package xyz.adjutor.aniki.topmanga

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.manga.MangaApi
import xyz.adjutor.aniki.manga.RestMangaResponse
import java.lang.reflect.Type

class DetailTopMangaActivity : AppCompatActivity() {

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

    private val intentMangaId = "themangaid"
    private val intentMangaTitle = "themangatitle"
    private val intentMangaRank = "themangarank"
    private val intentMangaScore = "themangascore"
    private val intentMangaImageUrl = "themangaimageurl"

    private val intentMangaVolumes = "themangavolumes"
    private val intentMangaStartDate = "themangastartdate"
    private val intentMangaEndDate = "themangaenddate"

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

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

        val mangaId = intent.getStringExtra(intentMangaId)
        val mangaTitle = intent.getStringExtra(intentMangaTitle)
        val mangaRank = intent.getStringExtra(intentMangaRank)
        val mangaScore = intent.getStringExtra(intentMangaScore)
        val mangaImageUrl = intent.getStringExtra(intentMangaImageUrl)

        val mangaVolumes = intent.getStringExtra(intentMangaVolumes)
        val mangaStartDate = intent.getStringExtra(intentMangaStartDate)
        val mangaEndDate = intent.getStringExtra(intentMangaEndDate)

        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 tvVolumes: TextView = findViewById(R.id.tv_volumes)
        val tvStartDate: TextView = findViewById(R.id.tv_start_date)
        val tvEndDate: TextView = findViewById(R.id.tv_end_date)

        tvId.text = mangaId
        tvTitle.text = mangaTitle
        tvRank.text = mangaRank
        tvScore.text = mangaScore
        Glide
            .with(this)
            .load(mangaImageUrl)
            .apply(RequestOptions().override(400))
            .into(ivImage)

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

        tvStartDate.text = mangaStartDate

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

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

    }

    private fun getDataFromCache(mangaId: String): RestMangaResponse? {
        val jsonManga: String?= sharedPreferences?.getString(mangaId, null)

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

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

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

        val service = retrofit.create(MangaApi::class.java)
        val call = service.getMangaData(mangaId) //based on the id

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

                    val manga = response.body() //getting the RestMangaResponse fields
                    saveList(manga)
                    showDetail(manga!!)

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

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

        })
    }

    private fun showDetail(manga: RestMangaResponse) {
        //elements from RestMangaResponse
        val tvChapters: TextView = findViewById(R.id.tv_chapters)
        val tvSynopsis: TextView = findViewById(R.id.tv_synopsis)
        val tvBackground: TextView = findViewById(R.id.tv_background)

        tvChapters.text = if (manga.chapters != null){
            manga.chapters.toString()
        } else {
            fieldIsNull()
        }

        tvSynopsis.text = manga.synopsis.toString()

        tvBackground.text = if (manga.background != null){
            manga.background.toString()
        } else {
            fieldIsNull()
        }

    }

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

    fun saveList(manga: RestMangaResponse?) {
        val jsonString: String = gson.toJson(manga)

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