package joy.reactor.data.mappers.post

import android.text.TextUtils
import joy.reactor.data.enteties.Image
import joy.reactor.data.http.HttpClient
import org.jsoup.nodes.Element
import java.util.*

/**
 * Created by omazhukin on 4/14/2016.
 */
class PostImagesThumbnailParser(private val element: Element) {

    var imagesList = ArrayList<Image>();

    fun getExpandedImages(): MutableList<Image> {
        return imagesList;
    }

    fun load(): Image? {
        val imgList = element.getElementsByClass("image")

        for (img in imgList) {
            if (img != null) {
                val gif = GifThumbnailParser(img).load()
                if (gif != null) {
                    // This prevents from gif losing due to the preview
                    imagesList.add(gif)
                } else {
                    val imageScr = img.select("a[href] img")

                    if (imageScr.isEmpty()) {
                        continue
                    }

                    val attr = imageScr.attr("height")

                    if (attr.contains("%")) {
                        throw IllegalStateException("Unsupported Height")
                    }

                    val height = parseDimen(imageScr[0], "height")
                    val width = parseDimen(imageScr[0], "width");

                    imagesList.add(Image(getImageLink(imageScr[0]), width, height))
                }
            }
        }

        if (imagesList.size > 0) {
            return imagesList[0];
        } else {
            return null;
        }
    }

    private fun getImageLink(img: Element): String {
        return if (hasFull(img)) {
            img.parent().attr("href").replace("(/full/).+(-\\d+\\.)".toRegex(), "$1$2")
        } else {
            img.attr("src").replace("(/post/).+(-\\d+\\.)".toRegex(), "$1$2")
        }
    }

    private fun parseDimen(img: Element, attrName: String): Int {
        val attr = img.attr(attrName)
        if (attr == null || TextUtils.isEmpty(attr)) {
            return 0;
        } else {
            return Integer.parseInt(attr);
        }
    }

    private fun hasFull(img: Element): Boolean {
        return "a" == img.parent().tagName()
    }
}