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package xyz.adjutor.aniki.presentation.controller.manga
import android.content.Context
import android.content.SharedPreferences
import android.view.View
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.manga.TopMangaApi
import xyz.adjutor.aniki.presentation.model.manga.TopManga
import xyz.adjutor.aniki.presentation.model.manga.TopMangaResponse
import xyz.adjutor.aniki.presentation.view.manga.TopMangaPage
import java.lang.reflect.Type
import kotlin.properties.Delegates
class TopMangaController {
lateinit var sharedPreferences: SharedPreferences
lateinit var gson: Gson
lateinit var baseUrl: String //the api's base url
var page by Delegates.notNull<Int>()
lateinit var view: TopMangaPage
fun onStart(topMangaPage: TopMangaPage, viewTopMangaPage: View) {
view = topMangaPage
baseUrl = "https://api.jikan.moe/" //the api's base url
page = 1
gson = GsonBuilder()
.setLenient()
.create()
sharedPreferences =
viewTopMangaPage.context.getSharedPreferences("sp_manga", Context.MODE_PRIVATE)
val mangaList: List<TopManga>? = getDataFromCache()
if (mangaList != null) {
view.showList(viewTopMangaPage, mangaList)
} else {
makeApiCall(view, baseUrl, 1)
}
}
private fun makeApiCall(view: TopMangaPage, BASE_URL: String, page: Int) {
val retrofit = Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create(gson))
.build()
val service = retrofit.create(TopMangaApi::class.java)
val call = service.getTopMangaData(page)
call.enqueue(object : Callback<TopMangaResponse> {
override fun onResponse(
call: Call<TopMangaResponse>,
response: Response<TopMangaResponse>
) {
if (response.isSuccessful && response.body() != null) { //if the code returned is >= 200 and < 300 AND the the body ain't empty
val mangaList: List<TopManga> = response.body()!!
.getResults() //getting the "top" field containing our list of TopMangas
saveList(mangaList)
view.showList(
view.requireView(),
mangaList
) //calling the method in charge of displaying on the recyclerview
} else {
view.showError() //a snackbar
}
}
override fun onFailure(call: Call<TopMangaResponse>, t: Throwable) {
view.showError()
}
})
}
private fun saveList(mangaList: List<TopManga>) {
val jsonString: String = gson.toJson(mangaList)
sharedPreferences
.edit()
.putString("jsonMangaList", jsonString)
.apply()
}
private fun getDataFromCache(): List<TopManga>? {
//the value of the mangaList json, if nothing is found, return null
val jsonManga: String? = sharedPreferences.getString("jsonMangaList", null)
//if it's null, well, return null
return if (jsonManga == null) {
null
} else { //else deserialize the list and return it
val listType: Type = object : TypeToken<List<TopManga>>() {}.type
gson.fromJson(jsonManga, listType)
}
}
fun onButtonPrevClick() {
if (page > 1) { // if we're not on the first page, because we can't go back if we're on the first one.
page -= 1
makeApiCall(view, baseUrl, page)
view.showText("Page $page has been loaded.")
} else {
view.showText("You're already on page 1. (If you're actually not, refresh the list.)")
}
}
fun onButtonNextClick() {
page += 1
makeApiCall(view, baseUrl, page)
view.showText("Page $page has been loaded.")
}
fun updateList() {
makeApiCall(view, baseUrl, 1)
view.showText("Data refreshed")
page = 1
}
}
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