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.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.util.Log
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.snackbar.Snackbar
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.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

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

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

		viewModel.departures.observe(this) { stopDepartures ->
			updateItems(stopDepartures.departures, stopDepartures.stop)
			openBottomSheet?.departureID()?.let { adapter.get(it) }?.let { openBottomSheet?.update(it) }
		}
		viewModel.error.observe(this) {
			showError(it)
		}

		binding.collapsingLayout.apply {
			title = getName()
			val tf = ResourcesCompat.getFont(this@DeparturesActivity, R.font.yellowcircle8)
			setCollapsedTitleTypeface(tf)
			setExpandedTitleTypeface(tf)
		}

		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)
	}

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

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

	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() {
		adapter.refreshItems()
		setupSnackbar()
		viewModel.getDepartures(this, getLine())
		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 updateItems(departures: List<Departure>, stop: Stop) {
		setupSnackbar()
		binding.departuresProgress.visibility = View.GONE
		adapter.update(departures, 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] alerts
		// todo [3.2; traffic] stop info
	}
}