using System.ComponentModel.DataAnnotations;
using DigitalData.EmailProfiler.Domain.Common;
using DigitalData.EmailProfiler.Domain.Exceptions;

namespace DigitalData.EmailProfiler.Domain.ValueObjects;

/// <summary>
/// Value object representing an email address with validation
/// </summary>
public class EmailAddress : ValueObject
{
    public string Value { get; private set; }
    public string Domain { get; private set; }
    public string LocalPart { get; private set; }

    private EmailAddress(string value)
    {
        Value = value;
        var parts = value.Split('@');
        LocalPart = parts[0];
        Domain = parts[1];
    }

    public static EmailAddress Create(string email)
    {
        if (!IsValid(email))
            throw new DomainException($"Invalid email address: {email}");

        return new EmailAddress(email.ToLowerInvariant());
    }

    private static bool IsValid(string email)
    {
        return !string.IsNullOrWhiteSpace(email) &&
               email.Contains('@') &&
               new EmailAddressAttribute().IsValid(email);
    }

    protected override IEnumerable<object> GetEqualityComponents()
    {
        yield return Value;
    }

    public override string ToString() => Value;
}