const pSettle = require('p-settle')
import logger from '@uci-utils/logger'
let log = logger({package:'@uci/gpio', file:'/src/commands.js'})

export default {
  on: async function(packet) {
    packet.pinCmd = 'on'
    await this.commands.set(packet)
    return packet
  },
  off: async function(packet) {
    packet.pinCmd = 'off'
    await this.commands.set(packet)
    return packet
  },
  toggle: async function(packet) {
    packet.pinCmd = 'toggle'
    await this.commands.set(packet)
    return packet
  },
  set: async function(packet) {
    packet.pinCmd = packet.pinCmd || 'set'
    log.debug({msg:'packet set request', packet:packet})
    let pins = parsePins.call(this, packet.pins || packet.pin || packet.gpios || packet.gpio || packet.ids || packet.id )
    log.debug({msg:'pins to set', packet:packet, pins:pins})
    // TODO could use this but need a way to know which res item is for what pin
    // packet.res = await pSettle(
    //   pins.map(async pin => {
    //     return this.pins[pin][packet.pinCmd](packet.value)
    //   }), {concurrency:1}
    // )
    packet.state = {}
    for (let pin of pins) {
      packet.state[pin] = await this.pins[pin][packet.pinCmd](packet.value)
    }
    log.info({msg:'pin(s) set result', packet:packet})
    packet.cmd='status'
    this.emit('gpios',packet) // emit locally
    this.push(packet) // will push on any socket
    return packet
  },

  get: async function(packet) {
    let pins = parsePins.call(this, this, packet.pins || packet.pin || packet.gpios || packet.gpio || packet.ids || packet.id)
    packet.state = {}
    pins.forEach(pin => packet.state[pin] = this.pins[pin].get(packet.read))
    packet.cmd = 'status'
    return packet
  }
}

const parsePins = function(pins) {
  if (!pins) {
    console.log('no pins supplied aborting')
    throw new Error('no pins specified in command')
  }
  if (typeof pins==='number') pins = [pins]
  if (typeof pins==='string') {
    if (pins==='all') pins = Object.keys(this.pins)
    else {
      pins = pins.split(/[,:\s]+/).map(Number).filter( (x) => !Number.isNaN(x))
    }
  }
  if (pins.some(pin => !(pin in this.pins),this)) console.log('pin not available')
  return pins
}