using System;
using UnityEngine;
using sam;

[ExecuteInEditMode]
public class SelectedDataPoint3DVisualizer : MonoBehaviour
{
    public PointVariable3DVisualizer varViz;
    public float cylinderWidth = 0.01f;

    PointVariableSubsession pvls;
    Renderer rendr;

    void Awake()
    {
        pvls = GetComponentInParent<PointVariableSubsession>();
        rendr = GetComponent<Renderer>();
        rendr.enabled = false;
    }

    public void OnTimeStampChanged(DateTime t)
    {
        Recompute();
    }

    public void OnScaleFactorChanged(float s)
    {
        Recompute();
    }

    public void Recompute()
    {
        if (pvls.selectedDP == null)
        {
            rendr.enabled = false;
            return;
        }

        float valscale = (pvls.scaleFactor * varViz.scaleFactor * varViz.distanceCoveredEstimate) / pvls.prodvar.scaledRange;
        float val = pvls.selectedDP.variables[pvls.variableIndex];
        float scaledElevation = (val - pvls.prodvar.scaledMinValue) * valscale;

        Vector3 geoCoords = new Vector3(pvls.selectedDP.longitude, pvls.selectedDP.latitude, varViz.heightGap + scaledElevation);
        Vector3 xyzTop = Utils.DegLonLatHgtToXYZ(geoCoords, true);

        FitCylinder(transform, Vector3.zero, xyzTop, cylinderWidth);
        rendr.enabled = true;
    }

    void FitCylinder(Transform cylinder, Vector3 start, Vector3 end, float width)
    {
        Vector3 offset = end - start;
        Vector3 scale = new Vector3(width, offset.magnitude * 0.5f, width);
        var position = start + (offset * 0.5f);

        cylinder.transform.localPosition = position;
        cylinder.transform.up = offset;
        cylinder.transform.localScale = scale;
    }
}