Describe 'Install-WinAcme' {
    BeforeAll {
        function Uninstall-WinAcme {
            param (
                [string]$DestinationPath
            )

            # Remove the installation directory
            if (Test-Path -Path $DestinationPath) {
                Remove-Item -Path $DestinationPath -Recurse -Force
            }

            # Remove from PATH
            $env:PATH = $env:PATH -replace [regex]::Escape("$DestinationPath\"), ''
            [Environment]::SetEnvironmentVariable("Path", $env:PATH, [System.EnvironmentVariableTarget]::Machine)
        }

        # Clean up any existing win-acme installation
        Uninstall-WinAcme -DestinationPath 'C:\Program Files\win-acme'
        
        # Load the Install-WinAcme function
        Set-Item function:Install-WinAcme ([ScriptBlock]::Create((Get-Content -Raw 'windows\Install-WinAcme.ps1')))    
    }

    It 'Has the correct parameters' {
        $params = (Get-Command Install-WinAcme).Parameters

        $params.ContainsKey('DestinationPath') | Should -Be $true
        $params['DestinationPath'].ParameterType.Name | Should -Be 'String'
    }

    It 'Should download and install win-acme without errors' {
        { Install-WinAcme -DestinationPath 'C:\Program Files\win-acme' } | Should -Not -Throw
    }

    It 'Should add win-acme to the system PATH' {
        $env:PATH | Should -Match 'C:\\Program Files\\win-acme\\'
    }

    It 'Should create the win-acme installation directory' {
        Test-Path -Path 'C:\Program Files\win-acme' | Should -Be $true
    }

    It 'Should create the wacs executable in the installation directory' {
        Test-Path -Path 'C:\Program Files\win-acme\wacs.exe' | Should -Be $true
    }

    AfterAll {
        Uninstall-WinAcme -DestinationPath 'C:\Program Files\win-acme'
    }
}