param([switch]$SkipMigration)
. (Join-Path $PSScriptRoot 'bell-common.ps1')

$backend = $null
$pidFile = $null
try {
    $root = Get-BellPackageRoot
    $state = Initialize-BellRuntime -PackageRoot $root
    $bell = Join-Path $root 'bell.exe'
    if (-not (Test-Path -LiteralPath $bell -PathType Leaf)) { throw "Bell executable not found: $bell" }
    $runtime = Join-Path $root 'runtime'
    $logs = Join-Path $runtime 'logs'
    New-Item -ItemType Directory -Force -Path $logs,(Join-Path $root 'temp\logs') | Out-Null
    $pidFile = Join-Path $runtime 'bell.pid'
    if (Test-Path -LiteralPath $pidFile) {
        $oldPid = 0
        if ([int]::TryParse((Get-Content -LiteralPath $pidFile -Raw).Trim(), [ref]$oldPid) -and (Get-Process -Id $oldPid -ErrorAction SilentlyContinue)) { throw "Bell appears to be running with process id $oldPid." }
        Remove-Item -LiteralPath $pidFile -Force
    }
    [IO.File]::WriteAllText($pidFile, "$PID", (New-Object Text.UTF8Encoding($false)))
    Push-Location $root
    try {
        $autoMigrate = (Get-BellEnvironmentValue -Name 'BELL_AUTO_MIGRATE' -Default 'true').ToLowerInvariant()
        if (-not $SkipMigration -and $autoMigrate -notin @('false','0','no')) {
            Write-Host 'Applying pending Bell database migrations...'
            & $bell migrate -c $state.SettingsPath
            if ($LASTEXITCODE -ne 0) { throw 'Bell database migration failed.' }
        }
        $backend = Start-Process -FilePath $bell -ArgumentList @('server','-c',$state.SettingsPath) -WorkingDirectory $root -RedirectStandardOutput (Join-Path $logs 'bell.out.log') -RedirectStandardError (Join-Path $logs 'bell.err.log') -WindowStyle Hidden -PassThru
        Wait-BellHealth -BaseUrl $state.BackendUrl
        Write-Host "Bell is available at $($state.WebUrl)/"
        Write-Host 'Press Ctrl+C in this window or run stop-bell.bat to stop Bell.'
        & (Join-Path $PSScriptRoot 'bell-web.ps1') -WebRoot $state.WebRoot -ListenHost $state.WebHost -ListenPort $state.WebPort -BackendUrl $state.BackendUrl
    } finally { Pop-Location }
} catch {
    Write-Error $_.Exception.Message
    exit 1
} finally {
    if ($backend -and -not $backend.HasExited) { & taskkill.exe /PID $backend.Id /T /F 2>$null | Out-Null }
    if ($pidFile -and (Test-Path -LiteralPath $pidFile)) { Remove-Item -LiteralPath $pidFile -Force }
}