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 Recipe : IRecipeModel
    {
        public int Id { get; set; }

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

        public string Comment { get; set; } = string.Empty;
        public int? CourseId { get; set; }
        public virtual Course Course { get; set; } = new();

        private Dictionary<int, IProcedureModel>? _recipeProcedures = null;

        [ForeignKey("RecipeId")]
        public virtual List<RecipeProcedure> Procedures { get; set; } = new();

        [NotMapped]
        public Dictionary<int, IProcedureModel> RecipeProcedures
        {
            get
            {
                if (_recipeProcedures == null)
                {
                    _recipeProcedures = Procedures.ToDictionary(recPC => recPC.ProcedureId, recPC => (recPC.Procedure as IProcedureModel));
                }
                return _recipeProcedures;
            }
        }

        public static Recipe Create(PolyclinicDatabase database, RecipeBindingModel bindingModel)
        {
            return new Recipe()
            {
                Id = bindingModel.Id,
                ProceduresCount = bindingModel.ProceduresCount,
                Comment = bindingModel.Comment,
                CourseId = bindingModel.CourseId,
                Procedures = bindingModel.RecipeProcedures.Select(x => new RecipeProcedure
                {
                    Recipe = database.Recipes.First(y => y.Id == x.Key)
                }).ToList()
            };
        }

        public void Update(RecipeBindingModel bindingModel)
        {
            ProceduresCount = bindingModel.ProceduresCount;
            Comment = bindingModel.Comment;
            CourseId = bindingModel.CourseId;
        }

        public RecipeViewModel GetViewModel => new()
        {
            Id = Id,
            ProceduresCount = ProceduresCount,
            Comment = Comment,
            CourseId = Course?.Id ?? null,
        };

        public void UpdateProcedures(PolyclinicDatabase database, RecipeBindingModel bindingModel)
        {
            var RecipeProcedures = database.RecipeProcedures.Where(x => x.ProcedureId == bindingModel.Id).ToList();

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