import { AutolinkParser } from '../../inline';
import { State, Backtrack } from '../../context';
import { List, Node } from '../../../combinator/parser';
import { state, constraint, backtrack, surround, lazy } from '../../../combinator';
import { parse } from '../link';
import { str } from '../../source';
import { define } from 'typed-dom/dom';

// Timeline(pseudonym): user/tid
// Thread(anonymous): cid

// UTC
// tid: YYYY-MMDD-HHMM-SS
// cid: YYYY-MMDD-HHMM-SSmmm

// 内部表現はUnixTimeに統一する(時系列順)
// 外部表現は投稿ごとに投稿者の投稿時のタイムゾーンに統一する(非時系列順)

export const anchor: AutolinkParser.AnchorParser = lazy(() => constraint(State.autolink, state(State.autolink,
  backtrack(surround(
    /(?<![0-9a-z@#])>>/yi,
    str(/[0-9a-z]+(?:-[0-9a-z]+)*(?![_.-]?[0-9a-z@#]|>>|:\S)/yi),
    '',
    false,
    [3 | Backtrack.unescapable],
    ([, [{ value }]], input, output) =>
      output.append(
        new Node(define(parse(
          new List([new Node(`>>${value}`)]),
          new List([new Node(`?at=${value}`)]),
          input),
          { class: 'anchor' }))))))));