'use strict'

const el = {
  version: document.getElementById('app-version'),
  stateDot: document.getElementById('state-dot'),
  stateLabel: document.getElementById('state-label'),
  stateDetail: document.getElementById('state-detail'),
  url: document.getElementById('k-url'),
  pid: document.getElementById('k-pid'),
  restarts: document.getElementById('k-restarts'),
  power: document.getElementById('k-power'),
  exe: document.getElementById('k-exe'),
  config: document.getElementById('k-config'),
  configWarning: document.getElementById('config-warning'),
  displayList: document.getElementById('display-list'),
  instanceList: document.getElementById('instance-list'),
  instancesSummary: document.getElementById('instances-summary'),
  log: document.getElementById('log'),
  autoscroll: document.getElementById('autoscroll'),
  btnStart: document.getElementById('btn-start'),
  btnStop: document.getElementById('btn-stop'),
  btnRestart: document.getElementById('btn-restart'),
  btnRelayout: document.getElementById('btn-relayout'),
  btnOpenAdmin: document.getElementById('btn-open-admin'),
  btnClearLog: document.getElementById('btn-clear-log'),
  btnResetAccount: document.getElementById('btn-reset-account'),
  acctUser: document.getElementById('acct-user'),
  acctNewUser: document.getElementById('acct-new-user'),
  acctPassword: document.getElementById('acct-password'),
  acctStatus: document.getElementById('acct-status'),
  acctOutput: document.getElementById('acct-output'),
  titlebar: document.getElementById('titlebar'),
  winMin: document.getElementById('win-min'),
  winMax: document.getElementById('win-max'),
  winClose: document.getElementById('win-close')
}

const DOT_CLASS = {
  running: 'ok',
  starting: 'warn',
  stopping: 'warn',
  crashed: 'err',
  stopped: ''
}

function renderStatus(status) {
  el.version.textContent = status.appVersion ? `v${status.appVersion}` : ''

  el.stateDot.className = `dot ${status.healthy ? 'ok' : DOT_CLASS[status.state] || ''}`
  el.stateLabel.textContent = status.stateLabel || status.state
  el.stateDetail.textContent = status.healthy
    ? '健康检查通过'
    : status.lastError || (status.state === 'stopped' ? '服务未运行' : '等待健康检查')

  el.url.textContent = status.url || '—'
  el.pid.textContent = status.pid || '—'
  el.restarts.textContent = status.restarts ? `${status.restarts} 次` : '0 次'
  el.power.textContent = status.powerSaveBlocked ? '已启用（阻止显示器休眠）' : '未启用'
  el.exe.textContent = status.exePath || '—'
  el.config.textContent = status.configPath || '—'

  if (status.configWarning) {
    el.configWarning.hidden = false
    el.configWarning.textContent = status.configWarning
  } else {
    el.configWarning.hidden = true
  }

  const busy = ['starting', 'running', 'stopping'].includes(status.state)
  el.btnStart.disabled = busy
  el.btnStop.disabled = !busy
  el.btnRestart.disabled = !busy

  renderDisplays(status.displays || [])
}

function renderDisplays(displays) {
  el.displayList.textContent = ''
  if (!displays.length) {
    const li = document.createElement('li')
    li.className = 'muted'
    li.textContent = '尚未打开大屏窗口'
    el.displayList.append(li)
    return
  }
  for (const item of displays) {
    const li = document.createElement('li')
    const page = document.createElement('span')
    page.className = 'page'
    page.textContent = `屏 ${item.displayId} · ${item.page}`
    const url = document.createElement('span')
    url.className = 'url'
    url.textContent = item.url || '（加载中）'
    li.append(page, url)
    el.displayList.append(li)
  }
}

function renderInstances(payload) {
  el.instanceList.textContent = ''

  if (!payload || !payload.ok) {
    el.instancesSummary.textContent = ''
    const li = document.createElement('li')
    li.className = 'muted'
    li.textContent = (payload && payload.message) || '暂时无法读取大屏实例'
    el.instanceList.append(li)
    return
  }

  const list = payload.instances || []
  el.instancesSummary.textContent = `共 ${list.length} 个 · ${list.filter((item) => item.online).length} 在线`

  if (!list.length) {
    const li = document.createElement('li')
    li.className = 'muted'
    li.textContent = '当前没有大屏实例连接'
    el.instanceList.append(li)
    return
  }

  for (const item of list) {
    const li = document.createElement('li')
    const page = document.createElement('span')
    page.className = 'page'
    page.textContent = item.page || '未知页面'
    const id = document.createElement('span')
    id.className = 'url'
    id.textContent = item.id || '—'
    const state = document.createElement('span')
    state.className = `state ${item.online ? 'online' : 'offline'}`
    state.textContent = item.online ? '在线' : '离线'
    li.append(page, id, state)
    el.instanceList.append(li)
  }
}

function appendLog(line) {
  const atBottom = el.log.scrollTop + el.log.clientHeight >= el.log.scrollHeight - 8
  el.log.textContent += `${line}\n`
  if (el.autoscroll.checked && atBottom) {
    el.log.scrollTop = el.log.scrollHeight
  }
}

function setLog(lines) {
  el.log.textContent = lines.length ? `${lines.join('\n')}\n` : ''
  el.log.scrollTop = el.log.scrollHeight
}

async function refresh() {
  renderStatus(await window.consoleApi.getStatus())
}

function renderMaximized(maximized) {
  el.winMax.classList.toggle('is-maximized', maximized)
  const label = maximized ? '还原' : '最大化'
  el.winMax.title = label
  el.winMax.setAttribute('aria-label', label)
}

function bindWindowControls() {
  el.winMin.addEventListener('click', () => window.consoleApi.minimize())
  el.winMax.addEventListener('click', () => window.consoleApi.maximize())
  el.winClose.addEventListener('click', () => window.consoleApi.close())

