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

# Copyright 2021 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://kemono.party/"""

from .common import Extractor, Message
from .. import text, exception
from ..cache import cache
import itertools
import re

BASE_PATTERN = r"(?:https?://)?(?:www\.)?kemono\.party"
USER_PATTERN = BASE_PATTERN + r"/([^/?#]+)/user/([^/?#]+)"


class KemonopartyExtractor(Extractor):
    """Base class for kemonoparty extractors"""
    category = "kemonoparty"
    root = "https://kemono.party"
    directory_fmt = ("{category}", "{service}", "{user}")
    filename_fmt = "{id}_{title}_{num:>02}_{filename}.{extension}"
    archive_fmt = "{service}_{user}_{id}_{num}"
    cookiedomain = ".kemono.party"

    def items(self):
        self._prepare_ddosguard_cookies()

        self._find_inline = re.compile(
            r'src="(?:https?://kemono\.party)?(/inline/[^"]+'
            r'|/[0-9a-f]{2}/[0-9a-f]{2}/[0-9a-f]{64}\.[^"]+)').findall
        find_hash = re.compile("/[0-9a-f]{2}/[0-9a-f]{2}/([0-9a-f]{64})").match
        generators = self._build_file_generators(self.config("files"))
        comments = self.config("comments")
        username = dms = None

        if self.config("metadata"):
            username = text.unescape(text.extract(
                self.request(self.user_url).text,
                '<meta name="artist_name" content="', '"')[0])
        if self.config("dms"):
            dms = True

        posts = self.posts()
        max_posts = self.config("max-posts")
        if max_posts:
            posts = itertools.islice(posts, max_posts)

        for post in posts:

            post["date"] = text.parse_datetime(
                post["published"] or post["added"],
                "%a, %d %b %Y %H:%M:%S %Z")
            if username:
                post["username"] = username
            if comments:
                post["comments"] = self._extract_comments(post)
            if dms is not None:
                if dms is True:
                    dms = self._extract_dms(post)
                post["dms"] = dms
            yield Message.Directory, post

            hashes = set()
            post["num"] = 0
            for file in itertools.chain.from_iterable(
                    g(post) for g in generators):
                url = file["path"]

                match = find_hash(url)
                if match:
                    post["hash"] = hash = match.group(1)
                    if hash in hashes:
                        self.log.debug("Skipping %s (duplicate)", url)
                        continue
                    hashes.add(hash)
                else:
                    post["hash"] = ""

                post["type"] = file["type"]
                post["num"] += 1

                if url[0] == "/":
                    url = self.root + "/data" + url
                elif url.startswith("https://kemono.party"):
                    url = self.root + "/data" + url[20:]

                text.nameext_from_url(file["name"], post)
                yield Message.Url, url, post

    def login(self):
        username, password = self._get_auth_info()
        if username:
            self._update_cookies(self._login_impl(username, password))

    @cache(maxage=28*24*3600, keyarg=1)
    def _login_impl(self, username, password):
        self.log.info("Logging in as %s", username)

        url = self.root + "/account/login"
        data = {"username": username, "password": password}

        response = self.request(url, method="POST", data=data)
        if response.url.endswith("/account/login") and \
                "Username or password is incorrect" in response.text:
            raise exception.AuthenticationError()

        return {c.name: c.value for c in response.history[0].cookies}

    def _file(self, post):
        file = post["file"]
        if not file:
            return ()
        file["type"] = "file"
        return (file,)

    def _attachments(self, post):
        for attachment in post["attachments"]:
            attachment["type"] = "attachment"
        return post["attachments"]

    def _inline(self, post):
        for path in self._find_inline(post["content"] or ""):
            yield {"path": path, "name": path, "type": "inline"}

    def _build_file_generators(self, filetypes):
        if filetypes is None:
            return (self._file, self._attachments, self._inline)
        genmap = {
            "file"       : self._file,
            "attachments": self._attachments,
            "inline"     : self._inline,
        }
        if isinstance(filetypes, str):
            filetypes = filetypes.split(",")
        return [genmap[ft] for ft in filetypes]

    def _extract_comments(self, post):
        url = "{}/{}/user/{}/post/{}".format(
            self.root, post["service"], post["user"], post["id"])
        page = self.request(url).text

        comments = []
        for comment in text.extract_iter(page, "<article", "</article>"):
            extr = text.extract_from(comment)
            cid = extr('id="', '"')
            comments.append({
                "id"  : cid,
                "user": extr('href="#' + cid + '"', '</').strip(" \n\r>"),
                "body": extr(
                    '<section class="comment__body">', '</section>').strip(),
                "date": extr('datetime="', '"'),
            })
        return comments

    def _extract_dms(self, post):
        url = "{}/{}/user/{}/dms".format(
            self.root, post["service"], post["user"])
        page = self.request(url).text

