import { app, BrowserWindow, ipcMain } from 'electron'
import net from 'node:net'
import path from 'node:path'

/**
 * Phase-0 spike main process. Print transport is network ESC/POS (port 9100)
 * — the zero-driver path every thermal printer brand supports. USB-shared
 * printers come later via the raw-spool decision (see BUILDING.md).
 */
function createWindow(): void {
  const win = new BrowserWindow({
    width: 1366,
    height: 820,
    backgroundColor: '#0f1216',
    autoHideMenuBar: true,
    webPreferences: {
      preload: path.join(__dirname, 'preload.cjs'),
      contextIsolation: true,
      nodeIntegration: false,
    },
  })
  void win.loadFile(path.join(__dirname, '../dist/index.html'))
}

ipcMain.handle('printers:list', async (event) => {
  const printers = await event.sender.getPrintersAsync()
  return printers.map((p) => ({ name: p.name, displayName: p.displayName }))
})

ipcMain.handle('print:raw9100', (_event, host: string, port: number, bytes: Uint8Array) => {
  return new Promise<string>((resolve, reject) => {
    const socket = net.createConnection({ host, port, timeout: 3000 })
    socket.on('connect', () => {
      socket.end(Buffer.from(bytes))
    })
    socket.on('close', () => resolve('sent'))
    socket.on('timeout', () => {
      socket.destroy()
      reject(new Error(`Printer ${host}:${port} timed out`))
    })
    socket.on('error', (err) => reject(err))
  })
})

app.whenReady().then(createWindow)
app.on('window-all-closed', () => app.quit())