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

public class LaneController : MonoBehaviour {

    public bool traffic = true;
    public bool positiveFlow = true;
    public float speed = 1.0f;
    public float density = 0.5f;

    public Material pavementMaterial;
    public Material roadMaterial;

    public GameObject carPrefab;

    public bool canSpawnCar = true;


	// Use this for initialization
	void Start () {
        if (traffic)
        {
            GetComponent<MeshRenderer>().material = roadMaterial;
        } else
        {
            GetComponent<MeshRenderer>().material = pavementMaterial;
        }
    }

	// Update is called once per frame
	void Update () {
        if (canSpawnCar && traffic)
        {
            if(Random.Range(0.0f, 1.0f) < density)
            {
                canSpawnCar = false;
                GameObject go = (GameObject)Instantiate(carPrefab);
                Transform t = GetComponent<Transform>();
                Vector3 pos = t.position;
                pos.x = -0.5f * t.localScale.x;
                pos.y = 0.9f;
                if (!positiveFlow)
                {
                    pos.x = pos.x * -1;
                    Vector3 a = new Vector3(0, 180, 0);
                    go.transform.localEulerAngles = a;

                }
                go.transform.position = pos;
            }
        }
	}

    public void enterEndZone(GameObject car, bool positiveEndZone)
    {
        if (positiveFlow && positiveEndZone)
        {
            Destroy(car);
        }
        else if (!positiveFlow && !positiveEndZone)
        {
            Destroy(car);
        }
    }

    public void exitEndZone(GameObject car, bool positiveEndZone)
    {
        if (positiveFlow && !positiveEndZone)
        {
            canSpawnCar = true;
        }
        else if (!positiveFlow && positiveEndZone)
        {
            canSpawnCar = true;
        }
    }
}