package ml.adamsprogs.bimba.activities

import android.content.DialogInterface
import android.content.Intent
import android.content.IntentFilter
import android.os.Build
import android.os.Bundle
import android.text.Html
import android.view.Menu
import android.view.MenuItem
import android.view.View
import android.widget.AdapterView
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity
import androidx.core.content.res.ResourcesCompat
import com.google.android.material.snackbar.Snackbar
import kotlinx.android.synthetic.main.activity_stop.*
import kotlinx.android.synthetic.main.banner.*
import ml.adamsprogs.bimba.*
import ml.adamsprogs.bimba.collections.FavouriteStorage
import ml.adamsprogs.bimba.datasources.TimetableDownloader
import ml.adamsprogs.bimba.datasources.VmService
import ml.adamsprogs.bimba.models.Departure
import ml.adamsprogs.bimba.models.Favourite
import ml.adamsprogs.bimba.models.Plate
import ml.adamsprogs.bimba.models.StopSegment
import ml.adamsprogs.bimba.models.adapters.DeparturesAdapter
import ml.adamsprogs.bimba.models.adapters.ServiceAdapter
import java.util.Calendar
import kotlin.collections.HashMap
import kotlin.collections.HashSet
import kotlin.collections.set

class StopActivity : AppCompatActivity(), MessageReceiver.OnTimetableDownloadListener, ProviderProxy.OnDeparturesReadyListener {
    companion object {
        const val EXTRA_STOP_CODE = "stopCode"
        const val EXTRA_STOP_NAME = "stopName"
        const val EXTRA_FAVOURITE = "favourite"
        const val SOURCE_TYPE = "sourceType"
        const val SOURCE_TYPE_STOP = "stop"
        const val SOURCE_TYPE_FAV = "favourite"

        const val TIMETABLE_TYPE_DEPARTURE = "timetable_type_departure"
        const val TIMETABLE_TYPE_FULL = "timetable_type_full"
    }

    private var stopCode = ""
    private var favourite: Favourite? = null
    private var timetableType = TIMETABLE_TYPE_DEPARTURE
    private val context = this
    private val receiver = MessageReceiver.getMessageReceiver()
    private lateinit var providerProxy: ProviderProxy
    private val departures = HashMap<Plate.ID, List<Departure>>()
    private val fullDepartures = HashMap<String, List<Departure>>()
    private lateinit var subscriptionId: String
    private lateinit var adapter: DeparturesAdapter


    private lateinit var sourceType: String
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_stop)

        providerProxy = ProviderProxy(this)

        sourceType = intent.getStringExtra(SOURCE_TYPE)

        setSupportActionBar(toolbar)

        when (sourceType) {
            SOURCE_TYPE_STOP -> {
                stopCode = intent.getSerializableExtra(EXTRA_STOP_CODE) as String
                supportActionBar?.title = intent.getSerializableExtra(EXTRA_STOP_NAME) as String
            }
            SOURCE_TYPE_FAV -> {
                favourite = intent.getParcelableExtra(EXTRA_FAVOURITE)
                supportActionBar?.title = favourite!!.name
            }
        }

        showFab()

        val layoutManager = androidx.recyclerview.widget.LinearLayoutManager(this)
        departuresList.addItemDecoration(androidx.recyclerview.widget.DividerItemDecoration(departuresList.context, layoutManager.orientation))
        departuresList.adapter = DeparturesAdapter(this, null, true)
        adapter = departuresList.adapter as DeparturesAdapter
        departuresList.layoutManager = layoutManager

        departuresList.addOnScrollListener(object : androidx.recyclerview.widget.RecyclerView.OnScrollListener() {
            override fun onScrollStateChanged(recyclerView: androidx.recyclerview.widget.RecyclerView, newState: Int) {}
            override fun onScrolled(recyclerView: androidx.recyclerview.widget.RecyclerView, dx: Int, dy: Int) {
                updateFabVisibility(dy)
                super.onScrolled(recyclerView, dx, dy)
            }
        })

        if (stopCode != "")
            providerProxy.getVmMessage(stopCode) { message ->
                if (message != null) {
                    val rendered =
                            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                                Html.fromHtml(message, Html.FROM_HTML_MODE_LEGACY).toString()
                            } else {
                                @Suppress("DEPRECATION")
                                Html.fromHtml(message).toString()
                            }

                    banner.visibility = View.VISIBLE
                    banner_text.text = rendered
                    banner_more.setOnClickListener {
                        AlertDialog.Builder(context)
                                .setPositiveButton(context.getText(android.R.string.ok))
                                { dialog: DialogInterface, _: Int -> dialog.cancel() }
                                .setCancelable(true)
                                .setMessage(rendered)
                                .create().show()
                    }
                }
            }

        prepareOnDownloadListener()
        subscribeForDepartures()
    }

    private fun showFab() {
        if (sourceType == SOURCE_TYPE_FAV)
            return

        val favourites = FavouriteStorage.getFavouriteStorage(context)
        if (!favourites.has(stopCode)) {
            fab.setImageDrawable(ResourcesCompat.getDrawable(context.resources, R.drawable.ic_favourite_empty, this.theme))
        }

        fab.setOnClickListener {
            if (!favourites.has(stopCode)) {
                val items = HashSet<StopSegment>()
                items.add(StopSegment(stopCode, null))
                favourites.add(stopCode, items, this@StopActivity)
                fab.setImageDrawable(ResourcesCompat.getDrawable(context.resources, R.drawable.ic_favourite, this.theme))
            } else {
                Snackbar.make(it, getString(R.string.stop_already_fav), Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show()
            }
        }
    }

