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

public class LevelGenerator : MonoBehaviour
{
    public static LevelGenerator instance{get; private set;}
    [SerializeField]private GameObject LevelPrefab;
    // [SerializeField]private GameObject TopPrefab;
    private List<GameObject> spawnedLevels = new List<GameObject>();
    [SerializeField]private float spaceBetween = 1;
    [SerializeField]private float verticalSpace = 2;
    [SerializeField]private float maxLow;
    [SerializeField]private float maxHigh;

    [SerializeField]private List<float> Levels;

    void Awake(){
        instance = this;
    }

    void Start()
    {
        GenerateAhead(200);
    }


    public void GenerateAhead(int count = 10){
        if(Levels.Count <= 0){
            Levels = new List<float>();
        Levels.Add(1);

        }
        int startIndex= Levels.Count;
        int lastIndex = Levels.Count +count;
        for(int i =startIndex; i < lastIndex; i++){
            float LastLevel = Levels[i-1];
            float NewLevel = LastLevel + Random.Range(-maxLow, maxHigh);

            Levels.Add(NewLevel);
            
            float posX = i * spaceBetween;
            float posY = Levels[i];

            GameObject newLevelObj = Instantiate(LevelPrefab, new Vector3(posX,posY,0), Quaternion.identity);
            newLevelObj.transform.parent=transform;
            spawnedLevels.Add(newLevelObj);
            // newLevelObj.transform.localScale = new Vector3(newLevelObj.transform.localScale.x, Mathf.Abs(LastLevel - NewLevel),1);
            Color color = (LastLevel < NewLevel) ? Color.green : Color.red;
            Color color2 = (LastLevel < NewLevel) ? new Color(0,0.29f,0) : new Color(0.29f,0,0);

            
            newLevelObj.GetComponentInChildren<SpriteRenderer>().color = color;
            

            // GameObject topObj = Instantiate(TopPrefab, new Vector3(posX, posY + verticalSpace,0), Quaternion.identity);
            // topObj.transform.parent = newLevelObj.transform;

            // topObj.GetComponentInChildren<SpriteRenderer>().color =color2;
        }
    }

    // Update is called once per frame
    void Update()
    {
        
    }


    void OnDrawGizmos(){
        if(Levels == null){return;}
        if(Levels.Count < 2){return;}
        for(int i=1; i < Levels.Count; i++){
            Gizmos.DrawLine(new Vector3((i-1)*spaceBetween,  Levels[i-1]), new Vector3((i)*spaceBetween,  Levels[i]));
        }
    }
}