Bimba.git

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// SPDX-FileCopyrightText: Adam Evyčędo
//
// SPDX-License-Identifier: GPL-3.0-or-later

package xyz.apiote.bimba.czwek.departures

import android.content.Intent
import android.net.ConnectivityManager
import android.net.ConnectivityManager.NetworkCallback
import android.net.Network
import android.net.NetworkCapabilities
import android.net.NetworkRequest
import android.os.Build
import android.os.Bundle
import android.os.Handler
import android.os.Looper
import android.text.format.DateUtils
import android.text.format.DateUtils.MINUTE_IN_MILLIS
import android.view.View
import androidx.appcompat.app.AppCompatActivity
import androidx.appcompat.content.res.AppCompatResources
import androidx.core.content.res.ResourcesCompat
import androidx.core.view.WindowCompat
import androidx.lifecycle.ViewModelProvider
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.google.android.material.datepicker.MaterialDatePicker
import com.google.android.material.dialog.MaterialAlertDialogBuilder
import com.google.android.material.snackbar.Snackbar
import com.google.android.material.timepicker.MaterialTimePicker
import com.google.android.material.timepicker.TimeFormat
import kotlinx.coroutines.Runnable
import xyz.apiote.bimba.czwek.R
import xyz.apiote.bimba.czwek.api.Error
import xyz.apiote.bimba.czwek.databinding.ActivityDeparturesBinding
import xyz.apiote.bimba.czwek.repo.Departure
import xyz.apiote.bimba.czwek.repo.Stop
import java.time.Instant
import java.time.LocalDate
import java.time.LocalTime
import java.time.ZoneId
import java.time.ZonedDateTime

class DeparturesActivity : AppCompatActivity() {
	private var _binding: ActivityDeparturesBinding? = null
	private val binding get() = _binding!!

	private lateinit var adapter: BimbaDeparturesAdapter

	private val handler = Handler(Looper.getMainLooper())
	private var runnable = Runnable {}

	private var openBottomSheet: DepartureBottomSheet? = null
	private lateinit var snackbar: Snackbar

	private lateinit var viewModel: DeparturesViewModel

	private val datePicker =
		MaterialDatePicker.Builder.datePicker().setTitleText(R.string.title_select_date)
			.setNegativeButtonText(R.string.clear_date_selection)
			.build()
	private var timePickerStart: MaterialTimePicker? = null
	private var timePickerEnd: MaterialTimePicker? = null
	private var linePicker: MaterialAlertDialogBuilder? = null
	private var date: LocalDate? = null
	private val linesFilter = mutableMapOf<String, Boolean>()
	private val linesFilterTemporary = mutableMapOf<String, Boolean>()
	private var startTime: LocalTime = LocalTime.MIN
	private var endTime: LocalTime = LocalTime.MAX
	private var alertDescriptions: String = ""

	override fun onCreate(savedInstanceState: Bundle?) {
		super.onCreate(savedInstanceState)
		_binding = ActivityDeparturesBinding.inflate(layoutInflater)
		setContentView(binding.root)

		viewModel = ViewModelProvider(this)[DeparturesViewModel::class.java]

		linePicker = MaterialAlertDialogBuilder(this)
			.setTitle(resources.getString(R.string.title_select_line))
			.setNegativeButton(R.string.clear_date_selection) { _, _ ->
				linesFilter.clear()
				getDepartures()
			}
			.setPositiveButton(R.string.ok) { _, _ ->
				linesFilterTemporary.forEach { linesFilter[it.key] = it.value }
				getDepartures()
			}

		binding.moreButton.setOnClickListener {
			MaterialAlertDialogBuilder(this)
				.setTitle("Alerts")
				.setPositiveButton(R.string.ok) { _, _ -> }
				.setMessage(alertDescriptions)
				.show()
		}

		viewModel.departures.observe(this) { stopDepartures ->
			if (stopDepartures.alerts.isNotEmpty()) {
				binding.alerts.visibility = View.VISIBLE
				binding.alertsText.text = stopDepartures.alerts.map {
					it.header.ifEmpty {
						getString(R.string.alert_header)
					}
				}.toSet().joinToString(separator = "\n")
				alertDescriptions = stopDepartures.alerts.map { it.description }.filter { it != "" }
					.joinToString(separator = "\n")
				binding.moreButton.visibility = if (alertDescriptions == "") View.GONE else View.VISIBLE

