/**
 * @typedef {import('micromark-util-types').Effects} Effects
 * @typedef {import('micromark-util-types').State} State
 */
import {factorySpace} from 'micromark-factory-space'
import {markdownLineEnding, markdownSpace} from 'micromark-util-character'

/**
 * @param {Effects} effects
 * @param {State} ok
 */
export function factoryWhitespace(effects, ok) {
  /** @type {boolean} */
  let seen
  return start
  /** @type {State} */

  function start(code) {
    if (markdownLineEnding(code)) {
      effects.enter('lineEnding')
      effects.consume(code)
      effects.exit('lineEnding')
      seen = true
      return start
    }

    if (markdownSpace(code)) {
      return factorySpace(
        effects,
        start,
        seen ? 'linePrefix' : 'lineSuffix'
      )(code)
    }

    return ok(code)
  }
}