$ZipNames = @(
    "gong_libretro.dll.zip",
    "squirreljme_libretro.dll.zip",
    "potator_libretro.dll.zip",
    "freeintv_libretro.dll.zip"
)
$CoreDest = "${PSScriptRoot}\cores\"
$CoresBaseUri = "https://buildbot.libretro.com/nightly/windows/x86_64/latest/"
$LogDest = "${PSScriptRoot}\core_update.log"

try
{
    Start-Transcript -Path $LogDest -UseMinimalHeader
}
catch [System.Management.Automation.ParameterBindingException]
{
    Start-Transcript -Path $LogDest
}


foreach ($zip in $ZipNames)
{
    $dll = $zip -replace '\.zip$', ''
    $params = @{
        "LiteralPath" = (Join-Path $CoreDest $dll)
        "ErrorAction" = "SilentlyContinue"
    }
    if (($creationTime = (Get-Item @params).CreationTime) -and
        (New-TimeSpan $creationTime (Get-Date)).Days -lt 7)
    {
        Write-Host "Skipping core ${dll}: It's not older than a week."
        continue
    }

    $params = @{
        "Uri"     = ($CoresBaseUri + $zip)
        "OutFile" = ($CoreDest + $zip)
        "Verbose" = $true
    }
    try
    {
        Invoke-WebRequest @params
    }
    catch
    {
        Write-Host "Skipping core ${dll}: Failed to download ${zip}."
        continue
    }

    $params = @{
        "LiteralPath"     = ($CoreDest + $zip)
        "DestinationPath" = $CoreDest
        "Force"           = $true
        "Verbose"         = $true
    }
    Expand-Archive @params
    Remove-Item ($CoreDest + $zip) -Verbose
}

Stop-Transcript