using FlowerShopDataModels.Models;
using FlowerShopContracts.BindingModels;
using FlowerShopContracts.ViewModels;
using System.ComponentModel.DataAnnotations.Schema;
using System.ComponentModel.DataAnnotations;
using FlowerShopDatabaseImplement;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FlowerShopDatabaseImplement.Models
{
    public class Flower : IFlowerModel
    {
        public int Id { get; set; }
        [Required]
        public string FlowerName { get; set; } = string.Empty;
        [Required]
        public double Price { get; set; }
        private Dictionary<int, (IComponentModel, int)>? _flowerComponents = null;
        [NotMapped]
        public Dictionary<int, (IComponentModel, int)> FlowerComponents
        {
            get
            {
                if (_flowerComponents == null)
                {
                    _flowerComponents = Components
                    .ToDictionary(recPC => recPC.ComponentId, recPC =>
                   (recPC.Component as IComponentModel, recPC.Count));
                }
                return _flowerComponents;
            }
        }
        [ForeignKey("FlowerId")]
        public virtual List<FlowerComponent> Components { get; set; } = new();
        [ForeignKey("FlowerId")]
        public virtual List<Order> Orders { get; set; } = new();
        public static Flower Create(FlowerShopDataBase context, FlowerBindingModel model)
        {
            return new Flower()
            {
                Id = model.Id,
                FlowerName = model.FlowerName,
                Price = model.Price,
                Components = model.FlowerComponents.Select(x => new FlowerComponent
                {
                    Component = context.Components.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList()
            };
        }
        public void Update(FlowerBindingModel model)
        {
            FlowerName = model.FlowerName;
            Price = model.Price;
        }
        public FlowerViewModel GetViewModel => new()
        {
            Id = Id,
            FlowerName = FlowerName,
            Price = Price,
            FlowerComponents = FlowerComponents
        };
        public void UpdateComponents(FlowerShopDataBase context, FlowerBindingModel model)
        {
            var flowerComponents = context.FlowerComponents.Where(rec =>rec.FlowerId == model.Id).ToList();
            if (flowerComponents != null && FlowerComponents.Count > 0)
            {
                context.FlowerComponents.RemoveRange(flowerComponents.Where(rec => !model.FlowerComponents.ContainsKey(rec.ComponentId)));
                context.SaveChanges();
                foreach (var updateComponent in flowerComponents)
                {
                    updateComponent.Count =
                    model.FlowerComponents[updateComponent.ComponentId].Item2;
                    model.FlowerComponents.Remove(updateComponent.ComponentId);
                }
                context.SaveChanges();
            }
            var flower = context.Flowers.First(x => x.Id == Id);
            foreach (var pc in model.FlowerComponents)
            {
                context.FlowerComponents.Add(new FlowerComponent
                {
                    Flower = flower,
                    Component = context.Components.First(x => x.Id == pc.Key),
                    Count = pc.Value.Item2
                });
                context.SaveChanges();
            }
            _flowerComponents = null;
        }
    }
}