'use strict';

const types = require('../../tokenizer/types.cjs');

const name = 'Function';
const walkContext = 'function';
const structure = {
  name: String,
  children: [[]],
};

// <function-token> <sequence> )
function parse(readSequence, recognizer) {
  const start = this.tokenStart;
  const name = this.consumeFunctionName();
  const nameLowerCase = name.toLowerCase();
  let children;

  children =
    recognizer.hasOwnProperty(nameLowerCase) ?
      recognizer[nameLowerCase].call(this, recognizer)
    : readSequence.call(this, recognizer);

  if (!this.eof) {
    this.eat(types.RightParenthesis);
  }

  return {
    type: 'Function',
    loc: this.getLocation(start, this.tokenStart),
    name,
    children,
  };
}

function generate(node) {
  this.token(types.Function, node.name + '(');
  this.children(node);
  this.token(types.RightParenthesis, ')');
}

exports.generate = generate;
exports.name = name;
exports.parse = parse;
exports.structure = structure;
exports.walkContext = walkContext;