using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerController : MonoBehaviour
{

    public float Speed = 1.0f;
    public float MoveDistance = 2.0f;

    public enum MOVEMENTTYPE
    {
        MOVING,
        PUSHING,
        IDLE
    };

    public MOVEMENTTYPE MovementState;

    // public Transform transform;

    // Use this for initialization
    void Start()
    {
        MovementState = MOVEMENTTYPE.IDLE;
    }

    // Update is called once per frame
    void Update()
    {
        switch (MovementState)
        {
            case MOVEMENTTYPE.IDLE:
                HandleInput();
                break;
            case MOVEMENTTYPE.MOVING:

                break;
            case MOVEMENTTYPE.PUSHING:

                break;
        }

    }

    public void HandleInput()
    {
        Vector3 movement_vector = new Vector3(0f, 0f, 0f);

        if (MovementState == MOVEMENTTYPE.MOVING) return;

        if (Input.GetAxis("Horizontal") > 0f)
        {
            movement_vector = new Vector3(MoveDistance, 0f, 0f);

        }
        else if (Input.GetAxis("Horizontal") < 0f)
        {
            movement_vector = new Vector3(-MoveDistance, 0f, 0f);

        }
        else if (Input.GetAxis("Vertical") > 0f)
        {
            movement_vector = new Vector3(0f, 0f, MoveDistance);

        }
        else if (Input.GetAxis("Vertical") < 0f)
        {
            movement_vector = new Vector3(0f, 0f, -MoveDistance);
        }
        if (movement_vector.magnitude != MoveDistance) return;

        StartCoroutine(Move(FixToGrid(transform.position + movement_vector)));
    }

    private IEnumerator Move(Vector3 targetPos)
    {
        MovementState = MOVEMENTTYPE.MOVING;

        var dir = Vector3.Normalize(targetPos - transform.position);
        while(Vector3.Distance(transform.position,targetPos) > 0.1f)
        {
            transform.position += dir * Time.deltaTime * Speed;
            yield return null;
        }
        MovementState = MOVEMENTTYPE.IDLE;
    }

    public Vector3 FixToGrid(Vector3 _vector)
    {
        return new Vector3(
        Mathf.Round(_vector.x),
        Mathf.Round(_vector.y),
        Mathf.Round(_vector.z));
    }

}