import { factorySpace } from '../../../../micromark-factory-space@1.1.0/node_modules/micromark-factory-space/index.mjs';
import { markdownLineEnding, markdownSpace } from '../../../../micromark-util-character@1.2.0/node_modules/micromark-util-character/index.mjs';

/**
 * @typedef {import('micromark-util-types').Code} Code
 * @typedef {import('micromark-util-types').Construct} Construct
 * @typedef {import('micromark-util-types').State} State
 * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext
 * @typedef {import('micromark-util-types').Tokenizer} Tokenizer
 */

/** @type {Construct} */
const thematicBreak = {
  name: 'thematicBreak',
  tokenize: tokenizeThematicBreak
};

/**
 * @this {TokenizeContext}
 * @type {Tokenizer}
 */
function tokenizeThematicBreak(effects, ok, nok) {
  let size = 0;
  /** @type {NonNullable<Code>} */
  let marker;
  return start

  /**
   * Start of thematic break.
   *
   * ```markdown
   * > | ***
   *     ^
   * ```
   *
   * @type {State}
   */
  function start(code) {
    effects.enter('thematicBreak');
    // To do: parse indent like `markdown-rs`.
    return before(code)
  }

  /**
   * After optional whitespace, at marker.
   *
   * ```markdown
   * > | ***
   *     ^
   * ```
   *
   * @type {State}
   */
  function before(code) {
    marker = code;
    return atBreak(code)
  }

  /**
   * After something, before something else.
   *
   * ```markdown
   * > | ***
   *     ^
   * ```
   *
   * @type {State}
   */
  function atBreak(code) {
    if (code === marker) {
      effects.enter('thematicBreakSequence');
      return sequence(code)
    }
    if (size >= 3 && (code === null || markdownLineEnding(code))) {
      effects.exit('thematicBreak');
      return ok(code)
    }
    return nok(code)
  }

  /**
   * In sequence.
   *
   * ```markdown
   * > | ***
   *     ^
   * ```
   *
   * @type {State}
   */
  function sequence(code) {
    if (code === marker) {
      effects.consume(code);
      size++;
      return sequence
    }
    effects.exit('thematicBreakSequence');
    return markdownSpace(code)
      ? factorySpace(effects, atBreak, 'whitespace')(code)
      : atBreak(code)
  }
}

export { thematicBreak };
//# sourceMappingURL=thematic-break.mjs.map