			} else {
				binding.alerts.visibility = View.GONE
			}
			updateItems(
				stopDepartures.departures
					.filter { d ->
						linesFilter.values.all { !it } or (linesFilter[d.vehicle.Line.name] ?: false)
					}
					.filter { d ->
						val t = LocalTime.of(d.time.Hour.toInt(), d.time.Minute.toInt())
						t >= startTime && t <= endTime
					},
				stopDepartures.stop
			)
			openBottomSheet?.departureID()?.let { adapter.get(it) }?.let { openBottomSheet?.update(it) }

			val lines = stopDepartures.departures.map { it.vehicle.Line.name }.sortedWith { s1, s2 ->
				val s1n = s1.toIntOrNull()
				val s2n = s2.toIntOrNull()
				if (s1n != null && s2n != null) {
					s1.toInt() - s2.toInt()
				} else {
					s1.compareTo(s2)
				}
			}.toSet().toTypedArray()
			val selections = lines.map { linesFilter.getOrDefault(it, false) }.toBooleanArray()

			linePicker?.setMultiChoiceItems(lines, selections) { _, which, checked ->
				linesFilterTemporary[lines[which]] = checked
			}
		}
		viewModel.error.observe(this) {
			showError(it)
		}

		binding.departuresAppBar.menu.findItem(R.id.departures_filter_bytime).setEnabled(false)


		datePicker.addOnNegativeButtonClickListener {
			date = null
			startTime = LocalTime.MIN
			endTime = LocalTime.MAX
			binding.departuresAppBar.menu.findItem(R.id.departures_filter_bytime).setEnabled(false)
			getDepartures(true)
		}
		datePicker.addOnPositiveButtonClickListener {
			if (date == null) {
				startTime = LocalTime.MIN
				endTime = LocalTime.MAX
			}
			date = Instant.ofEpochMilli(it).atZone(ZoneId.systemDefault())
				.toLocalDate()
			binding.departuresAppBar.menu.findItem(R.id.departures_filter_bytime).setEnabled(true)
			getDepartures(true)
		}

		binding.collapsingLayout.apply {
			title = getName()
			val tf = ResourcesCompat.getFont(this@DeparturesActivity, R.font.yellowcircle8)
			setCollapsedTitleTypeface(tf)
			setExpandedTitleTypeface(tf)
		}
		binding.departuresAppBar.setOnMenuItemClickListener {
			when (it.itemId) {
				R.id.departures_calendar -> {
					datePicker.show(supportFragmentManager, "datePicker")
					true
				}

				R.id.departures_filter_byline -> {
					linesFilterTemporary.clear()
					linesFilter.forEach { filter -> linesFilterTemporary[filter.key] = filter.value }
					linePicker?.show()
					true
				}

				R.id.departures_filter_bytime -> {
					timePickerStart =
						MaterialTimePicker.Builder().setTitleText(R.string.title_select_time_start)
							.setTimeFormat(TimeFormat.CLOCK_24H)
							.setHour(startTime.hour)
							.setMinute(startTime.minute)
							.setNegativeButtonText(R.string.clear_date_selection)
							.build()
					timePickerEnd = MaterialTimePicker.Builder().setTitleText(R.string.title_select_time_end)
						.setTimeFormat(TimeFormat.CLOCK_24H)
						.setHour(endTime.hour)
						.setMinute(endTime.minute)
						.setNegativeButtonText(R.string.clear_date_selection)
						.build()
					timePickerEnd!!.addOnPositiveButtonClickListener {
						endTime = LocalTime.of(timePickerEnd!!.hour, timePickerEnd!!.minute)
						getDepartures(true)
					}
					timePickerEnd!!.addOnNegativeButtonClickListener {
						endTime = LocalTime.MAX
						getDepartures(true)
					}
					timePickerStart!!.addOnPositiveButtonClickListener {
						startTime = LocalTime.of(timePickerStart!!.hour, timePickerStart!!.minute)
						timePickerEnd!!.show(supportFragmentManager, "timePickerEnd")
					}
					timePickerStart!!.addOnNegativeButtonClickListener {
						startTime = LocalTime.MIN
						timePickerEnd!!.show(supportFragmentManager, "timePickerEnd")
					}
					timePickerStart!!.show(supportFragmentManager, "timePickerStart")
					true
				}

				else -> super.onOptionsItemSelected(it)
			}
		}

		binding.departuresRecycler.layoutManager = LinearLayoutManager(this)
		binding.departuresRecycler.addOnScrollListener(
			object : RecyclerView.OnScrollListener() {
				override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
					super.onScrolled(recyclerView, dx, dy)
					val llm = binding.departuresRecycler.layoutManager as LinearLayoutManager
					val dataLength = adapter.itemCount
					if (llm.findLastCompletelyVisibleItemPosition() == dataLength - 1) {
						if (!viewModel.allItemsRequested) {
							viewModel.requestedItemsNumber += 12
							getDepartures()
						}
					}
				}
			}
		)
		adapter = BimbaDeparturesAdapter(layoutInflater, this, listOf()) {
			DepartureBottomSheet(it).apply {
				show(supportFragmentManager, DepartureBottomSheet.TAG)
				openBottomSheet = this
				setOnCancel { openBottomSheet = null }
			}
		}
		binding.departuresRecycler.adapter = adapter
		WindowCompat.setDecorFitsSystemWindows(window, false)

