/*
 * @Author: 李皓 hao_li_work@163.com
 * @Date: 2026-07-28 15:22:20
 * @LastEditors: 李皓 hao_li_work@163.com
 * @LastEditTime: 2026-07-28 16:59:56
 * @FilePath: \pc\main.js
 * @Description:
 * @Version: 1.0.0
 */
const { app, BrowserWindow, ipcMain } = require('electron')
const path = require('path')
const fs = require('fs')
const { SerialPort } = require('serialport')
const { WitMotionSensor } = require('./sensor')
const { UsbSerialBridge } = require('./usb-serial-bridge')
const pkg = require('./package.json')

const cacheDir = app.getPath('userData')
const cacheFile = path.join(cacheDir, 'app-cache.json')
const fileRoot = path.join(cacheDir, 'files')

let mainWindow = null
let sensor = null
let usbBridge = null
let sensorOpen = false
let sensorDevices = []
let lastSensorValues = {}

function ensureDir(dir) {
  try {
    if (!fs.existsSync(dir)) fs.mkdirSync(dir, { recursive: true })
  } catch {}
}

function readCache() {
  try {
    if (fs.existsSync(cacheFile)) return JSON.parse(fs.readFileSync(cacheFile, 'utf-8'))
  } catch {}
  return {}
}

function writeCache(data) {
  try {
    ensureDir(cacheDir)
    fs.writeFileSync(cacheFile, JSON.stringify(data, null, 2), 'utf-8')
  } catch {}
}

function resolveAppFile(inputPath) {
  const raw = String(inputPath || '').trim()
  if (!raw) return fileRoot
  if (path.isAbsolute(raw) && /^[a-zA-Z]:[\\/]/.test(raw)) return raw
  const relative = raw.replace(/^[/\\]+/, '')
  return path.join(fileRoot, relative)
}

function fileList(dir) {
  try {
    const target = resolveAppFile(dir)
    if (!fs.existsSync(target)) return ''
    const stat = fs.statSync(target)
    if (stat.isFile()) return target
    return fs.readdirSync(target).map(name => path.join(target, name)).join('\n')
  } catch {
    return ''
  }
}

function sensorOperations(id) {
  return [
    { id: 'read-version', name: '获取当前传感器版本' },
    { id: 'read-temp', name: '获取设备温度' },
    { id: 'read-euler', name: '获取设备角度' },
    { id: 'reset-euler', name: '重置角度传感器基准' },
    { id: 'read-heading-and-vertical', name: '获取朝向和垂直夹角' }
  ].map(op => ({ ...op, sensorId: id }))
}

async function refreshSensorDevices() {
  try {
    const ports = await SerialPort.list()
    sensorDevices = ports
      .filter(p => p.path && /^COM\d+$/i.test(p.path))
      .map(p => ({
        id: `HWT6053:${p.path}`,
        name: 'HWT6053',
        port: p.path,
        baudRate: 9600,
        isOpen: sensorOpen,
        operations: sensorOperations(`HWT6053:${p.path}`)
      }))

    for (const device of sensorDevices) {
      if (mainWindow && !mainWindow.isDestroyed()) {
        mainWindow.webContents.send('sensor-attached', { id: device.id, name: device.name })
      }
    }
  } catch (err) {
    console.error('[sensor] 刷新设备失败:', err.message)
    sensorDevices = []
  }
}

function normalizeSensorData(data) {
  if (!data || data.sensor !== 'HWT6053') return data
  if (data.method === 'temperature') {
    const value = data.value && typeof data.value === 'object' ? data.value.temp : data.value
    return { sensor: 'HWT6053', method: 'read-temp', value: String(value ?? '') }
  }
  if (data.method === 'angle') {
    return { sensor: 'HWT6053', method: 'read-euler', value: data.value }
  }
  if (data.method === 'magnetic') {
    return { sensor: 'HWT6053', method: 'read-heading-and-vertical', value: data.value }
  }
  return data
}

function cacheSensorValue(data) {
  const normalized = normalizeSensorData(data)
  if (!normalized) return
  lastSensorValues[normalized.method] = normalized.value
  if (mainWindow && !mainWindow.isDestroyed()) {
    mainWindow.webContents.send('sensor-data', normalized)
  }
}

function ensureSensor() {
  if (sensor) return sensor
  sensor = new WitMotionSensor({
    onData: cacheSensorValue,
    onLog: (level, msg) => {
      console.log(`[sensor] ${msg}`)
      if (mainWindow && !mainWindow.isDestroyed()) {
        try { mainWindow.webContents.send('sensor-log', { level, msg }) } catch {}
      }
    }
  })
  return sensor
}

function openAppSensor() {
  sensorOpen = true
  refreshSensorDevices()
  ensureSensor().connect()
  return true
}

function closeAppSensor() {
  sensorOpen = false
  if (sensor) sensor.disconnect()
  sensor = null
  return true
}

