from lib.common import helpers

class Module:

    def __init__(self, mainMenu, params=[]):

        self.info = {
            'Name': 'Get-NetDomainController',

            'Author': ['@harmj0y'],

            'Description': ('Returns the domain controllers for the current domain or '
                            'the specified domain.'),

            'Background' : True,

            'OutputExtension' : None,
            
            'NeedsAdmin' : False,

            'OpsecSafe' : True,
            
            'MinPSVersion' : '2',
            
            'Comments': [
                'https://github.com/Veil-Framework/PowerTools/tree/master/PowerView'
            ]
        }

        # any options needed by the module, settable during runtime
        self.options = {
            # format:
            #   value_name : {description, required, default_value}
            'Agent' : {
                'Description'   :   'Agent to run module on.',
                'Required'      :   True,
                'Value'         :   ''
            },
            'Domain' : {
                'Description'   :   'The domain to query for domain controllers.',
                'Required'      :   False,
                'Value'         :   ''
            }
        }

        # save off a copy of the mainMenu object to access external functionality
        #   like listeners/agent handlers/etc.
        self.mainMenu = mainMenu

        for param in params:
            # parameter format is [Name, Value]
            option, value = param
            if option in self.options:
                self.options[option]['Value'] = value


    def generate(self):
        
        script = """
function Get-NetDomain {

    [CmdletBinding()]
    param(
        [String]
        $Domain
    )

    if($Domain -and ($Domain -ne "")){
        $DomainContext = New-Object System.DirectoryServices.ActiveDirectory.DirectoryContext('Domain', $Domain)
        try {
            [System.DirectoryServices.ActiveDirectory.Domain]::GetDomain($DomainContext)
        }
        catch{
            Write-Warning "The specified domain $Domain does not exist, could not be contacted, or there isn't an existing trust."
            $Null
        }
    }
    else{
        [System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain()
    }
}

function Get-NetDomainController {
    [CmdletBinding()]
    param(
        [string]
        $Domain
    )

    $d = Get-NetDomain -Domain $Domain
    if($d){
        $d.DomainControllers
    }
}
"""

        script += "Get-NetDomainController "

        for option,values in self.options.iteritems():
            if option.lower() != "agent":
                if values['Value'] and values['Value'] != '':
                    if values['Value'].lower() == "true":
                        # if we're just adding a switch
                        script += " -" + str(option)
                    else:
                        script += " -" + str(option) + " " + str(values['Value']) 
        
        return script