package org.mosad.teapod.ui.activity.main.fragments

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.SearchView
import androidx.fragment.app.Fragment
import androidx.lifecycle.lifecycleScope
import kotlinx.coroutines.Job
import kotlinx.coroutines.async
import org.mosad.teapod.databinding.FragmentSearchBinding
import org.mosad.teapod.parser.crunchyroll.Crunchyroll
import org.mosad.teapod.util.ItemMedia
import org.mosad.teapod.util.adapter.MediaItemListAdapter
import org.mosad.teapod.util.decoration.MediaItemDecoration
import org.mosad.teapod.util.showFragment
import org.mosad.teapod.util.toItemMediaList

class SearchFragment : Fragment() {

    private lateinit var binding: FragmentSearchBinding
    private lateinit var adapter: MediaItemListAdapter

    private val itemList = arrayListOf<ItemMedia>()
    private var searchJob: Job? = null
    private var oldSearchQuery = ""

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
        binding = FragmentSearchBinding.inflate(inflater, container, false)
        return binding.root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        binding.recyclerMediaSearch.addItemDecoration(MediaItemDecoration(9))

        adapter = MediaItemListAdapter(MediaItemListAdapter.OnClickListener {
            binding.searchText.clearFocus()
            activity?.showFragment(MediaFragment(it.id))
        })
        binding.recyclerMediaSearch.adapter = adapter

        initActions()
    }

    private fun initActions() {
        binding.searchText.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
            override fun onQueryTextSubmit(query: String?): Boolean {
                query?.let { search(it) }
                return false
            }

            override fun onQueryTextChange(newText: String?): Boolean {
                newText?.let { search(it) }
                return false
            }
        })
    }

    /**
     * Search for a query string at Crunchyroll and submit the results to the adapter.
     */
    private fun search(query: String) {
        // if the query hasn't changed since the last successful search, return
        if (query == oldSearchQuery) return

        // cancel search job if one is already running
        if (searchJob?.isActive == true) searchJob?.cancel()

        searchJob = lifecycleScope.async {
            // TODO maybe wait a few ms (500ms?) before searching, if the user inputs any other chars
            val results = Crunchyroll.search(query, 50)

            itemList.clear() // TODO needs clean up

            // TODO add top results first heading
            adapter.submitList(
                results.items.firstOrNull()?.items?.toItemMediaList() ?: listOf<ItemMedia>()
            )

            // TODO currently only tv shows are supported, hence only the first items array
            //  should be always present

//            // TODO add tv shows heading
//            if (results.items.size >= 2) {
//                itemList.addAll(results.items[1].items.map { item ->
//                    ItemMedia(item.id, item.title, item.images.poster_wide[0][0].source)
//                })
//            }
//
//            // TODO add movies heading
//            if (results.items.size >= 3) {
//                itemList.addAll(results.items[2].items.map { item ->
//                    ItemMedia(item.id, item.title, item.images.poster_wide[0][0].source)
//                })
//            }
//
//            // TODO add episodes heading
//            if (results.items.size >= 4) {
//                itemList.addAll(results.items[3].items.map { item ->
//                    ItemMedia(item.id, item.title, item.images.poster_wide[0][0].source)
//                })
//            }

            // after successfully searching the query term, add it as old query, to make sure we
            // don't search again if the query hasn't changed
            oldSearchQuery = query
        }
    }
}