[cmdletbinding()]

 Param($appName, $merchantId)

# Sets a text to a given value.
function Update-Text()
{
	param(
		[String] $TargetFileName, 
		[String] $FindText, 
		[String] $ReplaceText)
		
	if (-not(Test-Path -Path $TargetFileName)) {
		Write-Host "File " + $TargetFileName + " not found!"
		return -1
	}
	
	((Get-Content -path $TargetFileName -Raw) -replace $FindText, $ReplaceText) | Set-Content -Path $TargetFileName -Encoding utf8 -NoNewline
	return 0
}

# Sets merchant-id for a single app to a given value.
function Set-MerchantId()
{
	param(
		[String] $ProjectName,
		[String] $MerchantId)

	if ($MerchantId.Length -le 2)
	{
		Write-Host "Merchant id api key must not be of lenght <= 2"
		return -1
	}
	$fileName = Convert-Path ('.\' + $ProjectName + '\ShareeBike\App.xaml.cs')

	$retVal = Update-Text $fileName "const string MERCHANTID = `".*`"" "const string MERCHANTID = `"$MerchantId`""
	if ($retVal -ne 0)
	{
		return $retVal
	}
	Write-Host "File `"$fileName`" updated sucessfully (.."$MerchantId.Substring($MerchantId.Length - 2, 2)")." 
	return 0  
  }

return Set-MerchantId $appName $merchantId