using Microsoft.EntityFrameworkCore;
using PlumbingRepairContracts.BindingModels;
using PlumbingRepairContracts.SearchModels;
using PlumbingRepairContracts.StoragesContracts;
using PlumbingRepairContracts.ViewModels;
using PlumbingRepairDatabaseImplement.Models;

namespace PlumbingRepairDatabaseImplement.Implements
{
    public class OrderStorage : IOrderStorage
    {
        public OrderViewModel? Delete(OrderBindingModel model)
        {
            using var context = new PlumbingRepairDatabase();
            var element = context.Orders.Include(x => x.Work).Include(x => x.Client).Include(x => x.Implementer).FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Orders.Remove(element);
                context.SaveChanges();
                return AttachNames(element.GetViewModel);
            }
            return null;
        }

        public OrderViewModel? GetElement(OrderSearchModel model)
        {
			if (!model.Id.HasValue)
			{
				return null;
			}
			using var context = new PlumbingRepairDatabase();
			if (model.Id.HasValue)
				return AttachNames(context.Orders
				 .Include(x => x.Work)
					.Include(x => x.Implementer)
					.Include(x => x.Client)
				.FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id)
				?.GetViewModel);
			else if (model.ImplementerId.HasValue && model.Status.HasValue)
				return AttachNames(context.Orders
				 .Include(x => x.Implementer)
				  .Include(x => x.Work)
					.Include(x => x.Client)
				.FirstOrDefault(x => model.ImplementerId.HasValue && x.ImplementerId == model.ImplementerId)
				?.GetViewModel);
			return null;
		}

		public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
        {
            using var context = new PlumbingRepairDatabase();

			if (!model.Id.HasValue && !model.DateFrom.HasValue && !model.ClientId.HasValue && !model.Status.HasValue)
			{
				return new();
			}


			if (model.Id.HasValue)
			{
				return context.Orders
					.Include(x => x.Work)
					.Include(x => x.Implementer)
					.Include(x => x.Client)
				   .Where(x => x.Id == model.Id)
				   .Select(x => AttachNames(x.GetViewModel)).ToList();
			}
			if (model.Status.HasValue)
			{
				return context.Orders
					 .Include(x => x.Work)
					.Include(x => x.Implementer)
					.Include(x => x.Client)
				   .Where(x => x.ImplementerId == model.ImplementerId && x.Status == model.Status)
				   .Select(x => AttachNames(x.GetViewModel)).ToList();
			}
			if (model.ClientId.HasValue)
			{
				return context.Orders
					.Include(x => x.Client)
					.Include(x => x.Work)
					.Include(x => x.Implementer)
					.Where(x => x.ClientId == model.ClientId)
					.Select(x => AttachNames(x.GetViewModel)).ToList();
			}
			if (model.ImplementerId.HasValue)
			{
				return context.Orders
					 .Include(x => x.Work)
					.Include(x => x.Implementer)
					.Include(x => x.Client)
					 .Where(x => x.ImplementerId == model.ImplementerId)
					.Select(x => AttachNames(x.GetViewModel)).ToList();
			}
			if (model.DateFrom != null && model.DateTo != null)
			{
				return context.Orders
					.Include(x => x.Work)
					.Include(x => x.Client)
					.Include(x => x.Implementer)
					.Where(x => (x.DateCreate >= model.DateFrom && x.DateCreate <= model.DateTo)
					&& (!model.ClientId.HasValue || x.ClientId == model.ClientId))
					.Select(x => x.GetViewModel)
					.ToList();

			}
			return new();



		}

        public List<OrderViewModel> GetFullList()
        {
            using var context = new PlumbingRepairDatabase();
            return context.Orders
                    .Include(x => x.Work)
                    .Include(x => x.Implementer)
                    .Include(x => x.Client)
                    .Select(x =>AttachNames(x.GetViewModel))
                    .ToList();
        }

        public OrderViewModel? Insert(OrderBindingModel model)
        {
            var newOrder = Order.Create(model);
            if (newOrder == null)
            {
                return null;
            }
            using var context = new PlumbingRepairDatabase();
            
            context.Orders.Add(newOrder);
            context.SaveChanges();
            return AttachNames(context.Orders.Include(x => x.Work).Include(x => x.Implementer).Include(x => x.Client).FirstOrDefault(x => x.Id == newOrder.Id)?.GetViewModel);
        }

        public OrderViewModel? Update(OrderBindingModel model)
        {
            using var context = new PlumbingRepairDatabase();
            var order = context.Orders.Include(x => x.Work).Include(x => x.Implementer).Include(x => x.Client).FirstOrDefault(x => x.Id == model.Id);
            if (order == null)
            {
                return null;
            }
            order.Update(model);
            context.SaveChanges();
            return AttachNames(order.GetViewModel);
        }
        public static OrderViewModel? AttachNames(OrderViewModel? model)
        {
            if (model == null)
            {
                return null;
            }
            using var context = new PlumbingRepairDatabase();
            foreach (var work in context.Works) 
            {
                if(work.Id == model.WorkId)
                {
                    model.WorkName = work.WorkName;
                    break;
                }
            }
            foreach ( var client in context.Clients)
            {
                if (client.Id == model.ClientId)
                {
                    model.ClientFIO = client.ClientFIO;
                    model.ClientEmail = client.Email;
                    return model;
                }
            }
            foreach (var implementer in context.Implementers)
            {
                if (implementer.Id == model.ImplementerId)
                {
                    model.ImplementerFIO = implementer.ImplementerFIO;
                    return model;
                }
            }
            return model;
        }
    }
}