using PlumbingRepairContracts.BindingModels;
using PlumbingRepairContracts.ViewModels;
using PlumbingRepairDataModels.Models;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations.Schema;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PlumbingRepairDataBaseImplement.Models
{
    public class Store : IStoreModel
    {
        [Required]
        public string StoreName { get; private set; } = string.Empty;
        [Required]
        public string StoreAdress { get; private set; } = string.Empty;
        [Required]
        public DateTime OpeningDate { get; private set; }
        [Required]
        public int WorkMaxCount { get; private set; }

        public int Id { get; private set; }


        private Dictionary<int, (IWorkModel, int)> _storeWorks = null;
        [NotMapped]
        public Dictionary<int, (IWorkModel, int)> StoreWorks
        {
            get
            {
                if (_storeWorks == null)
                {
                    _storeWorks = Works
                            .ToDictionary(recPC => recPC.WorkId, recPC => (recPC.Work as IWorkModel, recPC.Count));
                }
                return _storeWorks;
            }
        }

        [ForeignKey("StoreId")]
        public virtual List<StoreWork> Works { get; set; } = new();

        public static Store Create(PlumbingRepairDataBase context, StoreBindingModel model)
        {
            return new Store()
            {
                Id = model.Id,
                StoreName = model.StoreName,
                StoreAdress = model.StoreAdress,
                OpeningDate = model.OpeningDate,
                WorkMaxCount = model.WorkMaxCount,
                Works = model.StoreWorks.Select(x => new StoreWork
                {
                    Work = context.Works.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList()
            };
        }

        public void Update(StoreBindingModel model)
        {
            StoreName = model.StoreName;
            StoreAdress = model.StoreAdress;
            OpeningDate = model.OpeningDate;
            WorkMaxCount = model.WorkMaxCount;
        }

        public StoreViewModel GetViewModel => new()
        {
            Id = Id,
            StoreName = StoreName,
            StoreAdress = StoreAdress,
            OpeningDate = OpeningDate,
            WorkMaxCount = WorkMaxCount,
            StoreWorks = StoreWorks
        };

        public void UpdateWorks(PlumbingRepairDataBase context, StoreBindingModel model)
        {
            var storeWorks = context.StoreWorks.Where(rec => rec.StoreId == model.Id).ToList();
            if (storeWorks != null && storeWorks.Count > 0)
            {   // удалили те, которых нет в модели
                context.StoreWorks.RemoveRange(storeWorks.Where(rec => !model.StoreWorks.ContainsKey(rec.WorkId)));
                context.SaveChanges();
                // обновили количество у существующих записей
                foreach (var updateWork in storeWorks)
                {
                    updateWork.Count = model.StoreWorks[updateWork.WorkId].Item2;
                    model.StoreWorks.Remove(updateWork.WorkId);
                }
                context.SaveChanges();
            }
            var store = context.Stores.First(x => x.Id == Id);
            foreach (var sw in model.StoreWorks)
            {
                context.StoreWorks.Add(new StoreWork
                {
                    Store = store,
                    Work = context.Works.First(x => x.Id == sw.Key),
                    Count = sw.Value.Item2
                });
                context.SaveChanges();
            }
            _storeWorks = null;
        }
    }
}