package com.schafer.tracker

import com.beust.klaxon.Klaxon
import java.net.URL
import kotlin.math.abs

class airplaneTracker() {
    init {
        val apiResponse = URL("https://opensky-network.org/api/states/all").readText()
        val data = Klaxon()
            .parse<data>(
                apiResponse
            )
        val jsonData = listOf(data!!.states)
        var lowDist = 0.0
        for (x in jsonData) {
            if (x[2] == "United States") {
                val lat = x[5].toString().toDouble()
                val long = x[6].toString().toDouble()
                val R = 6371 // Radius of the earth

                val latDistance = Math.toRadians(lat -  41.661129)
                val lonDistance = Math.toRadians(long -  -91.530167)
                val a =
                    Math.sin(latDistance / 2) * Math.sin(latDistance / 2) + (Math.cos(Math.toRadians(41.661129)) * Math.cos(
                        Math.toRadians(long)
                    )
                            * Math.sin(lonDistance / 2) * Math.sin(lonDistance / 2))
                val c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a))
                var distance = R.toDouble() * c * 1000.0 // convert to meters

                val height = abs(204 - x[7].toString().toInt()).toDouble()

                distance = Math.pow(distance, 2.0) + Math.pow(height, 2.0)

                distance = Math.sqrt(distance)

                if (distance <= lowDist || lowDist == 0.0) {
                    lowDist = distance
                }
            }
        }
        println(lowDist)
    }



    companion object {
        @JvmStatic public fun main(args: Array<String>) {
            airplaneTracker()
        }
    }
}