'use strict'

const test = require('node:test')
const assert = require('node:assert/strict')
const fs = require('fs')
const os = require('os')
const path = require('path')
const {
  defaultDesktopPrefs,
  getDesktopPrefsPath,
  normalizeDesktopPrefs,
  readDesktopPrefs,
  writeDesktopPrefs,
  ensureDesktopDeviceId,
  clearDesktopPrefsCache,
  DEFAULT_GLOBAL_SHORTCUT,
  DEVICE_ID_PATTERN,
} = require('./desktopPrefs.cjs')

/** 共享设备文件路径：与 mao-agent 的 ~/.mao/agent-cli/device.json 同一个文件。 */
function sharedDevicePath() {
  return path.join(process.env.MAO_TEST_HOME, '.mao', 'agent-cli', 'device.json')
}

/**
 * 隔离共享设备文件的 home：desktopPrefs 用 MAO_TEST_HOME 解析共享路径，
 * 用例之间互不影响，也不污染真实 ~/.mao。
 */
function withIsolatedHome(t, body) {
  const home = fs.realpathSync(fs.mkdtempSync(path.join(os.tmpdir(), 'mao-shared-device-')))
  const previous = process.env.MAO_TEST_HOME
  process.env.MAO_TEST_HOME = home
  clearDesktopPrefsCache()
  t.after(() => {
    if (previous == null) delete process.env.MAO_TEST_HOME
    else process.env.MAO_TEST_HOME = previous
    fs.rmSync(home, { recursive: true, force: true })
    clearDesktopPrefsCache()
  })
  return body(home)
}

function tempUserData(t) {
  const dir = fs.realpathSync(fs.mkdtempSync(path.join(os.tmpdir(), 'mao-desktop-prefs-')))
  t.after(() => fs.rmSync(dir, { recursive: true, force: true }))
  clearDesktopPrefsCache()
  return dir
}

test('默认值：关窗托盘化、快捷键 Alt+Shift+M、自启关', () => {
  const prefs = defaultDesktopPrefs()
  assert.equal(prefs.closeToTray, 'tray')
  assert.equal(prefs.trayHintShown, false)
  assert.equal(prefs.globalShortcut, DEFAULT_GLOBAL_SHORTCUT)
  assert.equal(prefs.globalShortcut, 'Alt+Shift+M')
  assert.equal(prefs.autoStart, false)
})

test('文件缺失时读盘返回默认值', (t) => {
  const dir = tempUserData(t)
  const prefs = readDesktopPrefs(dir)
  assert.equal(prefs.closeToTray, 'tray')
  assert.equal(prefs.globalShortcut, 'Alt+Shift+M')
})

test('坏文件（非法 JSON）回退默认值，不抛错', (t) => {
  const dir = tempUserData(t)
  fs.writeFileSync(getDesktopPrefsPath(dir), '{not json')
  const prefs = readDesktopPrefs(dir)
  assert.equal(prefs.closeToTray, 'tray')
  assert.equal(prefs.globalShortcut, 'Alt+Shift+M')
})

test('坏文件（JSON 但类型错误）逐字段回落', (t) => {
  const dir = tempUserData(t)
  fs.writeFileSync(
    getDesktopPrefsPath(dir),
    JSON.stringify({ closeToTray: 'nope', globalShortcut: 42, autoStart: 'yes', trayHintShown: 1 })
  )
  const prefs = readDesktopPrefs(dir)
  assert.equal(prefs.closeToTray, 'tray')
  assert.equal(prefs.globalShortcut, 'Alt+Shift+M')
  assert.equal(prefs.autoStart, false)
  assert.equal(prefs.trayHintShown, false)
})

test('合法文件逐字段读入', (t) => {
  const dir = tempUserData(t)
  fs.writeFileSync(
    getDesktopPrefsPath(dir),
    JSON.stringify({ closeToTray: 'quit', trayHintShown: true, globalShortcut: null, autoStart: true })
  )
  const prefs = readDesktopPrefs(dir)
  assert.equal(prefs.closeToTray, 'quit')
  assert.equal(prefs.trayHintShown, true)
  assert.equal(prefs.globalShortcut, null)
  assert.equal(prefs.autoStart, true)
})

test('写入后立即读到合并结果（缓存刷新）', (t) => {
  const dir = tempUserData(t)
  const first = writeDesktopPrefs(dir, { closeToTray: 'quit' })
  assert.equal(first.ok, true)
  assert.equal(first.prefs.closeToTray, 'quit')
  // 未指定字段保持默认
  assert.equal(first.prefs.globalShortcut, 'Alt+Shift+M')
  const reread = readDesktopPrefs(dir)
  assert.equal(reread.closeToTray, 'quit')

