// Run: node tests/screens-control.mjs
import assert from 'node:assert/strict'
import { readFileSync } from 'node:fs'
import { runInNewContext } from 'node:vm'

import ts from 'typescript'
import * as vue from 'vue'
import { compileScript, parse } from 'vue/compiler-sfc'

function source(name) {
  return parse(readFileSync(new URL(`../src/components/${name}.vue`, import.meta.url), 'utf8'))
    .descriptor
}
function setup(name, props) {
  const script = compileScript(source(name), { id: name })
  const context = { exports: {}, require: (name) => (name === 'vue' ? vue : {}) }
  runInNewContext(ts.transpile(script.content, { module: ts.ModuleKind.CommonJS }), context)
  const events = []
  const scope = vue.effectScope()
  const state = scope.run(() =>
    context.exports.default.setup(props, {
      expose() {},
      emit: (...event) => events.push(structuredClone(event)),
    }),
  )
  return { state, events, stop: () => scope.stop() }
}
const playlist = (id, ids) => ({
  ID: id,
  name: `Плейлист ${id}`,
  tracks: ids.map((ID) => ({ ID, name: `Трек ${ID}` })),
})
const props = vue.reactive({
  playlists: [playlist(1, [11, 12]), playlist(2, [21, 22])],
  music: { playlist: playlist(1, [11, 12]), playback: 'MUSIC_PLAYBACK_PLAYING', trackIndex: 0 },
  isBusy: false,
})
const panel = setup('GameMusicPlanPanel', props)
panel.state.edit()
await vue.nextTick()
panel.state.selectedId.value = 2
await vue.nextTick()
assert.equal(panel.events.length, 0, 'Selecting an editor playlist must not change game music')
panel.state.uploadTrack({ file: { file: { name: 'test.mp3' } } })
assert.deepEqual(panel.events.at(-1), ['uploadTrack', 2, { name: 'test.mp3' }])
panel.state.move(0, 1)
assert.deepEqual(Array.from(panel.state.order.value), [22, 21])
props.playlists = [playlist(1, [11, 12]), playlist(2, [21, 22])]
await vue.nextTick()
assert.deepEqual(Array.from(panel.state.order.value), [22, 21], 'Polling must preserve draft order')
props.playlists = [playlist(1, [11, 12]), playlist(2, [21, 22, 23])]
await vue.nextTick()
assert.equal(panel.state.hasConflict.value, true)
assert.deepEqual(Array.from(panel.state.order.value), [22, 21])
panel.state.reset()
assert.deepEqual(Array.from(panel.state.order.value), [21, 22, 23])
panel.state.move(0, 1)
props.playlists = [playlist(1, [11, 12]), playlist(2, [22, 21, 23])]
await vue.nextTick()
assert.equal(
  panel.state.isOrderDirty.value,
  false,
  'Successful save must accept the returned order',
)
panel.state.name.value = 'Несохранённое название'
props.playlists = [playlist(1, [11, 12])]
await vue.nextTick()
assert.equal(
  panel.state.name.value,
  'Несохранённое название',
  'Remote deletion must preserve the draft',
)
assert.equal(panel.state.selectedId.value, 2)
panel.state.reset()
assert.equal(panel.state.selectedId.value, null)
assert.equal(panel.state.playbackLabel.value, 'Пауза')
props.music.playback = 'MUSIC_PLAYBACK_PAUSED'
assert.equal(panel.state.playbackLabel.value, 'Продолжить')
props.music.playback = 'MUSIC_PLAYBACK_STOPPED'
assert.equal(panel.state.playbackLabel.value, 'Старт')
panel.state.newName.value = 'Черновик нового плейлиста'
props.playlists = [playlist(1, [11, 12]), playlist(3, [31, 32])]
await vue.nextTick()
assert.equal(panel.state.newName.value, 'Черновик нового плейлиста', 'Background library updates must preserve a new playlist name')
panel.stop()

