/*
 * Garmin HUD Companion Application
 * Copyright (C) 2022 Piotr Dec / ztsh.eu
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package eu.ztsh.garmin.mapbox

import android.content.res.Configuration
import android.content.res.Resources
import android.view.View
import androidx.appcompat.app.AppCompatActivity
import com.mapbox.geojson.Point
import com.mapbox.maps.ImageHolder
import com.mapbox.maps.plugin.LocationPuck2D
import com.mapbox.maps.plugin.animation.camera
import com.mapbox.maps.plugin.locationcomponent.location
import com.mapbox.navigation.base.options.NavigationOptions
import com.mapbox.navigation.core.MapboxNavigation
import com.mapbox.navigation.core.directions.session.RoutesObserver
import com.mapbox.navigation.core.lifecycle.MapboxNavigationApp
import com.mapbox.navigation.core.lifecycle.MapboxNavigationObserver
import com.mapbox.navigation.core.trip.session.LocationObserver
import com.mapbox.navigation.core.trip.session.RouteProgressObserver
import com.mapbox.navigation.core.trip.session.VoiceInstructionsObserver
import com.mapbox.navigation.ui.maps.camera.NavigationCamera
import com.mapbox.navigation.ui.maps.camera.data.MapboxNavigationViewportDataSource
import com.mapbox.navigation.ui.maps.camera.lifecycle.NavigationBasicGesturesHandler
import com.mapbox.navigation.ui.maps.camera.state.NavigationCameraState
import com.mapbox.navigation.ui.maps.location.NavigationLocationProvider
import eu.ztsh.garmin.MainActivity
import eu.ztsh.garmin.UI
import eu.ztsh.garmin.mock.ReplayResources

class MapControl(
    val context: AppCompatActivity,
    val ui: UI,
    private val resources: Resources
) : MapboxNavigationObserver {

    /**
     * Used to execute camera transitions based on the data generated by the [viewportDataSource].
     * This includes transitions from route overview to route following and continuously updating the camera as the location changes.
     */
    lateinit var navigationCamera: NavigationCamera

    /**
     * Produces the camera frames based on the location and routing data for the [navigationCamera] to execute.
     */
    lateinit var viewportDataSource: MapboxNavigationViewportDataSource

    /**
     * [NavigationLocationProvider] is a utility class that helps to provide location updates generated by the Navigation SDK
     * to the Maps SDK in order to update the user location indicator on the map.
     */
    val navigationLocationProvider = NavigationLocationProvider()

    val navigationStatusControl = NavigationStatusControl()

    val tripControl = TripControl(this, TripMode.GPS)

    // Observers
    private lateinit var routeControl: RouteControl
    private lateinit var voiceControl: VoiceControl

    private lateinit var routesObserver: RoutesObserver
    private lateinit var locationObserver: LocationObserver
    private lateinit var routeProgressObserver: RouteProgressObserver
    private lateinit var voiceInstructionsObserver: VoiceInstructionsObserver
    private val searchControl = SearchControl(this, ui)

    fun init() {
        viewportDataSource = MapboxNavigationViewportDataSource(ui.mapView.mapboxMap)
        if (this.resources.configuration.orientation == Configuration.ORIENTATION_LANDSCAPE) {
            viewportDataSource.overviewPadding = UI.landscapeOverviewPadding
        } else {
            viewportDataSource.overviewPadding = UI.overviewPadding
        }
        if (this.resources.configuration.orientation == Configuration.ORIENTATION_LANDSCAPE) {
            viewportDataSource.followingPadding = UI.landscapeFollowingPadding
        } else {
            viewportDataSource.followingPadding = UI.followingPadding
        }

        navigationCamera = NavigationCamera(
            ui.mapView.mapboxMap,
            ui.mapView.camera,
            viewportDataSource
        )
        // set the animations lifecycle listener to ensure the NavigationCamera stops
        // automatically following the user location when the map is interacted with
        ui.mapView.camera.addCameraAnimationsLifecycleListener(
            NavigationBasicGesturesHandler(navigationCamera)
        )
        navigationCamera.registerNavigationCameraStateChangeObserver { navigationCameraState ->
            // shows/hide the recenter button depending on the camera state
            when (navigationCameraState) {
                NavigationCameraState.TRANSITION_TO_FOLLOWING,
                NavigationCameraState.FOLLOWING -> ui.recenter.visibility = View.INVISIBLE

                NavigationCameraState.TRANSITION_TO_OVERVIEW,
                NavigationCameraState.OVERVIEW,
                NavigationCameraState.IDLE -> ui.recenter.visibility = View.VISIBLE
            }
        }

        routeControl = RouteControl(this, ui, context)
        voiceControl = VoiceControl(ui, context)

        routesObserver = routeControl.routesObserver
        locationObserver = LocationObserver(this)
        routeProgressObserver = routeControl.routeProgressObserver
        voiceInstructionsObserver = voiceControl.voiceInstructionsObserver
    }

    fun routeToPoint(point: Point) {
        routeControl.findRoute(point)
    }

    fun initNavigation() {
        MapboxNavigationApp.setup(
            NavigationOptions.Builder(context)
                .build()
        )

        // initialize location puck
        ui.mapView.location.apply {
            setLocationProvider(navigationLocationProvider)
            this.locationPuck = LocationPuck2D(
                bearingImage = ImageHolder.Companion.from(
                    com.mapbox.navigation.ui.maps.R.drawable.mapbox_navigation_puck_icon
                )
            )
            puckBearingEnabled = true
            enabled = true
        }

        tripControl.initLocation()
    }

    fun mapboxNavigation(): MapboxNavigation {
        return (context as MainActivity).mapboxNavigation
    }

    override fun onAttached(mapboxNavigation: MapboxNavigation) {
        mapboxNavigation.registerRoutesObserver(routesObserver)
        mapboxNavigation.registerLocationObserver(locationObserver)
        mapboxNavigation.registerRouteProgressObserver(routeProgressObserver)
        mapboxNavigation.registerVoiceInstructionsObserver(voiceInstructionsObserver)

        navigationStatusControl.registerObserver(searchControl)

        tripControl.onAttached(mapboxNavigation)
    }

    override fun onDetached(mapboxNavigation: MapboxNavigation) {
        mapboxNavigation.unregisterRoutesObserver(routesObserver)
        mapboxNavigation.unregisterLocationObserver(locationObserver)
        mapboxNavigation.unregisterRouteProgressObserver(routeProgressObserver)
        mapboxNavigation.unregisterVoiceInstructionsObserver(voiceInstructionsObserver)

        navigationStatusControl.unregisterObserver(searchControl)

        tripControl.onDetached(mapboxNavigation)
    }

    fun onDestroy() {
        routeControl.cancel()
        voiceControl.cancel()
    }

    companion object {

        const val TAG = "MAPCTRL"

    }
}