LibreTube/app/src/main/java/com/github/libretube/SearchFragment.kt

package com.github.libretube

import android.os.Bundle
import android.text.Editable
import android.text.TextWatcher
import android.util.Log
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ArrayAdapter
import android.widget.AutoCompleteTextView
import androidx.lifecycle.lifecycleScope
import androidx.recyclerview.widget.GridLayoutManager
import androidx.recyclerview.widget.RecyclerView
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.delay
import kotlinx.coroutines.launch
import retrofit2.HttpException
import com.github.libretube.adapters.SearchAdapter
import java.io.IOException

// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private const val ARG_PARAM1 = "param1"
private const val ARG_PARAM2 = "param2"

/**
 * A simple [Fragment] subclass.
 * Use the [SearchFragment.newInstance] factory method to
 * create an instance of this fragment.
 */
class SearchFragment : Fragment() {
    // TODO: Rename and change types of parameters
    private val TAG = "SearchFragment"

    private var param1: String? = null
    private var param2: String? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        arguments?.let {
            param1 = it.getString(ARG_PARAM1)
            param2 = it.getString(ARG_PARAM2)
        }
    }

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_search, container, false)
    }


    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        val recyclerView = view.findViewById<RecyclerView>(R.id.search_recycler)
        recyclerView.layoutManager = GridLayoutManager(view.context, 1)
        val autoTextView = view.findViewById<AutoCompleteTextView>(R.id.autoCompleteTextView)
            autoTextView.addTextChangedListener(object : TextWatcher {
                override fun beforeTextChanged(
                    s: CharSequence?,
                    start: Int,
                    count: Int,
                    after: Int
                ) {

                }

                override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
                    if(s!! != ""){
                        GlobalScope.launch {
                            fetchSuggestions(s.toString(), autoTextView)
                            delay(2000)
                            fetchSearch(s.toString(),recyclerView)
                        }
                    }
                }

                override fun afterTextChanged(s: Editable?) {

                }

            })
    }

    private fun fetchSuggestions(query: String, autoTextView: AutoCompleteTextView){
        lifecycleScope.launchWhenCreated {
            val response = try {
                RetrofitInstance.api.getSuggestions(query)
            } catch (e: IOException) {
                println(e)
                Log.e(TAG, "IOException, you might not have internet connection")
                return@launchWhenCreated
            } catch (e: HttpException) {
                Log.e(TAG, "HttpException, unexpected response")
                return@launchWhenCreated
            }
            val adapter = ArrayAdapter(requireContext(), android.R.layout.simple_list_item_1, response)
            autoTextView.setAdapter(adapter)
        }
    }
    private fun fetchSearch(query: String, recyclerView: RecyclerView){
        lifecycleScope.launchWhenCreated {
            val response = try {
                RetrofitInstance.api.getSearchResults(query, "all")
            } catch (e: IOException) {
                println(e)
                Log.e(TAG, "IOException, you might not have internet connection")
                return@launchWhenCreated
            } catch (e: HttpException) {
                Log.e(TAG, "HttpException, unexpected response")
                return@launchWhenCreated
            }
            if(response.items!!.isNotEmpty()){
               runOnUiThread {
                   recyclerView.adapter = SearchAdapter(response.items)
               }
            }

        }
    }
    companion object {
        /**
         * Use this factory method to create a new instance of
         * this fragment using the provided parameters.
         *
         * @param param1 Parameter 1.
         * @param param2 Parameter 2.
         * @return A new instance of fragment SearchFragment.
         */
        // TODO: Rename and change types and number of parameters
        @JvmStatic
        fun newInstance(param1: String, param2: String) =
            SearchFragment().apply {
                arguments = Bundle().apply {
                    putString(ARG_PARAM1, param1)
                    putString(ARG_PARAM2, param2)
                }
            }
    }

    private fun Fragment?.runOnUiThread(action: () -> Unit) {
        this ?: return
        if (!isAdded) return // Fragment not attached to an Activity
        activity?.runOnUiThread(action)
    }
}