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

[System.Serializable]
public class MyGridMap : MonoBehaviour
{
    private const int V = 0;
    public static int Row;
    public static int Col;
    public static int W = 20;
    public static int H = 20;
    public struct MapPos
    {
        public MapPos(int r,int c)
        {
            this.Row = r;
            this.Col = c;
        }
        int Row;
        int Col;
    }
    public Dictionary<MapPos, MyTile> mapTiles = new Dictionary<MapPos, MyTile>();
    public Dictionary<MapPos, Collider> tileBox = new Dictionary<MapPos, Collider>();

    private void Awake()
    {
    }
    // Start is called before the first frame update
    void Start()
    {
        
    }

    public void AddMyGrid(int r,int c,float w, float h)
    {
        GameObject box = GameObject.CreatePrimitive(PrimitiveType.Cube);
        box.name = "grid_" + r.ToString() + "_" + c.ToString();
        box.transform.parent = this.transform;
        box.transform.SetLocalPositionY(0);
        box.transform.SetLocalPositionX(w * c);
        box.transform.SetLocalPositionZ(h * r);
        box.transform.localScale = new Vector3(w, 20, h);
        mapTiles.Add(new MapPos(r, c), box.GetOrAddComponent<MyTile>());
        box.GetOrAddComponent<BoxCollider>().isTrigger = true;
        tileBox.Add(new MapPos(r, c), box.GetOrAddComponent<BoxCollider>());
    }
    public void OptimizeTerrain(GameObject obj)
    {
        ResetGridData();
        for (int i = 0; i < obj.transform.childCount; ++i)
        {
            Terrain t = obj.transform.GetChild(i).GetComponent<Terrain>();
            if(!t)
            {
                continue;
            }
            t.heightmapPixelError = 200;
            float offsetX = (int)t.transform.position.x - this.transform.position.x;
            float offsetZ = (int)t.transform.position.z - this.transform.position.z;
            MapPos gridPos = new MapPos((int)offsetZ / H, (int)offsetX / W);
            mapTiles[gridPos].AddSplitTerrain(t);
        }
    }

    public void MateObjToGrid(GameObject obj)
    {
        RefresGridData();
        for (int i = 0; i < obj.transform.childCount; ++i)
        {
            Transform element = obj.transform.GetChild(i);
            float offsetX = (int)element.transform.position.x - this.transform.position.x;
            float offsetZ = (int)element.transform.position.z - this.transform.position.z;
            MapPos gridPos = new MapPos((int)offsetZ / H, (int)offsetX / W);
            mapTiles[gridPos].AddElement(element.gameObject);
        }
    }

    public void AddSubObjToGrid(GameObject obj)
    {
        for (int i = 0; i < obj.transform.childCount; ++i)
        {
            Transform element = obj.transform.GetChild(i);
            float offsetX = Mathf.Abs((int)element.transform.localToWorldMatrix.GetPosition().x - this.transform.position.x);
            float offsetZ = Mathf.Abs((int)element.transform.localToWorldMatrix.GetPosition().z - this.transform.position.z);
            MapPos gridPos = new MapPos((int)offsetZ / H, (int)offsetX / W);
            mapTiles[gridPos].AddElement(element.gameObject);
        }
    }

    public void AddOneObjToGrid(GameObject obj)
    {
        obj.SetActive(false);
        Transform element = obj.transform;
        float offsetX = Mathf.Abs((int)element.transform.localToWorldMatrix.GetPosition().x - this.transform.position.x);
        float offsetZ = Mathf.Abs((int)element.transform.localToWorldMatrix.GetPosition().z - this.transform.position.z);
        MapPos gridPos = new MapPos((int)offsetZ / H, (int)offsetX / W);
        if (mapTiles.ContainsKey(gridPos))
        {
            mapTiles[gridPos].AddElement(element.gameObject);
        }
        else
        {
            RefresGridData();
        }
    }

    public void RefresGridData()
    {
        mapTiles.Clear();
        for (int i = 0; i < transform.childCount; ++i)
        {
            Transform gridTild = transform.GetChild(i);
            string[] nameStr = gridTild.name.Split('_');
            MapPos pos = new MapPos(int.Parse(nameStr[1]), int.Parse(nameStr[2]));
            mapTiles.Add(pos, gridTild.gameObject.GetOrAddComponent<MyTile>());
        }
    }

    public void ResetGridData()
    {
        for (int i = 0; i < transform.childCount; ++i)
        {
            Transform gridTild = transform.GetChild(i);
            string[] nameStr = gridTild.name.Split('_');
            MapPos pos = new MapPos(int.Parse(nameStr[1]), int.Parse(nameStr[2]));
            mapTiles[pos] = gridTild.gameObject.GetOrAddComponent<MyTile>();
        }
    }
}