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.CountDownTimer
import android.text.format.DateUtils
import android.text.format.DateUtils.MINUTE_IN_MILLIS
import android.view.View
import android.widget.Toast
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
import androidx.appcompat.content.res.AppCompatResources
import androidx.core.content.res.ResourcesCompat
import androidx.core.view.ViewCompat
import androidx.core.view.WindowCompat
import androidx.core.view.WindowInsetsCompat
import androidx.core.view.updatePadding
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.MainScope
import kotlinx.coroutines.launch
import kotlinx.coroutines.runBlocking
import xyz.apiote.bimba.czwek.R
import xyz.apiote.bimba.czwek.api.Error
import xyz.apiote.bimba.czwek.api.Server
import xyz.apiote.bimba.czwek.databinding.ActivityDeparturesBinding
import xyz.apiote.bimba.czwek.repo.DepartureItem
import xyz.apiote.bimba.czwek.repo.Favourite
import xyz.apiote.bimba.czwek.repo.OfflineRepository
import xyz.apiote.bimba.czwek.repo.Stop
import xyz.apiote.bimba.czwek.units.Second
import xyz.apiote.bimba.czwek.units.Tim
import java.time.Instant
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 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 val linesFilterTemporary = mutableMapOf<String, Boolean>()

	// TODO [elizabeth] millisInFuture from header Cache-Control max-age
	private val countdown =
		object : CountDownTimer(Second(30).milliseconds(), Tim(1).milliseconds()) {
			override fun onTick(millisUntilFinished: Long) {
				val timsUntillFinished = Tim(Second(millisUntilFinished.toDouble()/1000))
				binding.departuresUpdatesProgress.progress = timsUntillFinished.tims.toInt()
			}

			override fun onFinish() {
				getDepartures()
			}
		}

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

		ViewCompat.setOnApplyWindowInsetsListener(binding.departuresRecycler) { v, windowInsets ->
			windowInsets.displayCutout?.safeInsetRight?.let { v.updatePadding(right = it) }
			windowInsets.displayCutout?.safeInsetLeft?.let { v.updatePadding(left = it) }
			val insets = windowInsets.getInsets(WindowInsetsCompat.Type.systemBars())
			v.updatePadding(bottom = insets.bottom)
			WindowInsetsCompat.CONSUMED
		}
		ViewCompat.setOnApplyWindowInsetsListener(binding.root) { v, windowInsets ->
			val insets = windowInsets.getInsets(WindowInsetsCompat.Type.systemBars())
			v.updatePadding(right = insets.right, left = insets.left)
			windowInsets
		}

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

		getLine()?.let {
			viewModel.mutableLinesFilter.value = mapOf(Pair(it, true))
		}

		getLines()?.associate { Pair(it, true) }?.let {
			if (it.isNotEmpty()) {
				viewModel.mutableLinesFilter.value = it
			}
		}

		linePicker = MaterialAlertDialogBuilder(this)
			.setTitle(resources.getString(R.string.title_select_line))
			.setNegativeButton(R.string.clear_date_selection) { _, _ ->
				viewModel.mutableLinesFilter.value = emptyMap()
				//getDepartures()
			}
			.setPositiveButton(R.string.ok) { _, _ ->
				viewModel.mutableLinesFilter.value = emptyMap()
				viewModel.mutableLinesFilter.value = linesFilterTemporary
				//getDepartures()
			}

		viewModel.linesFilter.observe(this) {
			// TODO if is before we got departures, do nothing
			val departures = viewModel.departures.value?.departures ?: emptyList()
			updateItems(departures
				.filter { d ->
					it.values.all { !it } or (it[d.vehicle.Line.name] ?: false)
				}
				.filter { d ->
					val t = LocalTime.of(d.time.Hour.toInt(), d.time.Minute.toInt())
					t >= viewModel.startTime && t <= viewModel.endTime
				}.map { DepartureItem(it) },
				null,
				true
			)
		}

		viewModel.departures.observe(this) { stopDepartures ->
			val items = mutableListOf<DepartureItem>()
			if (stopDepartures.alerts.isNotEmpty()) {
				items.add(DepartureItem(stopDepartures.alerts))
			}
			items.addAll(stopDepartures.departures
				.filter { d ->
					viewModel.linesFilter.value?.let { filter ->
						filter.values.all { !it } or (filter[d.vehicle.Line.name] ?: false)
					} ?: true
				}
				.filter { d ->
					val t = LocalTime.of(d.time.Hour.toInt(), d.time.Minute.toInt())
					t >= viewModel.startTime && t <= viewModel.endTime
				}.map { DepartureItem(it) })
			updateItems(items, stopDepartures.stop)
			viewModel.openBottomSheet?.departureID()?.let { adapter.get(it) }
				?.let { it.departure?.let { departure -> viewModel.openBottomSheet?.update(departure) } }


			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 { viewModel.linesFilter.value?.getOrDefault(it, false) ?: 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)

