using System;

namespace DataLayer;

/// <summary>Parameterless ctor and setters should be used by EF only. Everything else should treat it as immutable</summary>
public record Rating : IComparable<Rating>, IComparable
{
	public float OverallRating { get; private set; }
	public float PerformanceRating { get; private set; }
	public float StoryRating { get; private set; }

	private Rating() { }
	public Rating(float overallRating, float performanceRating, float storyRating)
	{
		OverallRating = overallRating;
		PerformanceRating = performanceRating;
		StoryRating = storyRating;
	}

	// EF magically tracks this owned object. by replacing it with a new() immutable object, stuff gets weird. update instead
	internal void Update(float overallRating, float performanceRating, float storyRating)
	{
		// don't overwrite with all 0
		if (overallRating + performanceRating + storyRating == 0)
			return;

		OverallRating = overallRating;
		PerformanceRating = performanceRating;
		StoryRating = storyRating;
	}

	public override string ToString() => $"Overall={OverallRating} Perf={PerformanceRating} Story={StoryRating}";

	public int CompareTo(Rating? other)
	{
		if (other is null) return 1;
		var compare = OverallRating.CompareTo(other.OverallRating);
		if (compare != 0) return compare;
		compare = PerformanceRating.CompareTo(other.PerformanceRating);
		if (compare != 0) return compare;
		return StoryRating.CompareTo(other.StoryRating);
	}
	public int CompareTo(object? obj) => obj is Rating second ? CompareTo(second) : 1;
}