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

Describe 'Get-ACMCertificateBindingList' {

    Mock -CommandName Get-AlkamiAwsProfileList -ModuleName $moduleForMock -MockWith { return @( 'temp-test1', 'temp-test2' ) }
    Mock -CommandName Get-SupportedAwsRegions -ModuleName $moduleForMock -MockWith { return @( 'us-fake-1', 'us-fake-2' ) }
    Mock -CommandName Get-AWSRegion    -ModuleName $moduleForMock -MockWith { return @( @{ 'Region' = 'us-fake-1' }, @{ 'Region' = 'us-fake-2' } ) }
    Mock -CommandName Get-LogLeadName -ModuleName $moduleForMock -MockWith { return 'Get-ACMCertificateBindingList.tests' }
    Mock -CommandName Import-AWSModule -ModuleName $moduleForMock -MockWith {}
    Mock -CommandName Write-Warning -ModuleName $moduleForMock -MockWith {}
    Mock -CommandName Test-IsCollectionNullOrEmpty -ModuleName $moduleForMock -MockWith { return $false }

    Mock -CommandName Get-ELB2ListenerCertificate -ModuleName $moduleForMock -MockWith {
        $testObject = @{
            CertificateArn = 'TestCertificateArn'
        }

        return @($testObject)
    }

    Mock -CommandName Get-ACMCertificateDetailsListByName -ModuleName $moduleForMock -MockWith {
        $testObject = @{
            DomainName         = 'TestDomainName'
            CertificateArn     = 'TestCertificateArn'
            InUseBy            = @(
                'TestCertificateUser',
                'TestCertificateUser-loadbalancer'
            )
            NotAfter           = @{
                Date = 'TestDate'
            }
            RenewalEligibility = @{
                Value = 'TestRenewalEligibility'
            }
        }

        return @($testObject)
    }

    Mock -CommandName Get-AG2DomainNameList -ModuleName $moduleForMock -MockWith {
        $testObject = @{
            Name                     = 'TestApi'
            DomainNameConfigurations = @{
                CertificateArn = 'TestCertificateArn'
            }
        }

        return @($testObject)
    }

    Mock -CommandName Get-ELB2Listener -ModuleName $moduleForMock -MockWith {

        $testObject = @{
            ListenerArn = 'TestListenerArn'
        }

        return @($testObject)
    }

    Mock -CommandName Get-AG2ApiMappingList -ModuleName $moduleForMock -MockWith {
        $testObject = @{
            ApiId = 'TestApiId'
            Stage = 'TestStage'
        }

        return @($testObject)
    }

    Context 'Parameter Validation' {

        It 'Throws if DomainName is Null' {
            { Get-ACMCertificateBindingList -DomainName $null } | Should -Throw
        }

        It 'Throws if DomainName is Empty' {
            { Get-ACMCertificateBindingList -DomainName '' } | Should -Throw
        }

        It 'Throws if Profile is Not In Approved List' {
            { Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-localtest' } | Should -Throw
        }

        It 'Throws if Region is Not In Approved List' {
            { Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Region 'us-test-2' } | Should -Throw
        }
    }

    Context 'Logic Validation' {

        It 'Uses ProfileName Parameter if Provided' {

            Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Region 'us-fake-1' | Out-Null

            Assert-MockCalled -CommandName Get-ACMCertificateDetailsListByName -Times 1 -Exactly -Scope It `
                -ParameterFilter { $ProfileName -ceq 'temp-test1' }
        }

        It 'Uses All Supported Profiles if ProfileName Parameter is Not Provided' {

            $validProfiles = Get-AlkamiAwsProfileList
            Get-ACMCertificateBindingList -DomainName 'TestDomainName' -Region 'us-fake-1' -Verbose | Out-Null

            Assert-MockCalled -CommandName Get-ACMCertificateDetailsListByName -Times $validProfiles.Length -Exactly -Scope It `
                -ParameterFilter { $ProfileName -in $validProfiles }
        }

        It 'Uses Region Parameter if Provided' {

            Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Region 'us-fake-1' | Out-Null

            Assert-MockCalled -CommandName Get-ACMCertificateDetailsListByName -Times 1 -Exactly -Scope It `
                -ParameterFilter { $Region -ceq 'us-fake-1' }
        }

        It 'Uses All Supported Regions if Region Parameter is Not Provided' {

            $validRegions = Get-SupportedAwsRegions
            Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Verbose | Out-Null

            Assert-MockCalled -CommandName Get-ACMCertificateDetailsListByName -Times $validRegions.Length -Exactly -Scope It `
                -ParameterFilter { $Region -in $validRegions }
        }

        It 'Aborts Processing in Current Region if Get-ACMCertificateDetailsListByName Throws' {