  const second = writeDesktopPrefs(dir, { globalShortcut: null })
  assert.equal(second.prefs.closeToTray, 'quit', '未指定字段保留上次值')
  assert.equal(second.prefs.globalShortcut, null)
  const third = writeDesktopPrefs(dir, { globalShortcut: 'Ctrl+Alt+K' })
  assert.equal(third.prefs.closeToTray, 'quit')
  assert.equal(third.prefs.globalShortcut, 'Ctrl+Alt+K')
})

test('写入为原子写：tmp+rename，无残留临时文件，内容完整可解析', (t) => {
  const dir = tempUserData(t)
  writeDesktopPrefs(dir, { closeToTray: 'quit' })
  const files = fs.readdirSync(dir)
  assert.deepEqual(files, ['desktop-prefs.json'], `不应残留 tmp 文件: ${files}`)
  const raw = fs.readFileSync(getDesktopPrefsPath(dir), 'utf8')
  const parsed = JSON.parse(raw)
  assert.equal(parsed.closeToTray, 'quit')
})

test('连续多次写入内容始终是最后一次的完整 JSON（无半写文件）', (t) => {
  const dir = tempUserData(t)
  for (let i = 0; i < 50; i++) {
    writeDesktopPrefs(dir, { trayHintShown: i % 2 === 0 })
  }
  const parsed = JSON.parse(fs.readFileSync(getDesktopPrefsPath(dir), 'utf8'))
  // 50 次后 i=49 → false
  assert.equal(parsed.trayHintShown, false)
  assert.equal(parsed.closeToTray, 'tray')
})

test('normalizeDesktopPrefs：版本演进只加字段，旧文件缺字段走 ?? default', () => {
  const normalized = normalizeDesktopPrefs({ closeToTray: 'quit' })
  assert.equal(normalized.closeToTray, 'quit')
  assert.equal(normalized.trayHintShown, false)
  assert.equal(normalized.globalShortcut, 'Alt+Shift+M')
  assert.equal(normalized.autoStart, false)
  assert.equal(normalized.version, 1)
})

test('normalizeDesktopPrefs：非对象入参回落默认', () => {
  assert.equal(normalizeDesktopPrefs(null).closeToTray, 'tray')
  assert.equal(normalizeDesktopPrefs('x').closeToTray, 'tray')
  assert.equal(normalizeDesktopPrefs(42).closeToTray, 'tray')
})

test('globalShortcut 空字符串回落默认键，null 表示关闭', () => {
  assert.equal(normalizeDesktopPrefs({ globalShortcut: '' }).globalShortcut, 'Alt+Shift+M')
  assert.equal(normalizeDesktopPrefs({ globalShortcut: '   ' }).globalShortcut, 'Alt+Shift+M')
  assert.equal(normalizeDesktopPrefs({ globalShortcut: null }).globalShortcut, null)
  assert.equal(normalizeDesktopPrefs({ globalShortcut: ' Ctrl+Shift+A ' }).globalShortcut, 'Ctrl+Shift+A')
})

test('写盘后缓存生效：同 dir 二次读盘不重复解析文件（clearDesktopPrefsCache 后可重读）', (t) => {
  const dir = tempUserData(t)
  writeDesktopPrefs(dir, { closeToTray: 'quit' })
  // 绕过写接口直接改文件，缓存未清时应仍返回缓存值
  fs.writeFileSync(getDesktopPrefsPath(dir), JSON.stringify({ closeToTray: 'tray' }))
  assert.equal(readDesktopPrefs(dir).closeToTray, 'quit')
  clearDesktopPrefsCache()
  assert.equal(readDesktopPrefs(dir).closeToTray, 'tray')
  // force 读盘
  clearDesktopPrefsCache()
  writeDesktopPrefs(dir, { closeToTray: 'quit' })
  fs.writeFileSync(getDesktopPrefsPath(dir), JSON.stringify({ closeToTray: 'tray' }))
  assert.equal(readDesktopPrefs(dir, { force: true }).closeToTray, 'tray')
})

test('设备 ID：ensure 时本机生成并落盘，后续读取稳定不变', (t) => {
  const dir = tempUserData(t)
  // 读路径不落盘：仅查看偏好不应凭空创建文件
  const readOnly = readDesktopPrefs(dir)
  assert.match(readOnly.deviceId, DEVICE_ID_PATTERN)
  assert.equal(fs.existsSync(getDesktopPrefsPath(dir)), false)

