import { Record } from "../interfaces/dataUnit.js";
import { compareValues } from '../metadata/DataType.js';
import { FieldDescriptor } from '../metadata/UnitMetadata.js';

export class FieldComparator {

  public static compare(field: FieldDescriptor, recordA: Record, recordB: Record, asc: boolean = true, onlyLabel: boolean = false): number {
    const valueA = (asc ? recordA : recordB)[field.name];
    const valueB = (asc ? recordB : recordA)[field.name];

    return FieldComparator.compareValues(field, valueA, valueB, onlyLabel);
  }

  public static compareValues(descriptor: FieldDescriptor, valueA: any, valueB: any, onlyLabel: boolean = false): number {
    const undefinedComparison = this.compareUndefined(valueA == undefined, valueB == undefined);
    return (undefinedComparison != undefined) ? undefinedComparison : compareValues(valueA, valueB, descriptor, onlyLabel);
  }

  public static compareUndefined(isUndefinedA: boolean, isUndefinedB: boolean): number | undefined {
    if (!isUndefinedA && !isUndefinedB) return;
    if (isUndefinedA && isUndefinedB) return 0;
    return isUndefinedA ? -1 : 1;
  }
}