// ── Port Precheck ──────────────────────────────────────────────────
// Kills any existing processes on ports 3001, 3006, 3007, 3008.
// These are the AI server, Next.js frontend, Signaling server, and
// Python scraper respectively.
// Runs before anything else starts to avoid EADDRINUSE errors.

import { execSync } from "node:child_process"
import { platform } from "node:os"

const PORTS = [3001, 3006, 3007, 3008]

if (platform() === "win32") {
  // Windows: use netstat + findstr to find listening PIDs, then taskkill
  for (const port of PORTS) {
    try {
      const out = execSync(`netstat -ano | findstr "LISTENING" | findstr ":${port} "`, { encoding: "utf8", timeout: 5000 })
      const lines = out.trim().split("\n").filter(Boolean)
      for (const line of lines) {
        const parts = line.trim().split(/\s+/)
        const pid = parts[parts.length - 1]
        if (pid) {
          try { execSync(`taskkill /F /PID ${pid}`, { stdio: "ignore", timeout: 3000 }); console.log(`Freed port ${port} (PID ${pid})`) } catch {}
        }
      }
    } catch {}
  }
} else {
  // Linux/Mac: use lsof -ti to find PIDs, then kill -9
  for (const port of PORTS) {
    try {
      const pid = execSync(`lsof -ti:${port} 2>/dev/null`, { encoding: "utf8", timeout: 5000 }).trim()
      if (pid) {
        execSync(`kill -9 ${pid}`, { stdio: "ignore", timeout: 3000 })
        console.log(`Freed port ${port} (PID ${pid})`)
      }
    } catch {}
  }
}