function Get-HardwareInfo {
    [CmdletBinding()]
    param()

    $info = [ordered]@{
        Manufacturer = "Inconnu"
        Model        = "Inconnu"
        SerialNumber = "Inconnu"
        Firmware     = "Inconnu"
        Architecture = $env:PROCESSOR_ARCHITECTURE
        WinPE        = $false
        Disks        = @()
        Errors       = @()
    }

    # Fabricant et modele du PC
    try {
        $computer = Get-CimInstance `
            -ClassName Win32_ComputerSystem `
            -ErrorAction Stop

        if ($computer.Manufacturer) {
            $info.Manufacturer = $computer.Manufacturer.Trim()
        }

        if ($computer.Model) {
            $info.Model = $computer.Model.Trim()
        }
    }
    catch {
        $info.Errors += "Modele du PC : $($_.Exception.Message)"
    }

    # Numero de serie
    try {
        $bios = Get-CimInstance `
            -ClassName Win32_BIOS `
            -ErrorAction Stop

        if ($bios.SerialNumber) {
            $info.SerialNumber = $bios.SerialNumber.Trim()
        }
    }
    catch {
        $info.Errors += "Numero de serie : $($_.Exception.Message)"
    }

    # Detection du firmware
    try {
        $firmwareKey = Get-ItemProperty `
            -Path "HKLM:\SYSTEM\CurrentControlSet\Control" `
            -Name PEFirmwareType `
            -ErrorAction Stop

        switch ([int]$firmwareKey.PEFirmwareType) {
            1 { $info.Firmware = "BIOS (Legacy)" }
            2 { $info.Firmware = "UEFI" }
            default { $info.Firmware = "Indetermine" }
        }
    }
    catch {
        $info.Errors += "Mode firmware indisponible"
    }

    # Detection de WinPE
    $info.WinPE = Test-Path `
        "HKLM:\SYSTEM\CurrentControlSet\Control\MiniNT"

    # Inventaire des disques physiques
    try {
        $disks = @(Get-Disk -ErrorAction Stop)

        foreach ($disk in $disks) {
            $operationalStatus = @($disk.OperationalStatus | ForEach-Object { [string]$_ } | Where-Object { -not [string]::IsNullOrWhiteSpace($_) })
            $status = if ($operationalStatus.Count -gt 0) { $operationalStatus -join ', ' } else { 'Inconnu' }

            $info.Disks += [PSCustomObject]@{
                Index         = [int]$disk.Number
                Model         = [string]$disk.FriendlyName
                SizeBytes     = [long]$disk.Size
                SizeGB        = [math]::Round(
                    ([double]$disk.Size / 1GB), 1
                )
                BusType       = [string]$disk.BusType
                Status        = $status
                HealthStatus  = [string]$disk.HealthStatus
            }
        }
    }
    catch {
        $info.Errors += "Inventaire des disques : $($_.Exception.Message)"
    }

    # Retourner un objet exploitable par les autres modules
    [PSCustomObject]$info
}

function Write-DeployInventory {
    param(
        [Parameter(Mandatory=$true)][string]$InventoryDir,
        [Parameter(Mandatory=$true)][string]$InventoryFile,
        [AllowNull()]$HardwareInfo,
        [AllowNull()][string]$DeploymentIPv4,
        [AllowNull()][string]$VncPassword,
        [AllowNull()][scriptblock]$LogAction = $null
    )
    try {
        if (-not (Test-Path -LiteralPath $InventoryDir -PathType Container)) {
            New-Item -Path $InventoryDir -ItemType Directory -Force | Out-Null
        }
        $inventory = [ordered]@{
            GeneratedAt = (Get-Date).ToString('o')
            DeploymentIPv4 = $DeploymentIPv4
            VncPassword = $VncPassword
            Hardware = $HardwareInfo
        }
        $json = $inventory | ConvertTo-Json -Depth 8
        Set-Content -LiteralPath $InventoryFile -Value $json -Encoding UTF8

        # Nettoyer les anciens exports séparés après l'écriture de l'inventaire consolidé.
        $legacyInventoryFiles = @(
            (Join-Path $env:TEMP 'HardwareInfo.json'),
            (Join-Path $InventoryDir 'hardware.json')
        )
        foreach ($legacyFile in $legacyInventoryFiles) {
            if (Test-Path -LiteralPath $legacyFile -PathType Leaf) {
                try {
                    Remove-Item -LiteralPath $legacyFile -Force -ErrorAction Stop
                } catch {
                    if ($LogAction) { & $LogAction "Impossible de supprimer l'ancien export d'inventaire '$legacyFile' : $($_.Exception.Message)" 'WARNING' }
                }
            }
        }
    } catch {
        if ($LogAction) { & $LogAction "Impossible d'écrire l'inventaire temporaire : $($_.Exception.Message)" 'WARNING' }
    }
}

function Get-SelectedDeployDiskInfo {
    param(
        [AllowNull()]$HardwareInfo,
        [Parameter(Mandatory=$true)][int]$DiskIndex
    )
    if ($null -eq $HardwareInfo) { return $null }
    $matches = @($HardwareInfo.Disks | Where-Object { [int]$_.Index -eq $DiskIndex } | Select-Object -First 1)
    if ($matches.Count -gt 0) { return $matches[0] }
    return $null
}
Export-ModuleMember -Function Get-HardwareInfo, Write-DeployInventory, Get-SelectedDeployDiskInfo