$T]['Summary']
                    }
                    New-HTMLTab -Name $Script:GPOConfiguration[$T]['Name'] {
                        & $Script:GPOConfiguration[$T]['Solution']
                    }
                }
            }
        }
    } -Online -ShowHTML:(-not $HideHTML) -FilePath $FilePath
    $TimeLogEndHTML = Stop-TimeLog -Time $TimeLogHTML -Option OneLiner
    Write-Color -Text '[i]', '[HTML ] ', 'Generating HTML report', " [Time to execute: $TimeLogEndHTML]" -Color Yellow, DarkGray, Yellow, DarkGray
    if ($PassThru) {
        $Script:Reporting
    }
    Reset-GPOZaurrStatus # This makes sure types are at it's proper status

}

[scriptblock] $SourcesAutoCompleter = {
    param($commandName, $parameterName, $wordToComplete, $commandAst, $fakeBoundParameters)

    $Script:GPOConfiguration.Keys | Sort-Object | Where-Object { $_ -like "*$wordToComplete*" }
}

Register-ArgumentCompleter -CommandName Invoke-GPOZaurr -ParameterName Type -ScriptBlock $SourcesAutoCompleter