app/app/src/main/java/com/danilafe/fencelessgrazing/CollarDetailActivity.kt

package com.danilafe.fencelessgrazing

import android.graphics.Color
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.danilafe.fencelessgrazing.model.CollarPos
import com.danilafe.fencelessgrazing.model.Polygon
import org.osmdroid.util.GeoPoint
import org.osmdroid.views.MapView

class CollarDetailActivity : AppCompatActivity() {

    private lateinit var token: String
    private var collarId: Int = -1

    private lateinit var map: MapView

    private lateinit var mapPolygon: org.osmdroid.views.overlay.Polygon
    private var boundingBox: Polygon? = null
        set(newValue) {
            if(newValue != null) updateBoundingBox(field, newValue)
            else clearBoundingBox()
            field = newValue
        }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_collar_detail)

        token = intent.getStringExtra("token")!!
        collarId = intent.getIntExtra("identifier", -1)

        map = findViewById(R.id.detailMap)
        mapPolygon = org.osmdroid.views.overlay.Polygon(map)
        configureMapPolygon()
    }

    private fun configureMapPolygon() {
        mapPolygon.fillPaint.color = Color.CYAN
        mapPolygon.fillPaint.alpha = 127
        mapPolygon.outlinePaint.strokeWidth = 0.0f
        mapPolygon.title = "Valid Grazing Area"
    }

    private fun updateBoundingBox(oldValue: Polygon?, polygon: Polygon) {
        if(oldValue == null) map.overlays.add(mapPolygon)
        val points = polygon.dataPoints.map { GeoPoint(it.longitude.toDouble(), it.latitude.toDouble()) }
        val polygonPoints = points.toMutableList()
        polygonPoints.add(polygonPoints[0])
        mapPolygon.points = polygonPoints
    }

    private fun clearBoundingBox() {
        map.overlays.remove(mapPolygon)
    }

    override fun onPause() {
        super.onPause()
        map.onPause()
    }

    override fun onResume() {
        super.onResume()
        map.onResume()
    }
}