using System;
using System.Collections.Generic;

namespace MCTGLib
{
    /// <summary>
    /// A Recipe is a description of step and maybe some techniques, with an ingredient list to make a meal.<br/>
    /// It is instantiated with a new unique id, where the first number is 1.
    /// </summary>
    public class Recipe : BaseItem
    {
        #region Private Attributes

        private const int CAT_ITEM = 1;
        private static uint _idCreator = 0; // stand for the creation of a new id. It is incremented each time a new Recipe is instantiated.
        private string title = "";

        #endregion

        #region Public Properties

        /// <summary>
        /// The title of the recipe.
        /// </summary>
        public string Title
        {
            get => title;
            set
            {
                title = value;
                if (string.IsNullOrEmpty(title)) title = $"Recipe n{this.Id}";
            }
        }

        /// <summary>
        /// All the details about the preparation of the meal.
        /// </summary>
        public string Preparation { get; set; }

        #endregion

        #region Constructors

        public Recipe(string title="", string preparation="")
            : base(ComputeId(), "A recipe.")
        {
            Title = title;
            Preparation = preparation;
        }

        #endregion

        #region Private Methods

        /// <summary>
        /// Processi the unique identificator of an Item. The identificator is calculated to put the number representing
        /// the type of item before the number of its number in its type.
        /// </summary>
        private static uint ComputeId()
        {
            uint dec = 1;
            while ((_idCreator / (Math.Pow(10, dec)) >= 1)) dec++;

            uint id = (CAT_ITEM * (uint)(Math.Pow(10, dec))) + _idCreator++;
            Console.WriteLine("[recipe] new computed id: {0}", id);

            return id;
        }

        #endregion

        #region Public Methods

        public override string ToString()
        {
            return
                $"[ Class -Recipe- ]\n\n" +
                $"\t.Id  -  {Id}\n" +
                $"\t.Description  -  {Description}\n" +
                $"______\n\n";
        }

        #endregion
    }
}