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

# Copyright 2016-2023 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://www.pixnet.net/"""

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

BASE_PATTERN = r"(?:https?://)?(?!www\.)([\w-]+)\.pixnet.net"


class PixnetExtractor(Extractor):
    """Base class for pixnet extractors"""
    category = "pixnet"
    filename_fmt = "{num:>03}_{id}.{extension}"
    archive_fmt = "{id}"

    def __init__(self, match):
        Extractor.__init__(self, match)
        self.blog, self.item_id = self.groups
        self.root = f"https://{self.blog}.pixnet.net"

    def items(self):
        url = self.url_fmt.format(self.root, self.item_id)
        page = self.request(url, encoding="utf-8").text
        user = text.extr(page, '<meta name="author" content="', '";')
        data = {
            "blog": self.blog,
            "user": user.rpartition(" (")[0],
        }

        for info in self._pagination(page):
            url, pos = text.extract(info, ' href="', '"')
            alt, pos = text.extract(info, ' alt="', '"', pos)
            item = {
                "id"        : text.parse_int(url.rpartition("/")[2]),
                "title"     : text.unescape(alt),
                "_extractor": (PixnetFolderExtractor if "/folder/" in url else
                               PixnetSetExtractor),
            }
            item.update(data)
            yield Message.Queue, url, item

    def _pagination(self, page):
        while True:
            yield from text.extract_iter(page, '<li id="', '</li>')

            pnext = text.extr(page, 'class="nextBtn"', '>')
            if pnext is None and 'name="albumpass">' in page:
                raise exception.AbortExtraction(
                    f"Album {self.item_id} is password-protected.")
            if "href" not in pnext:
                return
            url = self.root + text.extr(pnext, 'href="', '"')
            page = self.request(url, encoding="utf-8").text


class PixnetImageExtractor(PixnetExtractor):
    """Extractor for a single photo from pixnet.net"""
    subcategory = "image"
    filename_fmt = "{id}.{extension}"
    directory_fmt = ("{category}", "{blog}")
    pattern = BASE_PATTERN + r"/album/photo/(\d+)"
    example = "https://USER.pixnet.net/album/photo/12345"

    def items(self):
        url = "https://api.pixnet.cc/oembed"
        params = {
            "url": (f"https://{self.blog}.pixnet.net"
                    f"/album/photo/{self.item_id}"),
            "format": "json",
        }

        data = self.request_json(url, params=params)
        data["id"] = text.parse_int(
            data["url"].rpartition("/")[2].partition("-")[0])
        data["filename"], _, data["extension"] = data["title"].rpartition(".")
        data["blog"] = self.blog
        data["user"] = data.pop("author_name")

        yield Message.Directory, data
        yield Message.Url, data["url"], data


class PixnetSetExtractor(PixnetExtractor):
    """Extractor for images from a pixnet set"""
    subcategory = "set"
    directory_fmt = ("{category}", "{blog}",
                     "{folder_id} {folder_title}", "{set_id} {set_title}")
    pattern = BASE_PATTERN + r"/album/set/(\d+)"
    example = "https://USER.pixnet.net/album/set/12345"

    def items(self):
        url = f"{self.root}/album/set/{self.item_id}"
        page = self.request(url, encoding="utf-8").text
        data = self.metadata(page)

        yield Message.Directory, data
        for num, info in enumerate(self._pagination(page), 1):
            url, pos = text.extract(info, ' href="', '"')
            src, pos = text.extract(info, ' src="', '"', pos)
            alt, pos = text.extract(info, ' alt="', '"', pos)

            photo = {
                "id": text.parse_int(url.rpartition("/")[2].partition("#")[0]),
                "url": src.replace("_s.", "."),
                "num": num,
                "filename": alt,
                "extension": src.rpartition(".")[2],
            }
            photo.update(data)
            yield Message.Url, photo["url"], photo

    def metadata(self, page):
        user , pos = text.extract(page, '<meta name="author" content="', '";')
        _    , pos = text.extract(page, 'id="breadcrumb"', '', pos)
        fid  , pos = text.extract(page, '/folder/', '"', pos)
        fname, pos = text.extract(page, '>', '<', pos)
        sid  , pos = text.extract(page, '/set/', '"', pos)
        sname, pos = text.extract(page, '>', '<', pos)
        return {
            "blog": self.blog,
            "user": user.rpartition(" (")[0],
            "folder_id"   : text.parse_int(fid, ""),
            "folder_title": text.unescape(fname).strip(),
            "set_id"      : text.parse_int(sid),
            "set_title"   : text.unescape(sname),
        }


class PixnetFolderExtractor(PixnetExtractor):
    """Extractor for all sets in a pixnet folder"""
    subcategory = "folder"
    url_fmt = "{}/album/folder/{}"
    pattern = BASE_PATTERN + r"/album/folder/(\d+)"
    example = "https://USER.pixnet.net/album/folder/12345"


class PixnetUserExtractor(PixnetExtractor):
    """Extractor for all sets and folders of a pixnet user"""
    subcategory = "user"
    url_fmt = "{}{}/album/list"
    pattern = BASE_PATTERN + r"()(?:/blog|/album(?:/list)?)?/?(?:$|[?#])"
    example = "https://USER.pixnet.net/"