		snackbar = Snackbar.make(binding.root, "", Snackbar.LENGTH_INDEFINITE)

		val networkCallback: NetworkCallback = object : NetworkCallback() {
			override fun onAvailable(network: Network) {
				getDepartures()
			}

			override fun onLost(network: Network) {
			}
		}

		val connectivityManager = getSystemService(CONNECTIVITY_SERVICE) as ConnectivityManager

		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
			connectivityManager.registerDefaultNetworkCallback(networkCallback)
		} else {
			val request = NetworkRequest.Builder()
				.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET).build()
			connectivityManager.registerNetworkCallback(request, networkCallback)
		}
	}

	override fun onStart() {
		super.onStart()
		linesFilter.clear()
		getLine()?.let {
			linesFilter[it] = true
		}
	}

	override fun onResume() {
		super.onResume()
		getDepartures()
	}

	override fun onPause() {
		super.onPause()
		handler.removeCallbacks(runnable)
	}

	override fun onStop() {
		super.onStop()
		handler.removeCallbacks(runnable)
		handler.removeCallbacksAndMessages(null)
	}

	private fun getName(): String {
		return when (intent?.action) {
			Intent.ACTION_VIEW -> getString(R.string.stop_from_qr_code)
			null -> intent?.extras?.getString("name") ?: ""
			else -> ""
		}
	}

	private fun getLine(): String? {
		return when (intent?.action) {
			null -> intent?.extras?.getString("line")
			else -> null
		}
	}

	fun getDepartures(force: Boolean = false) {
		if (force) {
			showLoading()
		} else {
			adapter.refreshItems()
			setupSnackbar()
		}
		viewModel.getDepartures(this, date, force)
		handler.removeCallbacks(runnable)
		runnable = Runnable { getDepartures() }
		handler.postDelayed(runnable, 30 * 1000)
	}

	private fun setupSnackbar() {
		val lastUpdateAgo = ZonedDateTime.now().toEpochSecond() - adapter.lastUpdate.toEpochSecond()
		if (lastUpdateAgo > 59 && adapter.lastUpdate.year != 0) {
			snackbar.setText(
				getString(
					R.string.departures_snackbar,
					DateUtils.getRelativeTimeSpanString(
						adapter.lastUpdate.toEpochSecond() * 1000,
						ZonedDateTime.now().toEpochSecond() * 1000,
						MINUTE_IN_MILLIS,
						DateUtils.FORMAT_ABBREV_RELATIVE
					)
				)
			).show()
		} else {
			snackbar.dismiss()
		}
	}

	private fun showError(error: Error) {
		binding.departuresProgress.visibility = View.GONE
		binding.departuresRecycler.visibility = View.GONE
		binding.errorImage.visibility = View.VISIBLE
		binding.errorText.visibility = View.VISIBLE

		binding.errorText.text = getString(error.stringResource)
		binding.errorImage.setImageDrawable(
			AppCompatResources.getDrawable(
				this,
				error.imageResource
			)
		)
	}

	private fun showLoading() {
		binding.departuresOverlay.visibility = View.VISIBLE
		binding.departuresProgress.visibility = View.VISIBLE
		binding.departuresRecycler.visibility = View.GONE
		binding.errorImage.visibility = View.GONE
		binding.errorText.visibility = View.GONE
	}

	private fun updateItems(departures: List<Departure>, stop: Stop) {
		setupSnackbar()
		binding.departuresProgress.visibility = View.GONE
		adapter.update(departures, date != null, true)
		binding.collapsingLayout.apply {
			title = stop.name
		}
		if (departures.isEmpty()) {
			binding.errorImage.visibility = View.VISIBLE
			binding.errorText.visibility = View.VISIBLE
			binding.departuresRecycler.visibility = View.GONE

			binding.errorText.text = getString(R.string.no_departures)
			binding.errorImage.setImageDrawable(
				AppCompatResources.getDrawable(
					this, R.drawable.error_search
				)
			)
		} else {
			if (departures.size < viewModel.requestedItemsNumber) {
				viewModel.allItemsRequested = true
			}
			binding.departuresOverlay.visibility = View.GONE
			binding.errorImage.visibility = View.GONE
			binding.errorText.visibility = View.GONE
			binding.departuresRecycler.visibility = View.VISIBLE
		}
		// todo [3.2; traffic] stop info
	}
}