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

# Copyright 2019-2025 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 https://blog.naver.com/"""

from .common import GalleryExtractor, Extractor, Message
from .. import text, util, dt
import time


class NaverBlogBase():
    """Base class for blog.naver.com extractors"""
    category = "naver-blog"
    root = "https://blog.naver.com"


class NaverBlogPostExtractor(NaverBlogBase, GalleryExtractor):
    """Extractor for blog posts on blog.naver.com"""
    subcategory = "post"
    filename_fmt = "{num:>03}.{extension}"
    directory_fmt = ("{category}", "{blog[user]} {blog[id]}",
                     "{post[date]:%Y-%m-%d} {post[title]}")
    archive_fmt = "{blog[id]}_{post[num]}_{num}"
    pattern = (r"(?:https?://)?blog\.naver\.com/"
               r"(?:PostView\.n(?:aver|hn)\?blogId=(\w+)&logNo=(\d+)|"
               r"(\w+)/(\d+)/?$)")
    example = "https://blog.naver.com/BLOGID/12345"

    def __init__(self, match):
        if blog_id := match[1]:
            self.blog_id = blog_id
            self.post_id = match[2]
        else:
            self.blog_id = match[3]
            self.post_id = match[4]

        url = (f"{self.root}/PostView.nhn"
               f"?blogId={self.blog_id}&logNo={self.post_id}")
        GalleryExtractor.__init__(self, match, url)

    def metadata(self, page):
        extr = text.extract_from(page)
        data = {
            "post": {
                "title"      : text.unescape(extr(
                    '"og:title" content="', '"')),
                "description": text.unescape(extr(
                    '"og:description" content="', '"')).replace(" ", " "),
                "num"        : text.parse_int(self.post_id),
            },
            "blog": {
                "id"         : self.blog_id,
                "num"        : text.parse_int(extr("var blogNo = '", "'")),
                "user"       : extr("var nickName = '", "'"),
            },
        }

        data["post"]["date"] = self._parse_datetime(
            extr('se_publishDate pcol2">', '<') or
            extr('_postAddDate">', '<'))

        return data

    def _parse_datetime(self, dt_string):
        if "전" in dt_string:
            ts = time.gmtime()
            return dt.datetime(ts.tm_year, ts.tm_mon, ts.tm_mday)
        return dt.parse(dt_string, "%Y. %m. %d. %H:%M")

    def images(self, page):
        files = []
        self._extract_images(files, page)
        if self.config("videos", True):
            self._extract_videos(files, page)
        return files

    def _extract_images(self, files, page):
        for url in text.extract_iter(page, 'data-lazy-src="', '"'):
            url = url.replace("://post", "://blog", 1).partition("?")[0]
            if "\ufffd" in text.unquote(url):
                url = text.unquote(url, encoding="EUC-KR")
            files.append((url, None))

    def _extract_videos(self, files, page):
        for module in text.extract_iter(page, " data-module='", "'"):
            if '"v2_video"' not in module:
                continue
            try:
                media = util.json_loads(module)["data"]
                self._extract_media(files, media)
            except Exception as exc:
                self.log.warning("%s: Failed to extract video '%s' (%s: %s)",
                                 self.post_id, media.get("vid"),
                                 exc.__class__.__name__, exc)

    def _extract_media(self, files, media):
        url = ("https://apis.naver.com/rmcnmv/rmcnmv/vod/play/v2.0/" +
               media["vid"])
        params = {
            "key"  : media["inkey"],
            "sid"  : "2",
            #  "pid": "00000000-0000-0000-0000-000000000000",
            "nonce": int(time.time()),
            "devt" : "html5_pc",
            "prv"  : "N",
            "aup"  : "N",
            "stpb" : "N",
            "cpl"  : "ko_KR",
            "providerEnv": "real",
            "adt"  : "glad",
            "lc"   : "ko_KR",
        }
        data = self.request_json(url, params=params)
        video = max(data["videos"]["list"],
                    key=lambda v: v.get("size") or 0)
        files.append((video["source"], video))


class NaverBlogBlogExtractor(NaverBlogBase, Extractor):
    """Extractor for a user's blog on blog.naver.com"""
    subcategory = "blog"
    categorytransfer = True
    pattern = (r"(?:https?://)?blog\.naver\.com/"
               r"(?:PostList\.n(?:aver|hn)\?(?:[^&#]+&)*blogId=([^&#]+)|"
               r"(\w+)/?$)")
    example = "https://blog.naver.com/BLOGID"

    def __init__(self, match):
        Extractor.__init__(self, match)
        self.blog_id = match[1] or match[2]

    def items(self):
        # fetch first post number
        url = f"{self.root}/PostList.nhn?blogId={self.blog_id}"
        post_num = text.extr(
            self.request(url).text, 'gnFirstLogNo = "', '"',
        )

        # setup params for API calls
        url = self.root + "/PostViewBottomTitleListAsync.nhn"
        params = {
            "blogId"             : self.blog_id,
            "logNo"              : post_num or "0",
            "viewDate"           : "",
            "categoryNo"         : "",
            "parentCategoryNo"   : "",
            "showNextPage"       : "true",
            "showPreviousPage"   : "false",
            "sortDateInMilli"    : "",
            "isThumbnailViewType": "false",
            "countPerPage"       : "",
        }

        # loop over all posts
        while True:
            data = self.request_json(url, params=params)

            for post in data["postList"]:
                post["url"] = (f"{self.root}/PostView.nhn?blogId="
                               f"{self.blog_id}&logNo={post['logNo']}")
                post["_extractor"] = NaverBlogPostExtractor
                yield Message.Queue, post["url"], post

            if not data["hasNextPage"]:
                return
            params["logNo"] = data["nextIndexLogNo"]
            params["sortDateInMilli"] = data["nextIndexSortDate"]