using System;
using UnityEngine;

public class TilesetOverlayUsingShader7 : MonoBehaviour
{
    public OnlineMapsTileSetControl control;
    
    public Props[] props = new Props[0];

    private void Start()
    {
        if (control == null) control = OnlineMapsTileSetControl.instance;
        
        control.OnDrawTile += OnDrawTile;
    }

    private void OnDrawTile(OnlineMapsTile tile, Material material)
    {
        for (int i = 0; i < Mathf.Min(props.Length, 7); i++)
        {
            int index = i + 1;
            Props p = props[i];
            
            Vector3 p1 = control.GetWorldPosition(p.leftLongitude, p.topLatitude);
            Vector3 p2 = control.GetWorldPosition(p.rightLongitude, p.bottomLatitude);
            material.SetTexture("_OverlayTex" + index, p.texture);
            material.SetFloat("_OverlayAlpha" + index, p.GetAlpha());
            material.SetVector("_OverlayTL" + index, p1);
            material.SetVector("_OverlayBR" + index, p2);
        }
    }

    private void Update()
    {
        for (int i = 0; i < Mathf.Min(props.Length, 7); i++)
        {
            if (props[i].IsChanged())
            {
                control.map.Redraw();
                break;
            }
        }
    }
    
    [Serializable]
    public class Props
    {
        public bool enabled = true;
        [Range(0, 1)]
        public float alpha = 1;
        public Texture texture;
        public double leftLongitude;
        public double topLatitude;
        public double rightLongitude;
        public double bottomLatitude;
        
        private float _alpha = 1;
        
        public bool IsChanged()
        {
            return _alpha != alpha;
        }
        
        public float GetAlpha()
        {
            if (!enabled) return 0;
            return _alpha = alpha;
        }
    }
}