import type { AudioOutputInfo } from '../src/types/screen.js'

export class AudioOutput {
  devices: AudioOutputInfo[] = []
  notice = ''
  private pending: Promise<unknown> = Promise.resolve()
  constructor(
    public selected: string,
    private enumerate: () => Promise<AudioOutputInfo[]>,
    private apply: (id: string) => Promise<void>,
    private save: (id: string) => void,
  ) {}
  private enqueue<T>(operation: () => Promise<T>): Promise<T> {
    const result = this.pending.then(operation)
    this.pending = result.catch(() => {})
    return result
  }
  refresh() {
    return this.enqueue(async () => {
      this.devices = await this.enumerate()
      if (this.selected && !this.devices.some((device) => device.id === this.selected)) {
        await this.apply('')
        this.selected = ''
        this.notice = 'Устройство звука отключено. Используется устройство по умолчанию в системе.'
        this.save('')
      }
    })
  }
  select(id: unknown) {
    return this.enqueue(async () => {
      if (typeof id !== 'string' || (id !== '' && !this.devices.some((d) => d.id === id)))
        throw new Error('Устройство вывода звука недоступно')
      const previous = this.selected
      try {
        await this.apply(id)
        this.save(id)
      } catch (error) {
        try {
          await this.apply(previous)
        } catch {
          this.notice = 'Не удалось восстановить устройство звука. Выберите устройство заново.'
        }
        throw error
      }
      this.selected = id
      this.notice = ''
    })
  }
  prepare(apply: (id: string) => Promise<void>) {
    return this.enqueue(() => apply(this.selected))
  }
}