using NodaTime;
using NodaTime.Extensions;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using CoreWiki.Utils;

namespace CoreWiki.Models;

public class Article
{
    public int Id { get; set; }
    [Required]
    public required string Slug { get; set; }
    [Required, MaxLength(100)]
    public string? Topic { get; set; }
    [NotMapped]
    public Instant Published { get; set; } = SystemClock.Instance.GetCurrentInstant();
    [Obsolete("This property is only for serialization")]
    [DataType(DataType.DateTime)]
    [Column("Published")]
    [Required]
    public DateTime PublishedDateTime
    {
        get => Published.ToDateTimeUtc();
        set => Published = DateTime.SpecifyKind(value, DateTimeKind.Utc).ToInstant();
    }
    [Required]
    public required int ViewCount { get; set; }
    [DataType(DataType.MultilineText)]
    [Required]
    public string? Content { get; set; }

    [NotMapped]
    public int? EstimatedReadingTime
    {
        get
        {
            if (Content == null)
            {
                return null;
            }
            var wpm = 275.00m;
            var wordCount = Content.Split(" ").Length;
            return (int)Math.Ceiling(wordCount / wpm);
        }
    }

    public ICollection<Comment> Comments { get; } = new List<Comment>();
}