        dms = []
        for dm in text.extract_iter(page, "<article", "</article>"):
            dms.append({
                "body": text.unescape(text.extract(
                    dm, '<div class="dm-card__content">', '</div>',
                )[0].strip()),
                "date": text.extract(dm, 'datetime="', '"')[0],
            })
        return dms


class KemonopartyUserExtractor(KemonopartyExtractor):
    """Extractor for all posts from a kemono.party user listing"""
    subcategory = "user"
    pattern = USER_PATTERN + r"/?(?:\?o=(\d+))?(?:$|[?#])"
    test = (
        ("https://kemono.party/fanbox/user/6993449", {
            "range": "1-25",
            "count": 25,
        }),
        # 'max-posts' option, 'o' query parameter (#1674)
        ("https://kemono.party/patreon/user/881792?o=150", {
            "options": (("max-posts", 25),),
            "count": "< 100",
        }),
        ("https://kemono.party/subscribestar/user/alcorart"),
    )

    def __init__(self, match):
        KemonopartyExtractor.__init__(self, match)
        service, user_id, offset = match.groups()
        self.api_url = "{}/api/{}/user/{}".format(self.root, service, user_id)
        self.user_url = "{}/{}/user/{}".format(self.root, service, user_id)
        self.offset = text.parse_int(offset)

    def posts(self):
        url = self.api_url
        params = {"o": self.offset}

        while True:
            posts = self.request(url, params=params).json()
            yield from posts

            if len(posts) < 25:
                return
            params["o"] += 25


class KemonopartyPostExtractor(KemonopartyExtractor):
    """Extractor for a single kemono.party post"""
    subcategory = "post"
    pattern = USER_PATTERN + r"/post/([^/?#]+)"
    test = (
        ("https://kemono.party/fanbox/user/6993449/post/506575", {
            "pattern": r"https://kemono.party/data/21/0f"
                       r"/210f35388e28bbcf756db18dd516e2d82ce75[0-9a-f]+\.jpg",
            "keyword": {
                "added": "Wed, 06 May 2020 20:28:02 GMT",
                "content": str,
                "date": "dt:2019-08-11 02:09:04",
                "edited": None,
                "embed": dict,
                "extension": "jpeg",
                "filename": "P058kDFYus7DbqAkGlfWTlOr",
                "hash": "210f35388e28bbcf756db18dd516e2d8"
                        "2ce758e0d32881eeee76d43e1716d382",
                "id": "506575",
                "num": 1,
                "published": "Sun, 11 Aug 2019 02:09:04 GMT",
                "service": "fanbox",
                "shared_file": False,
                "subcategory": "post",
                "title": "c96取り置き",
                "type": "file",
                "user": "6993449",
            },
        }),
        # inline image (#1286)
        ("https://kemono.party/fanbox/user/7356311/post/802343", {
            "pattern": r"https://kemono\.party/data/47/b5/47b5c014ecdcfabdf2c8"
                       r"5eec53f1133a76336997ae8596f332e97d956a460ad2\.jpg",
            "keyword": {"hash": "47b5c014ecdcfabdf2c85eec53f1133a"
                                "76336997ae8596f332e97d956a460ad2"},
        }),
        # kemono.party -> data.kemono.party
        ("https://kemono.party/gumroad/user/trylsc/post/IURjT", {
            "pattern": r"https://kemono\.party/data/("
                       r"files/gumroad/trylsc/IURjT/reward8\.jpg|"
                       r"c6/04/c6048f5067fd9dbfa7a8be565ac194efdfb6e4.+\.zip)",
        }),
        # username (#1548, #1652)
        ("https://kemono.party/gumroad/user/3252870377455/post/aJnAH", {
            "options": (("metadata", True),),
            "keyword": {"username": "Kudalyn's Creations"},
        }),
        # skip patreon duplicates
        ("https://kemono.party/patreon/user/4158582/post/32099982", {
            "count": 2,
        }),
        # DMs (#2008)
        ("https://kemono.party/patreon/user/34134344/post/38129255", {
            "options": (("dms", True),),
            "keyword": {"dms": [{
                "body": r"re:Hi! Thank you very much for supporting the work I"
                        r" did in May. Here's your reward pack! I hope you fin"
                        r"d something you enjoy in it. :\)\n\nhttps://www.medi"
                        r"afire.com/file/\w+/Set13_tier_2.zip/file",
                "date": "2021-07-31 02:47:51.327865",
            }]},
        }),
        ("https://kemono.party/subscribestar/user/alcorart/post/184330"),
        ("https://www.kemono.party/subscribestar/user/alcorart/post/184330"),
    )

    def __init__(self, match):
        KemonopartyExtractor.__init__(self, match)
        service, user_id, post_id = match.groups()
        self.api_url = "{}/api/{}/user/{}/post/{}".format(
            self.root, service, user_id, post_id)
        self.user_url = "{}/{}/user/{}".format(self.root, service, user_id)