  // 双击标题栏切换最大化；点在按钮上的双击不算，否则连点会误触
  el.titlebar.addEventListener('dblclick', (event) => {
    if (event.target instanceof Element && event.target.closest('.win-btn')) return
    window.consoleApi.maximize()
  })

  window.consoleApi.onMaximizeChange(renderMaximized)
  window.consoleApi.isMaximized().then(renderMaximized)
}

function bindActions() {
  el.btnStart.addEventListener('click', async () => renderStatus(await window.consoleApi.startService()))
  el.btnStop.addEventListener('click', async () => renderStatus(await window.consoleApi.stopService()))
  el.btnRestart.addEventListener('click', async () => renderStatus(await window.consoleApi.restartService()))
  el.btnRelayout.addEventListener('click', async () => renderStatus(await window.consoleApi.relayoutDisplays()))
  el.btnClearLog.addEventListener('click', async () => {
    await window.consoleApi.clearLog()
    setLog([])
  })
  el.btnOpenAdmin.addEventListener('click', () => window.consoleApi.openServerAdmin())
  el.btnResetAccount.addEventListener('click', resetAccount)
}

let accountStreaming = false

function setAccountOutput(text) {
  el.acctOutput.hidden = !text
  el.acctOutput.textContent = text || ''
  if (text) el.acctOutput.scrollTop = el.acctOutput.scrollHeight
}

function appendAccountOutput(text) {
  el.acctOutput.hidden = false
  el.acctOutput.textContent += text
  el.acctOutput.scrollTop = el.acctOutput.scrollHeight
}

function handleAccountOutput(text) {
  // 只在提交中接收流式输出：重置结束后的最终结果由返回值统一渲染，避免重复
  if (accountStreaming) appendAccountOutput(text)
}

function setAccountStatus(text, kind) {
  el.acctStatus.hidden = !text
  el.acctStatus.textContent = text || ''
  el.acctStatus.className = kind ? `hint ${kind}` : 'hint'
}

function setAccountBusy(busy) {
  el.btnResetAccount.disabled = busy
  el.btnResetAccount.textContent = busy ? '正在重置…' : '重置账号'
  for (const input of [el.acctUser, el.acctNewUser, el.acctPassword]) input.disabled = busy
}

async function resetAccount() {
  const currentUsername = el.acctUser.value.trim()
  const newUsername = el.acctNewUser.value.trim()
  const password = el.acctPassword.value

  if (!currentUsername) {
    setAccountStatus('请先填写当前用户名', 'err')
    return
  }

  const target = newUsername ? `用户名改为「${newUsername}」` : '只重置密码'
  // 重置会踢掉该用户的所有登录态，属于不可撤销操作，必须先二次确认
  const confirmed = window.confirm(
    '确认重置管理员账号？\n\n' +
      `当前用户名：${currentUsername}\n` +
      `本次操作：${target}\n` +
      `新密码：${password ? '使用输入框中的密码' : '由程序随机生成'}\n\n` +
      '重置会作废该用户的全部登录会话，正在使用管理面板的人会被强制退出。'
  )
  if (!confirmed) return

  accountStreaming = true
  setAccountBusy(true)
  setAccountOutput('')
  setAccountStatus('正在调用 scoreboard.exe passwd …')

  try {
    const result = await window.consoleApi.resetAdminAccount({ currentUsername, newUsername, password })
    accountStreaming = false
    setAccountOutput(result.output || result.error || '')

    if (result.ok) {
      setAccountStatus(
        password ? '重置成功，原会话已全部作废。' : '重置成功，密码为随机生成，请从下方输出抄录后立即修改。',
        'ok'
      )
      el.acctUser.value = newUsername || currentUsername
      el.acctNewUser.value = ''
      el.acctPassword.value = ''
    } else {
      setAccountStatus(`重置失败：${result.error || `passwd 退出码 ${result.exitCode}`}`, 'err')
    }
  } catch (err) {
    setAccountStatus(`重置失败：${err.message}`, 'err')
  } finally {
    accountStreaming = false
    setAccountBusy(false)
  }
}

async function boot() {
  bindActions()
  bindWindowControls()
  window.consoleApi.onStatus(renderStatus)
  window.consoleApi.onLog(appendLog)
  window.consoleApi.onAccountOutput(handleAccountOutput)
  window.consoleApi.onDisplayInstances(renderInstances)
  setLog(await window.consoleApi.getLog())
  await refresh()
  // 主进程只在窗口可见时轮询；这里补一次，保证窗口刚打开就有数据
  renderInstances(await window.consoleApi.getDisplayInstances())
}

boot()