function runSensorOperation(opId) {
  if (opId === 'read-version') return pkg.version || '1'
  if (opId === 'read-temp') return lastSensorValues['read-temp'] ?? null
  if (opId === 'read-euler') {
    const value = lastSensorValues['read-euler']
    return value == null ? null : JSON.stringify(value)
  }
  if (opId === 'read-heading-and-vertical') {
    const value = lastSensorValues['read-heading-and-vertical']
    return value == null ? null : JSON.stringify(value)
  }
  if (opId === 'reset-euler') return '0'
  return null
}

function createWindow() {
  mainWindow = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      preload: path.join(__dirname, 'preload.js'),
      contextIsolation: true,
      nodeIntegration: false,
      sandbox: false
    }
  })

  mainWindow.loadFile('./dist/index.html')
  usbBridge = new UsbSerialBridge(mainWindow)
  refreshSensorDevices()
}

function registerIpc() {
  ipcMain.on('app-clear-cache-sync', (event) => {
    writeCache({})
    if (mainWindow && !mainWindow.isDestroyed()) mainWindow.reload()
    event.returnValue = true
  })

  ipcMain.on('app-version-code-sync', (event) => {
    const major = Number(String(pkg.version || '1').split('.')[0]) || 1
    event.returnValue = major
  })

  ipcMain.on('get-cache-sync', (event, key) => {
    const cache = readCache()
    event.returnValue = key ? (cache[key] ?? null) : JSON.stringify(cache)
  })

  ipcMain.on('set-cache-sync', (event, key, value) => {
    const cache = readCache()
    cache[key] = value
    writeCache(cache)
    event.returnValue = true
  })

  ipcMain.handle('get-cache', (_event, key) => {
    const cache = readCache()
    return key ? (cache[key] ?? null) : cache
  })

  ipcMain.handle('set-cache', (_event, key, value) => {
    const cache = readCache()
    cache[key] = value
    writeCache(cache)
    return true
  })

  ipcMain.on('app-offline-page', () => {
    if (mainWindow && !mainWindow.isDestroyed()) mainWindow.webContents.send('app-page-mode', 'offline')
  })

  ipcMain.on('app-online-page', () => {
    if (mainWindow && !mainWindow.isDestroyed()) mainWindow.webContents.send('app-page-mode', 'online')
  })

  ipcMain.on('app-file-list-sync', (event, dir) => {
    event.returnValue = fileList(dir)
  })

  ipcMain.on('app-file-write-string', (event, filePath, content, token) => {
    const target = resolveAppFile(filePath)
    fs.promises.mkdir(path.dirname(target), { recursive: true })
      .then(() => fs.promises.writeFile(target, String(content ?? ''), 'utf-8'))
      .then(() => event.sender.send('app-file-write-callback', token, target, true, ''))
      .catch(err => event.sender.send('app-file-write-callback', token, target, false, err.message))
  })

  ipcMain.on('app-file-read-string', (event, filePath, token) => {
    const target = resolveAppFile(filePath)
    fs.promises.readFile(target, 'utf-8')
      .then(content => event.sender.send('app-file-read-callback', token, target, content))
      .catch(() => event.sender.send('app-file-read-callback', token, target, null))
  })

  ipcMain.on('app-file-delete', (event, filePath, token) => {
    const target = resolveAppFile(filePath)
    fs.promises.unlink(target)
      .then(() => event.sender.send('app-file-delete-callback', token, target, true))
      .catch(() => event.sender.send('app-file-delete-callback', token, target, false))
  })

  ipcMain.on('app-sensor-open-sync', (event) => { event.returnValue = openAppSensor() })
  ipcMain.on('app-sensor-close-sync', (event) => { event.returnValue = closeAppSensor() })
  ipcMain.on('app-sensor-is-open-sync', (event) => { event.returnValue = sensorOpen })

  ipcMain.on('sensor-init-all-sync', (event) => {
    refreshSensorDevices()
    event.returnValue = true
  })
  ipcMain.on('sensor-flush-sync', (event) => {
    refreshSensorDevices()
    event.returnValue = true
  })
  ipcMain.on('sensor-list-sync', (event) => {
    event.returnValue = sensorDevices
  })
  ipcMain.on('sensor-init-sync', (event, id) => {
    event.returnValue = sensorDevices.some(device => device.id === id)
  })
  ipcMain.on('sensor-open-sync', (event) => { event.returnValue = openAppSensor() })
  ipcMain.on('sensor-close-sync', (event) => { event.returnValue = closeAppSensor() })
  ipcMain.on('sensor-operation-sync', (event, _id, opId) => {
    event.returnValue = runSensorOperation(opId)
  })
  ipcMain.on('sensor-operation-async', (event, id, opId) => {
    const result = runSensorOperation(opId)
    event.sender.send('sensor-operation-callback', id, opId, result)
  })

  ipcMain.on('app-location-is-support-sync', (event) => { event.returnValue = false })
  ipcMain.on('app-location-is-open-sync', (event) => { event.returnValue = false })
  ipcMain.on('app-location-open', (event) => { event.sender.send('app-location-opened', 1) })
  ipcMain.on('app-location-close', () => {})
}

app.whenReady().then(() => {
  registerIpc()
  ensureDir(fileRoot)
  createWindow()

  app.on('before-quit', () => {
    if (sensor) sensor.disconnect()
    if (usbBridge) usbBridge.disconnectAll()
  })
})