# Install-GeoVLogSvc.ps1
param (
    [string]$ExePath = "$PSScriptRoot\..\bin\Release\net8.0-windows\GeoVLogSvc.exe",
    [string]$ServiceName = "GeoVLogSvc",
    [string]$DisplayName = "GeoVLog Sensor Logger",
    [string]$Description = "Logs flight sensor data to HDF5 and encrypts the manifest on shutdown.",
    [int]$PreShutdownTimeoutMS = 60000  # 60 seconds
)

function Ensure-Admin {
    if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) {
        Write-Error "⚠ This script must be run as Administrator!"
        exit 1
    }
}

function Create-Service {
    Write-Host "🔧 Creating service '$ServiceName'..."
    sc.exe create $ServiceName binPath= "`"$ExePath`"" start= delayed-auto DisplayName= "`"$DisplayName`""
    sc.exe description $ServiceName "$Description"
    sc.exe failure $ServiceName reset= 86400 actions= restart/5000/restart/10000/restart/60000
    sc.exe sidtype $ServiceName unrestricted
}

function Set-PreShutdownTimeout {
    $regPath = "HKLM:\SYSTEM\CurrentControlSet\Services\$ServiceName"
    if (-not (Test-Path $regPath)) {
        Write-Warning "❗Service registry key not found, cannot set PreShutdownTimeout."
        return
    }
    Set-ItemProperty -Path $regPath -Name PreshutdownTimeout -Value $PreShutdownTimeoutMS -Type DWord
    Write-Host "🕒 PreShutdownTimeout set to $PreShutdownTimeoutMS ms"
}

function Register-EventLogSource {
    if (-not [System.Diagnostics.EventLog]::SourceExists($ServiceName)) {
        New-EventLog -LogName Application -Source $ServiceName
        Write-Host "📝 Registered EventLog source: $ServiceName"
    } else {
        Write-Host "✅ EventLog source already exists."
    }
}

function Start-ServiceSafe {
    Write-Host "🚀 Starting service..."
    Start-Service -Name $ServiceName
}

Ensure-Admin
Create-Service
Set-PreShutdownTimeout
Register-EventLogSource
Start-ServiceSafe

Write-Host "`n✅ Service '$ServiceName' installed and running successfully."