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

        public OrderViewModel? Update(OrderBindingModel model)
        {
            using var context = new PlumbingRepairDatabase();
            var order = context.Orders.Include(x => x.Work).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;
                    return model;
                }
            }
            foreach (var implementer in context.Implementers)
            {
                if (implementer.Id == model.ImplementerId)
                {
                    model.ImplementerFIO = implementer.ImplementerFIO;
                    return model;
                }
            }
            return model;
        }
    }
}