using PolyclinicContracts.BindingModels;
using PolyclinicContracts.ViewModels;
using PolyclinicDataModels.Models;
using SecuritySystemDatabaseImplement;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace PolyclinicDatabaseImplement.Models
{
    public class Procedure : IProcedureModel
    {
        public int Id { get; set; }

        [Required]
        public int UserId { get; set; }

        [Required]
        public string Name {  get; set; } = string.Empty;

        [Required]
        public string Comment { get; set; } = string.Empty;

        private Dictionary<int, IRecipeModel>? _procedureRecipes = null;

        [ForeignKey("ProcedureId")]
        public virtual List<ProcedureRecipe> Recipes { get; set; } = new();

        [NotMapped]
        public Dictionary<int, IRecipeModel> ProcedureRecipes
        {
            get
            {
                if(_procedureRecipes == null)
                {
                    _procedureRecipes = Recipes.ToDictionary(recPC => recPC.RecipeId, recPC => (recPC.Recipe as IRecipeModel));
                }
                return _procedureRecipes;
            }
        }

        public static Procedure Create(PolyclinicDatabase database, ProcedureBindingModel bindingModel)
        {
            return new Procedure()
            {
                Id = bindingModel.Id,
                UserId = bindingModel.UserId,
                Name = bindingModel.Name,
                Comment = bindingModel.Comment,
                Recipes = bindingModel.ProcedureRecipes.Select(x => new ProcedureRecipe
                {
                    Recipe = database.Recipes.First(y => y.Id == x.Key)
                }).ToList()
            };
        }

        public void Update(ProcedureBindingModel bindingModel)
        {
            Name = bindingModel.Name;
            Comment = bindingModel.Comment;
        }

        public ProcedureViewModel GetViewModel => new()
        {
            Id = Id,
            Name = Name,
            UserId = UserId,
            Comment = Comment,
        };

        public void UpdateRecipes(PolyclinicDatabase database, ProcedureBindingModel bindingModel)
        {
            var ProcedureRecipes = database.ProcedureRecipes.Where(x => x.ProcedureId == bindingModel.Id).ToList();

            if(ProcedureRecipes != null)
            {
                // удалили те, которых нет в модели
                database.ProcedureRecipes.RemoveRange(ProcedureRecipes.Where(rec => !bindingModel.ProcedureRecipes.ContainsKey(rec.RecipeId)));
                database.SaveChanges();
            }
            var Procedure = database.Procedures.First(x => x.Id == bindingModel.Id);
            foreach (var pc in bindingModel.ProcedureRecipes)
            {
                database.ProcedureRecipes.Add(new ProcedureRecipe
                {
                    Procedure = Procedure,
                    Recipe = database.Recipes.First(x => x.Id == pc.Key)
                });
            }
            _procedureRecipes = null;
        }
    }
}