package xyz.adjutor.aniki.topanime

import android.content.Context
import android.content.SharedPreferences
import android.os.Bundle
import android.widget.ImageView
import android.widget.TextView
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.bumptech.glide.Glide
import com.bumptech.glide.request.RequestOptions
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.R
import xyz.adjutor.aniki.anime.AnimeApi
import xyz.adjutor.aniki.anime.RestAnimeResponse
import java.lang.reflect.Type

class DetailTopAnimeActivity : AppCompatActivity() {

    private var baseUrl = "https://api.jikan.moe/"
    var sharedPreferences: SharedPreferences? = null
    private val gson = GsonBuilder()
            .setLenient()
            .create()

    private val intentAnimeId = "theanimeid"
    private val intentAnimeTitle = "theanimetitle"
    private val intentAnimeRank = "theanimerank"
    private val intentAnimeScore = "theanimescore"
    private val intentAnimeImageUrl = "theanimeimageurl"

    private val intentAnimeEpisodes = "theanimeepisodes"
    private val intentAnimeStartDate = "theanimestartdate"
    private val intentAnimeEndDate = "theanimeenddate"
    private val intentAnimeUrl = "theanimeurl"

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_detail_top_anime)

        sharedPreferences = this.getSharedPreferences("sp_anime", Context.MODE_PRIVATE)

        val animeId = intent.getStringExtra(intentAnimeId)
        val animeTitle = intent.getStringExtra(intentAnimeTitle)
        val animeRank = intent.getStringExtra(intentAnimeRank)
        val animeScore = intent.getStringExtra(intentAnimeScore)
        val animeImageUrl = intent.getStringExtra(intentAnimeImageUrl)

        val animeEpisodes = intent.getStringExtra(intentAnimeEpisodes)
        val animeStartDate = intent.getStringExtra(intentAnimeStartDate)
        val animeEndDate = intent.getStringExtra(intentAnimeEndDate)
        val animeUrl = intent.getStringExtra(intentAnimeUrl)

        val tvId: TextView = findViewById(R.id.tv_detail_id)
        val tvTitle: TextView = findViewById(R.id.tv_detail_title)
        val tvRank: TextView = findViewById(R.id.tv_detail_rank)
        val tvScore: TextView = findViewById(R.id.tv_detail_score)
        val ivImage: ImageView = findViewById(R.id.iv_detail_image)

        val tvEpisodes: TextView = findViewById(R.id.tv_episodes)
        val tvStartDate: TextView = findViewById(R.id.tv_start_date)
        val tvEndDate: TextView = findViewById(R.id.tv_end_date)
        val tvUrl: TextView = findViewById(R.id.tv_url)

        tvId.text = animeId
        tvTitle.text = animeTitle
        tvRank.text = animeRank
        tvScore.text = animeScore
        Glide
            .with(this)
            .load(animeImageUrl)
            .apply(RequestOptions().override(400))
            .into(ivImage)

        //using null as a string because it has been converted to a string before
        tvEpisodes.text = if (animeEpisodes != "null"){
            animeEpisodes
        } else {
            fieldIsNull()
        }

        tvStartDate.text = animeStartDate

        tvEndDate.text = if (animeEndDate != "null"){
            animeEndDate
        } else {
            fieldIsNull()
        }

        tvUrl.text = animeUrl

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

    }

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

        return if(jsonAnime == null) {
            null
        } else {
            val type: Type = object : TypeToken<RestAnimeResponse>() {}.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<RestAnimeResponse> {
            override fun onResponse(call: Call<RestAnimeResponse>, response: Response<RestAnimeResponse>) {
                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 RestAnimeResponse fields
                    saveList(anime)
                    showDetail(anime!!)

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

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

        })
    }

    private fun showDetail(anime: RestAnimeResponse) {
        //elements from RestAnimeResponse
        val tvSynopsis: TextView = findViewById(R.id.tv_synopsis)

        tvSynopsis.text = anime.synopsis.toString()

    }

    fun showError(text: String) {
        Toast.makeText(this, text, Toast.LENGTH_LONG).show()
    }
    private fun fieldIsNull(): String{
        return "Unknown"
    }

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

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