import bs4
import logging
import requests
import utils

from ebooklib import epub


def fetchVolume(title, description, metadatas, volume_title, output_dir, links):
    book = epub.EpubBook()
    book_items = []
    book.set_identifier(title.replace(" ", "").lower())
    book.set_title(title)
    book.set_language(metadatas["language"])
    book.set_cover("cover.jpg", open(metadatas["cover"], "rb").read())
    book.add_metadata("DC", "description", description)

    for author in metadatas["authors"]:
        book.add_author(author)

    for link in links:
        chapter_response = requests.get(link["href"])
        chapter_html = bs4.BeautifulSoup(chapter_response.content, "html.parser")
        chapter_content = chapter_html.select_one("div.entry-content")
        chapter_title = chapter_html.select_one("h1.entry-title").get_text().strip()

        to_remove = [
            chapter_content.find_all("a"),
            chapter_content.find_all("h3"),
            chapter_content.find_all("hr"),
            chapter_content.select("div.tiled-gallery"),
        ]

        for dataset in to_remove:
            for removed in dataset:
                removed.decompose()

        logging.log(logging.INFO, f"{title} - {chapter_title}")
        book_items.append(
            epub.EpubHtml(
                title=chapter_title,
                content=utils.generate_title_html(
                    chapter_title, chapter_content.prettify()
                ),
                file_name=f"{chapter_title}.xhtml",
                lang=metadatas["language"],
            )
        )

    logging.log(logging.INFO, f"{title} - {volume_title}")
    for book_item in book_items:
        book.add_item(book_item)

    book.add_item(epub.EpubNcx())
    book.add_item(epub.EpubNav())
    book.toc = book_items
    book.spine = ["cover", "nav", *book_items]
    epub.write_epub(f"{output_dir}/{title} - {volume_title}.epub", book)


@utils.executor
def process(metadatas, output_dir, url):
    response = requests.get(url)

    html = bs4.BeautifulSoup(response.content, "html.parser")
    content = html.select("div.entry-content > p")
    title = html.select_one("#site-title > span > a").get_text().strip()
    description = html.select_one("#site-description").get_text().strip()

    volume_title = None

    for paragraph in content:
        if paragraph.strong is not None:
            volume_title = paragraph.strong.get_text().strip()
        else:
            fetchVolume(
                title,
                description,
                metadatas,
                volume_title,
                output_dir,
                paragraph.find_all("a"),
            )