import {
  CaretParser,
  CaretNode,
  CaretLeafParselet,
  TokensTag,
} from "@caret-js/core";
import { RadicalToken } from "../tokens/radical";
import { RadicalNode } from "../nodes/radical";

export class RadicalParselet extends CaretLeafParselet {
  parse(parser: CaretParser): CaretNode {
    const token = parser.consume();
    this.assert(token instanceof RadicalToken, "Expected RadicalToken");

    const index = token.index ? parser.parseSubStrand(token.index) : null;
    const radicand = parser.parseSubStrand(token.radicand);

    return RadicalNode.from(radicand, index).addTag(new TokensTag([token]));
  }
}