package xyz.adjutor.aniki.presentation.controller.anime

import android.content.Context
import android.content.SharedPreferences
import com.google.gson.Gson
import com.google.gson.GsonBuilder
import com.google.gson.reflect.TypeToken
import retrofit2.Call
import retrofit2.Callback
import retrofit2.Response
import retrofit2.Retrofit
import retrofit2.converter.gson.GsonConverterFactory
import xyz.adjutor.aniki.data.anime.AnimeApi
import xyz.adjutor.aniki.presentation.model.anime.AnimeResponse
import xyz.adjutor.aniki.presentation.view.anime.DetailTopAnimeActivity
import java.lang.reflect.Type

class DetailTopAnimeController {

    private lateinit var sharedPreferences: SharedPreferences
    lateinit var gson: Gson
    private lateinit var baseUrl: String //the api's base url
    lateinit var view: DetailTopAnimeActivity

    fun onStart(DetailTopAnimeActivity: DetailTopAnimeActivity, animeId: String) {

        view = DetailTopAnimeActivity
        baseUrl = "https://api.jikan.moe/" //the api's base url
        gson = GsonBuilder()
            .setLenient()
            .create()
        sharedPreferences =
            view.applicationContext.getSharedPreferences("sp_anime", Context.MODE_PRIVATE)

        val anime: AnimeResponse? = getDataFromCache(animeId)
        if (anime != null) {
            view.showDetail(anime)
        } else {
            //taking the API's fields I want and displaying them
            makeApiCall(baseUrl, animeId)
        }
    }

    private fun getDataFromCache(animeId: String): AnimeResponse? {
        val jsonAnime: String? = sharedPreferences.getString(animeId, null)

        return if (jsonAnime == null) {
            null
        } else {
            val type: Type = object : TypeToken<AnimeResponse>() {}.type
            gson.fromJson(jsonAnime, type)
        }
    }

    private fun makeApiCall(BASE_URL: String, animeId: String) {

        val retrofit = Retrofit.Builder()
            .baseUrl(BASE_URL)
            .addConverterFactory(GsonConverterFactory.create(gson))
            .build()

        val service = retrofit.create(AnimeApi::class.java)
        val call = service.getAnimeData(animeId) //based on the id

        call.enqueue(object : Callback<AnimeResponse> {
            override fun onResponse(
                call: Call<AnimeResponse>,
                response: Response<AnimeResponse>
            ) {
                if (response.isSuccessful && response.body() != null) { //if the code returned is >= 200 and < 300 AND the the body ain't empty

                    val anime = response.body() //getting the AnimeResponse fields
                    saveList(anime)
                    view.showDetail(anime!!)

                } else {
                    view.showError("API ERROR : is not successful")
                }
            }

            override fun onFailure(call: Call<AnimeResponse>, t: Throwable) {
                view.showError("API ERROR : onFailure")
            }

        })
    }

    fun saveList(anime: AnimeResponse?) {
        val jsonString: String = gson.toJson(anime)

        sharedPreferences
            .edit()
            .putString(anime?.mal_id.toString(), jsonString)
            .apply()
    }

}