import { ValidatedMethod } from 'meteor/mdg:validated-method';
import { RateLimiterMixin } from 'ddp-rate-limiter-mixin';
import SimpleSchema from 'simpl-schema';
import CreatureProperties from '/imports/api/creature/creatureProperties/CreatureProperties.js';
import getRootCreatureAncestor from '/imports/api/creature/creatureProperties/getRootCreatureAncestor.js';
import { assertEditPermission } from '/imports/api/sharing/sharingPermissions.js';
import recomputeInventory from '/imports/api/creature/denormalise/recomputeInventory.js';
import { recomputeCreatureByDoc } from '/imports/api/creature/computation/methods/recomputeCreature.js';

const adjustQuantity = new ValidatedMethod({
  name: 'creatureProperties.adjustQuantity',
  validate: new SimpleSchema({
    _id: SimpleSchema.RegEx.Id,
    operation: {
      type: String,
      allowedValues: ['set', 'increment']
    },
    value: Number,
  }).validator(),
  mixins: [RateLimiterMixin],
  rateLimit: {
    numRequests: 5,
    timeInterval: 5000,
  },
  run({_id, operation, value}) {
    // Permissions
		let property = CreatureProperties.findOne(_id);
    let rootCreature = getRootCreatureAncestor(property);
		assertEditPermission(rootCreature, this.userId);

    // Do work
    adjustQuantityWork({property, operation, value});

    // Changing quantity does not change dependencies, but recomputing the
    // inventory changes many deps at once, so recompute fully
    recomputeCreatureByDoc(rootCreature);
    recomputeInventory(rootCreature._id);
  },
});

export function adjustQuantityWork({property, operation, value}){
  // Check if property has quantity
  let schema = CreatureProperties.simpleSchema(property);
  if (!schema.allowsKey('quantity')){
    throw new Meteor.Error(
      'Adjust quantity failed',
      `Property of type "${property.type}" doesn't have a quantity`
    );
  }
  if (operation === 'set'){
    CreatureProperties.update(property._id, {
      $set: {quantity: value}
    }, {
      selector: property
    });
  } else if (operation === 'increment'){
    // value here is 'damage'
    value = -value;
    let currentQuantity = property.quantity;
    if (currentQuantity + value < 0) value = -currentQuantity;
    CreatureProperties.update(property._id, {
      $inc: {quantity: value}
    }, {
      selector: property
    });
  }
}

export default adjustQuantity;