############################################################
# PART 7.1
#
# Veeam LogManager
############################################################

function Copy-VeeamSetupLogs {

    Write-Log "Sichere Veeam Setup Logs"

    $Source = "C:\ProgramData\Veeam\Setup\Temp"

    $Destination = Join-Path `
        $LogDir `
        "VeeamSetup"

    if(!(Test-Path $Source))
    {
        Write-Log "Keine Setup Logs gefunden."

        return
    }

    if(Test-Path $Destination)
    {
        Remove-Item `
            $Destination `
            -Recurse `
            -Force
    }

    Copy-Item `
        $Source `
        $Destination `
        -Recurse `
        -Force

    Write-Log "Setup Logs kopiert."

}
############################################################
# PART 7.2
#
# Part 7.2 – Logdatei suchen
############################################################

function Get-LatestSetupLog {

    $Folder = Join-Path `
        $LogDir `
        "VeeamSetup"

    if(!(Test-Path $Folder))
    {
        return $null
    }

    Get-ChildItem `
        $Folder `
        -Recurse `
        -Filter *.log |
        Sort-Object LastWriteTime -Descending |
        Select-Object -First 1

}
############################################################
# PART 7.3#
#
# Part 7.3 – Logdatei analysieren
############################################################

function Analyze-VeeamLog {

    param(

        [string]$LogFile

    )

    if(!(Test-Path $LogFile))
    {

        Write-Log "Keine Logdatei vorhanden."

        return

    }

    Write-Log "Analysiere Logdatei"

    $Content = Get-Content `
        $LogFile `
        -ErrorAction SilentlyContinue

    foreach($Line in $Content)
    {

        if($Line -match "SQL")
        {
            Write-Log "SQL Hinweis: $Line"
        }

        if($Line -match "Access denied")
        {
            Write-Log "Berechtigungsproblem: $Line"
        }

        if($Line -match "Return value 3")
        {
            Write-Log "MSI Fehler erkannt."
        }

        if($Line -match "failed")
        {
            Write-Log $Line
        }

        if($Line -match "Exception")
        {
            Write-Log $Line
        }

    }

}
############################################################
# PART 7.4
#
# PART 7.4 – ExitCode analysieren
############################################################

function Analyze-ExitCode {

    param(

        [int]$ExitCode

    )

    Write-Log "Installer ExitCode : $ExitCode"

    switch($ExitCode)
    {

        0
        {
            Write-Log "Installation erfolgreich."
        }

        3010
        {
            Write-Log "Neustart erforderlich."
        }

        1603
        {

            Write-Log "Fatal Error"

            Copy-VeeamSetupLogs

            $Log = Get-LatestSetupLog

            if($Log)
            {

                Analyze-VeeamLog `
                    $Log.FullName

            }

        }

        default
        {

            Write-Log "Unbekannter ExitCode"

            Copy-VeeamSetupLogs

        }

    }

}
############################################################
# PART 7.5
#
# PART 7.5 – Veeam Dienste prüfen
############################################################

function Test-VeeamServices {

    Write-Log "Prüfe Veeam Dienste"

    $Services = @(

        "VeeamBackupSvc",

        "VeeamBrokerSvc",

        "VeeamMountSvc"

    )

    foreach($Service in $Services)
    {

        $S = Get-Service `
            $Service `
            -ErrorAction SilentlyContinue

        if(!$S)
        {

            Write-Log "$Service nicht installiert."

            continue

        }

        Write-Log "$($S.Name) : $($S.Status)"

    }

}
############################################################
# PART 7.6
#
# PART 7.6 – Version prüfen
############################################################

function Get-VeeamVersion {

    $Exe =
    Join-Path `
    $InstallPath `
    "Backup\Veeam.Backup.Service.exe"

    if(Test-Path $Exe)
    {

        $Version =
        (Get-Item $Exe).VersionInfo.ProductVersion

        Write-Log "Veeam Version : $Version"

    }

}
############################################################
# PART 7.7
#
# Veeam Installation Engine
############################################################

function Install-Veeam {

    Write-Log "======================================="
    Write-Log "Starte Veeam Installation"
    Write-Log "======================================="

    $Arguments = @(
        "/AnswerFile"
        "`"$AnswerFile`""
        "/SkipNetworkLogonErrors"
    )

    $StartTime = Get-Date

    Write-Log "Installationsbeginn : $StartTime"

    try {

        $Process = Start-Process `
            -FilePath $VeeamInstaller `
            -ArgumentList $Arguments `
            -PassThru

    }
    catch {

        Stop-Installation "Installer konnte nicht gestartet werden.`n$($_.Exception.Message)"

    }

    Write-Log "PID : $($Process.Id)"

    while(!$Process.HasExited)
    {

        Write-Host "." -NoNewline

        Start-Sleep 10

        $Process.Refresh()

    }

    Write-Host ""

    $EndTime = Get-Date

    $Duration = New-TimeSpan `
        -Start $StartTime `
        -End $EndTime

    Write-Log "Installationsende : $EndTime"

    Write-Log ("Dauer : {0:hh\:mm\:ss}" -f $Duration)

    Analyze-ExitCode $Process.ExitCode

    if($Process.ExitCode -eq 0 -or
       $Process.ExitCode -eq 3010)
    {

        Test-VeeamServices

        Get-VeeamVersion

    }

}
############################################################
# PART 7.8
#
# PART 7.8 – Installationsreport
############################################################

function Show-InstallationSummary {

    Write-Host ""
    Write-Host "============================================="
    Write-Host "Installation abgeschlossen"
    Write-Host "============================================="
    Write-Host ""

    Write-Host "Computer"

    Write-Host "--------"

    Write-Host $env:COMPUTERNAME

    Write-Host ""

    Write-Host "SQL"

    Write-Host "----"

    Write-Host $SQLConnection

    Write-Host ""

    Write-Host "Installation"

    Write-Host "-------------"

    Write-Host $InstallPath

    Write-Host ""

    Write-Host "Catalog"

    Write-Host "-------"

    Write-Host $CatalogPath

    Write-Host ""

    Write-Host "IR Cache"

    Write-Host "--------"

    Write-Host $IRCachePath

    Write-Host ""

    Write-Host "Log"

    Write-Host "---"

    Write-Host "$LogDir\Install.log"

}
############################################################
# MAIN
#
# PART 7.9 – Gesamtablauf
############################################################

Invoke-SystemCheck

Invoke-Prerequisites

Initialize-AnswerFile

Install-Veeam

Show-InstallationSummary