            Mock -CommandName Get-ACMCertificateDetailsListByName -ModuleName $moduleForMock -MockWith { throw 'This is an exception.' }

            Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Region 'us-fake-1' -Verbose | Out-Null

            Assert-MockCalled -CommandName Get-ACMCertificateDetailsListByName -Times 1 -Exactly -Scope It
            Assert-MockCalled -CommandName Test-IsCollectionNullOrEmpty -Times 0 -Exactly -Scope It

            Assert-MockCalled -CommandName Write-Warning -Times 1 -Exactly -Scope It `
                -ParameterFilter { $Message -match 'Unable to retrieve ACM certificate details by name' }

            Mock -CommandName Get-ACMCertificateDetailsListByName -ModuleName $moduleForMock -MockWith {
                $testObject = @{
                    DomainName         = 'TestDomainName'
                    CertificateArn     = 'TestCertificateArn'
                    InUseBy            = @(
                        'TestCertificateUser',
                        'TestCertificateUser-loadbalancer'
                    )
                    NotAfter           = @{
                        Date = 'TestDate'
                    }
                    RenewalEligibility = @{
                        Value = 'TestRenewalEligibility'
                    }
                }

                return @($testObject)
            }
        }

        It 'Aborts Processing in Current Region if Get-ACMCertificateDetailsListByName Throws' {

            Mock -CommandName Test-IsCollectionNullOrEmpty -ModuleName $moduleForMock -MockWith { return $true }

            Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Region 'us-fake-1' -Verbose | Out-Null

            Assert-MockCalled -CommandName Test-IsCollectionNullOrEmpty -Times 1 -Exactly -Scope It
            Assert-MockCalled -CommandName Get-AG2DomainNameList -Times 0 -Exactly -Scope It

            Assert-MockCalled -CommandName Write-Warning -Times 1 -Exactly -Scope It `
                -ParameterFilter { $Message -match 'No certificates found with a domain name of' }

            Mock -CommandName Test-IsCollectionNullOrEmpty -ModuleName $moduleForMock -MockWith { return $false }
        }

        It 'Prints Warning if Get-ELB2Listener Throws' {

            Mock -CommandName Get-ELB2Listener -ModuleName $moduleForMock -MockWith { throw 'This is an exception.' }

            Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Region 'us-fake-1' -Verbose | Out-Null

            Assert-MockCalled -CommandName Get-ELB2Listener -Times 1 -Exactly -Scope It
            Assert-MockCalled -CommandName Get-ELB2ListenerCertificate -Times 0 -Exactly -Scope It
            Assert-MockCalled -CommandName Write-Warning -Times 1 -Exactly -Scope It `
                -ParameterFilter { $Message -match 'Encountered an error retrieving ELB Listener details for' }

            Mock -CommandName Get-ELB2Listener -ModuleName $moduleForMock -MockWith {

                $testObject = @{
                    ListenerArn = 'TestListenerArn'
                }

                return @($testObject)
            }
        }

        It 'Prints Warning if Get-ELB2ListenerCertificate Throws' {

            Mock -CommandName Get-ELB2ListenerCertificate -ModuleName $moduleForMock -MockWith { throw 'This is an exception.' }

            Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Region 'us-fake-1' -Verbose | Out-Null

            Assert-MockCalled -CommandName Get-ELB2ListenerCertificate -Times 1 -Exactly -Scope It
            Assert-MockCalled -CommandName Write-Warning -Times 1 -Exactly -Scope It `
                -ParameterFilter { $Message -match 'Error encountered while retrieving ELB Listener certificate list' }

            Mock -CommandName Get-ELB2ListenerCertificate -ModuleName $moduleForMock -MockWith {
                $testObject = @{
                    CertificateArn = 'TestCertificateArn'
                }

                return @($testObject)
            }
        }

        It 'Skips API Gateway Domain Stage Mapping if Certificate Does Not Match' {

            Mock -CommandName Get-AG2DomainNameList -ModuleName $moduleForMock -MockWith {
                $testObject = @{
                    Name                     = 'TestApi'
                    DomainNameConfigurations = @{
                        CertificateArn = 'TestCertificateArnNotMatch'
                    }
                }

                return @($testObject)
            }

            Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Region 'us-fake-1' -Verbose | Out-Null

            Assert-MockCalled -CommandName Get-AG2DomainNameList -Times 1 -Exactly -Scope It
            Assert-MockCalled -CommandName Get-AG2ApiMappingList -Times 0 -Exactly -Scope It

            Mock -CommandName Get-AG2DomainNameList -ModuleName $moduleForMock -MockWith {
                $testObject = @{
                    Name                     = 'TestApi'
                    DomainNameConfigurations = @{
                        CertificateArn = 'TestCertificateArn'
                    }
                }

                return @($testObject)
            }
        }

        It 'Processes all InUseBy Entries for a Certificate' {

            Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Region 'us-fake-1' -Verbose | Out-Null

