import FixePosition from "../../entities/FixePosition"
import { getDistanceAndBearing } from './getDistanceAndBearing'
import { FlightParser } from "../FlightParser"

export default class TakeoffDetection {

  TAKEOFF_MIN_SPEED = 6 // km/h
  TAKEOFF_MIN_TIME = 5000 // ms

  takeoff_lat: number | null = null
  takeoff_lng: number | null = null
  first_fixe_timestamp: number = 0

  achievedTakeoffSpeed = false
  achievedTakeoffSpeedAt = 0

  takeoff_bearing: number | null = null
  takeoff_distance: number | null = null
  takeoff_time: number | null = null
  
  processFixe(fixe: FixePosition, flightParser: FlightParser) {

    if(this.takeoff_bearing !== null) return

    if(this.takeoff_lat == null && this.takeoff_lng == null) {
      this.takeoff_lat = fixe.latitude
      this.takeoff_lng = fixe.longitude
      this.first_fixe_timestamp = fixe.timestamp
    }

    if (fixe.speed > this.TAKEOFF_MIN_SPEED) {
      this.achievedTakeoffSpeed = true
      
      if(this.achievedTakeoffSpeedAt === 0) {
        this.achievedTakeoffSpeedAt = fixe.timestamp
      }

      if (fixe.timestamp - this.achievedTakeoffSpeedAt > this.TAKEOFF_MIN_TIME) {
        const { distance, bearing } = getDistanceAndBearing(this.takeoff_lat, this.takeoff_lng, fixe.latitude, fixe.longitude)
        this.takeoff_bearing = bearing
        this.takeoff_distance = distance
        this.takeoff_time = (fixe.timestamp - this.first_fixe_timestamp) / 1000
        flightParser.takeoff_bearing = this.takeoff_bearing
      }

    } else {
      this.achievedTakeoffSpeed = false
      this.achievedTakeoffSpeedAt = 0
    }
  }



}