import * as I from 'immutable';

import {Packet} from '@avocado/packet';

export class InputPacket extends Packet {

  static get schema() {
    return {
      ...super.schema,
      data: [
        ['string'],
        ['varint'],
      ],
    };
  }

  static fromState(state) {
    const data = [[], []];
    const [actions, values] = data;
    for (const [action, value] of state.entries()) {
      actions.push(action);
      values.push(parseInt(value));
    }
    return new InputPacket(data);
  }

  toState() {
    const [actions, values] = this.data;
    return I.Map().withMutations((state) => {
      for (let i = 0; i < actions.length; ++i) {
        state.set(actions[i], values[i]);
      }
    });
  }

}