    def posts(self):
        posts = self.request(self.api_url).json()
        return (posts[0],) if len(posts) > 1 else posts


class KemonopartyDiscordExtractor(KemonopartyExtractor):
    """Extractor for kemono.party discord servers"""
    subcategory = "discord"
    directory_fmt = ("{category}", "discord", "{server}",
                     "{channel_name|channel}")
    filename_fmt = "{id}_{num:>02}_{filename}.{extension}"
    archive_fmt = "discord_{server}_{id}_{num}"
    pattern = BASE_PATTERN + r"/discord/server/(\d+)(?:/channel/(\d+))?#(.*)"
    test = (
        (("https://kemono.party/discord"
          "/server/488668827274444803#finish-work"), {
            "count": 4,
            "keyword": {"channel_name": "finish-work"},
        }),
        (("https://kemono.party/discord"
          "/server/256559665620451329/channel/462437519519383555#"), {
            "pattern": r"https://kemono\.party/data/attachments/discord"
                       r"/256559665620451329/\d+/\d+/.+",
            "count": ">= 2",
        }),
        # 'inline' files
        (("https://kemono.party/discord"
          "/server/315262215055736843/channel/315262215055736843#general"), {
            "pattern": r"https://cdn\.discordapp\.com/attachments/\d+/\d+/.+$",
            "range": "1-5",
            "options": (("image-filter", "type == 'inline'"),),
        }),
    )

    def __init__(self, match):
        KemonopartyExtractor.__init__(self, match)
        self.server, self.channel, self.channel_name = match.groups()

    def items(self):
        self._prepare_ddosguard_cookies()

        find_inline = re.compile(
            r"https?://(?:cdn\.discordapp.com|media\.discordapp\.net)"
            r"(/[A-Za-z0-9-._~:/?#\[\]@!$&'()*+,;%=]+)").findall

        posts = self.posts()
        max_posts = self.config("max-posts")
        if max_posts:
            posts = itertools.islice(posts, max_posts)

        for post in posts:
            files = []
            append = files.append
            for attachment in post["attachments"]:
                attachment["type"] = "attachment"
                append(attachment)
            for path in find_inline(post["content"] or ""):
                append({"path": "https://cdn.discordapp.com" + path,
                        "name": path, "type": "inline"})

            post["channel_name"] = self.channel_name
            post["date"] = text.parse_datetime(
                post["published"], "%a, %d %b %Y %H:%M:%S %Z")
            yield Message.Directory, post

            for post["num"], file in enumerate(files, 1):
                post["type"] = file["type"]
                url = file["path"]
                if url[0] == "/":
                    url = self.root + "/data" + url
                elif url.startswith("https://kemono.party"):
                    url = self.root + "/data" + url[20:]

                text.nameext_from_url(file["name"], post)
                yield Message.Url, url, post

    def posts(self):
        if self.channel is None:
            url = "{}/api/discord/channels/lookup?q={}".format(
                self.root, self.server)
            for channel in self.request(url).json():
                if channel["name"] == self.channel_name:
                    self.channel = channel["id"]
                    break
            else:
                raise exception.NotFoundError("channel")

        url = "{}/api/discord/channel/{}".format(self.root, self.channel)
        params = {"skip": 0}

        while True:
            posts = self.request(url, params=params).json()
            yield from posts

            if len(posts) < 25:
                break
            params["skip"] += 25


class KemonopartyDiscordServerExtractor(KemonopartyExtractor):
    subcategory = "discord-server"
    pattern = BASE_PATTERN + r"/discord/server/(\d+)$"
    test = ("https://kemono.party/discord/server/488668827274444803", {
        "pattern": KemonopartyDiscordExtractor.pattern,
        "count": 13,
    })

    def __init__(self, match):
        KemonopartyExtractor.__init__(self, match)
        self.server = match.group(1)

    def items(self):
        url = "{}/api/discord/channels/lookup?q={}".format(
            self.root, self.server)
        channels = self.request(url).json()

        for channel in channels:
            url = "{}/discord/server/{}/channel/{}#{}".format(
                self.root, self.server, channel["id"], channel["name"])
            channel["_extractor"] = KemonopartyDiscordExtractor
            yield Message.Queue, url, channel


class KemonopartyFavoriteExtractor(KemonopartyExtractor):
    """Extractor for kemono.party favorites"""
    subcategory = "favorite"
    pattern = BASE_PATTERN + r"/favorites"
    test = ("https://kemono.party/favorites", {
        "pattern": KemonopartyUserExtractor.pattern,
        "url": "f4b5b796979bcba824af84206578c79101c7f0e1",
        "count": 3,
    })

    def items(self):
        self._prepare_ddosguard_cookies()
        self.login()

        users = self.request(self.root + "/api/favorites").json()
        for user in users:
            user["_extractor"] = KemonopartyUserExtractor
            url = "{}/{}/user/{}".format(
                self.root, user["service"], user["id"])
            yield Message.Queue, url, user