# Used for finding the relevant ARN or name for a policy when given the unique ID
# Use:
# .\GetInfoFromUniqueId.ps1 -target ANPAXXXXXXXXXXXXXXXXX -name # Returns name of resource
# .\GetInfoFromUniqueId.ps1 -target ANPAXXXXXXXXXXXXXXXXX -arn # Returns arn of resource
# .\GetInfoFromUniqueId.ps1 -target ANPAXXXXXXXXXXXXXXXXX -arn -name # Returns both arn and name of resource
# .\GetInfoFromUniqueId.ps1 -target ANPAXXXXXXXXXXXXXXXXX -arn -name -id # Returns arn, name and unique id of resource 

Param (
[string]$target,
[switch]$arn,
[switch]$name,
[switch]$id
)

$uniqueIdType = "$($target.Substring(0,4))"

switch($uniqueIdType){
    # "ABIA" { $command="" }
    # "ACCA" { $command="" }
    "AGPA" { $command="list-groups"   }
    "AIDA" { $command="list-users" }
    # "AIPA" { $command="" }
    "AKIA" { $command="" }
    "ANPA" { $command="list-policies" }
    # "ANVA" { $command="" }
    # "APKA" { $command="" }
    "AROA" { $command="list-roles"    }
    "ASCA" { $command="list-server-certificates" }
    # "ASIA" { $command="" }
}

$env:Path = [System.Environment]::GetEnvironmentVariable("Path","Machine")
$awsCommand = "aws iam $command"
$retunedObjects = Invoke-Expression $awsCommand | ConvertFrom-Json

if ($returnedObjects -eq $null) {
    return
}

$objectFound=$false

foreach($object in $retunedObjects.Policies) {
    if ($objectFound -eq $true) {
        break
    }
    elseif ("$target" -eq "$($object.PolicyId)") {
        if ($name -eq $true) {
            Write-Output "$($object.PolicyName)"
        }
        if ($arn -eq $true) {
            Write-Output "$($object.Arn)"
        }
        if ($id -eq $true) {
            Write-Output "$($object.PolicyId)"
        }
        $objectFound=$true
    }
}