Set-Location C:
$ErrorActionPreference = "Stop"

# VARIABLES

$query = "select SettingValue from cfg.Settings
where SettingId like 'Values.Modules.Replication.DbInitializationBackupPath%'
and len(SettingValue) > 1"
$erroronscript = 0
$errortext = ''
$snapshotLocation = ''
$snapshotHash =''

#Get configs from SQL
$connectionString = "Server='.\apssql';Database='ActiveSystemServer';Integrated Security=True;"
$connection = New-Object System.Data.SqlClient.SqlConnection
$connection.ConnectionString = $connectionString
$connection.Open()
$command = $connection.CreateCommand()
$command.CommandText = $query
$adapter = New-Object System.Data.sqlclient.sqlDataAdapter $command
$dataset = New-Object System.Data.DataSet
$adapter.Fill($dataSet) | Out-Null
$data = $dataset.Tables[0]
$workFolder=""


#get snapshot location
$results = Invoke-Sqlcmd -ServerInstance .\apssql -Database master -query "EXEC sp_helpdistributor"
$snapshotLocation = $results.directory
$workFolder = "$snapshotLocation\wrk_zip"

# Get database version
$query2 = "SELECT  ActivePos_write.upd.DatabaseVersion()"
$command2 = New-Object System.Data.SqlClient.SqlCommand($query2,$connection)

$aposVersion = $command2.ExecuteScalar()

#create needed structure in c:\temp\work_repl
$snapshotLocalDirName = Get-ChildItem -Path $snapshotLocation\unc\*_ACTIVEPOSTRAN | Select-Object -ExpandProperty Name 
New-Item -ItemType Directory -Force $workFolder\unc\$snapshotLocalDirName\$snapshotName

#let some time for the FS to settle, to avoid directory not found exceptions
start-sleep -Seconds 3

#find latest snapshot available
$snapshotName = Get-ChildItem -Path $snapshotLocation\unc\*_ACTIVEPOSTRAN\*  | Sort-Object -Descending |Select-Object -First 1 -ExpandProperty Name

#copy latest snapshot to work folder
#copy-Item -Path "$snapshotLocation\unc\*_ACTIVEPOSTRAN\$snapshotName\*.*" -Destination "$workFolder\unc\$snapshotLocalDirName\$snapshotName\"
(Robocopy.exe $snapshotLocation\unc\*_ACTIVEPOSTRAN\$snapshotName\  $workFolder\unc\$snapshotLocalDirName\$snapshotName\ /MIR /R:3 /W:5)

#zip snapshot and folder structure
$compress = @{
  Path = "$workFolder\unc"
  CompressionLevel = "Fastest"
  DestinationPath = "$workFolder\snapshot_$aposVersion.zip"
}
Compress-Archive @compress -Force

#compute CRC
$snapshotHash = Get-FileHash -Path $workFolder\snapshot_$aposVersion.zip -Algorithm SHA512 | Select-Object -ExpandProperty Hash | out-file -FilePath $workFolder\snapshot_$aposVersion.crc -Force

#delete work folder
Remove-Item $workFolder\unc -Force -Recurse

# Get backup directory
$query3 = "SELECT  HCIP_value FROM HCITools.dbo.HCI_PARAMS WHERE HCIP_Key = 'BKP_DIR'"
$command3 = New-Object System.Data.SqlClient.SqlCommand($query3,$connection)
$source = $command3.ExecuteScalar()

$connection.close()

#copy every files to relevant shares
$jobs = foreach($dir in $data){
  $logFile = $dir.SettingValue -replace "[\\]" , ""
  $target = $dir.SettingValue
  $logfile = "/log:`"c:\temp\$logFile.txt`""
  $files = Get-ChildItem -Path $workFolder -Filter "snapshot*.*"

  if(!(test-path "$Target")){
    try{ 
        New-Item -ItemType Directory -Force -Path $Target -ErrorAction Stop
    }
    catch{
        $erroronscript = 1
        if($errortext -eq ''){ 
            $errortext = "Share is not reachable: $Target" 
        }
        else{ 
            $errortext = $errortext  + "`r`nShare is not reaechable: $Target" 
        }
    }
  }

  if(test-path "$Target"){
    $files | ForEach-Object {
        $testfile = $_.Directory

        if(!(test-path $testfile)){
            $erroronscript = 1
            if($errortext -eq ''){ 
                $errortext = "ActivePos_read file source is not accessible!" 
            }
            else{ 
                $errortext = $errortext  + "`r`nActivePos_read file source is not accessible!" 
            }
        }
        else{
            start-job -ArgumentList $_.Directory, $target, $_.Name, $logFile -ScriptBlock{
                param($source, $target, $testfile, $logFile )
                $copy = robocopy $source $target $testfile /r:5 /w:120 $logFile
                $LASTEXITCODE
            }
        }
    }

  }
}

$resultsjobs = Get-Job | Wait-Job | Receive-Job

foreach($resultjob in $resultsjobs){
    if($resultjob -gt 7){
        $errortext = "Robocopy exit code greater than 7!"
    }
}

Remove-Job *

if (Test-Path 'C:\Temp\PScopy.ps1') { Remove-Item 'C:\Temp\PScopy.ps1' -Force }

#delete generated local files
$files | Remove-Item

#purge old version snapshots on the share
Get-ChildItem -Path $target -Filter "snapshot*.*" -Exclude "*$aposVersion*" | Remove-Item

IF($errortext -ne ''){ throw($errortext)}