using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using JetBrains.Annotations;
using Pools;
using Routes;
using UnityEngine;

namespace Roads
{
    [Serializable]
    public struct CrossingData
    {
        public Transform west;
        public Transform north;
        public Transform east;
        public Transform south;
    }

    public enum RoadDirection
    {
        West,
        North,
        East,
        South,
        None
    }

    public enum TurnDirection
    {
        Right,
        Left,
        Straight
    }

    static class TurnDirectionMapper
    {
        private static readonly Dictionary<RoadDirection, TurnDirection> fromSouth =
            new Dictionary<RoadDirection, TurnDirection>
            {
                {RoadDirection.East, TurnDirection.Right},
                {RoadDirection.West, TurnDirection.Left}
            };

        private static readonly Dictionary<RoadDirection, TurnDirection> fromNorth =
            new Dictionary<RoadDirection, TurnDirection>
            {
                {RoadDirection.East, TurnDirection.Left},
                {RoadDirection.West, TurnDirection.Right}
            };

        private static readonly Dictionary<RoadDirection, TurnDirection> fromWest =
            new Dictionary<RoadDirection, TurnDirection>
            {
                {RoadDirection.North, TurnDirection.Left},
                {RoadDirection.South, TurnDirection.Right}
            };

        private static readonly Dictionary<RoadDirection, TurnDirection> fromEast =
            new Dictionary<RoadDirection, TurnDirection>
            {
                {RoadDirection.North, TurnDirection.Right},
                {RoadDirection.South, TurnDirection.Left}
            };

        public static TurnDirection GetTurnDirection(RoadDirection from, RoadDirection to)
        {
            TurnDirection direction;
            switch (from)
            {
                case RoadDirection.West:
                    return fromWest.TryGetValue(to, out direction) ? direction : TurnDirection.Straight;
                case RoadDirection.North:
                    return fromNorth.TryGetValue(to, out direction) ? direction : TurnDirection.Straight;
                case RoadDirection.East:
                    return fromEast.TryGetValue(to, out direction) ? direction : TurnDirection.Straight;
                case RoadDirection.South:
                    return fromSouth.TryGetValue(to, out direction) ? direction : TurnDirection.Straight;
                default:
                    return TurnDirection.Straight;
            }
        }
    }

    public class CrossingExtras : Turn
    {
        public CrossingData crossingData;

        protected override Transform RoadDirectionToTransform(RoadDirection position)
        {
            switch (position)
            {
                case RoadDirection.North:
                    return crossingData.north;
                case RoadDirection.West:
                    return crossingData.west;
                case RoadDirection.East:
                    return crossingData.east;
                case RoadDirection.South:
                    return crossingData.south;
                case RoadDirection.None:
                    throw new ArgumentException("RoadDirection.None not allowed for adding arrows");
                default:
                    throw new ArgumentOutOfRangeException(nameof(position), position, "Wrong Argument for AddArrows");
            }
        }
    }
}