package org.moire.ultrasonic.fragment

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.AdapterView
import android.widget.AdapterView.OnItemClickListener
import android.widget.ListView
import android.widget.TextView
import androidx.fragment.app.Fragment
import androidx.navigation.Navigation
import java.util.Locale
import org.koin.core.component.KoinComponent
import org.koin.core.component.inject
import org.moire.ultrasonic.R
import org.moire.ultrasonic.data.ActiveServerProvider
import org.moire.ultrasonic.data.ActiveServerProvider.Companion.isOffline
import org.moire.ultrasonic.util.Constants
import org.moire.ultrasonic.util.MergeAdapter
import org.moire.ultrasonic.util.Util.applyTheme
import org.moire.ultrasonic.util.Util.getMaxAlbums
import org.moire.ultrasonic.util.Util.getMaxSongs
import org.moire.ultrasonic.util.Util.getShouldUseId3Tags

/**
 * Displays the Main screen of Ultrasonic, where the music library can be browsed
 */
class MainFragment : Fragment(), KoinComponent {
    private var list: ListView? = null

    private lateinit var serverButton: View
    private lateinit var serverTextView: TextView
    private lateinit var musicTitle: View
    private lateinit var artistsButton: View
    private lateinit var albumsButton: View
    private lateinit var genresButton: View
    private lateinit var videosTitle: View
    private lateinit var songsTitle: View
    private lateinit var randomSongsButton: View
    private lateinit var songsStarredButton: View
    private lateinit var albumsTitle: View
    private lateinit var albumsNewestButton: View
    private lateinit var albumsRandomButton: View
    private lateinit var albumsHighestButton: View
    private lateinit var albumsStarredButton: View
    private lateinit var albumsRecentButton: View
    private lateinit var albumsFrequentButton: View
    private lateinit var albumsAlphaByNameButton: View
    private lateinit var albumsAlphaByArtistButton: View
    private lateinit var videosButton: View

    private val activeServerProvider: ActiveServerProvider by inject()

    override fun onCreate(savedInstanceState: Bundle?) {
        applyTheme(this.context)
        super.onCreate(savedInstanceState)
    }

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return inflater.inflate(R.layout.main, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        list = view.findViewById(R.id.main_list)
        cachedActiveServerProperties = getActiveServerProperties()

        setupButtons()

        if (list != null) setupMenuList(list!!)

        super.onViewCreated(view, savedInstanceState)
    }

    override fun onResume() {
        super.onResume()
        var shouldRestart = false
        val currentId3Setting = getShouldUseId3Tags()
        val currentActiveServerProperties = getActiveServerProperties()

        // If setting has changed...
        if (currentId3Setting != shouldUseId3) {
            shouldUseId3 = currentId3Setting
            shouldRestart = true
        }

        // or the server has changed...
        if (currentActiveServerProperties != cachedActiveServerProperties) {
            cachedActiveServerProperties = currentActiveServerProperties
            shouldRestart = true
        }

        // then setup the list anew.
        if (shouldRestart) {
            if (list != null) setupMenuList(list!!)
        }
    }

    private fun setupButtons() {
        val buttons = layoutInflater.inflate(R.layout.main_buttons, list, false)
        serverButton = buttons.findViewById(R.id.main_select_server)
        serverTextView = serverButton.findViewById(R.id.main_select_server_2)
        musicTitle = buttons.findViewById(R.id.main_music)
        artistsButton = buttons.findViewById(R.id.main_artists_button)
        albumsButton = buttons.findViewById(R.id.main_albums_button)
        genresButton = buttons.findViewById(R.id.main_genres_button)
        videosTitle = buttons.findViewById(R.id.main_videos_title)
        songsTitle = buttons.findViewById(R.id.main_songs)
        randomSongsButton = buttons.findViewById(R.id.main_songs_button)
        songsStarredButton = buttons.findViewById(R.id.main_songs_starred)
        albumsTitle = buttons.findViewById(R.id.main_albums)
        albumsNewestButton = buttons.findViewById(R.id.main_albums_newest)
        albumsRandomButton = buttons.findViewById(R.id.main_albums_random)
        albumsHighestButton = buttons.findViewById(R.id.main_albums_highest)
        albumsStarredButton = buttons.findViewById(R.id.main_albums_starred)
        albumsRecentButton = buttons.findViewById(R.id.main_albums_recent)
        albumsFrequentButton = buttons.findViewById(R.id.main_albums_frequent)
        albumsAlphaByNameButton = buttons.findViewById(R.id.main_albums_alphaByName)
        albumsAlphaByArtistButton = buttons.findViewById(R.id.main_albums_alphaByArtist)
        videosButton = buttons.findViewById(R.id.main_videos)
    }

    private fun setupMenuList(list: ListView) {
        // Set title
        val activeServerName = activeServerProvider.getActiveServer().name
        serverTextView.text = activeServerName

