#Requires -Version 5.1
<#
.SYNOPSIS
    Pester v5 tests for scripts/New-BuildVM.ps1
#>

BeforeAll {
    $script:ScriptPath   = Join-Path $PSScriptRoot '..\scripts\New-BuildVM.ps1'
    $script:CloneBaseDir = Join-Path $env:TEMP "CI-Tests-CloneBase-$PID"
    New-Item -ItemType Directory -Path $script:CloneBaseDir -Force | Out-Null

    # Fake vmrun.cmd — exits with %FAKE_VMRUN_EXIT% (default 0)
    # On success it also creates the destination VMX so the post-clone Test-Path passes.
    $script:FakeVmrun = Join-Path $env:TEMP "fake-vmrun-$PID.cmd"
    Set-Content $script:FakeVmrun -Value @'
@echo off
if "%FAKE_VMRUN_EXIT%"=="" ( set _exit=0 ) else ( set _exit=%FAKE_VMRUN_EXIT% )
if "%_exit%"=="0" (
    REM Create the destination VMX file so the caller's Test-Path check passes.
    REM The destination path is the 4th positional arg (after -T ws clone <template>).
    echo. > %5
)
exit /b %_exit%
'@

    # Fake template VMX — just needs to exist
    $script:FakeTemplate = Join-Path $env:TEMP "fake-template-$PID.vmx"
    Set-Content $script:FakeTemplate -Value 'config.version = "8"'
}

AfterAll {
    Remove-Item $script:CloneBaseDir -Recurse -Force -ErrorAction SilentlyContinue
    Remove-Item $script:FakeVmrun    -Force -ErrorAction SilentlyContinue
    Remove-Item $script:FakeTemplate -Force -ErrorAction SilentlyContinue
    $env:FAKE_VMRUN_EXIT = $null
}

# ─────────────────────────────────────────────────────────────────────────────
Describe 'New-BuildVM — parameter validation' {
    It 'throws when TemplatePath does not exist' {
        {
            & $script:ScriptPath `
                -TemplatePath  'C:\DoesNotExist\template.vmx' `
                -CloneBaseDir  $script:CloneBaseDir `
                -JobId         'test-job-1' `
                -VmrunPath     $script:FakeVmrun
        } | Should -Throw
    }
}

# ─────────────────────────────────────────────────────────────────────────────
Describe 'New-BuildVM — vmrun failure' {
    It 'throws and cleans up clone dir when vmrun clone exits non-zero' {
        $env:FAKE_VMRUN_EXIT = '1'
        {
            & $script:ScriptPath `
                -TemplatePath  $script:FakeTemplate `
                -CloneBaseDir  $script:CloneBaseDir `
                -JobId         'test-job-fail' `
                -VmrunPath     $script:FakeVmrun
        } | Should -Throw -ExpectedMessage '*clone failed*'

        # No leftover clone dir
        $leftover = Get-ChildItem $script:CloneBaseDir -Directory |
            Where-Object { $_.Name -like '*test-job-fail*' }
        $leftover | Should -BeNullOrEmpty
    }

    AfterEach { $env:FAKE_VMRUN_EXIT = $null }
}

# ─────────────────────────────────────────────────────────────────────────────
Describe 'New-BuildVM — clone name format' {
    It 'clone folder is named Clone_{JobId}_{yyyyMMdd_HHmmss}' {
        $env:FAKE_VMRUN_EXIT = '0'
        $vmx = & $script:ScriptPath `
            -TemplatePath  $script:FakeTemplate `
            -CloneBaseDir  $script:CloneBaseDir `
            -JobId         'run-42' `
            -VmrunPath     $script:FakeVmrun

        $vmx | Should -Match 'Clone_run-42_\d{8}_\d{6}'
    }

    It 'returns a string ending in .vmx' {
        $env:FAKE_VMRUN_EXIT = '0'
        $vmx = & $script:ScriptPath `
            -TemplatePath  $script:FakeTemplate `
            -CloneBaseDir  $script:CloneBaseDir `
            -JobId         'run-99' `
            -VmrunPath     $script:FakeVmrun

        $vmx | Should -Match '\.vmx$'
    }

    AfterEach {
        $env:FAKE_VMRUN_EXIT = $null
        # Clean up clones created by successful tests
        Get-ChildItem $script:CloneBaseDir -Directory -ErrorAction SilentlyContinue |
            Remove-Item -Recurse -Force -ErrorAction SilentlyContinue
    }
}