param(
	[Parameter(Mandatory=$true)]
    [string]$url
)

function Write-Log($msg) {
    Write-Host $msg -foregroundcolor green
    ($msg) | Out-File "log-update-filenotfound.txt" -Append
}

function Update-FileNotFound($site) {
	<#$pagesUrl = "Sivut"
	if ($site.RootWeb.Language -eq 1033) {
		$pagesUrl = "Pages"
	}#>
	if ($site.ID -eq $site.WebApplication.Sites[0].ID -or $site.Url -eq "http://intra.jarjestotalo.fi") {
		#$expectedUrl = "/" + $pagesUrl + "/PageNotFoundError.aspx"
		$expectedUrl = "/_layouts/15/Taloyhtio/Common/PageNotFound.aspx"
	} else {
		#$expectedUrl = $site.ServerRelativeUrl + "/" + $pagesUrl + "/PageNotFoundError.aspx"
		$expectedUrl = $site.ServerRelativeUrl + "/_layouts/15/Taloyhtio/Common/PageNotFound.aspx"
	}
	
	#Write-Log ($expectedUrl)
	
	if ($site.FileNotFoundUrl -ne $null -and $site.FileNotFoundUrl.ToLower() -eq $expectedUrl.ToLower()) {
		return
	}
	
	Write-Log ("Update " + $site.Url + " from " + $site.FileNotFoundUrl + " to " + $expectedUrl)
	$site.FileNotFoundUrl = $expectedUrl
	#$site.Update()
	#Write-Log ($_.Url + "`t" + $_.FileNotFoundUrl + "`t" + $expectedUrl)
}

$webApp = Get-SPWebApplication $url
$webApp.Sites | ForEach-Object { Update-FileNotFound $_ }

#$site = Get-SPSite $url
#Add-Form-Filling $site