        // TODO: Should use RecyclerView
        val adapter = MergeAdapter()

        adapter.addView(serverButton, true)

        shouldUseId3 = getShouldUseId3Tags()

        if (!isOffline()) {
            adapter.addView(musicTitle, false)
            adapter.addViews(listOf(artistsButton, albumsButton, genresButton), true)
            adapter.addView(songsTitle, false)
            adapter.addViews(listOf(randomSongsButton, songsStarredButton), true)
            adapter.addView(albumsTitle, false)
            adapter.addViews(
                listOf(
                    albumsNewestButton,
                    albumsRecentButton,
                    albumsFrequentButton
                ),
                true
            )
            if (!shouldUseId3) {
                adapter.addView(albumsHighestButton, true)
            }
            adapter.addViews(
                listOf(
                    albumsRandomButton,
                    albumsStarredButton,
                    albumsAlphaByNameButton,
                    albumsAlphaByArtistButton
                ),
                true
            )
            adapter.addView(videosTitle, false)
            adapter.addViews(listOf(videosButton), true)
        } else {
            // Offline supported calls
            adapter.addView(musicTitle, false)
            adapter.addViews(listOf(artistsButton, genresButton), true)
            adapter.addView(songsTitle, false)
            adapter.addView(randomSongsButton, true)
        }

        list.adapter = adapter
        list.onItemClickListener = listListener
    }

    private val listListener =
        OnItemClickListener { _: AdapterView<*>?, view: View, _: Int, _: Long ->
            when {
                view === serverButton -> {
                    showServers()
                }
                view === albumsNewestButton -> {
                    showAlbumList("newest", R.string.main_albums_newest)
                }
                view === albumsRandomButton -> {
                    showAlbumList("random", R.string.main_albums_random)
                }
                view === albumsHighestButton -> {
                    showAlbumList("highest", R.string.main_albums_highest)
                }
                view === albumsRecentButton -> {
                    showAlbumList("recent", R.string.main_albums_recent)
                }
                view === albumsFrequentButton -> {
                    showAlbumList("frequent", R.string.main_albums_frequent)
                }
                view === albumsStarredButton -> {
                    showAlbumList(Constants.STARRED, R.string.main_albums_starred)
                }
                view === albumsAlphaByNameButton -> {
                    showAlbumList(Constants.ALPHABETICAL_BY_NAME, R.string.main_albums_alphaByName)
                }
                view === albumsAlphaByArtistButton -> {
                    showAlbumList("alphabeticalByArtist", R.string.main_albums_alphaByArtist)
                }
                view === songsStarredButton -> {
                    showStarredSongs()
                }
                view === artistsButton -> {
                    showArtists()
                }
                view === albumsButton -> {
                    showAlbumList(Constants.ALPHABETICAL_BY_NAME, R.string.main_albums_title)
                }
                view === randomSongsButton -> {
                    showRandomSongs()
                }
                view === genresButton -> {
                    showGenres()
                }
                view === videosButton -> {
                    showVideos()
                }
            }
        }

    private fun getActiveServerProperties(): String {
        val server = activeServerProvider.getActiveServer()
        return String.format(
            Locale.ROOT,
            "%s;%s;%s;%s;%s;%s",
            server.url,
            server.userName,
            server.password,
            server.allowSelfSignedCertificate,
            server.ldapSupport,
            server.minimumApiVersion
        )
    }

    private fun showStarredSongs() {
        val bundle = Bundle()
        bundle.putInt(Constants.INTENT_EXTRA_NAME_STARRED, 1)
        Navigation.findNavController(requireView()).navigate(R.id.mainToTrackCollection, bundle)
    }

    private fun showRandomSongs() {
        val bundle = Bundle()
        bundle.putInt(Constants.INTENT_EXTRA_NAME_RANDOM, 1)
        bundle.putInt(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_SIZE, getMaxSongs())
        Navigation.findNavController(requireView()).navigate(R.id.mainToTrackCollection, bundle)
    }

    private fun showArtists() {
        val bundle = Bundle()
        bundle.putString(
            Constants.INTENT_EXTRA_NAME_ALBUM_LIST_TITLE,
            requireContext().resources.getString(R.string.main_artists_title)
        )
        Navigation.findNavController(requireView()).navigate(R.id.mainToArtistList, bundle)
    }

    private fun showAlbumList(type: String, titleIndex: Int) {
        val bundle = Bundle()
        val title = requireContext().resources.getString(titleIndex, "")
        bundle.putString(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_TYPE, type)
        bundle.putString(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_TITLE, title)
        bundle.putInt(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_SIZE, getMaxAlbums())
        bundle.putInt(Constants.INTENT_EXTRA_NAME_ALBUM_LIST_OFFSET, 0)
        Navigation.findNavController(requireView()).navigate(R.id.mainToAlbumList, bundle)
    }

    private fun showGenres() {
        Navigation.findNavController(requireView()).navigate(R.id.mainToSelectGenre)
    }

    private fun showVideos() {
        val bundle = Bundle()
        bundle.putInt(Constants.INTENT_EXTRA_NAME_VIDEOS, 1)
        Navigation.findNavController(requireView()).navigate(R.id.mainToTrackCollection, bundle)
    }

    private fun showServers() {
        Navigation.findNavController(requireView()).navigate(R.id.mainToServerSelector)
    }

    companion object {
        private var shouldUseId3 = false
        private var cachedActiveServerProperties: String? = null
    }
}