# Usage: scoop cache show|rm [app]
# Summary: Show or clear the download cache
# Help: Scoop caches downloads so you don't need to download the same files
# when you uninstall and re-install the same version of an app.
#
# You can use
#     scoop cache show
# to see what's in the cache, and
#     scoop cache rm <app> to remove downloads for a specific app.
param($cmd, $app)

. "$psscriptroot\..\lib\help.ps1"

function cacheinfo($file) {
	$app, $version, $url = $file.name -split '#'
	$size = filesize $file.length
	return new-object psobject -prop @{ app=$app; version=$version; url=$url; size=$size }
}

function filesize($length) {
	$gb = [math]::pow(2, 30)
	$mb = [math]::pow(2, 20)
	$kb = [math]::pow(2, 10)

	if($length -gt $gb) {
		"{0:n1} GB" -f ($length / $gb)
	} elseif($length -gt $mb) {
		"{0:n1} MB" -f ($length / $mb)
	} elseif($length -gt $kb) {
		"{0:n1} KB" -f ($length / $kb)
	} else {
		"$($length) B"
	}
}

switch($cmd) {
	'rm' {
		if(!$app) { 'ERROR: <app> missing'; my_usage; exit 1 }
		rm "$scoopdir\cache\$app#*"
	}
	'show' {
		$files = @(gci "$scoopdir\cache" | ? { $_.name -match "^$app" })
		$total_length = ($files | measure length -sum).sum

		$f_app  = @{ expression={"$($_.app) ($($_.version))" }}
		$f_url  = @{ expression={$_.url};alignment='right'}
		$f_size = @{ expression={$_.size}; alignment='right'}


		$files | % { cacheinfo $_ } | ft $f_size, $f_app, $f_url -auto -hide

		"total: $($files.length) $(pluralize $files.length 'file' 'files'), $(filesize $total_length)"
	}
	default {
		"cache '$cmd' not supported"; my_usage; exit 1
	}
}

exit 0