// import _ from '@uci/utils/src/byte'
import _ from '../../archive/uci-utils/src/byte'
import { CHIP, PIN } from './config'

export const chip = {
  ack: async function(packet){
    // process packet based on command and any other props into a bus packet
    let bus_packet = { cmd:'scan'}
    // console.log(packet.num)
    let bus_reply = await this.busSend(bus_packet)
    if (bus_reply.error) return bus_reply
    let res = { cmd:'reply', _req:packet, _reqBus:bus_packet, ack: false, address:this.address}
    if (bus_reply.response.indexOf(parseInt(this.address,16))!=-1) res.ack = true
    return res
  },
  cfg: async function(packet){
    let setting = {}
    let cfg = packet.cfg || 'default'
    if (cfg === 'custom') setting = {val:packet.setting, fmt:packet.fmt || 'STR'}
    else {
      if (CHIP[cfg]) setting = CHIP[cfg]
      else return {error:`no chip settings for ${cfg}`}
    }
    let byte = _.byteFormat(setting.val, { in: setting.fmt, out: 'DEC' })
    let bus_packet = { cmd:'write', args: {address:this.address, cmd:CHIP.cmd, byte:byte}}
    // console.log ('writing mcp chip config', bus_packet)
    let bus_reply = await this.busSend(bus_packet)
    if (bus_reply.error) return bus_reply
    let res = { cmd:'reply', _req:packet, _reqBus:bus_packet , response:bus_reply.response}
    return res
  }
}


// async writePinsCfg() {
//   debug.L1('writing mcp pins config')
//   for (let port in this.ports) {
//     for (let setting in registers.pin_config) {
//       let reg = registers.pin_config[setting]
//       // TODO 0x10 should be based on chip config
//       let byte = 0
//       for (let pin of this.ports[port].pins) {
//         byte += pin.address * pin.cfg[setting]
//         debug.L3(`port: ${ port } pin: ${pin.id} setting: ${ setting } reg: ${ reg } byte: ${ byte }`)
//       }
//       await this.write(portReg(reg, port), byte)
//     }
//   }
//   debug.L1('done writing mcp pins config')
// } // end writePinsCfg



// Individual Pin Configurations
// set is for cfg: 'custom'  assume a setting is zero unless given
// packet = { pin:, port:, cfg: , set:{dir: 0, ivrt: 0, pullup: 0, intr: 0, usedef: 0,defval: 0} }
// first get the current byte (pin) state for that setting
export const pin = {
  cfg: async function(packet){
    let cfg = {}
    let reply = { cmd:'reply', _req:packet, response:{} }
    packet.cfg = packet.cfg || 'output'
    if (packet.cfg==='custom') cfg = packet.set
    else cfg = PIN.cfgset[packet.cfg]
    for(let name of Object.keys(PIN.setting)) {
      let op = cfg[name] ? 'on' : 'off'
      console.log(name, op)
      let busreply = await state.bind(this)(packet,op,PIN.setting[name])
      if (busreply.error) return busreply
      reply.response[name] = reply.status
    }
    console.log('==============')
    return reply
  },


  // cfg: async function(packet){
  //   let shift = 0
  //   let cfg = {}
  //   let reply = { cmd:'reply', _req:packet, response:{} }
  //   if (packet.port === 'B') shift= 0x10  // TODO check on shift amount
  //   packet.cfg = packet.cfg || 'output'
  //   if (packet.cfg==='custom') cfg = packet.set
  //   else cfg = PIN.cfgset[packet.cfg]
  //   let pins = parsePins(packet.pins)
  //   let state = new _.Byte()
  //   for(let name of Object.keys(PIN.setting)) {
  //     let bus_packet = { cmd:'read', args: {address:this.address, cmd:PIN.setting[name]+shift }  }
  //     let bus = await this.busSend(bus_packet)
  //     if (bus.error) return bus
  //     state.value = bus.response
  //     let op = cfg[name] ? 'on' : 'off'
  //     console.log(name, op)
  //     console.log(state.toFmt('ARY'))
  //     console.log(pins.toFmt('ARY'))
  //     bus_packet = { cmd:'write', args: {address:this.address, cmd:PIN.setting[name]+shift, byte:state.bwOp(pins.value,op,{in:'PLC', out:'DEC'}) }  }
  //     bus = await this.busSend(bus_packet)
  //     if (bus.error) return bus
  //     bus_packet = { cmd:'read', args: {address:this.address, cmd:PIN.setting[name]+shift }  }
  //     bus = await this.busSend(bus_packet)
  //     if (bus.error) return bus
  //     state.value = bus.response
  //     console.log(state.toFmt('ARY'))
  //     reply.response[name] = state.bwOp(pins.value,'check',{in:'PLC', out:'PLC'})
  //   }
  //   console.log('==============')
  //   return reply
  // },

  // state is equivalent to read
  status: packet => {
  },
  // threse three only for output pins
  state : {
    on: async function (packet) {
      return state.bind(this)(packet,'on')
    },
    off: async function (packet) {
      return state.bind(this)(packet,'off')
    },
    toggle: async function (packet) {
      return state.bind(this)(packet,'toggle')
    }
  },
  // // will create packet to determine pin caused interrupt, packet will come from interrupt module
  // interrupt: {
  //   find: packet =>{},
  //   report: packet=>{} // come here after determining which pin to report to requester
  // }
}

const parsePins = function(pins) {
  if (typeof pins==='number') pins = [pins]
  if (typeof pins==='string') {
    if (pins==='all') pins = _.byteFormat(255,{in:'DEC', out:'PLC'})
    else pins = pins.split(',')
  }
  return new _.Byte(pins,'PLC')
}

let busPacket = function (cmd,reg,byte,port) {
  if (typeof byte==='string') port = byte
  let shift = (port==='B') ? 0x10 : 0
  return { cmd:cmd, args: {address:this.address, cmd:reg+shift, byte:byte } }
}

const state = async function(packet,op,reg){
  busPacket = busPacket.bind(this)
  reg = (reg!==undefined)? reg : PIN.cmd.gpio
  console.log(op, reg)
  let reply = { cmd:'reply', _req:packet}
  let pins = parsePins(packet.pins)
  let state = new _.Byte()
  let bus = await this.busSend(busPacket('read',reg, packet.port))
  if (bus.error) return bus
  state.value = bus.response
  console.log(state.toFmt('ARY'))
  console.log(pins.toFmt('ARY'))
  // bus_packet = { cmd:'write', args: {address:this.address, cmd:reg+shift, byte:state.bwOp(pins.value,op,{in:'PLC', out:'DEC'}) }  }
  bus = await this.busSend(busPacket('write',reg,state.bwOp(pins.value,op,{in:'PLC', out:'DEC'}),packet.port))
  if (bus.error) return bus
  bus = await this.busSend(busPacket('read',reg, packet.port))
  if (bus.error) return bus
  state.value = bus.response
  console.log(state.toFmt('ARY'))
  reply.status = state.bwOp(pins.value,'check',{in:'PLC', out:'PLC'})
  return reply
}