package com.covalima.rekomendasaunaihan.ui.rekomendasi

import android.content.Intent
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.Toast
import androidx.fragment.app.Fragment
import androidx.recyclerview.widget.LinearLayoutManager
import com.covalima.rekomendasaunaihan.databinding.FragmentRekomendasiBinding
import com.covalima.rekomendasaunaihan.model.ApiResponse
import com.covalima.rekomendasaunaihan.model.Rekomendasi
import com.covalima.rekomendasaunaihan.network.ApiClient
import com.covalima.rekomendasaunaihan.util.DeviceUtil
import retrofit2.Call
import retrofit2.Callback
import retrofit2.Response

class RekomendasiFragment : Fragment() {

    private var _binding: FragmentRekomendasiBinding? = null
    private val binding get() = _binding!!
    private lateinit var adapter: RekomendasiAdapter

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

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

        adapter = RekomendasiAdapter(emptyList())
        binding.rvRekomendasi.layoutManager = LinearLayoutManager(requireContext())
        binding.rvRekomendasi.adapter = adapter

        binding.btnHiliPreferensia.setOnClickListener {
            startActivity(Intent(requireContext(), com.covalima.rekomendasaunaihan.ui.rekomendasi.PreferensiaActivity::class.java))
        }

        binding.swipeRefresh.setOnRefreshListener { cariAihanAcuan() }
        cariAihanAcuan()
    }

    // Langkah 1: hetan aihan ne'ebe user fo bintang aas liu, hanesan "acuan" ba CBF
    private fun cariAihanAcuan() {
        binding.progressBar.visibility = View.VISIBLE
        val deviceId = DeviceUtil.getDeviceId(requireContext())

        ApiClient.apiService.getUserRatings(deviceId).enqueue(object : Callback<ApiResponse<List<Map<String, Int>>>> {
            override fun onResponse(
                call: Call<ApiResponse<List<Map<String, Int>>>>,
                response: Response<ApiResponse<List<Map<String, Int>>>>
            ) {
                val ratings = response.body()?.data
                if (ratings.isNullOrEmpty()) {
                    binding.progressBar.visibility = View.GONE
                    binding.swipeRefresh.isRefreshing = false
                    Toast.makeText(
                        requireContext(),
                        "Fo fitun uluk ba aihan ida, para hetan rekomendasaun personál",
                        Toast.LENGTH_LONG
                    ).show()
                    return
                }
                // Hili aihan ho bintang aas liu hanesan acuan
                val acuan = ratings.maxByOrNull { it["valor_bintang"] ?: 0 }
                val idAcuan = acuan?.get("id_aihan") ?: return
                loadRekomendasi(idAcuan)
            }

            override fun onFailure(call: Call<ApiResponse<List<Map<String, Int>>>>, t: Throwable) {
                binding.progressBar.visibility = View.GONE
                binding.swipeRefresh.isRefreshing = false
                Toast.makeText(requireContext(), "Konesaun falha: ${t.message}", Toast.LENGTH_SHORT).show()
            }
        })
    }

    // Langkah 2: hetan lista rekomendasaun (Content-Based Filtering) husi id_aihan acuan
    private fun loadRekomendasi(idAihanAcuan: Int) {
        ApiClient.apiService.getRekomendasi(idAihanAcuan).enqueue(object : Callback<ApiResponse<List<Rekomendasi>>> {
            override fun onResponse(
                call: Call<ApiResponse<List<Rekomendasi>>>,
                response: Response<ApiResponse<List<Rekomendasi>>>
            ) {
                binding.progressBar.visibility = View.GONE
                binding.swipeRefresh.isRefreshing = false
                val body = response.body()
                if (body?.status == "success" && body.data != null) {
                    adapter.updateData(body.data)
                } else {
                    Toast.makeText(requireContext(), "Rekomendasaun la hetan", Toast.LENGTH_SHORT).show()
                }
            }

            override fun onFailure(call: Call<ApiResponse<List<Rekomendasi>>>, t: Throwable) {
                binding.progressBar.visibility = View.GONE
                binding.swipeRefresh.isRefreshing = false
                Toast.makeText(requireContext(), "Konesaun falha: ${t.message}", Toast.LENGTH_SHORT).show()
            }
        })
    }

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