/** IRC session buffers and members. */

var BARE_IRC_MAX_TRANSCRIPT = 2000

function bareIrcCreateState(opts) {
  opts = opts || {}
  var max =
    opts.maxTranscript > 0 ? opts.maxTranscript : BARE_IRC_MAX_TRANSCRIPT
  return {
    connection: 'idle',
    nick: opts.nick || '',
    requestedNick: opts.nick || '',
    account: '',
    away: false,
    network: opts.network || '',
    isupport: bareIrcIsupportDefaults(),
    capsOffered: {},
    capsEnabled: {},
    buffers: {},
    currentId: 'server',
    maxTranscript: max,
    registered: false,
    tls: opts.tls !== false,
    saslOk: false,
    channelList: [],
    listBusy: false,
    ignore: {}
  }
}

function bareIrcBufferId(kind, name, mapping) {
  if (kind === 'server') return 'server'
  return kind + ':' + bareIrcCasemap(name, mapping)
}

function bareIrcEnsureBuffer(state, kind, name) {
  var mapping = bareIrcCasemapping(state.isupport)
  var id = bareIrcBufferId(kind, name, mapping)
  if (!state.buffers[id]) {
    state.buffers[id] = {
      id: id,
      kind: kind,
      name: name || '*server',
      topic: '',
      members: {},
      lines: [],
      unread: 0,
      highlight: false
    }
  }
  return state.buffers[id]
}

function bareIrcPushLine(state, buf, rec) {
  if (!buf) return
  buf.lines.push(rec)
  while (buf.lines.length > state.maxTranscript) buf.lines.shift()
  if (buf.id !== state.currentId) {
    buf.unread++
    if (rec && rec.highlight) buf.highlight = true
  }
}

function bareIrcListBuffers(state) {
  var ids = Object.keys(state.buffers)
  ids.sort(function (a, b) {
    if (a === 'server') return -1
    if (b === 'server') return 1
    return a < b ? -1 : a > b ? 1 : 0
  })
  return ids.map(function (id) {
    return state.buffers[id]
  })
}

function bareIrcMemberPrefixes(state, nickRaw) {
  var pref = bareIrcPrefixMap(state.isupport)
  var nick = String(nickRaw || '')
  var modes = ''
  while (nick && pref.byPref[nick.charAt(0)]) {
    modes += pref.byPref[nick.charAt(0)]
    nick = nick.slice(1)
  }
  return { nick: nick, modes: modes }
}