package exh.md.handlers

import eu.kanade.tachiyomi.data.preference.PreferencesHelper
import eu.kanade.tachiyomi.network.GET
import eu.kanade.tachiyomi.network.asObservableSuccess
import eu.kanade.tachiyomi.source.model.MangasPage
import eu.kanade.tachiyomi.source.model.SManga
import eu.kanade.tachiyomi.util.asJsoup
import exh.md.utils.MdUtil
import exh.md.utils.setMDUrlWithoutDomain
import okhttp3.CacheControl
import okhttp3.Headers
import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.Response
import org.jsoup.nodes.Element
import rx.Observable
import uy.kohesive.injekt.injectLazy

// Unused, kept for reference todo
/**
 * Returns the latest manga from the updates url since it actually respects the users settings
 */
class PopularHandler(val client: OkHttpClient, private val headers: Headers, private val useLowQualityCovers: Boolean) {

    private val preferences: PreferencesHelper by injectLazy()

    fun fetchPopularManga(page: Int): Observable<MangasPage> {
        return client.newCall(popularMangaRequest(page))
            .asObservableSuccess()
            .map { response ->
                popularMangaParse(response)
            }
    }

    private fun popularMangaRequest(page: Int): Request {
        return GET("${MdUtil.baseUrl}/updates/$page/", headers, CacheControl.FORCE_NETWORK)
    }

    private fun popularMangaParse(response: Response): MangasPage {
        val document = response.asJsoup()

        val mangas = document.select(popularMangaSelector).map { element ->
            popularMangaFromElement(element)
        }.distinctBy { it.url }

        val hasNextPage = popularMangaNextPageSelector.let { selector ->
            document.select(selector).first()
        } != null

        return MangasPage(mangas, hasNextPage)
    }

    private fun popularMangaFromElement(element: Element): SManga {
        val manga = SManga.create()
        element.select("a.manga_title").first().let {
            val url = MdUtil.modifyMangaUrl(it.attr("href"))
            manga.setMDUrlWithoutDomain(url)
            manga.title = it.text().trim()
        }

        manga.thumbnail_url = MdUtil.formThumbUrl(manga.url, useLowQualityCovers)

        return manga
    }

    companion object {
        const val popularMangaSelector = "tr a.manga_title"
        const val popularMangaNextPageSelector = ".pagination li:not(.disabled) span[title*=last page]:not(disabled)"
    }
}