package eu.ztsh.garmin.data

import com.mapbox.navigation.core.trip.session.LocationMatcherResult
import com.mapbox.navigation.core.trip.session.NavigationSessionState
import com.mapbox.navigation.tripdata.maneuver.model.Lane
import com.mapbox.navigation.tripdata.maneuver.model.Maneuver
import com.mapbox.navigation.tripdata.maneuver.model.PrimaryManeuver
import com.mapbox.navigation.tripdata.maneuver.model.StepDistance

class DataCache {

    private val garminManeuver: GarminManeuver = GarminManeuver.empty()
    private var maneuverCache: Maneuver? = null
    private var locationCache: LocationMatcherResult? = null
    private var session: NavigationSessionState? = null

    // maneuver
    fun hasChanged(guidance: Lane?): Boolean {
        return guidance != null && maneuverCache.let { it == null || it.laneGuidance != guidance }
    }

    fun hasChanged(distance: StepDistance): Boolean {
        return maneuverCache.let { it == null || it.stepDistance != distance }
    }

    fun hasChanged(primaryManeuver: PrimaryManeuver): Boolean {
        return maneuverCache.let { it == null || it.primary != primaryManeuver }
    }

    fun update(maneuver: Maneuver) {
        maneuverCache = maneuver
    }

    // location
    fun hasChanged(locationMatcherResult: LocationMatcherResult): Boolean {
        return locationCache == null || locationCache!! != locationMatcherResult
    }

    fun update(locationMatcherResult: LocationMatcherResult) {
        locationCache = locationMatcherResult
    }

    // session
    fun isActive(): Boolean {
        return session != null && session is NavigationSessionState.ActiveGuidance
    }

    fun update(sessionState: NavigationSessionState) {
        session = sessionState
    }

}