param(
  [Parameter(Mandatory = $true)]
  [string]$ServerUrl,

  [string]$ApiUrl = "",

  [Parameter(Mandatory = $true)]
  [string]$AgentId,

  [string]$TaskName = "SferaWindowsAgent",

  [string]$ServiceName = "SferaWindowsAgent",

  [string]$InstallDir = "C:\ProgramData\SFERA\WindowsAgent",

  [string[]]$NetworkRoot = @()
)

$ErrorActionPreference = "Stop"

if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
  throw "Run this installer in PowerShell as Administrator."
}

$sourceScript = Join-Path $PSScriptRoot "sfera-windows-agent.ps1"
if (!(Test-Path -LiteralPath $sourceScript -PathType Leaf)) {
  throw "Agent script not found: $sourceScript"
}

New-Item -ItemType Directory -Force -Path $InstallDir | Out-Null
$targetScript = Join-Path $InstallDir "sfera-windows-agent.ps1"
$configPath = Join-Path $InstallDir "agent-config.json"
Copy-Item -LiteralPath $sourceScript -Destination $targetScript -Force
$config = [ordered]@{
  server_url = $ServerUrl.TrimEnd("/")
  api_url = $ApiUrl.TrimEnd("/")
  agent_id = $AgentId
  poll_seconds = 5
  network_roots = @($NetworkRoot)
}
$config | ConvertTo-Json -Depth 8 | Set-Content -LiteralPath $configPath -Encoding UTF8

$existingTask = Get-ScheduledTask -TaskName $TaskName -ErrorAction SilentlyContinue
if ($existingTask) {
  Stop-ScheduledTask -TaskName $TaskName -ErrorAction SilentlyContinue
  Unregister-ScheduledTask -TaskName $TaskName -Confirm:$false
}

$arguments = @(
  "-STA",
  "-NoProfile",
  "-WindowStyle", "Hidden",
  "-ExecutionPolicy", "Bypass",
  "-File", "`"$targetScript`"",
  "-ConfigPath", "`"$configPath`""
)

$existing = Get-Service -Name $ServiceName -ErrorAction SilentlyContinue
if ($existing) {
  sc.exe stop $ServiceName | Out-Null
  sc.exe delete $ServiceName | Out-Null
  Start-Sleep -Seconds 2
}

$powerShellPath = Join-Path $env:SystemRoot "System32\WindowsPowerShell\v1.0\powershell.exe"
if (!(Test-Path -LiteralPath $powerShellPath -PathType Leaf)) {
  $powerShellPath = Join-Path $PSHOME "powershell.exe"
}
$action = New-ScheduledTaskAction -Execute $powerShellPath -Argument ($arguments -join " ")
$trigger = New-ScheduledTaskTrigger -AtLogOn -User "$env:USERDOMAIN\$env:USERNAME"
$settings = New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -ExecutionTimeLimit ([TimeSpan]::Zero) -RestartCount 3 -RestartInterval (New-TimeSpan -Minutes 1)
$principal = New-ScheduledTaskPrincipal -UserId "$env:USERDOMAIN\$env:USERNAME" -LogonType Interactive -RunLevel Highest
Register-ScheduledTask -TaskName $TaskName -Action $action -Trigger $trigger -Settings $settings -Principal $principal -Description "SFERA bridge between local 1C/EDT/network folders and SFERA server." -Force | Out-Null
Start-ScheduledTask -TaskName $TaskName

Write-Host "Installed and started scheduled task $TaskName."
Write-Host "ServerUrl=$ServerUrl"
Write-Host "AgentId=$AgentId"
Write-Host "Config=$configPath"
if ($NetworkRoot.Count -gt 0) {
  Write-Host "NetworkRoot=$($NetworkRoot -join ', ')"
}