import test from 'brittle'
import { readFile } from 'node:fs/promises'
import { dirname, join } from 'node:path'
import { fileURLToPath } from 'node:url'

const __dirname = dirname(fileURLToPath(import.meta.url))

async function load() {
  const parts = await Promise.all([
    readFile(join(__dirname, '../lib/irc-parse.js'), 'utf8'),
    readFile(join(__dirname, '../lib/irc-isupport.js'), 'utf8'),
    readFile(join(__dirname, '../lib/irc-sasl.js'), 'utf8'),
    readFile(join(__dirname, '../lib/irc-state.js'), 'utf8'),
    readFile(join(__dirname, '../lib/irc-config.js'), 'utf8'),
    readFile(join(__dirname, '../lib/irc-client.js'), 'utf8'),
    readFile(join(__dirname, '../lib/irc-commands.js'), 'utf8')
  ])
  const hook = {}
  new Function(
    'exports',
    parts.join('\n') +
      `
exports.bareIrcCreateClient = bareIrcCreateClient;
exports.bareIrcRunSlash = bareIrcRunSlash;
exports.bareIrcRandomNick = bareIrcRandomNick;
exports.bareIrcNickLooksMachine = bareIrcNickLooksMachine;
exports.bareIrcResolveConnect = bareIrcResolveConnect;
`
  )(hook)
  return hook
}

function client() {
  const writes = []
  const c = {
    opts: { nick: 'alice' },
    state: null,
    sendRaw: function (cmd, params) {
      writes.push({ cmd: cmd, params: params || [] })
      return true
    },
    sendPrivmsg: function (t, text) {
      writes.push({ cmd: 'PRIVMSG', params: [t, text] })
      return true
    },
    join: function (ch, key) {
      writes.push({ cmd: 'JOIN', params: key ? [ch, key] : [ch] })
    },
    part: function (ch, reason) {
      writes.push({ cmd: 'PART', params: reason ? [ch, reason] : [ch] })
    },
    quit: function (reason) {
      writes.push({ cmd: 'QUIT', params: [reason || 'Leaving'] })
    },
    list: function (pat) {
      writes.push({ cmd: 'LIST', params: pat ? [pat] : [] })
    }
  }
  c._writes = writes
  return c
}

test('machine hostname is not used as nick', async (t) => {
  const h = await load()
  t.ok(h.bareIrcNickLooksMachine('ce6601f481ec'))
  t.ok(h.bareIrcNickLooksMachine('a1b2c3d4e5f6'))
  t.absent(h.bareIrcNickLooksMachine('raven'))
  const nick = h.bareIrcRandomNick()
  t.ok(/^os[a-z0-9]{5}$/.test(nick))
  const spec = h.bareIrcResolveConnect(
    { env: { USER: 'ce6601f481ec' } },
    { rest: [] },
    { config: {}, secrets: {} }
  )
  t.ok(spec.generatedNick)
  t.ok(spec.nick)
  t.absent(spec.nick === 'ce6601f481ec')
})

test('slash /query and /msg without args return usage not unknown', async (t) => {
  const h = await load()
  const c = client()
  c.state = h.bareIrcCreateClient({ nick: 'alice' }).state
  const q = h.bareIrcRunSlash(c, '/query', {
    buf: { kind: 'server', name: '*server' }
  })
  t.ok(q.usage && q.usage.indexOf('/query') >= 0)
  t.ok(q.ok)
  const m = h.bareIrcRunSlash(c, '/msg', {
    buf: { kind: 'server', name: '*server' }
  })
  t.ok(m.usage && m.usage.indexOf('/msg') >= 0)
})

test('slash /rooms opens browser; /join sends JOIN', async (t) => {
  const h = await load()
  const c = client()
  c.state = h.bareIrcCreateClient({ nick: 'alice' }).state
  const rooms = h.bareIrcRunSlash(c, '/rooms linux', {
    buf: { kind: 'server', name: '*server' }
  })
  t.ok(rooms.rooms)
  t.is(rooms.roomsQuery, 'linux')
  const j = h.bareIrcRunSlash(c, '/join #libera', {
    buf: { kind: 'server', name: '*server' }
  })
  t.ok(j.ok)
  t.ok(c._writes.some((w) => w.cmd === 'JOIN' && w.params[0] === '#libera'))
})

test('LIST numerics fill channelList; self JOIN switches buffer', async (t) => {
  const h = await load()
  const writes = []
  const sock = {
    writes: writes,
    write: function (x) {
      writes.push(String(x))
      return true
    },
    on: function () {},
    end: function () {}
  }
  const c = h.bareIrcCreateClient({ nick: 'alice' })
  c.attach(sock)
  c.handleMessage({
    command: '322',
    params: ['alice', '#linux', '42', 'Linux talk']
  })
  c.handleMessage({ command: '323', params: ['alice', 'End of /LIST'] })
  t.is(c.state.channelList.length, 1)
  t.is(c.state.channelList[0].name, '#linux')
  t.is(c.state.channelList[0].users, 42)
  c.handleMessage({
    command: 'JOIN',
    nick: 'alice',
    params: ['#linux']
  })
  t.ok(c.state.currentId.indexOf('channel:') === 0)
  const buf = c.state.buffers[c.state.currentId]
  t.is(buf.name, '#linux')
})