import { reorderOnIdList } from "@/utils/list";
import { describe, it, expect } from "vitest";

function list(def: string) {
  return def.split(",").map(v=>({
    rank: parseInt(v),
    id: v,
  }))
}

function expectListToEqual(l1: ReturnType<typeof list>, l2: ReturnType<typeof list>) {
  function flatten(l: ReturnType<typeof list>) {
    return l.map(v=>v.id).join(",");
  }
  expect(flatten(l1)).toEqual(flatten(l2));
}

describe('reorderOnIdList()', () => {
  it('should reorder based on rank', () => {
    const l = list('2,1,4,3');
    const sortedList = list('4,3,2,1')
    expectListToEqual(reorderOnIdList([], l), sortedList);
  });

  it('should work with empty input', () => {
    expectListToEqual(reorderOnIdList([], []), []);
  });
  
  it('should reorder based on id list', () => {
    const l = list('4,2,1,3');
    const sortedList = list('4,3,2,1')
    expectListToEqual(reorderOnIdList(["4","3","2","1"], l), sortedList);
  });
  
  it('should reorder based on id list and rank second', () => {
    const l = list('4,2,1,3');
    const sortedList = list('4,3,2,1')
    expectListToEqual(reorderOnIdList(["4","3"], l), sortedList);
  });
  
  it('should work with only one item', () => {
    const l = list('1');
    const sortedList = list('1')
    expectListToEqual(reorderOnIdList(["1"], l), sortedList);
    expectListToEqual(reorderOnIdList([], l), sortedList);
  });

  it('should not affect original list', () => {
    const l = list('4,3,2,1');
    const unsortedList = list('4,3,2,1')
    reorderOnIdList([], l);
    expectListToEqual(l, unsortedList);
  });
});