import { PlatformAccessory, Service } from 'homebridge'
import { ContentItem, KeyValue, SourceStatus } from '@bossoq/soundtouch-api'
import { deviceIsOn } from './sound-touch-device'
import { SoundTouchVolume } from './sound-touch-volume'
import { SoundTouchLightbulbVolume } from './sound-touch-lightbulb-volume'
import { SoundTouchSpeakerVolume } from './sound-touch-speaker-volume'
import { callbackify, HomebridgeAccessoryWrapper } from './utils'
import {
  DeviceOnOffListener,
  HomebridgeContextProps,
  SoundTouchDevice,
  VolumeMode,
} from './types'

interface SoundTouchSelectedSource {
  readonly sourceItem?: ContentItem
  readonly presetIndex?: number
}

export class SoundTouchAccessoryWrapper
  extends HomebridgeAccessoryWrapper<SoundTouchDevice>
  implements DeviceOnOffListener
{
  private readonly volume?: SoundTouchVolume
  private readonly onService: Service
  private readonly presetServices: Service[]
  private readonly sourceServices: Service[]
  private readonly informationService: Service

  private static readonly presetValues: KeyValue[] = [
    KeyValue.preset1,
    KeyValue.preset2,
    KeyValue.preset3,
    KeyValue.preset4,
    KeyValue.preset5,
    KeyValue.preset6,
  ]

  constructor(
    context: HomebridgeContextProps,
    accessory: PlatformAccessory,
    device: SoundTouchDevice
  ) {
    super(context, accessory, device)

    this.informationService = this.initInformationService()
    this.onService = this.initOnService()
    this.volume = this.initVolumeService()
    this.presetServices = this.initPresetServices()
    this.sourceServices = this.initSourceServices()

    if (this.device.verbose === true)
      this.log(`[${this.getDisplayName()}] Device ready`)
    if (this.device.pollingInterval !== undefined)
      this._refreshDeviceServices().then(() => this.log('Infinite loop'))
  }

  public getDisplayName(): string {
    return this.device.name
  }

  private initVolumeService(): SoundTouchVolume | undefined {
    if (this.device.volumeSettings.mode !== VolumeMode.none) {
      if (this.device.volumeSettings.mode === VolumeMode.speaker) {
        SoundTouchLightbulbVolume.clearServices(this)
        return new SoundTouchSpeakerVolume(this.device, this)
      }
      if (this.device.volumeSettings.mode === VolumeMode.lightbulb) {
        SoundTouchSpeakerVolume.clearServices(this)
        return new SoundTouchLightbulbVolume(this.device, this)
      }
    }
    SoundTouchLightbulbVolume.clearServices(this)
    SoundTouchSpeakerVolume.clearServices(this)
    return undefined
  }

  private initOnService(): Service {
    const onService = this.getService(
      this.Service.Switch,
      this.getDisplayName(),
      'onService'
    )
    onService
      .getCharacteristic(this.Characteristic.On)
      .on(
        'get',
        callbackify(async () => {
          const isOn = await deviceIsOn(this.device)
          if (this.device.verbose)
            this.log(`[${this.getDisplayName()}] ${isOn ? 'On' : 'Off'}`)
          return isOn
        })
      )
      .on('set', callbackify(this.setOn.bind(this)))
    return onService
  }

  private initPresetServices(): Service[] {
    const presetServices = []
    for (let i = 1; i <= 6; i++) {
      const presetType = _presetIndexToServiceType(i)
      const preset = this.device.presets.find((p) => p.index === i)
      if (preset === undefined) {
        this.removeService(this.Service.Switch, presetType)
        continue
      }
      const service = this.getService(
        this.Service.Switch,
        preset.name,
        presetType
      )
      const characteristic = service.getCharacteristic(this.Characteristic.On)
      characteristic.on(
        'get',
        callbackify(() => this.isSelectedPreset(preset.index))
      )
      characteristic.on(
        'set',
        callbackify((on: boolean) => this.setPreset(on, preset.index))
      )
      presetServices.push(service)
    }
    return presetServices
  }

  private initSourceServices(): Service[] {
    const sourceServices = []
    for (let src of this.device.sources) {
      const sourceType = _sourceToServiceType(src.source, src.account)
      if (src.enabled === false) {
        this.removeService(this.Service.Switch, sourceType)
        continue
      }
      const service = this.getService(this.Service.Switch, src.name, sourceType)
      const characteristic = service.getCharacteristic(this.Characteristic.On)
      characteristic.on(
        'get',
        callbackify(() => this.isSelectedSource(src.source, src.account))
      )
      characteristic.on(
        'set',
        callbackify((on: boolean) =>
          this.setSource(on, src.source, src.account)
        )
      )
      sourceServices.push(service)
    }
    return sourceServices
  }

