exports.exit = {
  taskListCheckValueChecked: exitCheck,
  taskListCheckValueUnchecked: exitCheck,
  paragraph: exitParagraphWithTaskListItem
}

function exitCheck(token) {
  // We’re always in a paragraph, in a list item.
  this.stack[this.stack.length - 2].checked =
    token.type === 'taskListCheckValueChecked'
}

function exitParagraphWithTaskListItem(token) {
  var parent = this.stack[this.stack.length - 2]
  var node = this.stack[this.stack.length - 1]
  var siblings = parent.children
  var head = node.children[0]
  var index = -1
  var firstParaghraph

  if (
    parent &&
    parent.type === 'listItem' &&
    typeof parent.checked === 'boolean' &&
    head &&
    head.type === 'text'
  ) {
    while (++index < siblings.length) {
      if (siblings[index].type === 'paragraph') {
        firstParaghraph = siblings[index]
        break
      }
    }

    if (firstParaghraph === node) {
      // Must start with a space or a tab.
      head.value = head.value.slice(1)

      if (head.value.length === 0) {
        node.children.shift()
      } else {
        head.position.start.column++
        head.position.start.offset++
        node.position.start = Object.assign({}, head.position.start)
      }
    }
  }

  this.exit(token)
}