using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ProjectAirbus.Drawnings;
using ProjectAirbus.Entities;

namespace ProjectAirbus.MovementStrategy
{
    internal abstract class AbstractStrategy
    { 
        // объект
        private IMoveableObject? _moveableObject;
        // статус
        private Status _state = Status.NotInit;
        // границы окна
        protected int FieldWidth { get; private set; }
        protected int FieldHeight { get; private set; }
        public Status GetStatus() { return _state; }

        // Изменить статус, установить поля
        public void SetData(IMoveableObject moveableObject, int width, int height)
        {
            if (moveableObject == null)
            {
                _state = Status.NotInit;
                return;
            }
            _state = Status.InProgress;
            _moveableObject = moveableObject;
            FieldWidth = width;
            FieldHeight = height;
        }

        // сделать шаг
        public void MakeStep()
        {
            if (_state != Status.InProgress)
            { 
                return;
            }
            if (IsTargetDestination())
            {
                _state = Status.Finish;
                return;
            }
            MoveToTarget();
        }

        // перемещения
        protected bool MoveLeft() => MoveTo(DirectionType.Left);
        protected bool MoveRight() => MoveTo(DirectionType.Right);
        protected bool MoveUp() => MoveTo(DirectionType.Up);
        protected bool MoveDown() => MoveTo(DirectionType.Down);

        // параметры
        protected ObjectParameters? GetObjectParameters => _moveableObject?.GetObjectPosition;
        // шаг
        protected int? GetStep()
        {
            if (_state != Status.InProgress)
            {
                return null;
            }
            return _moveableObject?.GetStep;
        }
        // перемещение
        protected abstract void MoveToTarget();

        // достигнута ли цель
        protected abstract bool IsTargetDestination();

        // попытка перемещения по направлению
        private bool MoveTo(DirectionType directionType)
        {
            if (_state != Status.InProgress)
            {
                return false;
            }
            if (_moveableObject?.CheckCanMove(directionType) ?? false)
            {
                _moveableObject.MoveObject(directionType);
                return true;
            }
            return false;
        }
    }
}