conventionschedule-android/app/src/main/java/com/adlerosn/brasilfurfest/schedule/SearchFilterActivity.kt

package com.adlerosn.brasilfurfest.schedule

import android.os.Bundle
import androidx.annotation.StringRes
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.LinearLayoutManager
import android.text.Editable
import android.text.TextWatcher
import com.adlerosn.brasilfurfest.R
import com.adlerosn.brasilfurfest.helper.*
import com.adlerosn.brasilfurfest.helper.observables.Observer
import com.adlerosn.brasilfurfest.schedule.managers.ScheduleManagerGetter
import com.adlerosn.brasilfurfest.schedule.abstractDataTypes.convention.FilterableNamedColoredAttribute
import com.adlerosn.brasilfurfest.schedule.abstractDataTypes.convention.Place
import com.adlerosn.brasilfurfest.schedule.abstractDataTypes.convention.Tag
import com.adlerosn.brasilfurfest.schedule.abstractDataTypes.dataholder.PeekableEvent
import com.adlerosn.brasilfurfest.schedule.adapters.FilterCriteriaRecyclerViewAdapter
import com.adlerosn.brasilfurfest.schedule.adapters.PeekableEventRecyclerViewAdapter
import com.adlerosn.brasilfurfest.schedule.adapters.TagTripleListAdapter
import kotlinx.android.synthetic.main.activity_search_filter.*
import org.jetbrains.anko.doAsync
import org.jetbrains.anko.uiThread

class SearchFilterActivity : AppCompatActivity() {
    val tags = mutableListOf<Tag>()
    val places = mutableListOf<Place>()
    var query = ""
    val scheduleManager = ScheduleManagerGetter[this]
    lateinit var filteredEventsListAdapter: PeekableEventRecyclerViewAdapter
    lateinit var filterTagsListAdapter: FilterCriteriaRecyclerViewAdapter<Tag>
    lateinit var filterPlacesListAdapter: FilterCriteriaRecyclerViewAdapter<Place>
    lateinit var everyPeekableEvent: List<PeekableEvent>
    val observer = Observer { _, _: Any? ->
        runOnUiThread {
            updateView()
        }
    }

    private val nullPair = Pair(null, nullFun)

    override fun onCreate(savedInstanceState: Bundle?) {
        ActivitiesForFragments[this.javaClass.simpleName] = this
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_search_filter)
        resourcesAliased = this.resources
        scheduleManager.addObserver(observer)
        queryText.addTextChangedListener(object: TextWatcher{
            override fun afterTextChanged(s: Editable?) {
                query = s.toString()
                updateView()
            }
            override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {}
            override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {}
        })
        val rl = recyclerList!!
        val fct = filterCriteriaTags!!
        val fcp = filterCriteriaPlaces!!
        filteredEventsListAdapter = PeekableEventRecyclerViewAdapter(mutableListOf(), scheduleManager, this) {updateView()}
        filterTagsListAdapter   = FilterCriteriaRecyclerViewAdapter( listOf() ) { callAddTags() }
        filterPlacesListAdapter = FilterCriteriaRecyclerViewAdapter( listOf() ) { callAddPlaces() }
        rl.adapter = filteredEventsListAdapter
        rl.layoutManager = LinearLayoutManager(this@SearchFilterActivity)
        everyPeekableEvent = (
                scheduleManager.convention.events.map { PeekableEvent(it) } +
                        scheduleManager.attendeeFavorites.toList().filter { it.isCustom }.map { PeekableEvent(it) }
                ).sortedWith(compareBy(
                { it.timeRange.start.timeInMillis },
                { it.timeRange.finish.timeInMillis },
                { it.title.solved }
        ))
        fct.adapter = filterTagsListAdapter
        fct.layoutManager = LinearLayoutManager(this@SearchFilterActivity, LinearLayoutManager.HORIZONTAL, false)
        fcp.adapter = filterPlacesListAdapter
        fcp.layoutManager = LinearLayoutManager(this@SearchFilterActivity, LinearLayoutManager.HORIZONTAL, false)
        updateView()
    }

    override fun onBackPressed() {
        scheduleManager.deleteObserver(observer)
        super.onBackPressed()
    }

    private fun <T: FilterableNamedColoredAttribute> callAddSomething(
            wholeCollection: Collection<T>,
            currentCollection: MutableCollection<T>,
            @StringRes dialogTitleResource: Int
    ){
        doAsync {
            val placeChoices = wholeCollection.filterNot {
                it in currentCollection
            }.map {
                Triple(it.names.solved!!, it.color, { currentCollection.add(it) })
            }
            uiThread {
                val choicesAdapted = TagTripleListAdapter(placeChoices)
                AlertDialog.Builder(this@SearchFilterActivity)
                        .setTitle(dialogTitleResource)
                        .setAdapter(choicesAdapted) { dialog, which: Int ->
                            placeChoices[which].third()
                            dialog.dismiss()
                            updateView()
                        }
                        .show()
            }
        }
    }

    fun callAddPlaces() = callAddSomething(
            scheduleManager.convention.places,
            places,
            R.string.schedule_event_key_places
    )

    fun callAddTags() = callAddSomething(
            scheduleManager.convention.tags,
            tags,
            R.string.schedule_event_key_categories
    )

    fun <T: FilterableNamedColoredAttribute> updateFilterItemView(
            wholeCollection: Collection<T>,
            currentCollection: MutableCollection<T>,
            adapter: FilterCriteriaRecyclerViewAdapter<T>
    ){
        doAsync {
            val hasPlusButtons = currentCollection.size < wholeCollection.size
            val plusButtons = if (hasPlusButtons) listOf(nullPair) else listOf()
            val filterableChoices = currentCollection.map {
                Pair(it) { currentCollection.remove(it); updateView() }
            }.let {
                when (it.size) {
                    0 -> plusButtons
                    1 -> plusButtons+it
                    else -> plusButtons+it+plusButtons
                }
            }
            uiThread {
                adapter.onDataChanged(filterableChoices)
            }
        }
    }

    fun updateView() {
        updateFilterItemView(
                scheduleManager.convention.tags,
                tags,
                filterTagsListAdapter
        )
        updateFilterItemView(
                scheduleManager.convention.places,
                places,
                filterPlacesListAdapter
        )
        doAsync {
            val toRemoveByName = if (query.isEmpty()) listOf() else
                everyPeekableEvent.filter {
                    (query.toLowerCase() !in it.title.solved?.toLowerCase()?:"")
                    &&
                    (query.toLowerCase() !in it.subtitles?.solved?.toLowerCase()?:"")
                    &&
                    (query.toLowerCase() !in it.descriptions?.solved?.toLowerCase()?:"")
                }
            val toRemoveByTag = if(tags.isEmpty()) listOf() else
                everyPeekableEvent.filter { event ->
                    !tags.any { event.tags?.contains(it) ?: false }
                }
            val toRemoveByPlace = if(places.isEmpty()) listOf() else
                everyPeekableEvent.filter { event ->
                    !places.any { event.places?.contains(it) ?: false }
                }
            val toDisplay = everyPeekableEvent - (toRemoveByName+toRemoveByTag+toRemoveByPlace).toSet()
            filteredEventsListAdapter.onDataChanged(toDisplay)
        }
    }
}