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

public class PathActor : MonoBehaviour {

    public Transform startt;
    public Transform destt;

    private PathManager pathManager;
    private List<Vector3> pathList = new List<Vector3>();

    public float nodeRadius = 1.5F;
    public float turnSpeed = 5;
    public float moveSpeed = 5;

    void Start () {
        pathManager = GetComponent<PathManager>();
    }

    void Update () {
        if (Input.GetMouseButtonUp(1)) {
            MouseTwoUp(Input.mousePosition);
        }

        if (pathList.Count != 0) {
                MoveToDest();
        }
    }

    void MouseTwoUp (Vector2 cPoint) {
        Ray ray = Camera.main.ScreenPointToRay(cPoint);
        RaycastHit hit;

        if (Physics.Raycast(ray,out hit)) {
            Vector3 dest = hit.point;
            dest = dest + hit.normal;
            GetPath(startt.position, dest);
        }
    }

    void GetPath (Vector3 start, Vector3 dest) {
        pathList.Clear();
        pathList = pathManager.FindPath(start, dest);
        Debug.Log("Calling from Actor returns : " + pathList.Count + " nodes in the path");
    }

    void MoveToDest () {
        if (pathList[0] == startt.position) pathList.RemoveAt(0);

        startt.rotation = Quaternion.Lerp (startt.rotation,
                                           Quaternion.LookRotation(pathList[0] - startt.position),
                                           Time.deltaTime * turnSpeed);

        startt.position += startt.forward * moveSpeed * Time.deltaTime;

        if(Vector3.Distance(startt.position, pathList[0]) < nodeRadius) {
            pathList.RemoveAt(0);
            Debug.Log(pathList.Count + " nodes left in pathList");
        }
    }
}