using Plugins.Gis.Gps;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering;

public class DronePathRenderer : MonoBehaviour {

    private LineRenderer lineRenderer;
    private OnlineMapsTileSetControl control;
    private OnlineMaps map;

    public List<GpsCoordinates> positions;
    public int droneID;

    public Color color = new Color();

    public int nb;
    
    private void Start()
    {
        map = OnlineMaps.instance;
        control = OnlineMapsTileSetControl.instance;
        

        lineRenderer = gameObject.AddComponent<LineRenderer>();
        lineRenderer.widthCurve = AnimationCurve.Constant(0, 1, 10);
        lineRenderer.positionCount = 0;
        lineRenderer.material.color = color;
        lineRenderer.receiveShadows = false;
        lineRenderer.shadowCastingMode = ShadowCastingMode.Off;
        lineRenderer.material.shader = Shader.Find("Unlit/Texture_color");
        lineRenderer.startWidth = 3;
        lineRenderer.endWidth = 3;

        control.OnMeshUpdated += OnMeshUpdated;
        control.OnSmoothZoomProcess += OnSmoothZoomProcess;
    }
    public void setColor(Color c)
    {
        color = c;
    }
    public void AddPosition(GpsCoordinates pos)
    {
        positions.Add(pos);
        Debug.Log("Add to " + droneID);
    }

    private Vector3 GetWorldPositionWithAltitude(GpsCoordinates pos)
    {
        double lng = pos.Longitude;
        double lat = pos.Latitude;
        float altitude = (float)pos.Altitude;

        double tlx, tly, brx, bry;
        map.GetCorners(out tlx, out tly, out brx, out bry);

        Vector3 p;

        if (altitude > 0)
        {
            p = OnlineMapsTileSetControl.instance.GetWorldPosition(lng, lat);
            float yScale = control.GetBestElevationYScale(tlx, tly, brx, bry);
            p.y = altitude * yScale;
            if (control.elevationBottomMode == OnlineMapsTileSetControl.ElevationBottomMode.minValue) p.y -= control.elevationMinValue * yScale;
            p.y *= control.elevationScale;
        }
        else p = OnlineMapsTileSetControl.instance.GetWorldPositionWithElevation(lng, lat, tlx, tly, brx, bry);

        return p;
    }

    private void OnMeshUpdated()
    {
        UpdateLineRenderer();
    }
    private void OnSmoothZoomProcess()
    {
        Debug.Log("zooming");
        UpdateLineRenderer();
    }
    
    public void UpdateLineRenderer()
    {
        Vector3[] points = new Vector3[positions.Count];
        lineRenderer.positionCount = positions.Count;
        nb = positions.Count;
        for (int i = 0; i < positions.Count; i++)
        {
            points[i] = GetWorldPositionWithAltitude(positions[i]);
        }
        lineRenderer.SetPositions(points);
    }
}