using UnityEngine;

namespace Gameplay.LegionBattle.View
{
    public class FightLineStandUnit2 : MonoBehaviour
    {
        [HideInInspector]
        public int standCellIndex = -1;

        public int maxDistance = 3;
        public int side = 1;

        public bool isBuild = false;
        public float moveSpeed = 5f;

        private bool _needMove;
        private Vector3 _targetPos;

        public bool isPosChanged
        {
            get;
            set;
        }

        public void MoveTo(Vector3 worldPos)
        {
            _targetPos = worldPos;
            _targetPos.y = 0;
            _needMove = true;
        }

        public void Init()
        {
            _UpdateStandPos();

            var worldPos = FightLineControl2.instance.m_tgs.CellGetPosition(standCellIndex);
            transform.position = worldPos;
        }

        public void ViewUpdate(float dt)
        {
            if (!_needMove) return;
            var nowPos = transform.position;
            var toTarget = _targetPos - nowPos;
            toTarget.y = 0;
            var distance = toTarget.magnitude;
            var moveDt = dt * moveSpeed;
            if (distance > moveDt)
            {
                var moveDir = toTarget.normalized;
                var movePos = nowPos + moveDir * moveDt;
                transform.position = movePos;
            }
            else
            {
                transform.position = _targetPos;
                _needMove = false;
            }
            _UpdateStandPos();
        }

        private void _UpdateStandPos()
        {
            var newCell = FightLineControl2.instance.m_tgs.CellGetAtPosition(transform.position, true);
            if (newCell == null)
            {
                return;
            }
            if (standCellIndex != newCell.index)
            {
                standCellIndex = newCell.index;
                isPosChanged = true;
            }
        }
    }
}