const screenProps = vue.reactive({
  screens: [{ status: 'connected', timerState: 'SCREEN_TIMER_STATE_RUNNING' }],
  previewQuestions: [],
  previewTeams: [],
  screenPlanDraft: [],
  screenPlanSaving: false,
  screenPlanMode: 'use',
  screenVolume: 100,
  isBusy: false,
})
const screens = setup('GameScreenPlanPanel', screenProps)
for (const [timerState, command] of [
  ['RUNNING', 'PAUSE'],
  ['PAUSED', 'RESUME'],
  ['STOPPED', 'START'],
  ['FINISHED', 'START'],
]) {
  screenProps.screens[0].timerState = `SCREEN_TIMER_STATE_${timerState}`
  assert.equal(screens.state.timerControl.value.command, `SCREEN_COMMAND_TIMER_${command}`)
}
screenProps.screens = []
assert.equal(screens.state.hasConnectedScreen.value, false)
assert.equal(
  screens.state.thumbnail({ mode: 'SCREEN_MODE_TEXT', text: 'Offline draft' }).text,
  'Offline draft',
)
screens.stop()

function functions(name, names) {
  const text = source(name).scriptSetup.content
  const ast = ts.createSourceFile(`${name}.ts`, text, ts.ScriptTarget.Latest, true)
  return ast.statements
    .filter((item) => ts.isFunctionDeclaration(item) && names.includes(item.name.text))
    .map((item) => item.getText(ast))
    .join('\n')
}
const errors = []
const calls = []
const state = {
  Error,
  music: vue.ref({
    playlist: playlist(1, [11, 12]),
    positionMs: 5000,
    playback: 'MUSIC_PLAYBACK_PLAYING',
  }),
  playlists: vue.ref([]),
  isMusicBusy: vue.ref(false),
  musicRequestVersion: 0,
  musicSyncedAt: Date.now(),
  gameId: '7',
  message: { error: (error) => errors.push(error), success() {} },
  client: {
    GetGameMusic: async () => ({
      playlists: [playlist(2, [21, 22])],
      state: { playlist: playlist(1, [11, 12]) },
    }),
    SetGameMusic: async (request) => {
      calls.push(request)
      return { state: { ...state.music.value, ...request } }
    },
    DeletePlaylistTrack: async (request) => {
      calls.push(request)
    },
    UploadPlaylistTrack: async (request) => {
      calls.push(request)
    },
    ReorderPlaylistTracks: async () => {
      throw new Error('Save failed')
    },
  },
  btoa: (value) => Buffer.from(value, 'binary').toString('base64'),
}
runInNewContext(
  ts.transpile(
    functions('GamePage', [
      'getGameMusic',
      'setGameMusic',
      'deleteTrack',
      'uploadTrack',
      'uint8ToBase64',
      'reorderTracks',
    ]),
    { target: ts.ScriptTarget.ES2022 },
  ),
  state,
)
await state.deleteTrack(2, 21)
assert.deepEqual({ ...calls.at(-1) }, { playlistID: 2, trackID: 21 })
await state.uploadTrack(2, {
  name: 'test.mp3',
  size: 3,
  arrayBuffer: async () => Uint8Array.from([1, 2, 3]).buffer,
})
assert.equal(calls.at(-1).playlistID, 2)
for (const file of [
  { name: 'empty.mp3', size: 0 },
  { name: 'large.mp3', size: 64 * 1024 * 1024 + 1 },
]) {
  const before = calls.length
  await state.uploadTrack(2, file)
  assert.equal(calls.length, before)
}
const count = calls.length
await state.uploadTrack(2, { name: 'test.png', size: 3 })
assert.equal(calls.length, count)
await state.reorderTracks(2, [22, 21])
assert.equal(errors.at(-1), 'Save failed')
assert.equal(state.isMusicBusy.value, false)
state.music.value = {
  playlist: playlist(1, [11, 12]),
  positionMs: 5000,
  playback: 'MUSIC_PLAYBACK_PLAYING',
}
state.musicSyncedAt = Date.now() - 1500
await state.setGameMusic({ playback: 'MUSIC_PLAYBACK_PAUSED' })
assert.ok(calls.at(-1).positionMs >= 6500, 'Pausing must include time elapsed since the last poll')
let resolvePoll
state.client.GetGameMusic = () =>
  new Promise((resolve) => {
    resolvePoll = resolve
  })
const poll = state.getGameMusic()
await state.setGameMusic({ volume: 40 })
resolvePoll({ state: { volume: 1 }, playlists: [] })
await poll
assert.equal(state.music.value.volume, 40, 'An old poll must not overwrite a successful command')

