"""
$description An online learning community for artists, created by artists.
$url schoolism.com
$type vod
$account Login and subscription required
"""

import logging
import re
from functools import partial

from streamlink.plugin import Plugin, pluginargument, pluginmatcher
from streamlink.plugin.api import useragents, validate
from streamlink.stream.hls import HLSStream
from streamlink.stream.http import HTTPStream

log = logging.getLogger(__name__)


@pluginmatcher(re.compile(
    r"https?://(?:www\.)?schoolism\.com/(viewAssignment|watchLesson)\.php"
))
@pluginargument(
    "email",
    required=True,
    requires=["password"],
    metavar="EMAIL",
    help="The email associated with your Schoolism account, required to access any Schoolism stream.",
)
@pluginargument(
    "password",
    sensitive=True,
    metavar="PASSWORD",
    help="A Schoolism account password to use with --schoolism-email.",
)
@pluginargument(
    "part",
    metavar="PART",
    type=int,
    default=1,
    help="""
        Play part number PART of the lesson, or assignment feedback video.

        Default is 1.
    """,
)
class Schoolism(Plugin):
    login_url = "https://www.schoolism.com/index.php"
    key_time_url = "https://www.schoolism.com/video-html/key-time.php"
    playlist_re = re.compile(r"var allVideos\s*=\s*(\[.*\]);", re.DOTALL)
    js_to_json = partial(re.compile(r'(?!<")(\w+):(?!/)').sub, r'"\1":')
    fix_brackets = partial(re.compile(r',\s*\}').sub, r'}')
    fix_colon_in_title = partial(re.compile(r'"title":""(.*?)":(.*?)"').sub, r'"title":"\1:\2"')
    playlist_schema = validate.Schema(
        validate.transform(playlist_re.search),
        validate.any(
            None,
            validate.all(
                validate.get(1),
                validate.transform(js_to_json),
                validate.transform(fix_brackets),  # remove invalid ,
                validate.transform(fix_colon_in_title),
                validate.parse_json(),
                [{
                    "sources": validate.all([{
                        validate.optional("playlistTitle"): validate.text,
                        "title": validate.text,
                        "src": validate.text,
                        "type": validate.text,
                    }],
                        # only include HLS streams
                        # validate.filter(lambda s: s["type"] == "application/x-mpegurl")
                    )
                }]
            )
        )
    )

    def login(self, email, password):
        """
        Login to the schoolism account and return the users account
        :param email: (str) email for account
        :param password: (str) password for account
        :return: (str) users email
        """
        if self.options.get("email") and self.options.get("password"):
            res = self.session.http.post(self.login_url, data={"email": email,
                                                               "password": password,
                                                               "redirect": None,
                                                               "submit": "Login"})

            if res.cookies.get("password") and res.cookies.get("email"):
                return res.cookies.get("email")
            else:
                log.error("Failed to login to Schoolism, incorrect email/password combination")
        else:
            log.error("An email and password are required to access Schoolism streams")

    def _get_streams(self):
        user = self.login(self.options.get("email"), self.options.get("password"))
        if user:
            log.debug(f"Logged in to Schoolism as {user}")
            res = self.session.http.get(self.url, headers={"User-Agent": useragents.SAFARI_8})
            lesson_playlist = self.playlist_schema.validate(res.text)

            part = self.options.get("part")
            video_type = "Lesson" if "lesson" in self.match.group(1).lower() else "Assignment Feedback"

            log.info(f"Attempting to play {video_type} Part {part}")
            found = False

            # make request to key-time api, to get key specific headers
            _ = self.session.http.get(self.key_time_url, headers={"User-Agent": useragents.SAFARI_8})

            for i, video in enumerate(lesson_playlist, 1):
                if video["sources"] and i == part:
                    found = True
                    for source in video["sources"]:
                        if source['type'] == "video/mp4":
                            yield "live", HTTPStream(self.session, source["src"],
                                                     headers={"User-Agent": useragents.SAFARI_8,
                                                              "Referer": self.url})
                        elif source['type'] == "application/x-mpegurl":
                            yield from HLSStream.parse_variant_playlist(
                                self.session,
                                source["src"],
                                headers={
                                    "User-Agent": useragents.SAFARI_8,
                                    "Referer": self.url
                                }
                            ).items()

            if not found:
                log.error(f"Could not find {video_type} Part {part}")


__plugin__ = Schoolism
