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

public class ProceduralMultiTerrain : MonoBehaviour
{

    public GameObject[] terrainPrefab;
    [SerializeField] private int width = 24;
    [SerializeField] private int height = 32;
    private GameObject[,] terrainList;
    private bool isDirty = true;
    public float offsetX;
    public float offsetY;
    [SerializeField] private float perlinWeight = 0.01f;
    [SerializeField] private float step = 0.2f;
    void Awake()
    {
        Debug.Log( "Setting up Terrain" );
        terrainList = new GameObject[width, height];
        SetTerrainLocAndType();

    }

    void SetTerrainLocAndType()
    {
        for( int x = 0; x < width; x++ )
        {
            for( int y = 0; y < height; y++ )
            {
                float yDiff = y * perlinWeight + offsetX;
                float xDiff = x * perlinWeight + offsetY;

                int prefabSelected = (int)( Mathf.PerlinNoise( xDiff, yDiff ) * terrainPrefab.Length );
                prefabSelected = Mathf.Clamp( prefabSelected, 0, terrainPrefab.Length - 1 );

                float loc = Mathf.Round( Mathf.PerlinNoise( xDiff, yDiff ) * 35 ) ;

                Vector3 pos = transform.position + new Vector3( x, loc, y );

                terrainList[x, y] = Instantiate( terrainPrefab[prefabSelected], pos, transform.rotation, transform );
                terrainList[x, y].name = "Tile " + x + "," + y;

            }
        }
        isDirty = false;
    }

    public float getTerrainHeight( int x, int y )
    {
        return terrainList[x, y].transform.position.y;
    }
    public float getTerrainHeight( Vector2Int loc )
    {
        if( terrainList[loc[0], loc[1]] )
        {
            Debug.Log( terrainList[loc[0], loc[1]].transform.position );
            float y = terrainList[loc[0], loc[1]].transform.position.y;
            return y;
        }
        return -999;

    }
}