using UnityEngine;

public class ImprovedArrayModifier : MonoBehaviour
{

    [SerializeField] private Vector3Int count = Vector3Int.one;
    [SerializeField] private Vector3 offset = Vector3.zero;
    [SerializeField, HideInInspector] private GameObject PreviousSource;
    public GameObject Source;
    [SerializeField]
    private bool useRandomPos = false;

    private Vector3 posVec3;

    [SerializeField]
    private Vector2 posRangeX;
    [SerializeField]
    private Vector2 posRangeY;
    [SerializeField]
    private Vector2 posRangeZ;

    public int posSeed;

    Vector3 bounds = Vector3.zero;

    //Wrap in this because we have editor calls that we cannot include in the build.
#if UNITY_EDITOR
    private void OnValidate()
    {
        //Ensure that count is positive
        count = new Vector3Int(Mathf.Max(0, count.x), Mathf.Max(0, count.y), Mathf.Max(0, count.z));

        Random.InitState(posSeed);

        Apply();
    }

    private void Apply()
    {
        if (useRandomPos)
        {
            offset = GenerateRandomV3();
        }

        //only exe in editor, leave
        if (UnityEditor.EditorApplication.isPlayingOrWillChangePlaymode)
        {
            Debug.Log("not supported while playing");
            return;
        }

        if (Source == null)
        {
            Debug.Log("add a GameObject");
            return;
        }

        Renderer rend = Source.GetComponent<Renderer>();
        //Cache transform so it's not constantly accessed
        Transform transform = this.transform;


        if (rend != null)
        {
            bounds = rend.bounds.size;
        }


        int childCount = transform.childCount;
        if (Source != PreviousSource)
        {
            foreach (Transform child in transform)
            {
                //Destroy all children
                UnityEditor.EditorApplication.delayCall += () => { DestroyImmediate(child.gameObject); };
            }
            PreviousSource = Source;

            childCount = 0;
        }
        else
        {
            //Destroy extra children
            int maxchildCount = count.x * count.y * count.z;
            for (int i = transform.childCount - 1; i >= maxchildCount; i--)
            {
                GameObject destroy = transform.GetChild(i).gameObject;
                UnityEditor.EditorApplication.delayCall += () => { DestroyImmediate(destroy); };
            }

            childCount = Mathf.Min(maxchildCount, childCount);
        }

        int childIndex = 0;
        Vector3 parentPosition = transform.localPosition;

        for (int i = 0; i < count.z; i++)
        {
            float z = i * (bounds.z + offset.z);
            for (int i2 = 0; i2 < count.y; i2++)
            {
                float y = i2 * (bounds.y + offset.y);
                for (int i3 = 0; i3 < count.x; i3++)
                {
                    float x = i3 * (bounds.x + offset.x);

                    //Position of the object to create
                    Vector3 childPos = new Vector3(x, y, z);


                    if (childIndex < childCount)
                    {
                        //If we already have a child then we should use it.
                        Transform child = transform.GetChild(childIndex);

                        child.localPosition = childPos;
                        child.localRotation = Quaternion.identity;
                        child.name = $"{Source.name} ({i},{i2},{i3})";
                    }
                    else
                    {
                            //Otherwise there is no child for this index and we need to create a new one
                            GameObject go = Instantiate(Source, parentPosition + childPos, Quaternion.identity, transform);
                            go.name = $"{Source.name} ({i},{i2},{i3})";
                    }


                    childIndex++;
                }//end i3

            }//end i2

        }//end i
    }//end apply
#endif

    public Vector3 GenerateRandomV3()
    {
        float RandomX = Random.Range(posRangeX.x, posRangeX.y);
        float RandomY = Random.Range(posRangeY.x, posRangeY.y);
        float RandomZ = Random.Range(posRangeZ.x, posRangeZ.y);

        posVec3 = new Vector3(RandomX, RandomY, RandomZ);

        print(posVec3);

        return posVec3;
    }
}