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'
    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'
    let pins = parsePins.call(this, packet.pins || packet.pin)
    packet.res = await pSettle(
      pins.map(pin => {
        return this.pins[pin][packet.pinCmd](packet.value)
      })
    )
    packet = await this.commands.get(packet)
    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,packet.pins || packet.pin)
    packet.pins = {}
    pins.forEach(pin => packet.pins[pin] = this.pins[pin].value)
    packet.cmd = 'status'
    return packet
  }
}

const parsePins = function(pins) {
  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))
    }
  }
  // TODO plain object is pin and value pairs
  return pins
}