import Token from '../token';

export class Selector {
  public name: Token;
  public parents: Selector[];

  public constructor(name: Token, parents: Selector[] = []) {
    this.name = name;
    this.parents = parents;
  }

  public getLineages(): string[] {
    if (this.parents.length === 0) return [this.name.value];
    return Array.prototype.concat(
      ...this.parents.map((parent) => {
        return parent.getLineages().map((lineage) => {
          if (this.name.value.match(/&/)) {
            return this.name.value.replace('&', lineage);
          }
          return lineage + ' ' + this.name.value;
        });
      })
    );
  }
}