using System;
using System.Collections.Generic;
using System.Linq;
using Escape_Room_Engine.Engine.Scripts.Utilities;
using UnityEngine;
using Logger = Escape_Room_Engine.Engine.Scripts.Utilities.Logger;
using LogType = Escape_Room_Engine.Engine.Scripts.Utilities.LogType;
using Object = UnityEngine.Object;

namespace Escape_Room_Engine.Engine.Scripts.Modules
{
    public enum Orientation
    {
        North = 0, East = 90, South = 180, West = 270
    }
    
    public class Module
    {
        public static HashSet<Orientation> EveryOrientation => new(new[]
        {
            Orientation.North, Orientation.East, Orientation.South, Orientation.West
        });

        /// <summary>
        /// Get the space relative (<i>SR</i>) position of this module.
        /// </summary>
        internal Vector2Int SrPosition => srDimensions.Position;
        /// <summary>
        /// Get the room relative (<i>RR</i>) position of this module.
        /// </summary>
        internal Vector2Int RrPosition => _space.ToRoomRelative(SrPosition);

        internal readonly ModuleDescription _description;
        protected GameObject _moduleObject;
        /// <summary>
        /// The space relative (<i>SR</i>) dimensions of this module.
        /// </summary>
        protected Dimensions srDimensions;
        protected Orientation orientation;

        private readonly Space _space;

        internal Module(Space space, ModuleDescription description)
        {
            _space = space;
            _description = description;
        }

        internal bool IsType(ModuleType type)
        {
            return _description.types.Contains(type);
        }

        /// <summary>
        /// Place this module with a position relative to the room.
        /// </summary>
        /// <param name="rrPosition">The room relative (<i>RR</i>) position of this module. Must be inside the space dimensions.</param>
        /// <exception cref="Exception">If the position is not inside the space dimensions.</exception>
        internal void PlaceRoomRelative(Vector2Int rrPosition) => Place(_space.ToSpaceRelative(rrPosition));
        /// <summary>
        /// Place this module with a position relative to the space it is in.
        /// </summary>
        /// <param name="srPosition">The space relative (<i>SR</i>) position of this module. Must be inside the space dimensions.</param>
        /// <exception cref="Exception">If the position is not inside the space dimensions.</exception>
        internal void Place(Vector2Int srPosition) {
            if (_space != null && !srPosition.IsInsideRelative(_space.rrDimensions))
            {
                throw new Exception($"Trying to place {this} at {srPosition}, which is outside space dimensions {_space.rrDimensions}.");
            }
            
            srDimensions.Position = srPosition;
            
            Logger.Log($"{this} has been placed at {srPosition} (SR)", LogType.ModulePlacement);
        }

        internal void Orient(Orientation o)
        {
            orientation = o;
        }

        internal void InstantiateModule(Transform parent)
        {
            _moduleObject = new GameObject(ToString());
            _moduleObject.transform.SetParent(parent, false);
            _moduleObject.transform.localPosition = new Vector3(srDimensions.x + .5f, 0, srDimensions.z + .5f);
            _moduleObject.transform.Rotate(Vector3.up, (float)orientation);
            
            Object.Instantiate(_description.modulePrefab, _moduleObject.transform, false);
        }

        public override string ToString()
        {
            return $"Module ({string.Join(", ", _description.types.ToList().ConvertAll(type => type.ToString()))})";
        }
    }
}