Param(
  [string] $GuardianCliLocation,
  [string] $Repository,
  [string] $BranchName="master",
  [string] $WorkingDirectory,
  [string] $DncEngAccessToken,
  [string] $GuardianLoggerLevel="Standard"
)

$ErrorActionPreference = "Stop"
Set-StrictMode -Version 2.0
$LASTEXITCODE = 0

# Construct basic auth from AzDO access token; construct URI to the repository's gdn folder stored in that repository; construct location of zip file
$encodedPat = [Convert]::ToBase64String([System.Text.Encoding]::ASCII.GetBytes(":$DncEngAccessToken"))
$escapedRepository = [Uri]::EscapeDataString("/$Repository/$BranchName/.gdn")
$uri = "https://dev.azure.com/dnceng/internal/_apis/git/repositories/sdl-tool-cfg/Items?path=$escapedRepository&versionDescriptor[versionOptions]=0&`$format=zip&api-version=5.0-preview.1"
$zipFile = "$WorkingDirectory/gdn.zip"

Add-Type -AssemblyName System.IO.Compression.FileSystem
$gdnFolder = (Join-Path $WorkingDirectory ".gdn")
Try
{
  # We try to download the zip; if the request fails (e.g. the file doesn't exist), we catch it and init guardian instead
  Write-Host "Downloading gdn folder from internal config repostiory..."
  Invoke-WebRequest -Headers @{ "Accept"="application/zip"; "Authorization"="Basic $encodedPat" } -Uri $uri -OutFile $zipFile
  if (Test-Path $gdnFolder) {
    # Remove the gdn folder if it exists (it shouldn't unless there's too much caching; this is just in case)
    Remove-Item -Force -Recurse $gdnFolder
  }
  [System.IO.Compression.ZipFile]::ExtractToDirectory($zipFile, $WorkingDirectory)
  Write-Host $gdnFolder
} Catch [System.Net.WebException] {
  # if the folder does not exist, we'll do a guardian init and push it to the remote repository
  Write-Host "Initializing Guardian..."
  Write-Host "$GuardianCliLocation init --working-directory $WorkingDirectory --logger-level $GuardianLoggerLevel"
  & $GuardianCliLocation init --working-directory $WorkingDirectory --logger-level $GuardianLoggerLevel
  if ($LASTEXITCODE -ne 0) {
    Write-Error "Guardian init failed with exit code $LASTEXITCODE."
  }
  # We create the mainbaseline so it can be edited later
  Write-Host "$GuardianCliLocation baseline --working-directory $WorkingDirectory --name mainbaseline"
  & $GuardianCliLocation baseline --working-directory $WorkingDirectory --name mainbaseline
  if ($LASTEXITCODE -ne 0) {
    Write-Error "Guardian baseline failed with exit code $LASTEXITCODE."
  }
  & $(Join-Path $PSScriptRoot "push-gdn.ps1") -Repository $Repository -BranchName $BranchName -GdnFolder $gdnFolder -DncEngAccessToken $DncEngAccessToken -PushReason "Initialize gdn folder"
}