namespace EgwCoreLib.Lux.Data.Repository.Sales
{
    public class OfferRepository : BaseRepository, IOfferRepository
    {
        #region Public Constructors

        public OfferRepository(IDbContextFactory<DataLayerContext> ctxFactory) : base(ctxFactory)
        {
        }

        #endregion Public Constructors

        #region Public Methods

        /// <inheritdoc />
        public async Task<bool> AddAsync(OfferModel entity)
        {
            await using var dbCtx = await CreateContextAsync();
            await dbCtx.DbSetOffer.AddAsync(entity);
            return await dbCtx.SaveChangesAsync() > 0;
        }

        /// <inheritdoc />
        public async Task<bool> CheckExpiredAsync()
        {
            await using var dbCtx = await CreateContextAsync();
            DateTime adesso = DateTime.Now;
            // recupero offerta...
            var listExpired = await dbCtx
                                    .DbSetOffer
                                    .Where(x => x.ValidUntil < adesso && x.OffertState == OfferStates.Open)
                                    .ToListAsync();

            // se trovo le aggiorno come stato
            if (listExpired != null)
            {
                foreach (var item in listExpired)
                {
                    item.OffertState = OfferStates.Expired;
                    dbCtx.Entry(item).State = EntityState.Modified;
                }

                // salvo TUTTI i cambiamenti...
                return await dbCtx.SaveChangesAsync() > 0;
            }
            else
            {
                return false;
            }
        }

        /// <inheritdoc />
        public async Task<bool> CloneAsync(OfferModel rec2clone)
        {
            await using var dbCtx = await CreateContextAsync();

            // Wrap in transaction for atomicity (parent + children clone)
            await using var tx = await dbCtx.Database.BeginTransactionAsync();
            try
            {
                DateTime now = DateTime.Now;

                var currRec = await dbCtx.DbSetOffer
                                        .Include(x => x.OfferRowNav)
                                        .FirstOrDefaultAsync(x => x.OfferID == rec2clone.OfferID);

                if (currRec == null)
                    return false;

                DateTime adesso = DateTime.Now;
                var lastRec = dbCtx
                            .DbSetOffer
                            .Where(x => x.RefYear == adesso.Year)
                            .OrderByDescending(x => x.RefNum)
                            .FirstOrDefault();
                int newRefNum = lastRec != null ? lastRec.RefNum + 1 : 1;

                // 2. Creo il nuovo parent
                var newRec = new OfferModel()
                {
                    ConsNote = rec2clone.ConsNote,
                    CustomerID = rec2clone.CustomerID,
                    DealerID = rec2clone.DealerID,
                    Description = rec2clone.Description,
                    DictPresel = rec2clone.DictPresel,
                    Discount = rec2clone.Discount,
                    DueDateProm = rec2clone.DueDateProm,
                    DueDateReq = rec2clone.DueDateReq,
                    Envir = rec2clone.Envir,
                    Inserted = adesso,
                    Modified = adesso,
                    OffertState = OfferStates.Open,
                    RefNum = newRefNum,
                    RefRev = 1,
                    RefYear = adesso.Year,
                    ValidUntil = currRec.ValidUntil
                };

                // 3. Clono i child
                // sistemo child...
                newRec.OfferRowNav = currRec.OfferRowNav
                    .Select(c => new OfferRowModel()
                    {
                        AwaitBom = c.AwaitBom,
                        AwaitPrice = c.AwaitPrice,
                        BomCost = c.BomCost,
                        BomOk = c.BomOk,
                        BomPrice = c.BomPrice,
                        Envir = c.Envir,
                        FileName = c.FileName,
                        FileResource = c.FileResource,
                        FileSize = c.FileSize,
                        Inserted = adesso,
                        ItemBOM = c.ItemBOM,
                        ItemJCD = c.ItemJCD,
                        ItemOk = c.ItemOk,
                        ItemSteps = c.ItemSteps,
                        ItemTags = c.ItemTags,
                        JobID = c.JobID,
                        Modified = c.Modified,
                        Note = c.Note,
                        ProdItemQty = c.ProdItemQty,
                        Qty = c.Qty,
                        RowNum = c.RowNum,
                        SellingItemID = c.SellingItemID,
                        SerStruct = c.SerStruct,
                        StepCost = c.StepCost,
                        StepFlowTime = c.StepFlowTime,
                        StepLeadTime = c.StepLeadTime,
                        StepPrice = c.StepPrice,
                        //OrderID = dbRec.OrderID,
                        OfferRowUID = c.OfferRowDtx
                    })
                    .ToList();

