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

public enum MapTextureType
{
    png,
    jpg
}

public class MapGenerator : MonoBehaviour
{
    public string nameHeard = "L";
    public int x_Count = 0;
    public int y_Count = 0;

    public string ab_Name;

    private List<GameObject> quadList = new List<GameObject>();

    private bool isInit = false;
    private bool isShow = false;
    public MapTextureType TextureType;
    public bool initDone = false;
    
    public void InitMap()
    {
        if (!isInit)
        {
            StartCoroutine(CreatMap(false));
        }
    }

    public void ShowMap()
    {
        if (!isShow)
        {
            isShow = true;
            if (!isInit)
            {
                StartCoroutine(CreatMap(true));
            }
            else
            {
                foreach (var mapQuad in quadList)
                {
                    mapQuad.SetActive(true);
                }
            }
        }
    }

    public void Hide()
    {
        if (isShow)
        {
            isShow = false;
            foreach (var mapQuad in quadList)
            {
                mapQuad.SetActive(false);
            }
        }
    }

    private IEnumerator CreatMap(bool showQuad=false)
    {
        isInit = true;
        WaitForSeconds wait = new WaitForSeconds(0.01f);
        for (int i = 0; i < x_Count; i++)
        {
            for (int j = 0; j < y_Count; j++)
            {
                GeneratorQuad(i, j, new Vector2(1, 1),showQuad);
            }

            yield return wait;
        }
        initDone = true;
    }

    private void GeneratorQuad(int _x, int _y, Vector2 _size,bool showQuad)
    {
        string texName = $"{nameHeard}{_x}_{_y}";
        GameObject tempQuad = new GameObject(texName);
        if (!isShow||showQuad == false)
        {
            tempQuad.SetActive(false);
        }
        MeshFilter meshFilter = tempQuad.AddComponent<MeshFilter>();
        MeshRenderer meshRenderer = tempQuad.AddComponent<MeshRenderer>();
        Material tempMat = new Material(Shader.Find("Unlit/Texture"));
        meshRenderer.material = tempMat;

        TextureLoadHelp._Instance.LoadTexFromUrl_AB(ab_Name + "_" + _x, texName + "."+TextureType.ToString(), tempMat);

        Mesh mesh = new Mesh();
        mesh.vertices = new Vector3[]
        {
            new Vector3(-_size.x / 2, -_size.y / 2, 0), // BL
            new Vector3(-_size.x / 2, _size.y / 2, 0), // TL
            new Vector3(_size.x / 2, _size.y / 2, 0), // TR
            new Vector3(_size.x / 2, -_size.y / 2, 0), // BR
        };
        mesh.uv = new Vector2[]
        {
            new Vector2(0, 0), // BL
            new Vector2(0, 1), // TL
            new Vector2(1, 1), // TR
            new Vector2(1, 0), // BR
        };
        mesh.triangles = new int[] { 0, 1, 2, 2, 3, 0 };

        meshFilter.mesh = mesh;

        tempQuad.transform.SetParent(this.transform);
        tempQuad.transform.localScale = Vector3.one;
        var x = (-x_Count * 0.5f) + (_y * _size.x) + 0.5f;
        var y = (y_Count * 0.5f) - (_x * _size.y) - 0.5f;
        tempQuad.transform.localPosition = new Vector3(x, y, 0);
        quadList.Add(tempQuad);
    }
}