using System;
using System.Collections.Generic;

namespace TINK.Model.Bike
{
    /// <summary> Count of wheels. </summary>
    public enum WheelType
    {
        Mono = 0,
        Two = 1,
        Trike = 2,
    }

    /// <summary> Type of bike. </summary>
    public enum TypeOfBike
    {
        Allround = 0,
        Cargo = 1,
        Citybike = 2,
    }

    public class Bike : IEquatable<Bike>
    {
        /// <summary>
        /// Constructs a bike.
        /// </summary>
        /// <param name="dateTimeProvider">Provider for current date time to calculate remainig time on demand for state of type reserved.</param>
        /// <param name="wheelType"></param>
        /// <param name="p_iId">Unique id of bike.</param>
        /// <param name="p_strCurrentStationName">Name of station where bike is located, null if bike is on the road.</param>
        public Bike(
            int p_iId,
            WheelType? wheelType = null,
            TypeOfBike? typeOfBike = null,
            string description = null)
        {            
            WheelType = wheelType;
            TypeOfBike = typeOfBike;
            Id = p_iId;
            Description = description;
        }

        /// <summary>
        /// Holds the unique id of the bike;
        /// </summary>
        public int Id { get; }

        /// <summary>
        /// Holds the count of wheels.
        /// </summary>
        public WheelType? WheelType { get; }

        /// <summary>
        /// Holds the type of bike.
        /// </summary>
        public TypeOfBike? TypeOfBike { get; }

        /// <summary> Holds the description of the bike. </summary>
        public string Description { get; }


        /// <summary> Compares two bike object.</summary>
        /// <param name="obj">Object to compare with.</param>
        /// <returns>True if bikes are equal.</returns>
        public override bool Equals(object obj)
        {
            var l_oBike = obj as Bike;
            if (l_oBike == null)
            {
                return false;
            }

            return Equals(l_oBike);
        }

        /// <summary> Converts the instance to text.</summary>
        public new string ToString()
        {
            return WheelType == null || TypeOfBike == null 
                ? $"Id={Id}{(!string.IsNullOrEmpty(Description) ? $", {Description}" : "")}"
                : $"Id={Id}{(WheelType != null ? $", wheel(s)={WheelType}" : string.Empty)}{(TypeOfBike != null ? $"type={TypeOfBike}" : "")}.";
        }

        /// <summary> Compares two bike object.</summary>
        /// <param name="obj">Object to compare with.</param>
        /// <returns>True if bikes are equal.</returns>
        public bool Equals(Bike other)
        {
            return other != null &&
                   Id == other.Id &&
                   WheelType == other.WheelType &&
                   TypeOfBike == other.TypeOfBike
                   && Description == other.Description;
        }

        /// <summary> Compares two bike object.</summary>
        /// <param name="obj">Object to compare with.</param>
        /// <returns>True if bikes are equal.</returns>
        public static bool operator ==(Bike bike1, Bike bike2)
        {
            return EqualityComparer<Bike>.Default.Equals(bike1, bike2);
        }

        /// <summary> Compares two bike object.</summary>
        /// <param name="obj">Object to compare with.</param>
        /// <returns>True if bikes are equal.</returns>
        public static bool operator !=(Bike bike1, Bike bike2)
        {
            return !(bike1 == bike2);
        }

        /// <summary>
        /// Generates hash code for bike object.
        /// </summary>
        /// <returns></returns>
        public override int GetHashCode()
        {
            var hashCode = -390870100;
            hashCode = hashCode * -1521134295 + Id.GetHashCode();
            hashCode = hashCode * -1521134295 + WheelType?.GetHashCode() ?? 0;
            hashCode = hashCode * -1521134295 + TypeOfBike?.GetHashCode() ?? 0;
            hashCode = hashCode * -1521134295 + Description?.GetHashCode() ?? 0;
            return hashCode;
        }
    }
}