using System.Text.RegularExpressions;

namespace IdentityService.Domain.ValueObjects
{
    public class Email
    {
        public string Value { get; }
        public Email(string value)
        {
            if (string.IsNullOrWhiteSpace(value))
            {
                throw new ArgumentNullException("邮箱地址不可为空");
            }

            string pattern = "^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}$";
            if (!Regex.IsMatch(value, pattern))
            {
                throw new ArgumentException("邮箱地址格式不符合要求");
            }
            this.Value = value.ToLowerInvariant();
        }
        public override string ToString()
        {
            return Value;
        }

        public static implicit operator Email(string value)
        {
            return new Email(value);
        }
    }
}