  const id = ensureDesktopDeviceId(dir)
  assert.match(id, DEVICE_ID_PATTERN)
  const persisted = JSON.parse(fs.readFileSync(getDesktopPrefsPath(dir), 'utf8'))
  assert.equal(persisted.deviceId, id)
  clearDesktopPrefsCache()
  assert.equal(readDesktopPrefs(dir).deviceId, id, '设备 ID 必须跨读取稳定')
  assert.equal(ensureDesktopDeviceId(dir), id, '重复 ensure 不改写设备 ID')
})

test('设备 ID：patch 不可改写（desktopPrefsSet 无法改绑设备）', (t) => {
  const dir = tempUserData(t)
  const first = readDesktopPrefs(dir)
  const written = writeDesktopPrefs(dir, { deviceId: 'attacker-dev', closeToTray: 'quit' })
  assert.equal(written.prefs.deviceId, first.deviceId)
  assert.equal(written.prefs.closeToTray, 'quit')
  const persisted = JSON.parse(fs.readFileSync(getDesktopPrefsPath(dir), 'utf8'))
  assert.equal(persisted.deviceId, first.deviceId)
})

test('设备 ID：旧文件缺字段 / 脏值 → 重新生成本机 ID，其余字段照常读入', (t) => {
  const dir = tempUserData(t)
  fs.writeFileSync(getDesktopPrefsPath(dir), JSON.stringify({ deviceId: 'bad id!', closeToTray: 'quit' }))
  const prefs = readDesktopPrefs(dir)
  assert.match(prefs.deviceId, DEVICE_ID_PATTERN)
  assert.notEqual(prefs.deviceId, 'bad id!')
  assert.equal(prefs.closeToTray, 'quit')
  // ensure 后脏值被替换为新 ID 落盘
  const id = ensureDesktopDeviceId(dir)
  assert.match(id, DEVICE_ID_PATTERN)
  const persisted = JSON.parse(fs.readFileSync(getDesktopPrefsPath(dir), 'utf8'))
  assert.equal(persisted.deviceId, id)
  assert.equal(persisted.closeToTray, 'quit')
})

test('设备 ID：与 mao-agent 共用 ~/.mao/agent-cli/device.json，两端同机同 ID', (t) => {
  withIsolatedHome(t, (home) => {
    const dir = tempUserData(t)
    // CLI 先装过：共享文件里已有 ID，桌面端必须复用它（不再自生成第二个）
    const cliId = '11111111-2222-4333-8444-555555555555'
    fs.mkdirSync(path.dirname(sharedDevicePath()), { recursive: true })
    fs.writeFileSync(sharedDevicePath(), JSON.stringify({ id: cliId }, null, 2) + '\n')

    const id = ensureDesktopDeviceId(dir)
    assert.equal(id, cliId, '桌面端必须复用 CLI 已登记的设备 ID')
    // 桌面偏好同步改绑，避免下次又从旧值出发
    clearDesktopPrefsCache()
    assert.equal(readDesktopPrefs(dir).deviceId, cliId)
  })
})

test('设备 ID：CLI 未装时桌面端创建共享文件，之后 CLI 直接读到同一个 ID', (t) => {
  withIsolatedHome(t, () => {
    const dir = tempUserData(t)
    assert.equal(fs.existsSync(sharedDevicePath()), false)

    const id = ensureDesktopDeviceId(dir)
    assert.match(id, DEVICE_ID_PATTERN)
    assert.equal(fs.existsSync(sharedDevicePath()), true, '桌面端应把设备 ID 写进共享文件')
    assert.equal(JSON.parse(fs.readFileSync(sharedDevicePath(), 'utf8')).id, id)

    // CLI 侧 resolveDeviceIdentity 读同一文件 → 同机两端同一个 deviceId
    clearDesktopPrefsCache()
    assert.equal(ensureDesktopDeviceId(dir), id, '重复 ensure 保持稳定')
  })
})

test('设备 ID：共享文件损坏时回落桌面自己的 ID，不抛错', (t) => {
  withIsolatedHome(t, () => {
    const dir = tempUserData(t)
    fs.mkdirSync(path.dirname(sharedDevicePath()), { recursive: true })
    fs.writeFileSync(sharedDevicePath(), '{not json')

    const id = ensureDesktopDeviceId(dir)
    assert.match(id, DEVICE_ID_PATTERN)
    assert.equal(readDesktopPrefs(dir).deviceId, id)
  })
})