using System;
using System.Collections.Generic;

namespace HN.Domain
{
  public sealed class Comment
  {
    public Guid Id { get; private set; }
    public Guid LinkId { get; private set; }
    public string Content { get; private set; }
    public DateTime CreatedAt { get; private set; }
    private List<Vote> _votes;
    public IReadOnlyList<Vote> Votes => _votes;

    internal Comment(Guid linkId, string content)
    {
      Id = Guid.NewGuid();
      LinkId = linkId;
      Content = content;
      CreatedAt = DateTime.UtcNow;
      _votes = new List<Vote>();
    }

    public void Upvote()
    {
      _votes.Add(new Vote(VoteType.Up));
    }

    public void Downvote()
    {
      _votes.Add(new Vote(VoteType.Down));
    }
  }
}