using Core.Interfaces;
using Domain.Entities;
using Domain.Generics;
using Domain.SearchParams;
using Models.Interfaces;
using System.Reflection;
using Transversal.Services;

public class PatientService : IPatientDom
{
    #region Declaraciones y Constructor
    private readonly IPhSPatientRepository _repository;
    public PatientService(IPhSPatientRepository patientRepository)
    {
        _repository = patientRepository ?? throw new ArgumentNullException(nameof(patientRepository));
    }
    #endregion
    #region Métodos de servicio
    public async Task<PagedResult<EPatient>> GetAllAsync(int page = 1, int pageSize = 50)
    {
        try
        {
            return await _repository.GetAllAsync(page, pageSize);
        }
        catch (Exception ex)
        {
            var methodName = MethodBase.GetCurrentMethod()?.Name ?? "UnknownMethod";
            throw new Exception($"{methodName} Message: {ex.Message}", ex);
        }
    }
    public async Task<EPatient?> GetByIdAsync(int id)
    {
        try
        {
            return await _repository.GetByIdAsync(id);
        }
        catch (Exception ex)
        {
            var methodName = MethodBase.GetCurrentMethod()?.Name ?? "UnknownMethod";
            throw new Exception($"{methodName} Message: {ex.Message}", ex);
        }
    }
    public async Task<EPatient> CreateAsync(EPatient entity)
    {
        if (entity is null)
            throw new ArgumentNullException(nameof(entity), "El paciente no puede ser nulo.");

        if (string.IsNullOrWhiteSpace(entity.Firstname) || string.IsNullOrWhiteSpace(entity.Lastname))
            throw new ArgumentException("Debe completar el nombre y apellido del paciente.");

        if (string.IsNullOrWhiteSpace(entity.DocumentNumber))
            throw new ArgumentException("Debe completar el número de documento del paciente.");

        return await _repository.CreateAsync(entity);
    }
    public async Task<bool> UpdateAsync(EPatient entity)
    {
        if (entity is null)
            throw new ArgumentNullException(nameof(entity), "El paciente no puede ser nulo.");

        if (string.IsNullOrWhiteSpace(entity.Firstname) || string.IsNullOrWhiteSpace(entity.Lastname))
            throw new ArgumentException("Debe completar el nombre y apellido del paciente.");

        if (string.IsNullOrWhiteSpace(entity.DocumentNumber))
            throw new ArgumentException("Debe completar el número de documento del paciente.");

        return await _repository.UpdateAsync(entity);
    }
    public async Task<PagedResult<EPatient>> SearchAsync(string? name, string? document, int page = 1, int pageSize = 50)
    {
        try
        {
            return await _repository.SearchAsync(name, document, page, pageSize);
        }
        catch (Exception ex)
        {
            var methodName = MethodBase.GetCurrentMethod()?.Name ?? "UnknownMethod";
            throw new Exception($"{methodName} Message: {ex.Message}", ex);
        }
    }
    public Task<bool> DeleteAsync(int id)
    {
        // Implementar según políticas del sistema (soft delete, etc.)
        throw new NotImplementedException();
    }
    public async Task<byte[]> ExportFilteredPatientsToExcelAsync(PatientSearchParams searchParams)
    {
        try
        {
            var searchResult = await SearchAsync(
                searchParams.Name,
                searchParams.Document,
                searchParams.Page,
                searchParams.PageSize
            );

            if (searchResult?.Items is null || !searchResult.Items.Any())
            {
                throw new Exception("No se encontraron pacientes para exportar.");
            }

            var stream = new XLSXExportBase();

            var patientData = searchResult.Items.Select(p => new
            {
                p.Id,
                p.Firstname,
                p.Lastname,
                p.DocumentNumber,
                p.AffiliateNumber,
                p.Email,
                p.Phone,
                p.Birthdate,
                p.Gender
            }).ToList();

            var excelFile = stream.ExportExcel(patientData);
            return excelFile;
        }
        catch (Exception ex)
        {
            var methodName = MethodBase.GetCurrentMethod()?.Name ?? "UnknownMethod";
            throw new Exception($"{methodName} - Error al exportar pacientes: {ex.Message}", ex);
        }
    }
    #endregion
}