const { app, BrowserWindow, ipcMain } = require('electron')
const path = require('path')
const fs = require('fs')

const AGREEMENT_FILE = 'user-agreement-accepted.json'

function agreementPath() {
  return path.join(app.getPath('userData'), AGREEMENT_FILE)
}

function hasAcceptedAgreement() {
  try {
    return fs.existsSync(agreementPath())
  } catch {
    return false
  }
}

function markAgreementAccepted() {
  fs.writeFileSync(
    agreementPath(),
    JSON.stringify({ v: 1, acceptedAt: Date.now() }, null, 2),
    'utf8'
  )
}

/** 占位主窗口；合并到实际桌面端时请替换为真实 loadURL / loadFile */
function createMainWindow() {
  const win = new BrowserWindow({
    width: 960,
    height: 640,
    webPreferences: {
      contextIsolation: true,
      nodeIntegration: false,
    },
  })
  win.loadURL('about:blank')
  return win
}

function showAgreementGate(onAccepted) {
  const win = new BrowserWindow({
    width: 520,
    height: 680,
    show: false,
    resizable: true,
    minimizable: false,
    maximizable: false,
    fullscreenable: false,
    webPreferences: {
      preload: path.join(__dirname, 'preload.js'),
      contextIsolation: true,
      nodeIntegration: false,
    },
  })

  win.loadFile(path.join(__dirname, 'agreement.html'))
  win.once('ready-to-show', () => win.show())

  ipcMain.once('agreement-accept', () => {
    markAgreementAccepted()
    ipcMain.removeAllListeners('agreement-refuse')
    win.close()
    onAccepted()
  })

  ipcMain.once('agreement-refuse', () => {
    ipcMain.removeAllListeners('agreement-accept')
    app.quit()
  })

  win.on('closed', () => {
    if (!hasAcceptedAgreement()) {
      app.quit()
    }
  })
}

app.whenReady().then(() => {
  if (!hasAcceptedAgreement()) {
    showAgreementGate(() => createMainWindow())
  } else {
    createMainWindow()
  }
})

app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') {
    app.quit()
  }
})