using Nocr.Users.Api.Contracts.Users.Dto;
using Nocr.Users.AppServices.Users.Repositories;

namespace Nocr.Users.AppServices.Users.Services;

public sealed class UsersService : IUsersService
{
    private readonly IUsersRepository _repository;

    public UsersService(IUsersRepository repository)
    {
        _repository = repository ?? throw new ArgumentNullException(nameof(repository));
    }

    public async Task<long> Create(string username, string? telegramUsername, string? email, long? telegramId,
        CancellationToken cancellationToken = default)
    {
        var identities = new List<UserIdentity>();

        if (!string.IsNullOrWhiteSpace(email))
            identities.Add(UserIdentity.Email(email));
        
        if (!string.IsNullOrWhiteSpace(telegramUsername))
            identities.Add(UserIdentity.TelegramUsername(telegramUsername));
        
        if (telegramId.HasValue)
            identities.Add(UserIdentity.TelegramId(telegramId.Value.ToString()));
        
        // TODO: ToArray = грубо
        var user = User.Initialize(username, identities.ToArray());
        
        return await _repository.Create(user, cancellationToken);
    }

    public async Task<UserData?> GetById(long id, CancellationToken cancellationToken = default)
    {
        var user = await _repository.GetUserById(id, cancellationToken);
        if (user == null)
            return null;

        return new UserData
        {
            Id = user.Id,
            Username = user.Username,
        };
    }
}