. $PSScriptRoot\..\..\Load-PesterModules.ps1
$here = Split-Path -Parent $MyInvocation.MyCommand.Path
$sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.tests\.', '.'
$functionPath = Join-Path -Path $here -ChildPath $sut
Write-Host "Overriding SUT: $functionPath"
Import-Module $functionPath -Force
$moduleForMock = ""

Describe "Get-SupportedPlatformAPMVersion" {

    Context "Unhappy Path" {

        It "Writes a Warning and Returns Null if More Than One APM Version Match Found" {

            Mock -ModuleName $moduleForMock -CommandName Get-SupportedPlatformAPMVersionMap -MockWith {

                return @(
                    @{
                        APMVersion             = "9.1.1.0";
                        PlatformMinimumVersion = "0.0.0.0";
                        PlatformMaximumVersion = "2.0.0.0";
                    },
                    @{
                        APMVersion             = "9.2.2.0";
                        PlatformMinimumVersion = "0.0.0.0";
                        PlatformMaximumVersion = "2.0.0.0";
                    }
                )
            }

            Mock -ModuleName $moduleForMock -CommandName Write-Warning -MockWith {}
            Get-SupportedPlatformAPMVersion -PlatformVersion "1.0.0.0" | Should -BeNullOrEmpty
            Assert-MockCalled -ModuleName $moduleForMock -CommandName Write-Warning -Scope It -Times 1 -ParameterFilter {

                $Message -match "More than one NewRelic APM version matched"
            }
        }

        It "Writes a Warning and Returns Null if Remote Version Retrieval Fails" {

            Mock -ModuleName $moduleForMock -CommandName Write-Warning -MockWith {}
            Mock -ModuleName $moduleForMock -CommandName Invoke-Command -MockWith { return $null }
            Get-SupportedPlatformAPMVersion -ComputerName "iDontExist.nowhere.org" | Should -BeNullOrEmpty
            Assert-MockCalled -ModuleName $moduleForMock -CommandName Write-Warning -Scope It -Times 1 -ParameterFilter {

                $Message -match "Could not retrieve Alkami Platform version"
            }
        }

        It "Throws if a User Specifies Both Remote Retrieval and Platform Version" {

            { Get-SupportedPlatformAPMVersion -PlatformVersion "1.0.0.0" -ComputerName "fakemachine.lulwut.com" } | Should -Throw
        }
    }

    Context "Happy Path" {

        Mock -ModuleName $moduleForMock -CommandName Get-SupportedPlatformAPMVersionMap -MockWith {

            return @(
                @{
                    APMVersion             = "8.6.7.5309";
                    PlatformMinimumVersion = "0.0.0.0";
                    PlatformMaximumVersion = "2.0.0.0";
                },
                @{
                    APMVersion             = "192.168.1.1";
                    PlatformMinimumVersion = "2.0.0.1";
                    PlatformMaximumVersion = "2.9.9.9";
                },
                @{
                    APMVersion             = "8.8.8.8";
                    PlatformMinimumVersion = "3.0.0.0";
                    PlatformMaximumVersion = $null;
                }
            )
        }

        $happyPathTestCases = @(
            @{ version = "0.0.0.0";     apmVersion = "8.6.7.5309"; },
            @{ version = "0.0.0.1";     apmVersion = "8.6.7.5309"; },
            @{ version = "1.0.0.0";     apmVersion = "8.6.7.5309"; },
            @{ version = "1.1.1.1";     apmVersion = "8.6.7.5309"; },
            @{ version = "2.0.0.0";     apmVersion = "8.6.7.5309"; },
            @{ version = "2.0.0.1";     apmVersion = "192.168.1.1"; },
            @{ version = "2.1.3.4";     apmVersion = "192.168.1.1"; },
            @{ version = "2.9.9.9";     apmVersion = "192.168.1.1"; },
            @{ version = "3.0.0.0";     apmVersion = "8.8.8.8"; },
            @{ version = "99.99.99.99"; apmVersion = "8.8.8.8"; }
        )

        It "Returns Expected Values: (<apmVersion>)" -TestCases $happyPathTestCases {

            param ($version, $apmVersion)
            Get-SupportedPlatformAPMVersion -PlatformVersion $version | Should -Be $apmVersion
        }

        $zeroPaddingTestCases = @(
            @{ version = "0.0";       apmVersion = "8.6.7.5309"; },
            @{ version = "0.0.0";     apmVersion = "8.6.7.5309"; },
            @{ version = "2.1";       apmVersion = "192.168.1.1"; },
            @{ version = "2.1.0";     apmVersion = "192.168.1.1"; }
        )

        It "Pads Short Versions and Returns Expected Values: (<apmVersion>)" -TestCases $zeroPaddingTestCases {

            param ($version, $apmVersion)
            Get-SupportedPlatformAPMVersion -PlatformVersion $version | Should -Be $apmVersion
        }
    }

    Context "Parameter Handling" {

        It "Does Not Attempt Remote Connection if Platform Version Provided" {

            Mock -ModuleName $moduleForMock -CommandName Invoke-Command -MockWith {}

            Get-SupportedPlatformAPMVersion -PlatformVersion "1.2.3.4"
            Assert-MockCalled -ModuleName $moduleForMock -CommandName Invoke-Command -Times 0 -Exactly -Scope It
        }

        It "Looks Up the Local ORB Version if No Parameters Provided" {

            Mock -ModuleName $moduleForMock -CommandName Invoke-Command -MockWith {}
            Mock -ModuleName $moduleForMock -CommandName Get-ORBVersion -MockWith { return "1.1.1.1" }

            Get-SupportedPlatformAPMVersion
            Assert-MockCalled -ModuleName $moduleForMock -CommandName Get-ORBVersion -Times 1 -Exactly -Scope It
            Assert-MockCalled -ModuleName $moduleForMock -CommandName Invoke-Command -Times 0 -Exactly -Scope It
        }
    }
}