'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'),
  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'),
  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 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())
}

async function boot() {
  bindActions()
  bindWindowControls()
  window.consoleApi.onStatus(renderStatus)
  window.consoleApi.onLog(appendLog)
  setLog(await window.consoleApi.getLog())
  await refresh()
}

boot()