using Core.Interfaces;
using Domain.Constants;
using Domain.Dtos.Sales;
using Domain.Entities;
using Models.Interfaces;

namespace Core.Services
{
    public class SalesDocumentService(IPhSSalesDocumentRepository salesDocumentRepository) : ISalesDocumentDom
    {
        private readonly IPhSSalesDocumentRepository _salesDocumentRepository = salesDocumentRepository;

        public async Task<SalesDocumentCreateResponse> CreateAsync(SalesDocumentCreateRequest request)
        {
            ArgumentNullException.ThrowIfNull(request);

            if (request.CustomerId <= 0)
                throw new ArgumentException("Debe seleccionar un cliente.", nameof(request.CustomerId));

            if (request.BillToCustomerId <= 0)
                throw new ArgumentException("Debe seleccionar un cliente de facturación.", nameof(request.BillToCustomerId));

            if (string.IsNullOrWhiteSpace(request.Currency))
                throw new ArgumentException("La moneda es obligatoria.", nameof(request.Currency));

            if (request.Details is null || request.Details.Count == 0)
                throw new InvalidOperationException("Debe incluir al menos un detail.");

            if (request.Coverage is null || request.Coverage.Count == 0)
                throw new InvalidOperationException("Debe incluir coverage.");

            foreach (var detail in request.Details)
                ValidateDetail(detail);

            var netAmount = request.Details.Sum(x => x.NetAmount);
            var taxAmount = request.Details.Sum(x => x.TaxAmount);
            var totalAmount = request.Details.Sum(x => x.TotalAmount);

            if (totalAmount <= 0)
                throw new InvalidOperationException("El total del documento debe ser mayor a cero.");

            var now = DateTime.Now;

            var entity = new ESalesDocument
            {
                FormseriesId = request.FormseriesId,
                DocumentType = request.DocumentType,
                FiscalVoucherType = request.FiscalVoucherType,
                FiscalVoucherLetter = request.FiscalVoucherLetter,
                Status = (int)SalesDocumentStatus.Draft,
                QuoteId = request.QuoteId,
                CustomerId = request.CustomerId,
                BillToCustomerId = request.BillToCustomerId,
                IssueDate = request.IssueDate ?? now,
                Currency = request.Currency.Trim(),
                ExchangeRate = request.ExchangeRate <= 0 ? 1 : request.ExchangeRate,
                NetAmount = netAmount,
                TaxAmount = taxAmount,
                TotalAmount = totalAmount,
                AssociatedDocumentType = request.AssociatedDocumentType,
                AssociatedDocumentNumber = request.AssociatedDocumentNumber,
                AssociatedDocumentDate = request.AssociatedDocumentDate,
                Observations = request.Observations,
                ExtraInfoJson = request.ExtraInfoJson,
                PeriodFrom = request.PeriodFrom,
                PeriodTo = request.PeriodTo,
                Createdat = now,
                PhSSalesDocumentDetails = request.Details.Select(x => new ESalesDocumentDetail
                {
                    LineNumber = x.LineNumber,
                    OriginType = x.OriginType.ToStorageCode(),
                    OriginId = ResolveOriginId(x),
                    QuoteDetailId = ResolveQuoteDetailId(x),
                    ProductId = x.ProductId,
                    Description = x.Description.Trim(),
                    Quantity = x.Quantity,
                    AuthorizedUnitPrice = x.AuthorizedUnitPrice,
                    AuthorizedAmount = x.AuthorizedAmount,
                    BilledPercentage = x.BilledPercentage,
                    UnitPrice = x.UnitPrice,
                    NetAmount = x.NetAmount,
                    TaxAmount = x.TaxAmount,
                    TotalAmount = x.TotalAmount,
                    OriginSnapshotJson = x.OriginSnapshotJson,
                    Createdat = now
                }).ToList(),
                PhSSalesDocumentCoverages = request.Coverage.Select(x => new ESalesDocumentCoverage
                {
                    QuoteId = x.QuoteId,
                    QuoteDetailId = x.QuoteDetailId,
                    CoverageType = x.CoverageType,
                    CoveragePercentage = x.CoveragePercentage,
                    CoverageAmount = x.CoverageAmount,
                    PeriodFrom = x.PeriodFrom,
                    PeriodTo = x.PeriodTo,
                    Notes = x.Notes,
                    Createdat = now
                }).ToList()
            };

            var created = await _salesDocumentRepository.CreateAsync(entity);

            return new SalesDocumentCreateResponse
            {
                Id = created.Id,
                InternalDocumentNumber = created.InternalDocumentNumber
            };
        }

        public Task<SalesDocumentDto?> GetDtoByIdAsync(int id)
        {
            if (id <= 0)
                throw new ArgumentOutOfRangeException(nameof(id));

            return _salesDocumentRepository.GetDtoByIdAsync(id);
        }
        private static void ValidateDetail(SalesDocumentCreateDetailRequest detail)
        {
            if (detail.LineNumber <= 0)
                throw new ArgumentException("El número de línea del detail debe ser mayor a cero.", nameof(detail.LineNumber));

            if (!Enum.IsDefined(typeof(SalesDocumentOriginType), detail.OriginType))
                throw new ArgumentException("El tipo de origen del detail no es válido.", nameof(detail.OriginType));

            if (string.IsNullOrWhiteSpace(detail.Description))
                throw new ArgumentException("La descripción del detail es obligatoria.", nameof(detail.Description));

            if (detail.Quantity <= 0)
                throw new ArgumentException("La cantidad del detail debe ser mayor a cero.", nameof(detail.Quantity));

            var hasOriginId = detail.OriginId.HasValue && detail.OriginId.Value > 0;
            var hasQuoteDetailId = detail.QuoteDetailId.HasValue && detail.QuoteDetailId.Value > 0;

            if (detail.OriginType != SalesDocumentOriginType.Manual && !hasOriginId && !hasQuoteDetailId)
                throw new ArgumentException("Debe informar OriginId o QuoteDetailId para trazabilidad del origen.", nameof(detail.OriginId));

            if (detail.OriginType == SalesDocumentOriginType.QuoteDetail && !hasQuoteDetailId && !hasOriginId)
                throw new ArgumentException("Debe informar QuoteDetailId u OriginId para líneas originadas en presupuesto.", nameof(detail.QuoteDetailId));
        }

        private static int? ResolveOriginId(SalesDocumentCreateDetailRequest detail)
        {
            if (detail.OriginId.HasValue && detail.OriginId.Value > 0)
                return detail.OriginId;

            return detail.OriginType == SalesDocumentOriginType.QuoteDetail
                ? detail.QuoteDetailId
                : null;
        }

        private static int? ResolveQuoteDetailId(SalesDocumentCreateDetailRequest detail)
        {
            if (detail.QuoteDetailId.HasValue && detail.QuoteDetailId.Value > 0)
                return detail.QuoteDetailId;

            return detail.OriginType == SalesDocumentOriginType.QuoteDetail
                ? detail.OriginId
                : null;
        }

    }
}