package com.covalima.rekomendasaunaihan.ui.home

import android.content.Intent
import android.os.Bundle
import android.text.Editable
import android.text.TextWatcher
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.core.content.ContextCompat
import androidx.fragment.app.Fragment
import androidx.recyclerview.widget.GridLayoutManager
import com.covalima.rekomendasaunaihan.R
import com.covalima.rekomendasaunaihan.databinding.FragmentHomeBinding
import com.covalima.rekomendasaunaihan.model.Aihan
import com.covalima.rekomendasaunaihan.model.ApiResponse
import com.covalima.rekomendasaunaihan.model.Kategoria
import com.covalima.rekomendasaunaihan.network.ApiClient
import com.covalima.rekomendasaunaihan.ui.detail.DetailAihanActivity
import retrofit2.Call
import retrofit2.Callback
import retrofit2.Response

class HomeFragment : Fragment() {

    private var _binding: FragmentHomeBinding? = null
    private val binding get() = _binding!!

    private lateinit var rekomendasaunAdapter: GridAihanAdapter

    private var listAihanKompletu: List<Aihan> = emptyList()
    private var kategoriaTerpilih: String? = null // null = "Hotu-hotu"

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

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

        val onClick: (Aihan) -> Unit = { aihan ->
            val intent = Intent(requireContext(), DetailAihanActivity::class.java)
            intent.putExtra("id_aihan", aihan.idAihan)
            startActivity(intent)
        }

        rekomendasaunAdapter = GridAihanAdapter(emptyList(), onClick)

        binding.rvRekomendasaun.layoutManager = GridLayoutManager(requireContext(), 2)
        binding.rvRekomendasaun.adapter = rekomendasaunAdapter

        setupSearch()
        loadKategoria()
        loadAihan()
    }

    private fun setupSearch() {
        binding.etSearch.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) {
                aplikaFiltru()
            }
            override fun afterTextChanged(s: Editable?) {}
        })
    }

    private fun loadKategoria() {
        ApiClient.apiService.getListKategoria().enqueue(object : Callback<ApiResponse<List<Kategoria>>> {
            override fun onResponse(
                call: Call<ApiResponse<List<Kategoria>>>,
                response: Response<ApiResponse<List<Kategoria>>>
            ) {
                val data = response.body()?.data ?: return
                bangunChipKategoria(data)
            }

            override fun onFailure(call: Call<ApiResponse<List<Kategoria>>>, t: Throwable) {
                // ignora, chip la kritiku ba UX
            }
        })
    }

    private fun bangunChipKategoria(listKategoria: List<Kategoria>) {
        val container = binding.layoutKategoriaChips
        container.removeAllViews()

        val naranHotu = listOf("Hotu-hotu") + listKategoria.map { it.naranKategoria }

        naranHotu.forEachIndexed { index, naran ->
            val chip = TextView(requireContext()).apply {
                text = naran
                textSize = 13f
                setPadding(36, 18, 36, 18)
                isSelected = index == 0
                setTextColor(
                    if (isSelected) ContextCompat.getColor(requireContext(), R.color.white)
                    else ContextCompat.getColor(requireContext(), R.color.text_primary)
                )
                background = ContextCompat.getDrawable(requireContext(), R.drawable.bg_chip_kategoria)
                val params = ViewGroup.MarginLayoutParams(
                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT
                )
                params.marginEnd = 20
                layoutParams = params

                setOnClickListener {
                    for (i in 0 until container.childCount) {
                        val child = container.getChildAt(i) as TextView
                        child.isSelected = false
                        child.setTextColor(ContextCompat.getColor(requireContext(), R.color.text_primary))
                    }
                    isSelected = true
                    setTextColor(ContextCompat.getColor(requireContext(), R.color.white))
                    kategoriaTerpilih = if (naran == "Hotu-hotu") null else naran
                    aplikaFiltru()
                }
            }
            container.addView(chip)
        }
    }

    private fun loadAihan() {
        ApiClient.apiService.getListAihan().enqueue(object : Callback<ApiResponse<List<Aihan>>> {
            override fun onResponse(
                call: Call<ApiResponse<List<Aihan>>>,
                response: Response<ApiResponse<List<Aihan>>>
            ) {
                val data = response.body()?.data ?: return
                listAihanKompletu = data
                aplikaFiltru()
            }

            override fun onFailure(call: Call<ApiResponse<List<Aihan>>>, t: Throwable) {
                // ignora iha baranda, la kritiku
            }
        })
    }

    private fun aplikaFiltru() {
        val keyword = binding.etSearch.text.toString().trim().lowercase()

        var filtrado = listAihanKompletu
        if (kategoriaTerpilih != null) {
            filtrado = filtrado.filter { it.naranKategoria == kategoriaTerpilih }
        }
        if (keyword.isNotEmpty()) {
            filtrado = filtrado.filter { it.naranAihan.lowercase().contains(keyword) }
        }

        binding.tvEmptySearch.visibility = if (filtrado.isEmpty()) View.VISIBLE else View.GONE

        // Rekomendasaun: hatudu hotu-hotu ai-han ne'ebe hetan husi filtru, ordena husi rating aas ba kiik
        rekomendasaunAdapter.updateData(filtrado.sortedByDescending { it.rataBintang })
    }

    override fun onDestroyView() {
        super.onDestroyView()
        _binding = null
    }
}