using System;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using System.Text;

namespace Model
{

    public class Recipe : IEquatable<Recipe>
    {
        #region Attributes
        private static int idCreator = 0;
        private string? _title;
        private string? _description;
        #endregion

        #region Properties
        public int Id { get; init; }
        public string? Title
        {
            get => _title;
            set
            {
                if (string.IsNullOrWhiteSpace(value))
                    _title = "No title.";
                else
                    _title = value;
            }
        }
        public string? Description
        {
            get => _description;
            set
            {
                if (string.IsNullOrWhiteSpace(value))
                    _description = "No description.";
                else
                    _description = value;
            }
        }
        public List<PreparationStep>? PreparationSteps { get; private set; }
        #endregion

        #region Constructors
        public Recipe(string? title = null, string? description = null, int? id = null,
                      params PreparationStep[] preparationSteps)
        {
            if (id == null) Id = idCreator++;
            else Id = (int)id;
            Title = title;
            Description = description;
            PreparationSteps = new List<PreparationStep>(preparationSteps);
        }
        #endregion

        #region Methods
        public bool Equals(Recipe? other)
        {
            if (other == null) return false;
            if (other == this) return true;
            return Title.Equals(other.Title) && Description.Equals(other.Description);
        }

        public override int GetHashCode()
        {
            return Id.GetHashCode();
        }

        public override string ToString()
        {
            StringBuilder sb = new StringBuilder($"[Recipe] - {Title}: {Description}\n");
            foreach (PreparationStep ps in PreparationSteps)
            {
                sb.AppendFormat("\t* {0}\n", ps.ToString());
            }
            return sb.ToString();
        }
        #endregion
    }
}