import 'package:comunic/enums/likes_type.dart';
import 'package:comunic/enums/post_kind.dart';
import 'package:comunic/enums/post_visibility_level.dart';
import 'package:comunic/enums/user_access_levels.dart';
import 'package:comunic/lists/comments_list.dart';
import 'package:comunic/models/displayed_content.dart';
import 'package:comunic/models/like_element.dart';
import 'package:comunic/models/survey.dart';
import 'package:meta/meta.dart';

/// Single post information
///
/// @author Pierre HUBERT

class Post implements LikeElement {
  final int id;
  final int userID;
  final int userPageID;
  final int groupID;
  final int timeSent;
  DisplayedString content;
  PostVisibilityLevel visibilityLevel;
  final PostKind kind;
  final int fileSize;
  final String fileType;
  final String filePath;
  final String fileURL;
  final int timeEnd;
  final String linkURL;
  final String linkTitle;
  final String linkDescription;
  final String linkImage;
  int likes;
  bool userLike;
  final UserAccessLevels access;
  final CommentsList comments;
  Survey survey;

  Post(
      {@required this.id,
      @required this.userID,
      @required this.userPageID,
      @required this.groupID,
      @required this.timeSent,
      @required this.content,
      @required this.visibilityLevel,
      @required this.kind,
      @required this.fileSize,
      @required this.fileType,
      @required this.filePath,
      @required this.fileURL,
      @required this.timeEnd,
      @required this.linkURL,
      @required this.linkTitle,
      @required this.linkDescription,
      @required this.linkImage,
      @required this.likes,
      @required this.userLike,
      @required this.access,
      @required this.comments,
      @required this.survey})
      : assert(id != null),
        assert(userID != null),
        assert(userPageID != 0 || groupID != 0),
        assert(timeSent != null),
        assert(kind != PostKind.TEXT || content != null),
        assert(visibilityLevel != null),
        assert(kind != null),
        assert(kind != PostKind.COUNTDOWN || timeEnd != null),
        assert(kind != PostKind.SURVEY || survey != null),
        assert(likes != null),
        assert(userLike != null),
        assert(access != null);

  bool get isGroupPost => groupID != null && groupID > 0;

  bool get hasContent => content != null && !content.isNull;

  bool get hasComments => comments != null;

  bool get canUpdate => access == UserAccessLevels.FULL;

  bool get hasLinkImage => linkImage != null;

  bool get canDelete =>
      access == UserAccessLevels.FULL ||
      access == UserAccessLevels.INTERMEDIATE;

  @override
  LikesType get likeType => LikesType.POST;
}