  private initInformationService(): Service {
    const informationService = this.accessory.getService(
      this.Service.AccessoryInformation
    )
    informationService
      .setCharacteristic(this.Characteristic.Name, this.getDisplayName())
      .setCharacteristic(this.Characteristic.Manufacturer, 'Bose')
      .setCharacteristic(this.Characteristic.Model, this.device.model)
      .setCharacteristic(this.Characteristic.SerialNumber, this.device.id)
    if (this.device.version)
      informationService.setCharacteristic(
        this.Characteristic.FirmwareRevision,
        this.device.version
      )
    return informationService
  }

  public async setOn(on: boolean, updateOn?: boolean): Promise<boolean> {
    const nowPlaying = await this.device.api.getNowPlaying()
    let success = false
    if (nowPlaying.source === SourceStatus.standBy) {
      if (on) {
        success = await this.device.api.pressKey(KeyValue.power)
        if (!success) return false
        success = await this.deviceDidTurnOn(updateOn, true)
        if (!success) return false
        await new Promise((resolve) => setTimeout(resolve, 500))
        const selectedSource = await this.getSelectedSource()
        this.switchSelectedSource(on, selectedSource)
      }
    } else if (!on) {
      const selectedSource = await this.getSelectedSource()
      success = await this.device.api.pressKey(KeyValue.power)
      if (!success) return false
      success = await this.deviceDidTurnOff(updateOn, true)
      this.switchSelectedSource(on, selectedSource)
    }
    return success
  }

  private async getSelectedSource(): Promise<
    SoundTouchSelectedSource | undefined
  > {
    const nowPlaying = await this.device.api.getNowPlaying()
    if (nowPlaying.source === SourceStatus.standBy) return undefined
    const presets = await this.device.api.getPresets()
    for (const preset of presets) {
      if (
        JSON.stringify(preset.contentItem) ===
        JSON.stringify(nowPlaying.contentItem)
      ) {
        return {
          presetIndex: preset.id,
        }
      }
    }
    return {
      sourceItem: {
        source: nowPlaying.source,
        sourceAccount: nowPlaying.sourceAccount,
      },
    }
  }

  private async isSelectedPreset(index: number): Promise<boolean> {
    const selectedPreset = await this.getSelectedSource()
    if (selectedPreset !== undefined) {
      if (selectedPreset.presetIndex === index) {
        if (this.device.verbose)
          this.log(`[${this.getDisplayName()}] current preset n°${index}`)
        return true
      }
    }
    return false
  }

  private async setPreset(on: boolean, index: number): Promise<boolean> {
    let success = false
    if (on) {
      const isOn = await deviceIsOn(this.device)
      if (!isOn) {
        success = await this.setOn(on, true)
        if (!success) return false
      }
      const selectedSource = await this.getSelectedSource()
      success = await this.device.api.pressKey(
        SoundTouchAccessoryWrapper.presetValues[index - 1]
      )
      if (!success) return false
      if (success) {
        if (this.device.verbose)
          this.log(`[${this.getDisplayName()}] set preset n°${index}`)
        this.switchSelectedSource(false, selectedSource)
      }
    } else {
      success = await this.setOn(on, true)
    }
    return success
  }

  public async deviceDidTurnOn(
    updateOn?: boolean,
    updateVolume?: boolean
  ): Promise<boolean> {
    let success = true
    if (this.device.verbose) this.log(`[${this.getDisplayName()}] turn on`)
    if (updateOn === true) {
      this.onService.getCharacteristic(this.Characteristic.On).updateValue(true)
      if (this.volume !== undefined)
        this.volume.getMuteCharacteristic().updateValue(true)
    }
    if (
      this.volume !== undefined &&
      updateVolume === true &&
      this.device.volumeSettings.onValue >= 0
    ) {
      success = await this.volume.setVolume(
        this.device.volumeSettings.onValue,
        true
      )
    }
    return success
  }

  public async deviceDidTurnOff(
    updateOn?: boolean,
    updateVolume?: boolean
  ): Promise<boolean> {
    if (this.device.verbose) this.log(`[${this.getDisplayName()}] turn off`)
    if (updateOn === true)
      this.onService
        .getCharacteristic(this.Characteristic.On)
        .updateValue(false)
    if (updateVolume === true)
      this.volume.getMuteCharacteristic().updateValue(false)
    return true
  }

