<#
.SYNOPSIS
Milestone XProtect Incident Report Generator

.DESCRIPTION
Analyse les événements Windows liés à Milestone XProtect :
- Redémarrages serveur
- Crash Recording Server
- Crash VideoOS
- Erreurs disque (Event ID 7)

Génère :
- Synthèse console
- 3 dernières erreurs significatives
- Historique complet structuré

.PARAMETER Days
Nombre de jours à analyser (défaut : 4)

.AUTHOR
Sébastien Couratin – Semper Connect

.LICENSE
GNU AGPL-3.0
#>

param(
    [int]$Days = 4,
    [int]$DetailCount = 3
)


# Encodage UTF8 console
chcp 65001 > $null
[Console]::OutputEncoding = [System.Text.Encoding]::UTF8

$start = (Get-Date).AddDays(-$Days)

Write-Verbose "Analyse des $Days derniers jours"
Write-Verbose "Date de début : $start"

# ==========================================================
# 🔎 RÉCUPÉRATION DES ÉVÉNEMENTS
# ==========================================================

$reboots = Get-WinEvent -FilterHashtable @{
    LogName='System'
    StartTime=$start
} -ErrorAction SilentlyContinue | Where-Object {
    ($_.Id -eq 12 -and $_.ProviderName -eq "Microsoft-Windows-Kernel-General") -or
    ($_.Id -eq 41) -or
    ($_.Id -eq 1074)
}

$recordingCrash = Get-WinEvent -FilterHashtable @{
    LogName='System'
    Id=7031
    StartTime=$start
} -ErrorAction SilentlyContinue | Where-Object {
    $_.Message -like "*Recording Server*"
}

$videoOSCrash = Get-WinEvent -FilterHashtable @{
    LogName='Application'
    Id=1000
    StartTime=$start
} -ErrorAction SilentlyContinue | Where-Object {
    $_.Message -like "*VideoOS*"
}

$diskErrors = Get-WinEvent -FilterHashtable @{
    LogName='System'
    Id=7
    StartTime=$start
} -ErrorAction SilentlyContinue

if (-not $diskErrors) { $diskErrors = @() }

# ==========================================================
# 🧠 CONSTRUCTION HISTORIQUE STRUCTURÉ
# ==========================================================

$allEvents = @()

foreach ($evt in $videoOSCrash) {
    $allEvents += [PSCustomObject]@{
        Time = $evt.TimeCreated
        Type = "CRASH VIDEOOS"
        Severity = "CRITICAL"
        Message = $evt.Message
    }
}

foreach ($evt in $recordingCrash) {
    $allEvents += [PSCustomObject]@{
        Time = $evt.TimeCreated
        Type = "CRASH RECORDING"
        Severity = "CRITICAL"
        Message = $evt.Message
    }
}

foreach ($evt in $diskErrors) {
    $allEvents += [PSCustomObject]@{
        Time = $evt.TimeCreated
        Type = "ERREUR DISQUE"
        Severity = "CRITICAL"
        Message = $evt.Message
    }
}

foreach ($evt in $reboots) {
    $allEvents += [PSCustomObject]@{
        Time = $evt.TimeCreated
        Type = "REDÉMARRAGE SERVEUR"
        Severity = "WARNING"
        Message = "EventID $($evt.Id)"
    }
}

$allEvents = $allEvents | Sort-Object Time

# ==========================================================
# 🎯 3 DERNIÈRES ERREURS SIGNIFICATIVES
# ==========================================================

$lastCritical = $allEvents |
    Where-Object {$_.Severity -eq "CRITICAL"} |
    Sort-Object Time -Descending |
    Select-Object -First $DetailCount

# ==========================================================
# 📊 SYNTHÈSE CONSOLE
# ==========================================================

Write-Host ""
Write-Host "==============================================="
Write-Host " SYNTHÈSE INCIDENTS MILESTONE XPROTECT"
Write-Host "==============================================="
Write-Host "Période analysée : $Days jours"
Write-Host ""

Write-Host "Redémarrages serveur :" $reboots.Count
Write-Host "Crash Recording Server :" $recordingCrash.Count
Write-Host "Crash Application VideoOS :" $videoOSCrash.Count
Write-Host "Erreurs disque (ID 7) :" $diskErrors.Count
Write-Host ""

if ($lastCritical.Count -gt 0) {
    Write-Host "$DetailCount dernières erreurs significatives :"
    $lastCritical | Format-Table Time, Type -AutoSize
}

# ==========================================================
# 🧾 GÉNÉRATION RAPPORT
# ==========================================================

$reportDir = Join-Path $PSScriptRoot "..\reports"

if (-not (Test-Path $reportDir)) {
    New-Item -ItemType Directory -Path $reportDir | Out-Null
}

$reportPath = Join-Path $reportDir ("Milestone_Report_{0}.txt" -f (Get-Date -Format 'yyyyMMdd_HHmm'))

$report = @()
$report += "==============================================="
$report += "RAPPORT INCIDENTS MILESTONE XPROTECT"
$report += "==============================================="
$report += "Date génération : $(Get-Date)"
$report += "Période analysée : $Days jours"
$report += ""
$report += "Redémarrages serveur : $($reboots.Count)"
$report += "Crash Recording Server : $($recordingCrash.Count)"
$report += "Crash Application VideoOS : $($videoOSCrash.Count)"
$report += "Erreurs disque (ID 7) : $($diskErrors.Count)"
$report += ""

$report += "==== $DetailCount DERNIÈRES ERREURS SIGNIFICATIVES ===="

foreach ($err in $lastCritical) {
    $report += "--------------------------------"
    $report += "Date : $($err.Time)"
    $report += "Type : $($err.Type)"
    $report += "Message : $($err.Message)"
}

$report += ""
$report += "==== HISTORIQUE COMPLET STRUCTURÉ ===="

foreach ($evt in $allEvents) {
    $report += "$($evt.Time) | $($evt.Type) | $($evt.Severity)"
}

$report | Out-File -FilePath $reportPath -Encoding UTF8

Write-Host ""
Write-Host "Rapport généré :" $reportPath
Write-Host ""