            Assert-MockCalled -CommandName Get-AG2DomainNameList -Times 1 -Exactly -Scope It
            Assert-MockCalled -CommandName Get-ELB2Listener -Times 1 -Exactly -Scope It
            Assert-MockCalled -CommandName Get-ELB2ListenerCertificate -Times 1 -Exactly -Scope It
            Assert-MockCalled -CommandName Get-AG2ApiMappingList -Times 1 -Exactly -Scope It
            Assert-MockCalled -CommandName Write-Warning -Times 0 -Exactly -Scope It
        }
    }

    Context 'Output Validation' {

        It 'Returns a Single Entry When A Single Certificate Is Found' {

            $result = Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Region 'us-fake-1' -Verbose
            $result | Should -HaveCount 1
        }

        It 'Returns an Array of InUseBy For Each Certificate User' {

            $result = Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Region 'us-fake-1' -Verbose
            $result[0].InUseBy | Should -HaveCount 3
        }

        It 'Returned InUseBy Array Contains ELB ARN if Listener Query Throws' {

            Mock -CommandName Get-ELB2Listener -ModuleName $moduleForMock -MockWith { throw 'This is a test.' }

            $result = Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Region 'us-fake-1' -Verbose

            Assert-MockCalled -CommandName Get-ELB2ListenerCertificate -Times 0 -Exactly -Scope It

            $result | Should -Not -BeNullOrEmpty
            $result[0].InUseBy | Should -HaveCount 3
            $result[0].InUseBy | Should -Contain 'TestCertificateUser-loadbalancer'

            Mock -CommandName Get-ELB2Listener -ModuleName $moduleForMock -MockWith {

                $testObject = @{
                    ListenerArn = 'TestListenerArn'
                }

                return @($testObject)
            }
        }

        It 'Returns Multiple Entries When Multiple Certificates Are Found' {

            Mock -CommandName Get-ACMCertificateDetailsListByName -ModuleName $moduleForMock -MockWith {
                $testObject1 = @{
                    DomainName         = 'TestDomainName'
                    CertificateArn     = 'TestCertificateArn'
                    InUseBy            = @(
                        'TestCertificateUser',
                        'TestCertificateUser-loadbalancer'
                    )
                    NotAfter           = @{
                        Date = 'TestDate'
                    }
                    RenewalEligibility = @{
                        Value = 'TestRenewalEligibility'
                    }
                }

                $testObject2 = @{
                    DomainName         = 'TestDomainName'
                    CertificateArn     = 'TestCertificateArn2'
                    InUseBy            = @(
                        'TestCertificateUser2',
                        'TestCertificateUser2-loadbalancer'
                    )
                    NotAfter           = @{
                        Date = 'TestDate'
                    }
                    RenewalEligibility = @{
                        Value = 'TestRenewalEligibility'
                    }
                }

                return @($testObject, $testObject2)
            }

            $result = Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Region 'us-fake-1' -Verbose
            $result | Should -HaveCount 2

            Mock -CommandName Get-ACMCertificateDetailsListByName -ModuleName $moduleForMock -MockWith {
                $testObject = @{
                    DomainName         = 'TestDomainName'
                    CertificateArn     = 'TestCertificateArn'
                    InUseBy            = @(
                        'TestCertificateUser',
                        'TestCertificateUser-loadbalancer'
                    )
                    NotAfter           = @{
                        Date = 'TestDate'
                    }
                    RenewalEligibility = @{
                        Value = 'TestRenewalEligibility'
                    }
                }

                return @($testObject)
            }
        }

        It 'Returns An Empty Array When No Certificates Are Found' {

            Mock -CommandName Get-ACMCertificateDetailsListByName -ModuleName $moduleForMock -MockWith {
                return @()
            }

            $result = Get-ACMCertificateBindingList -DomainName 'TestDomainName' -ProfileName 'temp-test1' -Region 'us-fake-1' -Verbose
            $result | Should -HaveCount 0

            Mock -CommandName Get-ACMCertificateDetailsListByName -ModuleName $moduleForMock -MockWith {
                $testObject = @{
                    DomainName         = 'TestDomainName'
                    CertificateArn     = 'TestCertificateArn'
                    InUseBy            = @(
                        'TestCertificateUser',
                        'TestCertificateUser-loadbalancer'
                    )
                    NotAfter           = @{
                        Date = 'TestDate'
                    }
                    RenewalEligibility = @{
                        Value = 'TestRenewalEligibility'
                    }
                }

                return @($testObject)
            }
        }
    }
}