Bimba.git

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package ml.adamsprogs.bimba.search

import android.annotation.SuppressLint
import android.content.Context
import android.content.Intent
import android.location.Location
import android.location.LocationListener
import android.location.LocationManager
import android.os.Bundle
import android.util.Log
import android.view.View
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.WindowCompat
import androidx.recyclerview.widget.LinearLayoutManager
import com.google.openlocationcode.OpenLocationCode
import kotlinx.coroutines.*
import ml.adamsprogs.bimba.departures.DeparturesActivity
import ml.adamsprogs.bimba.api.*
import ml.adamsprogs.bimba.databinding.ActivityResultsBinding
import java.io.InputStream

@SuppressLint("MissingPermission")
class ResultsActivity : AppCompatActivity(), LocationListener {
	enum class Mode {
		MODE_LOCATION, MODE_SEARCH
	}

	private var _binding: ActivityResultsBinding? = null

	private val binding get() = _binding!!

	private lateinit var adapter: BimbaResultsAdapter

	override fun onCreate(savedInstanceState: Bundle?) {
		super.onCreate(savedInstanceState)
		_binding = ActivityResultsBinding.inflate(layoutInflater)
		setContentView(binding.root)
		binding.resultsRecycler.layoutManager = LinearLayoutManager(this)
		adapter = BimbaResultsAdapter(layoutInflater, this, listOf()) {
			when (it) {
				is Stop -> {
					val intent = Intent(this, DeparturesActivity::class.java).apply {
						putExtra("code", it.code)
						putExtra("name", it.name)
						// todo line, date, etc
					}
					startActivity(intent)
				}
				is Line -> {
					TODO("start line graph actvity")
				}
			}
		}
		binding.resultsRecycler.adapter = adapter
		setSupportActionBar(binding.topAppBar)

		WindowCompat.setDecorFitsSystemWindows(window, false)

		when (intent.extras?.get("mode")) {
			Mode.MODE_LOCATION -> {
				supportActionBar?.title = "Stops nearby"
				locate()
			}
			Mode.MODE_SEARCH -> {
				val query = intent.extras?.getString("query")!!
				supportActionBar?.title = "Results for ‘$query’"
				getItemsByQuery(query)
			}
		}
	}

	private fun locate() {  // todo also on back to this activity (onRestart?)
		val locationManager = getSystemService(Context.LOCATION_SERVICE) as LocationManager
		locationManager.requestLocationUpdates(
			LocationManager.GPS_PROVIDER, 5000, 10f, this
		)
		locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER)
			?.let { onLocationChanged(it) }
	}

	override fun onLocationChanged(location: Location) {
		Log.v("Location", "found $location")
		val code = OpenLocationCode.encode(location.latitude, location.longitude)
		val locationManager = getSystemService(Context.LOCATION_SERVICE) as LocationManager
		locationManager.removeUpdates(this)
		getItemsByLocation(code)
	}

	override fun onDestroy() {  // todo also on hide this activity (onPause?)
		super.onDestroy()
		val locationManager = getSystemService(Context.LOCATION_SERVICE) as LocationManager
		locationManager.removeUpdates(this)
	}

	private fun getItemsByQuery(query: String) {
		MainScope().launch {
			val itemsStream = queryItems(query)
			if (itemsStream == null) {
				// todo show empty state
			} else {
				updateItems(unmarshallItemResponse(itemsStream))
			}
			Log.v("RESPONSE", "getItemsByQuery")
		}
	}

	private fun getItemsByLocation(plusCode: String) {
		Log.v("RESPONSE", "getting ItemsByLocation")
		MainScope().launch {
			val itemsStream = locateItems(plusCode)
			if (itemsStream == null) {
				// todo show empty state
			} else {
				updateItems(unmarshallItemResponse(itemsStream))
			}
			Log.v("RESPONSE", "getItemsByLocation")
		}
	}

	private fun updateItems(items: List<Item>) {
		binding.resultsProgress.visibility = View.GONE
		binding.resultsRecycler.visibility = View.VISIBLE
		adapter.update(items)
	}

	private suspend fun unmarshallItemResponse(stream: InputStream): List<Item> {
		return withContext(Dispatchers.IO) {
			when (val response = ItemsResponse.unmarshall(stream)) {
				is ItemsSuccess -> {
					return@withContext response.items
				}
				else -> {
					TODO("Error response")
				}
			}
		}
	}

}