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

# Copyright 2022-2023 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://itaku.ee/"""

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

BASE_PATTERN = r"(?:https?://)?itaku\.ee"


class ItakuExtractor(Extractor):
    """Base class for itaku extractors"""
    category = "itaku"
    root = "https://itaku.ee"
    directory_fmt = ("{category}", "{owner_username}")
    filename_fmt = ("{id}{title:? //}.{extension}")
    archive_fmt = "{id}"
    request_interval = (0.5, 1.5)

    def _init(self):
        self.api = ItakuAPI(self)
        self.videos = self.config("videos", True)

    def items(self):
        for post in self.posts():

            post["date"] = text.parse_datetime(
                post["date_added"], "%Y-%m-%dT%H:%M:%S.%fZ")
            for category, tags in post.pop("categorized_tags").items():
                post["tags_" + category.lower()] = [t["name"] for t in tags]
            post["tags"] = [t["name"] for t in post["tags"]]

            sections = []
            for s in post["sections"]:
                group = s["group"]
                if group:
                    sections.append(group["title"] + "/" + s["title"])
                else:
                    sections.append(s["title"])
            post["sections"] = sections

            if post["video"] and self.videos:
                url = post["video"]["video"]
            else:
                url = post["image"]

            yield Message.Directory, post
            yield Message.Url, url, text.nameext_from_url(url, post)


class ItakuGalleryExtractor(ItakuExtractor):
    """Extractor for posts from an itaku user gallery"""
    subcategory = "gallery"
    pattern = BASE_PATTERN + r"/profile/([^/?#]+)/gallery(?:/(\d+))?"
    example = "https://itaku.ee/profile/USER/gallery"

    def posts(self):
        return self.api.galleries_images(*self.groups)


class ItakuImageExtractor(ItakuExtractor):
    subcategory = "image"
    pattern = BASE_PATTERN + r"/images/(\d+)"
    example = "https://itaku.ee/images/12345"

    def posts(self):
        return (self.api.image(self.groups[0]),)


class ItakuSearchExtractor(ItakuExtractor):
    subcategory = "search"
    pattern = BASE_PATTERN + r"/home/images/?\?([^#]+)"
    example = "https://itaku.ee/home/images?tags=SEARCH"

    def posts(self):
        params = text.parse_query_list(self.groups[0])
        return self.api.search_images(params)


class ItakuAPI():

    def __init__(self, extractor):
        self.extractor = extractor
        self.root = extractor.root + "/api"
        self.headers = {
            "Accept": "application/json, text/plain, */*",
        }

    def search_images(self, params):
        endpoint = "/galleries/images/"
        required_tags = []
        negative_tags = []
        optional_tags = []

        tags = params.pop("tags", None)
        if not tags:
            tags = ()
        elif isinstance(tags, str):
            tags = (tags,)

        for tag in tags:
            if not tag:
                pass
            elif tag[0] == "-":
                negative_tags.append(tag[1:])
            elif tag[0] == "~":
                optional_tags.append(tag[1:])
            else:
                required_tags.append(tag)

        api_params = {
            "required_tags": required_tags,
            "negative_tags": negative_tags,
            "optional_tags": optional_tags,
            "date_range": "",
            "maturity_rating": ("SFW", "Questionable", "NSFW"),
            "ordering"  : "-date_added",
            "page"      : "1",
            "page_size" : "30",
            "visibility": ("PUBLIC", "PROFILE_ONLY"),
        }
        api_params.update(params)
        return self._pagination(endpoint, api_params, self.image)

    def galleries_images(self, username, section=None):
        endpoint = "/galleries/images/"
        params = {
            "cursor"    : None,
            "owner"     : self.user(username)["owner"],
            "sections"  : section,
            "date_range": "",
            "maturity_rating": ("SFW", "Questionable", "NSFW"),
            "ordering"  : "-date_added",
            "page"      : "1",
            "page_size" : "30",
            "visibility": ("PUBLIC", "PROFILE_ONLY"),
        }
        return self._pagination(endpoint, params, self.image)

    def image(self, image_id):
        endpoint = "/galleries/images/{}/".format(image_id)
        return self._call(endpoint)

    @memcache(keyarg=1)
    def user(self, username):
        return self._call("/user_profiles/{}/".format(username))

    def _call(self, endpoint, params=None):
        if not endpoint.startswith("http"):
            endpoint = self.root + endpoint
        response = self.extractor.request(
            endpoint, params=params, headers=self.headers)
        return response.json()

    def _pagination(self, endpoint, params, extend):
        data = self._call(endpoint, params)

        while True:
            if extend:
                for result in data["results"]:
                    yield extend(result["id"])
            else:
                yield from data["results"]

            url_next = data["links"].get("next")
            if not url_next:
                return

            data = self._call(url_next)
