using UnityEngine;
using System.Collections;

// @NOTE the attached sprite's position should be "top left" or the children will not align properly
// Strech out the image as you need in the sprite render, the following script will auto-correct it when rendered in the game
[RequireComponent (typeof (SpriteRenderer))]

// Generates a nice set of repeated sprites inside a streched sprite renderer
// @NOTE Vertical only, you can easily expand this to horizontal with a little tweaking
public class RepeteSprite : MonoBehaviour {
    SpriteRenderer sprite;
    public Sprite cantoDireito,cantoEsquerdo;
    public PhysicsMaterial2D material;
    void Awake () {
        print ("roou repete sprite");
        // Get the current sprite with an unscaled size
        sprite = GetComponent<SpriteRenderer>();
        Vector2 spriteSize = new Vector2(sprite.bounds.size.x / transform.localScale.x, sprite.bounds.size.y / transform.localScale.y);

        // Generate a child prefab of the sprite renderer
        GameObject childPrefab = new GameObject();
        SpriteRenderer childSprite = childPrefab.AddComponent<SpriteRenderer>();
        BoxCollider2D coll= childPrefab.AddComponent<BoxCollider2D>();
        coll.sharedMaterial = material;
        coll.size = sprite.sprite.bounds.size;
        childPrefab.transform.position = transform.position;
        childSprite.sprite = sprite.sprite;
        childPrefab.layer = 8;


        // Loop through and spit out repeated tiles
        GameObject child;
        print ("l = "+(int)Mathf.Round(sprite.bounds.size.x));
        for (int i = 1, l = (int)Mathf.Round(sprite.bounds.size.x); i <=l*0.5; i++) {
            child = Instantiate(childPrefab) as GameObject;
            child.transform.position = transform.position - (new Vector3(spriteSize.x,0, 0) * i);
            child.transform.parent = transform;
        }

        for (int i = 1, l = (int)Mathf.Round(sprite.bounds.size.x); i <=l*0.5; i++) {
            child = Instantiate(childPrefab) as GameObject;
            child.transform.position = transform.position + (new Vector3(spriteSize.x,0, 0) * i);
            child.transform.parent = transform;
        }

        for (int i = 1, l = (int)Mathf.Round(sprite.bounds.size.y); i <l*0.8f; i++) {
            child = Instantiate(childPrefab) as GameObject;
            child.transform.position = transform.position - (new Vector3(0,sprite.sprite.bounds.size.y, 0) * i);
            child.transform.parent = transform;
            print ("instanciou em y");
        }

        for (int i = 1, l = (int)Mathf.Round(sprite.bounds.size.y); i <l*0.8f; i++) {
            child = Instantiate(childPrefab) as GameObject;
            child.transform.position = transform.position + (new Vector3(0,sprite.sprite.bounds.size.y, 0) * i);
            child.transform.parent = transform;
            print ("instanciou em y");
        }

        //GetComponent<BoxCollider2D>().size = new Vector2(Mathf.Round(sprite.bounds.size.x),Mathf.Round(sprite.bounds.size.y)*0.8f);

        // Set the parent last on the prefab to prevent transform displacement
        childPrefab.transform.parent = transform;

        // Disable the currently existing sprite component since its now a repeated image
        sprite.enabled = false;
    }
}