#Requires -Modules Pester
$moduleFileName = "ZertoApiWrapper.psd1"
$here = (Split-Path -Parent $MyInvocation.MyCommand.Path).Replace("Tests", "ZertoApiWrapper")
$sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path).Replace(".Tests.", ".")
$file = Get-ChildItem "$here\$sut"
$modulePath = $here -replace "Public", ""
$moduleFile = Get-ChildItem "$modulePath\$moduleFileName"
Get-Module -Name ZertoApiWrapper | Remove-Module -Force
Import-Module $moduleFile -Force

Describe $file.BaseName -Tag 'Unit' {

    It "Is valid Powershell (Has no script errors)" {
        $contents = Get-Content -Path $file -ErrorAction Stop
        $errors = $null
        $null = [System.Management.Automation.PSParser]::Tokenize($contents, [ref]$errors)
        $errors | Should -HaveCount 0
    }

    Context "$($file.BaseName)::Parameter Unit Tests" {

        it "Has a mandatory string parameter for the target host" {
            Get-Command $file.BaseName | Should -HaveParameter TargetHost -Mandatory -Type String
        }

        it "Will not take a non-ip address as a 'TargetHost'" {
            {Add-ZertoPeerSite -targetHost 'MyZVMHost' -targetPort '9081'} | should -Throw
            {Add-ZertoPeerSite -targetHost '192.168.1.266' -targetPort '9081'} | should -Throw
            {Add-ZertoPeerSite -targetHost '192.168.1' -targetPort '9081'} | should -Throw
            {Add-ZertoPeerSite -targetHost $null -targetPort '9081'} | should -Throw
        }

        it "Has a non-mandatory string parameter for the target port with default value of 9081" {
            Get-Command $file.BaseName | Should -HaveParameter TargetPort -Not -Mandatory
            Get-Command $file.BaseName | Should -HaveParameter TargetPort -Type Int32
            Get-Command $file.BaseName | Should -HaveParameter TargetPort -DefaultValue 9081
        }

        it "Will not take a non-int as a port" {
            {Add-ZertoPeerSite -targetHost '192.168.1.100' -targetPort 'string'} | should -Throw
            {Add-ZertoPeerSite -targetHost '192.168.1.100' -targetPort $true} | should -Throw
            {Add-ZertoPeerSite -targetHost '192.168.1.100' -targetPort $null} | should -Throw
        }

        It "Will fail if the specified port is outside of the range 1024 - 65535" {
            {Add-ZertoPeerSite -targetHost '192.168.1.100' -targetPort 1023} | Should -Throw
            {Add-ZertoPeerSite -targetHost '192.168.1.100' -targetPort 65536} | Should -Throw
            {Add-ZertoPeerSite -targetHost '192.168.1.100' -targetPort 0} | Should -Throw
            {Add-ZertoPeerSite -targetHost '192.168.1.100' -targetPort -1} | Should -Throw
        }

        it "Supports 'SupportsShouldProcess'" {
            Get-Command $file.BaseName | Should -HaveParameter WhatIf
            Get-Command $file.BaseName | Should -HaveParameter Confirm
            $file | Should -FileContentMatch 'SupportsShouldProcess'
            $file | Should -FileContentMatch '\$PSCmdlet\.ShouldProcess\(.+\)'
        }
    }

    Context "$($file.BaseName)::Function Unit Tests" {

        Mock -ModuleName ZertoApiWrapper Invoke-ZertoRestRequest {
            return "9a49f42e-2bbd-4bf8-b571-77908a2e5e98.928a122b-1763-4664-ad37-cc00bb883f2f"
        }

        it "Returns a string value" {
            $results = Add-ZertoPeerSite -targetHost '192.168.1.100' -targetPort '9081'
            $results | should -Not -BeNullOrEmpty
            $results | should -BeOfType "String"
            $results | Should -BeExactly "9a49f42e-2bbd-4bf8-b571-77908a2e5e98.928a122b-1763-4664-ad37-cc00bb883f2f"
        }

        Assert-MockCalled -ModuleName ZertoApiWrapper -CommandName Invoke-ZertoRestRequest
    }
}