                // 4. Aggiungo il nuovo parent (EF aggiunge anche i child)
                dbCtx.DbSetOffer.Add(newRec);

                // 5. Salvo tutto in transazione
                await dbCtx.SaveChangesAsync();
                await tx.CommitAsync();
                return true;
            }
            catch
            {
                await tx.RollbackAsync();
                throw;
            }
        }

        /// <inheritdoc />
        public async Task<bool> DeleteAsync(OfferModel entity)
        {
            await using var dbCtx = await CreateContextAsync();
            dbCtx.DbSetOffer.Remove(entity);
            return await dbCtx.SaveChangesAsync() > 0;
        }

        /// <inheritdoc />
        public async Task<List<OfferModel>> GetAllAsync()
        {
            await using var dbCtx = await CreateContextAsync();
            return await dbCtx.DbSetOffer
                            .Include(c => c.CustomerNav)
                            .Include(d => d.DealerNav)
                            .Include(o => o.OfferRowNav)
                            .AsNoTracking()
                            .ToListAsync();
        }

        /// <inheritdoc />
        public async Task<List<ItemModel>> GetBomItemsAsync()
        {
            await using var dbCtx = await CreateContextAsync();
            return await dbCtx.DbSetItem
                .Where(x => x.ItemType == ItemClassType.Bom || x.ItemType == ItemClassType.BomAlt)
                .ToListAsync();
        }

        /// <inheritdoc />
        public async Task<OfferModel?> GetByIdAsync(int recId)
        {
            await using var dbCtx = await CreateContextAsync();
            return await dbCtx
                            .DbSetOffer
                            .Where(x => x.OfferID == recId)
                            .Include(c => c.CustomerNav)
                            .Include(d => d.DealerNav)
                            .Include(o => o.OfferRowNav)
                            .ThenInclude(s => s.SellingItemNav)
                            .FirstOrDefaultAsync();
        }

        /// <inheritdoc />
        public async Task<List<OfferModel>> GetFiltAsync(DateTime inizio, DateTime fine)
        {
            await using var dbCtx = await CreateContextAsync();
            return await dbCtx.DbSetOffer
                            .Where(x => x.Inserted >= inizio && x.Inserted <= fine)
                            .Include(c => c.CustomerNav)
                            .Include(d => d.DealerNav)
                            .Include(o => o.OfferRowNav)
                            .AsNoTracking()
                            .ToListAsync();
        }

        /// <inheritdoc />
        public async Task<List<ItemGroupModel>> GetItemGroupsAsync()
        {
            await using var dbCtx = await CreateContextAsync();
            return await dbCtx.DbSetItemGroup.ToListAsync();
        }

        /// <inheritdoc />
        public async Task<List<OfferRowModel>> GetRowsAsync(int recId)
        {
            await using var dbCtx = await CreateContextAsync();
            return await dbCtx.DbSetOfferRow
                                .Where(x => x.OfferID == recId)
                                .ToListAsync();
        }

        /// <inheritdoc />
        public async Task<bool> SaveRowsAsync(List<OfferRowModel> rows)
        {
            // Add validation for null or empty list
            if (rows == null || rows.Count == 0) return false;

            await using var dbCtx = await CreateContextAsync();

            // Wrap in transaction for atomicity (batch update multiple rows)
            await using var tx = await dbCtx.Database.BeginTransactionAsync();
            try
            {
                foreach (var row in rows)
                    dbCtx.Entry(row).State = EntityState.Modified;

                bool done = await dbCtx.SaveChangesAsync() > 0;

                if (done)
                    await tx.CommitAsync();

                return done;
            }
            catch
            {
                await tx.RollbackAsync();
                throw;
            }
        }

        /// <inheritdoc />
        public async Task<bool> UpdateAsync(OfferModel entity)
        {
            await using var dbCtx = await CreateContextAsync();
            // Recuperiamo l'entità tracciata dal context
            var trackedEntity = await dbCtx.DbSetOffer.FirstOrDefaultAsync(x => x.OfferID == entity.OfferID);

            if (trackedEntity != null)
            {
                // verifico eventuale riapertura SE fosse expired ma la data è valida...
                if (trackedEntity.OffertState == OfferStates.Expired && entity.ValidUntil > DateTime.Today)
                {
                    entity.OffertState = OfferStates.Open;
                }
                // Aggiorna i valori dell'entità tracciata con quelli della nuova
                dbCtx.Entry(trackedEntity).CurrentValues.SetValues(entity);
            }
            else
            {
                dbCtx.DbSetOffer.Update(entity);
            }
            return await dbCtx.SaveChangesAsync() > 0;
        }


        #endregion Public Methods
    }
}