package com.myoa.engineering.crawl.ppomppu.processor.dto;

import java.time.Instant;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;

import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import com.myoa.engineering.crawl.ppomppu.processor.domain.PpomppuArticle;
import com.myoa.engineering.crawl.ppomppu.support.dto.code.PpomppuBoardName;

/**
 * PpomppuArticleTransformer
 *
 * @author Shin Woo-jin (woozu.shin@kakaoent.com)
 * @since 2021-09-08
 */
public final class PpomppuArticleParser {

    private static final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern("yy.MM.dd HH:mm:ss")
                                                                                  .withZone(ZoneId.of("Asia/Seoul"));

    private PpomppuArticleParser() {}

    public static PpomppuArticle toArticle(Elements articleElement) {
        final long articleId = PpomppuArticleParser.parseArticleId(articleElement.get(0));
        final String title = PpomppuArticleParser.parseTitle(articleElement.get(2));
        final String articleUrl = PpomppuArticleParser.parseArticleUrl(articleElement.get(2));
        final String thumbnailUrl = PpomppuArticleParser.parseThumbnailUrl(articleElement.get(3));
        final int recommended = PpomppuArticleParser.parseRecommended(articleElement.get(6));
        final int hit = PpomppuArticleParser.parseHit(articleElement.get(7));
        final Instant registeredAt = PpomppuArticleParser.parseRegisteredAt(articleElement.get(5));

        return PpomppuArticle.builder()
                             .articleId(articleId)
                             .title(title)
                             .articleUrl(articleUrl)
                             .thumbnailUrl(thumbnailUrl)
                             .recommended(recommended)
                             .hit(hit)
                             .registeredAt(registeredAt)
                             .build();
    }

    public static Long parseArticleId(Element td) {
        return Long.parseLong(td.text().trim());
    }

    public static String parseTitle(Element td) {
        return td.getElementsByTag("a").text();
    }

    public static String parseArticleUrl(Element td) {
        return PpomppuBoardName.ofViewPageUrl(td.getElementsByTag("a").attr("href"));
    }

    public static String parseThumbnailUrl(Element td) {
        return "https:" + td.getElementsByTag("img").get(0).attr("src");
    }

    public static Integer parseRecommended(Element td) {
        final String voteString = td.text();
        final int recommended;

        if (voteString.isEmpty()) {
            recommended = 0;
        } else {
            final int voteUp = Integer.parseInt(td.text().split(" - ")[0]);
            final int voteDown = Integer.parseInt(td.text().split(" - ")[1]);
            recommended = voteUp - voteDown;
        }
        return recommended;
    }

    public static Integer parseHit(Element td) {
        return Integer.parseInt(td.text());
    }

    public static Instant parseRegisteredAt(Element td) {
        final String registeredAtString = td.attr("title");
        return DATE_TIME_FORMATTER.parse(registeredAtString, Instant::from);
    }

}