package com.covalima.rekomendasaunaihan.ui.rekomendasi

import android.os.Bundle
import android.view.View
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.LinearLayoutManager
import com.covalima.rekomendasaunaihan.databinding.ActivityRekomendasaunHasilBinding
import com.covalima.rekomendasaunaihan.model.ApiResponse
import com.covalima.rekomendasaunaihan.model.PreferensiaRequest
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

/**
 * "Form" foun ne'ebé hatudu rezultadu kompletu husi algoritmu
 * Content-Based Filtering (Cosine Similarity berbobot), hanesan iha
 * Kapítulu 3.9-3.12 iha proposta (Rezultadu Rekomendasaun ba Utilizadór).
 *
 * Modu dahuluk (default): "acuan" = ai-han ne'ebé utilizadór hili/haree
 *   (extra "id_aihan" + "naran_aihan").
 * Modu rua: "preferensia" = utilizadór hili preferénsia nia rasik liu
 *   husi [PreferensiaActivity] (extra "modu"="preferensia" + pref_*).
 */
class RekomendasaunHasilActivity : AppCompatActivity() {

    private lateinit var binding: ActivityRekomendasaunHasilBinding
    private lateinit var adapter: RekomendasaunHasilAdapter
    private var idAihan: Int = -1
    private var moduPreferensia: Boolean = false

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityRekomendasaunHasilBinding.inflate(layoutInflater)
        setContentView(binding.root)

        setSupportActionBar(binding.toolbar)
        supportActionBar?.setDisplayHomeAsUpEnabled(true)
        supportActionBar?.title = "Rezultadu Rekomendasaun"
        binding.toolbar.setNavigationOnClickListener { finish() }

        moduPreferensia = intent.getStringExtra("modu") == "preferensia"

        adapter = RekomendasaunHasilAdapter(emptyList())
        binding.rvHasil.layoutManager = LinearLayoutManager(this)
        binding.rvHasil.adapter = adapter

        if (moduPreferensia) {
            binding.tvNaranAcuan.text = "Preferénsia Ita Nian"
            loadRezultaduPreferensia()
        } else {
            idAihan = intent.getIntExtra("id_aihan", -1)
            val naranAihan = intent.getStringExtra("naran_aihan") ?: "-"
            binding.tvNaranAcuan.text = naranAihan

            if (idAihan == -1) {
                Toast.makeText(this, "Aihan la valid", Toast.LENGTH_SHORT).show()
                finish()
                return
            }
            loadRezultaduAihan()
        }
    }

    private fun loadRezultaduAihan() {
        binding.progressBar.visibility = View.VISIBLE
        binding.tvEmpty.visibility = View.GONE

        ApiClient.apiService.getRekomendasi(idAihan).enqueue(object : Callback<ApiResponse<List<Rekomendasi>>> {
            override fun onResponse(
                call: Call<ApiResponse<List<Rekomendasi>>>,
                response: Response<ApiResponse<List<Rekomendasi>>>
            ) {
                binding.progressBar.visibility = View.GONE
                tampilkanRezultadu(response.body()?.data)
            }

            override fun onFailure(call: Call<ApiResponse<List<Rekomendasi>>>, t: Throwable) {
                binding.progressBar.visibility = View.GONE
                binding.tvEmpty.visibility = View.VISIBLE
                Toast.makeText(this@RekomendasaunHasilActivity, "Konesaun falha: ${t.message}", Toast.LENGTH_SHORT).show()
            }
        })
    }

    private fun loadRezultaduPreferensia() {
        binding.progressBar.visibility = View.VISIBLE
        binding.tvEmpty.visibility = View.GONE

        val request = PreferensiaRequest(
            ikan = intent.getIntExtra("pref_ikan", 0),
            nan = intent.getIntExtra("pref_nan", 0),
            modo = intent.getIntExtra("pref_modo", 0),
            dosi = intent.getIntExtra("pref_dosi", 0),
            manas = intent.getIntExtra("pref_manas", 0),
            midar = intent.getIntExtra("pref_midar", 0),
            moruk = intent.getIntExtra("pref_moruk", 0),
            sin = intent.getIntExtra("pref_sin", 0),
            mamar = intent.getIntExtra("pref_mamar", 0),
            tos = intent.getIntExtra("pref_tos", 0),
            idDevice = DeviceUtil.getDeviceId(this)
        )

        ApiClient.apiService.getRekomendasiPreferensia(request).enqueue(object : Callback<ApiResponse<List<Rekomendasi>>> {
            override fun onResponse(
                call: Call<ApiResponse<List<Rekomendasi>>>,
                response: Response<ApiResponse<List<Rekomendasi>>>
            ) {
                binding.progressBar.visibility = View.GONE
                tampilkanRezultadu(response.body()?.data)
            }

            override fun onFailure(call: Call<ApiResponse<List<Rekomendasi>>>, t: Throwable) {
                binding.progressBar.visibility = View.GONE
                binding.tvEmpty.visibility = View.VISIBLE
                Toast.makeText(this@RekomendasaunHasilActivity, "Konesaun falha: ${t.message}", Toast.LENGTH_SHORT).show()
            }
        })
    }

    private fun tampilkanRezultadu(data: List<Rekomendasi>?) {
        if (data.isNullOrEmpty()) {
            binding.tvEmpty.visibility = View.VISIBLE
        } else {
            adapter.updateData(data)
        }
    }
}