    //fixme<p:5> maybe better effects
    private fun updateFabVisibility(dy: Int) {
        if (fab == null)
            return
        if (dy > 0) {
            fab.hide()
        } else {
            fab.show()
        }
    }

    private fun prepareOnDownloadListener() {
        val filter = IntentFilter(TimetableDownloader.ACTION_DOWNLOADED)
        filter.addAction(VmService.ACTION_READY)
        filter.addCategory(Intent.CATEGORY_DEFAULT)
        registerReceiver(receiver, filter)
        receiver.addOnTimetableDownloadListener(context)
    }

    private fun subscribeForDepartures() {
        subscriptionId = if (sourceType == SOURCE_TYPE_STOP) {
            providerProxy.subscribeForDepartures(stopCode, this, this)
        } else
            favourite!!.subscribeForDepartures(this, context)
    }

    override fun onDeparturesReady(departures: List<Departure>, plateId: Plate.ID?, code: Int) {
        progressBar.visibility = View.GONE
        showError(stop_layout, code, this)
        if (plateId == null) {
            this.departures.clear()
            this.departures[Plate.ID.dummy] = departures
        } else {
            this.departures.remove(Plate.ID.dummy)
            this.departures[plateId] = departures
        }
        if (timetableType == TIMETABLE_TYPE_FULL)
            return
        refreshAdapter()
        if (adapter.departures?.isEmpty() != false) {
            emptyStateIcon.visibility = View.VISIBLE
            emptyStateText.visibility = View.VISIBLE
            departuresList.visibility = View.GONE
        } else {
            emptyStateIcon.visibility = View.GONE
            emptyStateText.visibility = View.GONE
            departuresList.visibility = View.VISIBLE
        }
    }

    private fun refreshAdapter() {
        if (timetableType == TIMETABLE_TYPE_FULL) {
            @Suppress("UNCHECKED_CAST")
            adapter.departures = fullDepartures[(dateSpinner.selectedItem as ServiceAdapter.RowItem).service]
        } else {
            val now = Calendar.getInstance()
            val seconds = now.secondsAfterMidnight()
            adapter.departures = this.departures.flatMap { it.value }.sortedBy { (if (it.onStop) 0 else 1) * 172800 + it.timeTill(seconds) }  // todo sorted by also onStop
        }
        adapter.notifyDataSetChanged()
    }

    override fun onTimetableDownload(result: String?) {
        val message: String = when (result) {
            TimetableDownloader.RESULT_NO_CONNECTIVITY -> getString(R.string.no_connectivity_cant_update)
            TimetableDownloader.RESULT_UP_TO_DATE -> getString(R.string.timetable_up_to_date)
            TimetableDownloader.RESULT_FINISHED -> getString(R.string.timetable_downloaded)
            else -> getString(R.string.error_try_later)
        }
        try {
            Snackbar.make(findViewById(R.id.stop_layout), message, Snackbar.LENGTH_LONG).show()
        } catch (e: IllegalArgumentException) {
        }
        providerProxy.refreshTimetable(this)
    }

    override fun onCreateOptionsMenu(menu: Menu): Boolean {
        if (providerProxy.mode == ProviderProxy.MODE_FULL)
            menuInflater.inflate(R.menu.menu_stop, menu)
        return true
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        val id = item.itemId

        if (id == R.id.action_change_type) {
            if (timetableType == TIMETABLE_TYPE_DEPARTURE) {
                timetableType = TIMETABLE_TYPE_FULL

                item.icon = (ResourcesCompat.getDrawable(resources, R.drawable.ic_timetable_departure, this.theme))
                adapter.relativeTime = false
                if (fullDepartures.isEmpty())
                    if (sourceType == SOURCE_TYPE_STOP)
                        fullDepartures.putAll(providerProxy.getFullTimetable(stopCode))
                    else
                        fullDepartures.putAll(favourite!!.fullTimetable())

                dateSpinner.let { spinner ->
                    spinner.adapter = ServiceAdapter(this, R.layout.toolbar_spinner_item, fullDepartures.keys.map {
                        ServiceAdapter.RowItem(it, providerProxy.describeService(it, this)!!)
                    }.sorted()).apply {
                        setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
                    }
                    spinner.visibility = View.VISIBLE
                    spinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
                        override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
                            refreshAdapter()
                        }

                        override fun onNothingSelected(parent: AdapterView<*>?) {
                        }

                    }
                }

                refreshAdapter()
            } else {
                dateSpinner.visibility = View.GONE
                timetableType = TIMETABLE_TYPE_DEPARTURE
                item.icon = (ResourcesCompat.getDrawable(resources, R.drawable.ic_timetable_full, this.theme))
                adapter.relativeTime = true
                refreshAdapter()
            }
            return true
        }

        return super.onOptionsItemSelected(item)
    }

    override fun onDestroy() {
        super.onDestroy()
        receiver.removeOnTimetableDownloadListener(context)
        if (sourceType == SOURCE_TYPE_STOP)
            providerProxy.unsubscribeFromDepartures(subscriptionId, this)
        else
            favourite!!.unsubscribeFromDepartures(this)
        unregisterReceiver(receiver)
    }
}
