package com.github.libretube

import android.content.Context
import android.os.Bundle
import android.text.Editable
import android.text.TextWatcher
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.view.WindowManager
import android.view.inputmethod.EditorInfo
import android.view.inputmethod.InputMethodManager
import android.widget.ArrayAdapter
import android.widget.AutoCompleteTextView
import android.widget.TextView.*
import androidx.fragment.app.Fragment
import androidx.lifecycle.lifecycleScope
import androidx.preference.PreferenceManager
import androidx.recyclerview.widget.GridLayoutManager
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.github.libretube.adapters.SearchAdapter
import com.github.libretube.adapters.SearchHistoryAdapter
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.delay
import kotlinx.coroutines.launch
import retrofit2.HttpException
import java.io.IOException


class SearchFragment : Fragment() {
    private val TAG = "SearchFragment"
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        arguments?.let {

        }
    }

    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)

        val autoTextView = view.findViewById<AutoCompleteTextView>(R.id.autoCompleteTextView)

        val historyRecycler = view.findViewById<RecyclerView>(R.id.history_recycler)


        //show search history

        recyclerView.visibility = GONE
        historyRecycler.visibility = VISIBLE

        historyRecycler.layoutManager = LinearLayoutManager(view.context)

        var historylist = getHistory()
        if (historylist.size != 0) {
            historyRecycler.adapter =
                SearchHistoryAdapter(requireContext(), historylist, autoTextView)
        }

        recyclerView.layoutManager = GridLayoutManager(view.context, 1)
        autoTextView.requestFocus()
        val imm =
            requireContext().getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
        imm!!.showSoftInput(autoTextView, InputMethodManager.SHOW_IMPLICIT)
        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!! != "") {
                    recyclerView.visibility = VISIBLE
                    historyRecycler.visibility = GONE
                    recyclerView.adapter = null

                    GlobalScope.launch {
                        fetchSuggestions(s.toString(), autoTextView)
                        delay(3000)
                        addtohistory(s.toString())
                        fetchSearch(s.toString(), recyclerView)
                    }


                }
            }

            override fun afterTextChanged(s: Editable?) {
                if (s!!.isEmpty()) {
                    recyclerView.visibility = GONE
                    historyRecycler.visibility = VISIBLE
                    var historylist = getHistory()
                    if (historylist.size != 0) {
                        historyRecycler.adapter =
                            SearchHistoryAdapter(requireContext(), historylist, autoTextView)
                    }
                }
            }

        })
        autoTextView.setOnEditorActionListener(OnEditorActionListener { _, actionId, _ ->
            if (actionId == EditorInfo.IME_ACTION_SEARCH) {
                hideKeyboard();
                autoTextView.dismissDropDown();
                return@OnEditorActionListener true
            }
            false
        })
        autoTextView.setOnItemClickListener { _, _, _, _ ->
            hideKeyboard()
        }
    }

    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 $e")
                return@launchWhenCreated
            } catch (e: HttpException) {
                Log.e(TAG, "HttpException, unexpected response")
                return@launchWhenCreated
            }
            if(response.items!!.isNotEmpty()){
               runOnUiThread {
                   recyclerView.adapter = SearchAdapter(response.items)
               }
            }

        }
    }

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

    override fun onResume() {
        super.onResume()
        requireActivity().window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN)
    }

    override fun onStop() {
        super.onStop()
        hideKeyboard()
    }

    private fun addtohistory(query: String) {
        val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(requireContext())

        var historyList = getHistory()


        if (historyList.size != 0 && query == historyList.get(historyList.size - 1)) {
            return
        } else if (query == "") {
            return
        } else {
            historyList = historyList + query

        }



        if (historyList.size > 10) {
            historyList = historyList.takeLast(10)
        }

        var set: Set<String> = HashSet(historyList)

        sharedPreferences.edit().putStringSet("search_history", set)
            .apply()
    }

    private fun getHistory(): List<String> {
        try {
            val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(requireContext())
            val set: Set<String> = sharedPreferences.getStringSet("search_history", HashSet())!!
            return set.toList()
        } catch (e: Exception) {
            return emptyList()
        }

    }
}