<#
.SYNOPSIS
    Stops the Likwid development environment.
.DESCRIPTION
    Gracefully stops backend, frontend, and PostgreSQL container.
#>
[CmdletBinding()]
param()

$ErrorActionPreference = 'Continue'

$root = Split-Path -Parent $PSScriptRoot
$stateDir = Join-Path $PSScriptRoot '.dev'
$stateFile = Join-Path $stateDir 'state.json'

function Stop-ProcessSafely([int]$ProcessId, [string]$Name) {
    if (-not $ProcessId) { return $false }
    
    $proc = Get-Process -Id $ProcessId -ErrorAction SilentlyContinue
    if (-not $proc) { return $false }
    
    Write-Host "Stopping $Name (PID $ProcessId)..."
    Stop-Process -Id $ProcessId -ErrorAction SilentlyContinue
    Start-Sleep -Milliseconds 500
    
    # Force kill if still running
    $proc = Get-Process -Id $ProcessId -ErrorAction SilentlyContinue
    if ($proc) {
        Stop-Process -Id $ProcessId -Force -ErrorAction SilentlyContinue
    }
    return $true
}

function Stop-ProcessOnPort([int]$Port) {
    $connections = netstat -ano 2>$null | Select-String ":$Port.*LISTENING"
    foreach ($conn in $connections) {
        $parts = ($conn.Line -replace '\s+', ' ').Trim().Split(' ')
        $procId = [int]$parts[-1]
        if ($procId -gt 0) {
            Stop-ProcessSafely -ProcessId $procId -Name "process on port $Port" | Out-Null
        }
    }
}

Write-Host "=== Stopping Likwid Dev Environment ==="

# Stop from saved state
if (Test-Path $stateFile) {
    $state = Get-Content -Raw $stateFile | ConvertFrom-Json -ErrorAction SilentlyContinue
    if ($state) {
        Stop-ProcessSafely -ProcessId $state.frontendPid -Name 'Frontend' | Out-Null
        Stop-ProcessSafely -ProcessId $state.backendPid -Name 'Backend' | Out-Null
    }
}

# Cleanup any orphaned processes on the ports
Stop-ProcessOnPort -Port 4321
Stop-ProcessOnPort -Port 3000

# Stop PostgreSQL container
Write-Host "Stopping PostgreSQL container..."
$composeFile = Join-Path $root 'compose/dev.yml'
podman-compose -f $composeFile down 2>$null

# Clean up state file
if (Test-Path $stateFile) {
    Remove-Item -Force $stateFile
}

Write-Host ""
Write-Host "All services stopped."