		// TODO async esp. with Online
		if (runBlocking {
				val repository = OfflineRepository(this@DeparturesActivity)
				val f = repository.getFavourite(
					getCode() ?: ""
				)
				repository.close()
				f
			} != null) {
			binding.departuresAppBar.menu.findItem(R.id.favourite).setIcon(R.drawable.favourite_full)
		}

		datePicker.addOnNegativeButtonClickListener {
			viewModel.date = null
			viewModel.startTime = LocalTime.MIN
			viewModel.endTime = LocalTime.MAX
			binding.departuresAppBar.menu.findItem(R.id.departures_filter_bytime).setEnabled(false)
			getDepartures(true)
		}
		datePicker.addOnPositiveButtonClickListener {
			if (viewModel.date == null) {
				viewModel.startTime = LocalTime.MIN
				viewModel.endTime = LocalTime.MAX
			}
			viewModel.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.favourite -> {
					if (!viewModel.linesFilter.value.isNullOrEmpty() && viewModel.linesFilter.value!!.any { filter -> filter.value }) {
						MaterialAlertDialogBuilder(this).setIcon(
							AppCompatResources.getDrawable(
								this,
								R.drawable.filter
							)
						)
							.setTitle("Filtered departures")
							.setMessage(R.string.filtered_stop_question)
							.setPositiveButton(R.string.filtered) { _, _ ->
								saveFavourite(viewModel.linesFilter.value!!.keys)
							}
							.setNegativeButton(R.string.unfiltered) { _, _ ->
								saveFavourite(setOf())
							}
							.setNeutralButton(R.string.cancel) { _, _ -> }
							.show()
					} else {
						saveFavourite(setOf())
					}
					true
				}

				R.id.departures_calendar -> {
					datePicker.show(supportFragmentManager, "datePicker")
					true
				}

				R.id.departures_filter_byline -> {
					linesFilterTemporary.clear()
					viewModel.linesFilter.value?.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(viewModel.startTime.hour)
							.setMinute(viewModel.startTime.minute)
							.setNegativeButtonText(R.string.clear_date_selection)
							.build()
					timePickerEnd = MaterialTimePicker.Builder().setTitleText(R.string.title_select_time_end)
						.setTimeFormat(TimeFormat.CLOCK_24H)
						.setHour(viewModel.endTime.hour)
						.setMinute(viewModel.endTime.minute)
						.setNegativeButtonText(R.string.clear_date_selection)
						.build()
					timePickerEnd!!.addOnPositiveButtonClickListener {
						viewModel.endTime = LocalTime.of(timePickerEnd!!.hour, timePickerEnd!!.minute)
						getDepartures(true)
					}
					timePickerEnd!!.addOnNegativeButtonClickListener {
						viewModel.endTime = LocalTime.MAX
						getDepartures(true)
					}
					timePickerStart!!.addOnPositiveButtonClickListener {
						viewModel.startTime = LocalTime.of(timePickerStart!!.hour, timePickerStart!!.minute)
						timePickerEnd!!.show(supportFragmentManager, "timePickerEnd")
					}
					timePickerStart!!.addOnNegativeButtonClickListener {
						viewModel.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)
				viewModel.openBottomSheet = this
				setOnCancel { viewModel.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 onResume() {
		super.onResume()
		getDepartures()
		viewModel.openBottomSheet?.show(supportFragmentManager, DepartureBottomSheet.TAG)
	}

	override fun onPause() {
		viewModel.openBottomSheet?.dismiss()
		super.onPause()
		countdown.cancel()
	}

	override fun onStop() {
		super.onStop()
		countdown.cancel()
	}

	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
		}
	}

	private fun getLines(): List<String>? {
		return when (intent?.action) {
			null -> intent?.extras?.getStringArray("linesFilter")?.toList()
			else -> null
		}
	}

	private fun getCode() = intent?.extras?.getString("code")

	fun getDepartures(force: Boolean = false) {
		binding.departuresUpdatesProgress.isIndeterminate = true
		if (force) {
			showLoading()
		} else {
			adapter.refreshItems()
			setupSnackbar()
		}
		viewModel.getDepartures(this, viewModel.date, force)
	}

	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.departuresUpdatesProgress.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.errorImage.visibility = View.GONE
		binding.errorText.visibility = View.GONE
	}

	private fun updateItems(
		departures: List<DepartureItem>,
		stop: Stop?,
		leaveAlert: Boolean = false
	) {
		setupSnackbar()
		binding.departuresRecycler.scrollToPosition(0)
		binding.departuresProgress.visibility = View.GONE
		// TODO [elizabeth] max, progress from header Cache-Control max-age
		binding.departuresUpdatesProgress.apply {
			visibility = View.VISIBLE
			isIndeterminate = false
			max = Tim(Second(30)).tims.toInt()
			progress = Tim(Second(30)).tims.toInt()
		}
		countdown.cancel()
		countdown.start()
		adapter.update(departures, viewModel.date != null, true, leaveAlert)
		binding.collapsingLayout.apply {
			stop?.let { title = it.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
	}

	private fun saveFavourite(linesFilter: Set<String>) {
		val context = this
		val feedID = intent.extras?.getString("feedID")
		val code = intent?.extras?.getString("code")
		if (feedID == null || code == null) {
			Toast.makeText(this, R.string.cannot_save_favourite, Toast.LENGTH_LONG).show()
			return
		}
		binding.departuresAppBar.menu.findItem(R.id.favourite).setIcon(R.drawable.favourite_full)
		MainScope().launch {
			val repo = OfflineRepository(context)
			val feedName = repo.getFeeds(context, Server.get(context))?.get(feedID)?.name
			if (feedName == null) {
				Toast.makeText(context, R.string.cannot_save_favourite, Toast.LENGTH_LONG).show()
				return@launch
			}
			val favourite = (repo.getFavourite(code) ?: Favourite(
				null,
				feedID,
				feedName,
				code,
				getName(),
				linesFilter.toList()
			)).copy(lines = linesFilter.toList())
			repo.saveFavourite(favourite)
			repo.close()
		}
	}
}