using System.Collections.Generic;

namespace BaseGames.Core
{
    public enum ValidationSeverity { Error, Warning }

    /// <summary>
    /// 单条验证结果：严重级别 + 消息文本。
    /// 使用静态工厂方法 Error() / Warning() 创建。
    /// </summary>
    public readonly struct ValidationResult
    {
        public ValidationSeverity Severity { get; }
        public string             Message  { get; }

        public ValidationResult(ValidationSeverity severity, string message)
        {
            Severity = severity;
            Message  = message;
        }

        public static ValidationResult Error(string message)   => new(ValidationSeverity.Error,   message);
        public static ValidationResult Warning(string message) => new(ValidationSeverity.Warning, message);
    }

    /// <summary>
    /// 可验证 ScriptableObject 接口。实现此接口的 SO 会被 SOValidationRunner 自动扫描。
    /// Validate() 返回零条结果 = 数据合法；否则每条按 <see cref="ValidationResult.Severity"/> 分类报告。
    /// </summary>
    public interface IValidatable
    {
        IEnumerable<ValidationResult> Validate();
    }
}