using System.Reflection.Metadata.Ecma335;

namespace Validation.Core
{
    /// <summary>
    /// 校验结果
    /// </summary>
    public class ValidationResult
    {
        /// <summary>
        /// 是否合法
        /// </summary>
        public bool IsValid { get; set; } = true;

        /// <summary>
        /// 错误
        /// </summary>
        public List<ValidationMessage> Errors { get; set; } = new List<ValidationMessage>();

        /// <summary>
        /// 警告
        /// </summary>
        public List<ValidationMessage> Warnings { get; set; } = new List<ValidationMessage>();

        /// <summary>
        /// 添加错误信息
        /// </summary>
        /// <param name="error">错误信息</param>
        public void AddError(int row, string error)
        {
            Errors.Add(new ValidationMessage(row, error));
            IsValid = false;
        }

        /// <summary>
        /// 添加警告信息
        /// </summary>
        /// <param name="warning">警告信息</param>
        public void AddWarning(int row, string warning)
        {
            Warnings.Add(new ValidationMessage(row, warning));
            IsValid = false;
        }

        /// <summary>
        /// 返回验证结果的字符串表示
        /// </summary>
        /// <returns>包含验证结果详细信息的字符串</returns>
        public override string ToString()
        {
            var sb = new System.Text.StringBuilder();

            sb.AppendLine($"验证结果: {(IsValid ? "通过" : "失败")}");
            sb.AppendLine($"错误数量: {Errors.Count}");
            sb.AppendLine($"警告数量: {Warnings.Count}");

            AppendMessages(sb, "错误", Errors);
            AppendMessages(sb, "警告", Warnings);

            return sb.ToString();
        }

        private void AppendMessages(System.Text.StringBuilder sb, string messageType, List<ValidationMessage> messages)
        {
            if (messages.Count > 0)
            {
                sb.AppendLine($"{messageType}详情:");
                foreach (var message in messages)
                {
                    sb.AppendLine($"  第{message.RowIndex}行: {message.Message}");
                }
            }
        }
    }
}