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

public class LevelGenerator : MonoBehaviour
{
    public GameObject cube;

    [Header("Spawn")]

    public int minBlocks=2;
    public int maxBlocks = 5;
    public Vector3 minScale = Vector3.one;
    public Vector3 maxScale = new Vector3(2,8,2);
    public float rotationRange = 15;

    public float distanceBetweenBlocks = 10;
    public float rowSpacing = 20;

    public int curBlock = 1;

    void Start()
    {
        Application.targetFrameRate= 60;
    }

    float t =0;
    public List<GameObject> borrowedObjects = new List<GameObject>();
    void Update()
    {
       if(PlayerController.instance.transform.position.z > (curBlock-4) * distanceBetweenBlocks){
        GenerateBlock();
       }

        if(t < 1){
            t+=Time.deltaTime;
        }else{
            t=0;
            CheckBorrowed();
        }
    }

    void CheckBorrowed(){
        List<int> itemsToRemove = new List<int>();
        for(int i=0; i < borrowedObjects.Count; i++){
            if(borrowedObjects[i].transform.position.z < PlayerController.instance.transform.position.z){
                ObjectPool.Despawn(borrowedObjects[i]);
                itemsToRemove.Add(i);
            }
        }

        for(int i = itemsToRemove.Count-1; i > 0;i--){
            borrowedObjects.RemoveAt(i);
        }
    }


    void GenerateBlock(){
        int cubesCount = Random.Range(minBlocks, maxBlocks);
        float baseX = PlayerController.instance.transform.position.x -Random.Range(rowSpacing /2f, rowSpacing);
        for(int j =0; j < 5; j++){
            bool flip = false;

            for(int i =0; i < cubesCount; i++){
                float z = distanceBetweenBlocks * curBlock;

                Vector3 size = new Vector3(Random.Range(minScale.x,maxScale.x),Random.Range(minScale.y,maxScale.y),Random.Range(minScale.z,maxScale.z));
                float x = baseX + (i * size.x * (flip ? -1 : 1));

                // GameObject newCube = Instantiate(cube, new Vector3(x,size.y * 0.4f,z), Quaternion.identity);
                GameObject newCube = ObjectPool.Spawn(cube, new Vector3(x,size.y * 0.4f,z));
                borrowedObjects.Add(newCube);
                newCube.transform.localScale = size;
                newCube.transform.Rotate(new Vector3(0,0, rotationRange * ((float)i / (float)cubesCount) * (flip ? 1 : -1)));
                flip = !flip;
            }

            baseX += Random.Range(rowSpacing / 2f, rowSpacing);
        }        

        curBlock++;
    }
}