# -*- coding: utf-8 -*-

# Copyright 2019 Mike Fährmann
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.

"""Extractors for http://blog.livedoor.jp/"""

from .common import Extractor, Message
from .. import text


class LivedoorExtractor(Extractor):
    """Base class for livedoor extractors"""
    category = "livedoor"
    root = "http://blog.livedoor.jp"
    img_root = "http://livedoor.blogimg.jp"
    filename_fmt = "{post[id]}_{post[title]}_{num:>02}.{extension}"
    directory_fmt = ("{category}", "{post[user]}")
    archive_fmt = "{post[id]}_{hash}"

    def __init__(self, match):
        Extractor.__init__(self, match)
        self.user = match.group(1)

    def items(self):
        yield Message.Version, 1
        for post in self.posts():
            images = self._images(post)
            if images:
                yield Message.Directory, {"post": post}
                for image in images:
                    yield Message.Url, image["url"], image

    def posts(self):
        """Return an iterable with post objects"""

    def _load(self, data, body):
        pid  , pos = text.extract(data, "id : '"   , "'")
        title, pos = text.extract(data, "title : '", "'", pos)
        cat1 , pos = text.extract(data, "name:'"   , "'", pos)
        cat2 , pos = text.extract(data, "name:'"   , "'", pos)
        date , pos = text.extract(data, "date : '" , "'", pos)
        tags , pos = text.extract(body, '</dt><dd>', '</dl>')

        return {
            "id"        : text.parse_int(pid),
            "title"     : title,
            "date"      : date,
            "categories": [cat1, cat2],
            "tags"      : text.split_html(tags),
            "user"      : self.user,
            "body"      : body,
        }

    def _images(self, post):
        imgs = []
        body = post.pop("body")

        for num, img in enumerate(text.extract_iter(body, "<img ", ">"), 1):
            src = text.extract(img, 'src="', '"')[0]
            alt = text.extract(img, 'alt="', '"')[0]

            if src.startswith(self.img_root):
                url = src.replace("-s.", ".")
            else:
                url = text.urljoin(self.root, src)
            name, _, ext = url.rpartition("/")[2].rpartition(".")

            imgs.append({
                "url"      : url,
                "num"      : num,
                "hash"     : name,
                "filename" : alt or name,
                "extension": ext,
                "post"     : post,
            })

        return imgs


class LivedoorBlogExtractor(LivedoorExtractor):
    """Extractor for a user's blog on blog.livedoor.jp"""
    subcategory = "blog"
    pattern = r"(?:https?://)?blog\.livedoor\.jp/(\w+)/?(?:$|[?&#])"
    test = ("http://blog.livedoor.jp/zatsu_ke/", {
        "range": "1-50",
        "count": 50,
        "pattern": r"http://livedoor.blogimg.jp/zatsu_ke/imgs/\w/\w/\w+\.\w+",
        "keyword": {
            "post": {
                "categories": list,
                "date": str,
                "id": int,
                "tags": list,
                "title": str,
                "user": "zatsu_ke"
            },
            "filename": str,
            "hash": r"re:\w{4,}",
            "num": int,
        },
    })

    def posts(self):
        url = "{}/{}".format(self.root, self.user)

        while url:
            page = self.request(url).text
            pos = 0

            while True:
                data, pos = text.extract(page, '.articles.push(', ');', pos)
                if not data:
                    break
                body, pos = text.extract(
                    page,
                    '<div class="article-body-inner">',
                    '<!-- articleBody End -->',
                    pos,
                )
                yield self._load(data, body)

            url = text.extract(page, '<a rel="next" href="', '"', pos)[0]


class LivedoorPostExtractor(LivedoorExtractor):
    """Extractor for images from a blog post on blog.livedoor.jp"""
    subcategory = "post"
    pattern = r"(?:https?://)?blog\.livedoor\.jp/(\w+)/archives/(\d+)"
    test = (
        ("http://blog.livedoor.jp/zatsu_ke/archives/51493859.html", {
            "url": "8826fe623f19dc868e7538e8519bf8491e92a0a2",
            "keyword": "52fcba9253a000c339bcd658572d252e282626af",
        }),
        ("http://blog.livedoor.jp/amaumauma/archives/7835811.html", {
            "url": "fc1d6a9557245b5a27d3a10bf0fa9922ef377215",
            "keyword": "0229072abb5cd8a221df72e0ffdfc13336c0e9ce",
        }),
    )

    def __init__(self, match):
        LivedoorExtractor.__init__(self, match)
        self.post_id = match.group(2)

    def posts(self):
        url = "{}/{}/archives/{}.html".format(
            self.root, self.user, self.post_id)
        page = self.request(url).text

        data, pos = text.extract(page, 'articles :', '</script>')
        body, pos = text.extract(
            page,
            '<div class="article-body-inner">',
            '<!-- articleBody End -->',
            pos,
        )
        return (self._load(data, body),)