using System.ComponentModel.DataAnnotations;

namespace Domain.Entities.Store;

/// <summary>게임 장르 코드 (관리형). 게임과 N:M (GameGenreMap).</summary>
public class GameGenre
{
    [Key]
    public int ID { get; private set; }

    public string KorName { get; private set; } = default!;

    public string? EngName { get; private set; }

    public int Order { get; private set; }

    public bool IsActive { get; private set; } = true;

    public DateTime CreatedAt { get; private set; } = DateTime.UtcNow;

    public DateTime? UpdatedAt { get; private set; }

    public virtual List<GameGenreMap> GameGenreMap { get; private set; } = [];

    private GameGenre() { }

    public static GameGenre Create(string korName, string? engName = null, int order = 0, bool isActive = true)
    {
        Validate(korName, engName);

        return new GameGenre
        {
            KorName = korName.Trim(),
            EngName = string.IsNullOrWhiteSpace(engName) ? null : engName.Trim(),
            Order = order,
            IsActive = isActive
        };
    }

    public void Update(string korName, string? engName, int order, bool isActive)
    {
        Validate(korName, engName);

        KorName = korName.Trim();
        EngName = string.IsNullOrWhiteSpace(engName) ? null : engName.Trim();
        Order = order;
        IsActive = isActive;
        UpdatedAt = DateTime.UtcNow;
    }

    private static void Validate(string korName, string? engName)
    {
        if (string.IsNullOrWhiteSpace(korName))
        {
            throw new ArgumentException("KorName is required.", nameof(korName));
        }

        if (korName.Length > 100)
        {
            throw new ArgumentOutOfRangeException(nameof(korName), "KorName 은 100자 이하로 입력하세요.");
        }

        if (engName is not null && engName.Length > 100)
        {
            throw new ArgumentOutOfRangeException(nameof(engName), "EngName 은 100자 이하로 입력하세요.");
        }
    }
}