const planState = {
  Error,
  screenPlanSaving: vue.ref(false),
  screenPlanRequestVersion: 0,
  screenPlanDraft: vue.ref([{ mode: 'SCREEN_MODE_TIMER', timerDurationSeconds: 0 }]),
  screenPlan: vue.ref(),
  screenPlanDirty: vue.ref(true),
  screenPlanMode: vue.ref('edit'),
  gameId: '7',
  message: state.message,
  client: {
    SaveScreenPlan: async () => {
      throw new Error('Plan save failed')
    },
  },
}
runInNewContext(
  ts.transpile(functions('GamePage', ['saveScreenPlan']), { target: ts.ScriptTarget.ES2022 }),
  planState,
)
await planState.saveScreenPlan()
assert.match(errors.at(-1), /шаге 1/)
planState.screenPlanDraft.value[0].timerDurationSeconds = 60
await planState.saveScreenPlan()
assert.equal(errors.at(-1), 'Plan save failed')
assert.equal(planState.screenPlanMode.value, 'edit')
assert.equal(planState.screenPlanDirty.value, true)
assert.equal(planState.screenPlanDraft.value[0].timerDurationSeconds, 60)
assert.equal(planState.screenPlanSaving.value, false)

function watcher(name, observed) {
  const script = source(name).scriptSetup.content
  const ast = ts.createSourceFile(`${name}.ts`, script, ts.ScriptTarget.Latest, true)
  const statement = ast.statements.find(
    (item) =>
      ts.isExpressionStatement(item) &&
      ts.isCallExpression(item.expression) &&
      item.expression.expression.getText(ast) === 'watch' &&
      item.expression.arguments[0].getText(ast) === observed,
  )
  return `const handler = ${statement.expression.arguments[1].getText(ast)}`
}
const media = {
  currentTime: 23,
  volume: 1,
  readyState: 1,
  play() {
    this.played = true
    return Promise.resolve()
  },
  pause() {
    this.paused = true
  },
}
const player = {
  appliedCommandVersion: 0,
  nextTick: vue.nextTick,
  screenMode: vue.ref('SCREEN_MODE_INTRO'),
  introAudioElement: vue.ref(media),
  conclusionVideoElement: vue.ref(null),
  mediaError: vue.ref(''),
}
runInNewContext(
  ts.transpile(watcher('ScreenPage', 'state') + '\nthis.commandHandler = handler', {
    target: ts.ScriptTarget.ES2022,
  }),
  player,
)
for (const [index, command] of ['VOLUME', 'PAUSE', 'RESUME'].entries()) {
  await player.commandHandler({
    command: `SCREEN_COMMAND_${command}`,
    stateVersion: index + 1,
    positionMs: 0,
    volume: 30,
  })
  assert.equal(media.currentTime, 23, `${command} must preserve playback position`)
}
await player.commandHandler({ command: 'SCREEN_COMMAND_REPLAY', stateVersion: 4, positionMs: 0 })
assert.equal(media.currentTime, 0)
const musicPlayer = {
  state: vue.ref({
    music: { playlist: playlist(1, [11]), playback: 'MUSIC_PLAYBACK_PLAYING', positionMs: 0 },
  }),
  nextTick: vue.nextTick,
  musicAudioElement: vue.ref(media),
  waitForMusicMetadata: async () => {},
  mediaError: vue.ref(''),
}
runInNewContext(
  ts.transpile(watcher('ScreenPage', 'musicSyncState') + '\nthis.musicHandler = handler', {
    target: ts.ScriptTarget.ES2022,
  }),
  musicPlayer,
)
media.currentTime = 23
await musicPlayer.musicHandler(
  [1, 0, 'MUSIC_PLAYBACK_PLAYING', 2, 0],
  [1, 0, 'MUSIC_PLAYBACK_PLAYING', 1, 20000],
)
assert.equal(media.currentTime, 0, 'Restarting the current track must reset the player')
media.currentTime = 23
await musicPlayer.musicHandler(
  [1, 0, 'MUSIC_PLAYBACK_PLAYING', 2, 21000],
  [1, 0, 'MUSIC_PLAYBACK_PLAYING', 2, 20000],
)
assert.equal(media.currentTime, 23, 'Polling must not seek the player')
console.log(
  'Screen controls: drafts, conflicts, explicit playlist IDs, timer/music controls, errors, stale polls and playback positions passed',
)