$user = "1"
$pass = "2"
$secpasswd = ConvertTo-SecureString $pass -AsPlainText -Force
$credential = New-Object –TypeName "System.Management.Automation.PSCredential" –ArgumentList $user, $secpasswd
$baseUrl = "https://test.cloudapp.azure.com"

function Get-RootWebStatus($baseUrl) {
     $KeepLooking = $true                       # Should we continue to retry?
     $counter = 1                               # How many times we've tried
     $RetryLimit = 5                            # Max number of retries 
     $SleepInterval = 5                         # How long to sleep between retries 
     $StartTime = Get-Date                      # When we started 
     while ($KeepLooking) {
         write-output "$(Get-Date -format 'g') - Querying $baseUrl to see if available."
         try { 
             $response = Invoke-WebRequest $baseUrl 
             write-output "$(Get-Date -format 'g') - Web request status: $($Response.Statuscode)"
             if ($Response.Statuscode -eq 200) {
                 write-output "$(Get-Date -format 'g') - Web site is alive!"
                 $KeepLooking = $false
                 continue 
             }
         } 
         catch { 
             write-output "$(Get-Date -format 'g') - Error! $($_.Exception.Message)"      
         }
       $counter++  | Out-Null
         if ($counter -gt $RetryLimit) {
             write-output "$(Get-Date -format 'g') - RetryLimit exceeded. Giving up.."
             $KeepLooking = $false
             continue
         }
         start-sleep $SleepInterval 
     }
     write-output "$(Get-Date -format 'g') - Execution time was $((New-TimeSpan -start $StartTime -end (Get-Date)).seconds) seconds"  
 }  
          
 Get-RootWebStatus $baseUrl # Base Url status is completed, Once it is passed, it should check for the login credentials.
 $suburl = Get-Content -Raw -Path "C:\pipelinetask\suburl.json" | ConvertFrom-Json
 $Loginpage = $baseUrl+$suburl.Login.url
 Write-Host "Login page Url is $Loginpage"

 $params = @{uri = $Loginpage;
                   Method = 'POST'; #(or POST, or whatever)
                   Headers = @{Authorization = 'Basic ' + [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes("$($user):$($secpasswd)"));
           } #end headers hash table
   } #end $params hash table

$var = Invoke-RestMethod @params
$var1 = Invoke-WebRequest @params
$var
Write-Host "Authentication Done"
# Need to check the other suburls after Login is successful and authenticated with correct username/password
#We need to provide if condition here if the login is successfully authenticated
$suburl = Get-Content -Raw -Path "C:\pipelinetask\suburl.json" | ConvertFrom-Json
function Get-SubUrlResponse($hostUri, $Relativeurl, $authHeader)
 {
      $requestUri = $hostUri+$Relativeurl
      $attempts = 5
        
     for ($i = 1; $i -le $attempts; $i++) {
         try {
             $reply = Invoke-WebRequest -Uri $requestUri -Method GET  # -ErrorAction STOP
             Write-Host "$($i) attempt = Request $($requestUri)  "

             if ($reply.StatusCode -eq 200) 
             {
                 Write-Host "$($i) attempt = Request StatusCode: $($reply.StatusCode), done!" -ForegroundColor DarkGreen
                 break;
             }
             else  {
                 Write-Host "$($i) attempt = Request StatusCode: $($reply.StatusCode), :-( " -ForegroundColor DarkYellow
             }
         }
         catch {
             $attempts = $i  # preserve the number of tries
             Write-Host "Error: $($_.Exception)" -ForegroundColor Red
         }
         Write-Host "waiting $($intervalSec) sec till next attempt."
         Start-Sleep -Seconds $intervalSec
     }
  }
    
 foreach ($url in $suburl.urls) {
     $resultVar = Get-SubUrlResponse $baseUrl $url.url
       
 }