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

public class MapLodCtrl : MonoBehaviour
{
    public CameraBirdSec cameraBirdSec;

    public List<LodLayer> MapList = new List<LodLayer>();
    private int currentMapIndex;
    public List<LodStayLayer> MapStayList = new List<LodStayLayer>();
    
    private void Awake()
    {
        cameraBirdSec.OnDistanceChange += OnCameraDistanceChange;
    }

    private void Start()
    {
        currentMapIndex = MapList.Count - 1;
        MapList[currentMapIndex].map.ShowMap();
        //cameraBirdSec.detailLod = false;
        cameraBirdSec.currentDistance = MapList[currentMapIndex].cameraDistanceMax;
        SetCameraRange(cameraBirdSec.currentDistance);
    }

    private void OnDestroy()
    {
        cameraBirdSec.OnDistanceChange -= OnCameraDistanceChange;
    }

    private void OnCameraDistanceChange(float value)
    {
        SetCameraRange(value);
        // if (currentMapIndex == 0)
        // {
        //     if (value > MapList[currentMapIndex].cameraDistanceMax)
        //     {
        //         MapList[currentMapIndex+1].map.ShowMap();
        //         MapList[currentMapIndex].map.Hide();
        //         currentMapIndex++;
        //
        //         cameraBirdSec.detailLod = false;
        //         cameraBirdSec.currentDistance = MapList[currentMapIndex].cameraDistanceMax;
        //         SetCameraRange(MapList[currentMapIndex].cameraDistanceMax);
        //         return;
        //     }
        //     SetCameraRange(value);
        for (int i = 0; i < MapStayList.Count; i++)
        {
            if (value < MapStayList[i].cameraDistanceMax)
            {
                MapStayList[i].map.ShowMap();
            }
            else
            {
                MapStayList[i].map.Hide();
            }
        }
        // }
        // else
        // {
            // if (value>0)
            // {
            //     MapList[currentMapIndex-1].map.ShowMap();
            //     MapList[currentMapIndex].map.Hide();
            //     currentMapIndex--;
            //     // if (currentMapIndex == 0)
            //     // {
            //     //     cameraBirdSec.detailLod = true;
            //     // }
            // }
            // else
            // {
            //     if (currentMapIndex >= MapList.Count - 1)
            //     {
            //         return;
            //     }
            //     MapList[currentMapIndex+1].map.ShowMap();
            //     MapList[currentMapIndex].map.Hide();
            //     currentMapIndex++;
            // }
            // cameraBirdSec.currentDistance = MapList[currentMapIndex].cameraDistanceMax;
            // SetCameraRange(MapList[currentMapIndex].cameraDistanceMax);
        //}
    }

    private void SetCameraRange(float cameraDistance)
    {
        var currentLayer = MapList[currentMapIndex];
        float distanceRange = (cameraDistance-currentLayer.cameraDistanceMin)/(currentLayer.cameraDistanceMax-currentLayer.cameraDistanceMin);
        float minX =currentLayer.min_X_Range.x+Mathf.Abs(currentLayer.min_X_Range.x-currentLayer.max_X_Range.x)*distanceRange; 
        float maxX =currentLayer.min_X_Range.y-Mathf.Abs(currentLayer.min_X_Range.y-currentLayer.max_X_Range.y)*distanceRange; 
        float minY =currentLayer.min_Y_Range.y+Mathf.Abs(currentLayer.min_Y_Range.y-currentLayer.max_Y_Range.y)*distanceRange; 
        float maxY =currentLayer.min_Y_Range.x-Mathf.Abs(currentLayer.min_Y_Range.x-currentLayer.max_Y_Range.x)*distanceRange;
        //Debug.Log(minX);
        //Debug.Log(maxX);
        //Debug.Log(minY);
        //Debug.Log(maxY);
        cameraBirdSec.SetRange(minX,maxX,minY,maxY);
    }
    
}

[Serializable]
public class LodLayer
{
    public MapGenerator map;
    public float cameraDistanceMin;
    public float cameraDistanceMax;
    public Vector2 min_X_Range;//最短距离时候的X范围
    public Vector2 max_X_Range;//最大距离时候的X范围
    public Vector2 min_Y_Range;
    public Vector2 max_Y_Range;
}

[Serializable]
public class LodStayLayer
{
    public MapGenerator map;
    public float cameraDistanceMin;
    public float cameraDistanceMax;
}