  private switchSelectedSource(
    on: boolean,
    selectedSource?: SoundTouchSelectedSource
  ): void {
    if (selectedSource) {
      if (selectedSource.presetIndex !== undefined) {
        this.switchPresetService(on, selectedSource.presetIndex)
      } else if (selectedSource.sourceItem !== undefined) {
        this.switchSourceService(
          on,
          selectedSource.sourceItem.source,
          selectedSource.sourceItem.sourceAccount
        )
      }
    }
  }

  private switchService(on: boolean, type: string, services: Service[]) {
    for (const service of services) {
      if (service.subtype === type) {
        service.getCharacteristic(this.Characteristic.On).updateValue(on)
        return
      }
    }
  }

  private switchPresetService(on: boolean, index: number): void {
    this.switchService(
      on,
      _presetIndexToServiceType(index),
      this.presetServices
    )
  }

  private switchSourceService(
    on: boolean,
    source: string,
    account?: string
  ): void {
    this.switchService(
      on,
      _sourceToServiceType(source, account),
      this.sourceServices
    )
  }

  private async isSelectedSource(
    source: string,
    account: string
  ): Promise<boolean> {
    const selectedSource = await this.getSelectedSource()
    if (selectedSource !== undefined) {
      const sourceItem = selectedSource.sourceItem
      if (
        sourceItem !== undefined &&
        sourceItem.source === source &&
        sourceItem.sourceAccount === account
      ) {
        if (this.device.verbose)
          this.log(
            `[${this.getDisplayName()}] current source: '${source}', account: '${account}'`
          )
        return true
      }
    }
    return false
  }

  private async setSource(
    on: boolean,
    source: string,
    account: string
  ): Promise<boolean> {
    let success = false
    if (on) {
      const isOn = await deviceIsOn(this.device)
      if (!isOn) {
        success = await this.setOn(on, true)
        if (!success) return false
      }
      const selectedSource = await this.getSelectedSource()
      success = await this.device.api.selectSource({
        source: source,
        sourceAccount: account,
      })
      if (success) {
        if (this.device.verbose)
          this.log(
            `[${this.getDisplayName()}] select source: '${source}', account: '${account}'`
          )
        this.switchSelectedSource(false, selectedSource)
      }
    } else {
      success = await this.setOn(on, true)
    }
    return success
  }

  private async _refreshDeviceServices(): Promise<void> {
    await new Promise((resolve) =>
      setTimeout(resolve, this.device.pollingInterval)
    )
    const selectedSource = await this.getSelectedSource()
    const onCharacteristic = this.onService.getCharacteristic(
      this.Characteristic.On
    )
    if (selectedSource !== undefined) {
      onCharacteristic.updateValue(true)
      const presetType =
        selectedSource.presetIndex !== undefined
          ? _presetIndexToServiceType(selectedSource.presetIndex)
          : undefined
      this.presetServices.forEach((service) => {
        const presetOnCharacteristic = service.getCharacteristic(
          this.Characteristic.On
        )
        presetOnCharacteristic.updateValue(service.subtype === presetType)
      })
      const sourceType =
        selectedSource.sourceItem !== undefined
          ? _sourceToServiceType(
              selectedSource.sourceItem.source,
              selectedSource.sourceItem.sourceAccount
            )
          : undefined
      this.sourceServices.forEach((service) => {
        const sourceOnCharacteristic = service.getCharacteristic(
          this.Characteristic.On
        )
        sourceOnCharacteristic.updateValue(service.subtype === sourceType)
      })
      const deviceVolume = await this.device.api.getVolume()
      if (this.volume) {
        this.volume.getVolumeCharacteristic().updateValue(deviceVolume.actual)
        this.volume.getMuteCharacteristic().updateValue(!deviceVolume.isMuted)
      }
    } else {
      onCharacteristic.setValue(false)
      this.presetServices.forEach((service) =>
        service.getCharacteristic(this.Characteristic.On).updateValue(false)
      )
      this.sourceServices.forEach((service) =>
        service.getCharacteristic(this.Characteristic.On).updateValue(false)
      )
      if (this.volume) this.volume.getMuteCharacteristic().updateValue(false)
    }
    return this._refreshDeviceServices()
  }
}

const _sourceToServiceType = (source: string, account?: string): string => {
  return `${source.toLowerCase()}${account || ''}Service`
}

const _presetIndexToServiceType = (index: number): string => {
  return `preset${index}Service`
}