import {FieldContext} from './FieldContext';
import {ChildrenBucket, HasChildQuery} from "../query_dsl"
const get = require("lodash/get")

export class ChildrenFieldContext extends FieldContext {

  constructor(fieldOptions){
    super(fieldOptions)
    if(!get(this.fieldOptions, "options.childType")){
      throw new Error("fieldOptions type:children requires options.childType")
    }
  }


  getAggregationPath(){
    return "inner"
  }
  wrapAggregations(...aggregations){
    return [ChildrenBucket(
      "inner",
      this.fieldOptions.options.childType,
      ...aggregations
    )]
  }
  wrapFilter(filter){
    return HasChildQuery(
      this.fieldOptions.options.childType,
      filter,
      this.fieldOptions.options
    )
  }
}