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.app.Activity
import android.content.Context
import android.content.Intent
import android.net.Uri
import android.util.Log
import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import androidx.lifecycle.ViewModel
import kotlinx.coroutines.MainScope
import kotlinx.coroutines.launch
import xyz.apiote.bimba.czwek.api.Error
import xyz.apiote.bimba.czwek.api.mapHttpError
import xyz.apiote.bimba.czwek.repo.FeedInfo
import xyz.apiote.bimba.czwek.repo.OfflineRepository
import xyz.apiote.bimba.czwek.repo.OnlineRepository
import xyz.apiote.bimba.czwek.repo.QrLocation
import xyz.apiote.bimba.czwek.repo.StopDepartures
import xyz.apiote.bimba.czwek.repo.TrafficResponseException

class DeparturesViewModel : ViewModel() {
	private val _departures = MutableLiveData<StopDepartures>()
	val departures: LiveData<StopDepartures> = _departures
	private val _error = MutableLiveData<Error>()
	val error: LiveData<Error> = _error
	var requestedItemsNumber = 12
	var allItemsRequested = false
	private var feed: FeedInfo? = null
	private lateinit var code: String

	fun getDepartures(context: Context, line: String?) {
		MainScope().launch {
			try {
				if (feed == null) {
					feed = getFeed(context)
					code = getCode(context, feed!!)
				}

				val repository = OnlineRepository()
				val stopDepartures =
					repository.getDepartures(
						feed!!.id,
						code,
						line,
						context,
						requestedItemsNumber
					)
				stopDepartures?.let {
					if (stopDepartures.departures.isEmpty()) {
						val (string, image) = mapHttpError(404)
						throw TrafficResponseException(404, "", Error(404, string, image))
					}
					_departures.value = it
				}
			} catch (e: TrafficResponseException) {
				if (!departures.isInitialized) {
					_error.value = e.error
				}
				Log.w("Departures", "$e")
			}
		}
	}

	private suspend fun getFeed(context: Context): FeedInfo {
		val intent = (context as Activity).intent
		var feeds = OfflineRepository().getFeeds(context)
		if (feeds.isNullOrEmpty()) {
			feeds = OnlineRepository().getFeeds(context)
		}
		return when (intent.action) {
			Intent.ACTION_VIEW -> {
				val feed = feeds?.values?.find { it.qrHost == intent.data?.host }
				if (feed == null) {
					if (feeds?.values?.all { it.qrIn == QrLocation.UNKNOWN } == true) {
						return getFeedOld(intent.data?.host, feeds) ?: throw TrafficResponseException(41)
					} else {
						throw TrafficResponseException(41)
					}
				} else {
					return feed
				}
			}

			null -> {
				val feedID = intent.extras?.getString("feedID")
				feeds?.get(feedID) ?: throw TrafficResponseException(41)
			}

			else -> throw TrafficResponseException(41)
		}
	}

	// TODO [after removing FeedsResponseV1] remove this method
	private fun getFeedOld(host: String?, feeds: Map<String, FeedInfo?>): FeedInfo? {
		@Suppress("SpellCheckingInspection")
		return when (host) {
			"www.peka.poznan.pl" -> feeds["poznan_ztm"]
			"rj.metropoliaztm.pl" -> feeds["gzm_ztm"]
			else -> null
		}
	}

	private fun getCode(context: Context, feed: FeedInfo): String {
		val intent = (context as Activity).intent
		return when (intent.action) {
			Intent.ACTION_VIEW -> {
				when (feed.qrIn) {
					QrLocation.QUERY -> {
						intent.data?.getQueryParameter(feed.qrSelector)
					}

					QrLocation.PATH -> {
						feed.qrSelector.toRegex().find(intent.data?.path ?: "")?.value
					}

					QrLocation.UNKNOWN -> {
						getCodeOld(intent.data)
					}

					QrLocation.NONE -> {
						throw TrafficResponseException(41)
					}
				} ?: throw TrafficResponseException(41)
			}

			null -> intent?.extras?.getString("code") ?: throw TrafficResponseException(41)
			else -> throw TrafficResponseException(41)
		}
	}

	// TODO [after removing FeedsResponseV1] remove this method
	private fun getCodeOld(data: Uri?): String {
		@Suppress("SpellCheckingInspection")
		return when (data?.host) {
			"www.peka.poznan.pl" -> data.getQueryParameter("przystanek") ?: ""
			"rj.metropoliaztm.pl" -> data.lastPathSegment ?: ""
			else -> ""
		}
	}
}