using System;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using Unity.UIWidgets.foundation;

namespace UIWidgetsSample
{
    public abstract class Equatable : IEquatable<Equatable>
    {
        /// {@macro equatable}
        public Equatable()
        {
        }


        /// {@template equatable_props}
        /// The list of properties that will be used to determine whether
        /// two instances are equal.
        /// {@endtemplate}
        public abstract List<Object>  props

        {
            get;
        }

        /// {@template equatable_stringify}
        /// If set to `true`, the [toString] method will be overridden to output
        /// this instance's [props].
        ///
        /// A global default value for [stringify] can be set using
        /// `EquatableConfig.stringify`.
        ///
        /// If this instance's [stringify] is set to null, the value of
        /// `EquatableConfig.stringify` will be used instead. This defaults to
        /// `false`.
        /// {@endtemplate}
        // ignore: avoid_returning_null
        bool? stringify
        {
            get
            {
                return null;
            }
        }
        public static bool operator ==(Equatable left,Equatable right)
        {
            return left is Equatable && Equals(left, right) && Equals(left.props,right.props);
        }

        public static bool operator !=(Equatable left, Equatable right)
        {
            return !(left == right);
        }


       

       /* public override int GetHashCode() {
            return (this.GetType().GetHashCode()) ^ mapPropsToHashCode(props);
        }*/   // ????
        
        public override string ToString() {
            switch (stringify) {
                case true:
                    return EquatableUtils.mapPropsToString(this.GetType(), props);
                case false:
                    return this.GetType().ToString();
                default:
                    return EquatableConfig.stringify == true
                        ? EquatableUtils.mapPropsToString(this.GetType(), props)
                        : this.GetType().ToString();
            }
        }

        public bool Equals(Equatable other)
        {
            if (ReferenceEquals(null, other)) return false;
            if (ReferenceEquals(this, other)) return true;
            return Equals(props, other.props);
        }

        public override bool Equals(object obj)
        {
            if (ReferenceEquals(null, obj)) return false;
            if (ReferenceEquals(this, obj)) return true;
            if (obj.GetType() != this.GetType()) return false;
            return Equals((Equatable) obj);
        }

        public override int GetHashCode()
        {
            return (props != null ? props.GetHashCode() : 0);
        }
    }

    
    
}