// Originally from linkify https://github.com/Cretezy/linkify/blob/ba536fa85e7e3a16e580f153616f399458986183/lib/linkify.dart
// Removed options `removeWWW` and `humanize`
//
// MIT License
//
// Copyright (c) 2019 Charles-William Crete
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

import 'uri.dart';
export 'uri.dart' show UrlLinkifier, UrlElement;

abstract class LinkifyElement {
  final String text;

  LinkifyElement(this.text);

  @override
  bool operator ==(other) => equals(other);

  bool equals(other) => other is LinkifyElement && other.text == text;
}

class BoldElement extends LinkifyElement {
  BoldElement(String text) : super(text);
}

class ItalicElement extends LinkifyElement {
  ItalicElement(String text) : super(text);
}

class SuperElement extends LinkifyElement {
  SuperElement(String text) : super(text);
}

class SubElement extends LinkifyElement {
  SubElement(String text) : super(text);
}

class StrikeElement extends LinkifyElement {
  StrikeElement(String text) : super(text);
}

class CodeElement extends LinkifyElement {
  CodeElement(String text) : super(text);
}

class LinkableElement extends LinkifyElement {
  final String url;

  LinkableElement(String? text, this.url) : super(text ?? url);

  @override
  bool operator ==(other) => equals(other);

  @override
  bool equals(other) => other is LinkableElement && super.equals(other) && other.url == url;
}

/// Represents an element containing text
class TextElement extends LinkifyElement {
  TextElement(String text) : super(text);

  @override
  String toString() {
    return "TextElement: '$text'";
  }

  @override
  bool operator ==(other) => equals(other);

  @override
  bool equals(other) => other is TextElement && super.equals(other);
}

abstract class Linkifier {
  const Linkifier();

  List<LinkifyElement> parse(List<LinkifyElement> elements, LinkifyOptions options);
}

class LinkifyOptions {
  /// Enables loose URL parsing (any string with "." is a URL).
  final bool looseUrl;

  /// When used with [looseUrl], default to `https` instead of `http`.
  final bool defaultToHttps;

  /// Excludes `.` at end of URLs.
  final bool excludeLastPeriod;

  final bool messageFormatting;
  final bool parseLinks;

  const LinkifyOptions({this.looseUrl = false, this.defaultToHttps = false, this.excludeLastPeriod = true, this.messageFormatting = false, this.parseLinks = false});
}

const _urlLinkifier = UrlLinkifier();
const defaultLinkifiers = [_urlLinkifier];

/// Turns [text] into a list of [LinkifyElement]
///
/// Use [humanize] to remove http/https from the start of the URL shown.
/// Will default to `false` (if `null`)
///
/// Uses [linkTypes] to enable some types of links (URL, email).
/// Will default to all (if `null`).
List<LinkifyElement> linkify(
  String text, {
  LinkifyOptions options = const LinkifyOptions(),
  List<Linkifier> linkifiers = defaultLinkifiers,
}) {
  var list = <LinkifyElement>[TextElement(text)];

  if (text.isEmpty) {
    return [];
  }

  if (linkifiers.isEmpty) {
    return list;
  }

  linkifiers.forEach((linkifier) {
    list = linkifier.parse(list, options);
  });

  return list;
}