/*************************************************************
 *
 *  Copyright (c) 2018-2026 The MathJax Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

/**
 * @file Configuration file for the verb package.
 *
 * @author v.sorge@mathjax.org (Volker Sorge)
 */

import { HandlerType, ConfigurationType } from '../HandlerTypes.js';
import { Configuration } from '../Configuration.js';
import { TexConstant } from '../TexConstants.js';
import TexParser from '../TexParser.js';
import { CommandMap } from '../TokenMap.js';
import { ParseMethod } from '../Types.js';
import TexError from '../TexError.js';

// Namespace
const VerbMethods: { [key: string]: ParseMethod } = {
  /**
   * Implements the verbatim notation \verb|...|.
   *
   * @param {TexParser} parser The current tex parser.
   * @param {string} name The name of the calling macro.
   */
  Verb(parser: TexParser, name: string) {
    const c = parser.GetNext();
    const start = ++parser.i;
    if (c === '') {
      throw new TexError('MissingArgFor', 'Missing argument for %1', name);
    }
    while (
      parser.i < parser.string.length &&
      parser.string.charAt(parser.i) !== c
    ) {
      parser.i++;
    }
    if (parser.i === parser.string.length) {
      throw new TexError(
        'NoClosingDelim',
        "Can't find closing delimiter for %1",
        parser.currentCS
      );
    }
    const text = parser.string.slice(start, parser.i).replace(/ /g, '\u00A0');
    parser.i++;
    parser.Push(
      parser.create(
        'token',
        'mtext',
        { mathvariant: TexConstant.Variant.MONOSPACE },
        text
      )
    );
  },
};

new CommandMap('verb', { verb: VerbMethods.Verb });

export const VerbConfiguration = Configuration.create('verb', {
  [ConfigurationType.HANDLER]: { [HandlerType.MACRO]: ['verb'] },
});
