import datetime
import hashlib
import logging
import os
import time
from abc import ABC, abstractmethod
from typing import Generator, Sequence, Tuple, Union

import requests
import tidalapi
from dogpile.cache import make_region

from .constants import (
    AGENT,
    CACHE_DIR,
    DEEZER_MAX_Q,
    DEEZER_Q_IDS,
    QOBUZ_FEATURED_KEYS,
    TIDAL_MAX_Q,
    TIDAL_Q_IDS,
)
from .exceptions import (
    AuthenticationError,
    IneligibleError,
    InvalidAppIdError,
    InvalidAppSecretError,
    InvalidQuality,
)
from .spoofbuz import Spoofer

os.makedirs(CACHE_DIR, exist_ok=True)
region = make_region().configure(
    "dogpile.cache.dbm",
    arguments={"filename": os.path.join(CACHE_DIR, "clients.db")},
)

logger = logging.getLogger(__name__)

TRACK_CACHE_TIME = datetime.timedelta(weeks=2).total_seconds()
RELEASE_CACHE_TIME = datetime.timedelta(days=1).total_seconds()

# Qobuz
QOBUZ_BASE = "https://www.qobuz.com/api.json/0.2"


# Deezer
DEEZER_BASE = "https://api.deezer.com"
DEEZER_DL = "http://dz.loaderapp.info/deezer"


# ----------- Abstract Classes -----------------


class ClientInterface(ABC):
    """Common API for clients of all platforms.

    This is an Abstract Base Class. It cannot be instantiated;
    it is merely a template.
    """

    @abstractmethod
    def login(self, **kwargs):
        """Authenticate the client.

        :param kwargs:
        """
        pass

    @abstractmethod
    def search(self, query: str, media_type="album"):
        """Search API for query.

        :param query:
        :type query: str
        :param type_:
        """
        pass

    @abstractmethod
    def get(self, item_id, media_type="album"):
        """Get metadata.

        :param meta_id:
        :param type_:
        """
        pass

    @abstractmethod
    def get_file_url(self, track_id, quality=6) -> Union[dict]:
        """Get the direct download url dict for a file.

        :param track_id: id of the track
        """
        pass

    @property
    @abstractmethod
    def source(self):
        pass


# ------------- Clients -----------------


class QobuzClient(ClientInterface):
    # ------- Public Methods -------------
    def __init__(self):
        self.logged_in = False

    def login(self, email: str, pwd: str, **kwargs):
        """Authenticate the QobuzClient. Must have a paid membership.

        If `app_id` and `secrets` are not provided, this will run the
        Spoofer script, which retrieves them. This will take some time,
        so it is recommended to cache them somewhere for reuse.

        :param email: email for the qobuz account
        :type email: str
        :param pwd: password for the qobuz account
        :type pwd: str
        :param kwargs: app_id: str, secrets: list, return_secrets: bool
        """
        if self.logged_in:
            logger.debug("Already logged in")
            return

        if (kwargs.get("app_id") or kwargs.get("secrets")) in (None, [], ""):
            logger.info("Fetching tokens from Qobuz")
            spoofer = Spoofer()
            kwargs["app_id"] = spoofer.get_app_id()
            kwargs["secrets"] = spoofer.get_secrets()

        self.app_id = str(kwargs["app_id"])  # Ensure it is a string
        self.secrets = kwargs["secrets"]

        self.session = requests.Session()
        self.session.headers.update(
            {
                "User-Agent": AGENT,
                "X-App-Id": self.app_id,
            }
        )

        self._api_login(email, pwd)
        logger.debug("Logged into Qobuz")
        self._validate_secrets()
        logger.debug("Qobuz client is ready to use")

        self.logged_in = True

    def get_tokens(self) -> Tuple[str, Sequence[str]]:
        return self.app_id, self.secrets

    def search(
        self, query: str, media_type: str = "album", limit: int = 500
    ) -> Generator:
        """Search the qobuz API.

        If 'featured' is given as media type, this will retrieve results
        from the featured albums in qobuz. The queries available with this type
        are:

            * most-streamed
            * recent-releases
            * best-sellers
            * press-awards
            * ideal-discography
            * editor-picks
            * most-featured
            * qobuzissims
            * new-releases
            * new-releases-full
            * harmonia-mundi
            * universal-classic
            * universal-jazz
            * universal-jeunesse
            * universal-chanson

        :param query:
        :type query: str
        :param media_type:
        :type media_type: str
        :param limit:
        :type limit: int
        :rtype: Generator
        """
        return self._api_search(query, media_type, limit)

    @region.cache_on_arguments(expiration_time=RELEASE_CACHE_TIME)
    def get(self, item_id: Union[str, int], media_type: str = "album") -> dict:
        return self._api_get(media_type, item_id=item_id)

    def get_file_url(self, item_id, quality=6) -> dict:
        return self._api_get_file_url(item_id, quality=quality)

    @property
    def source(self):
        return "qobuz"

    # ---------- Private Methods ---------------

    # Credit to Sorrow446 for the original methods

    def _gen_pages(self, epoint: str, params: dict) -> dict:
        page, status_code = self._api_request(epoint, params)
        logger.debug("Keys returned from _gen_pages: %s", ", ".join(page.keys()))
        key = epoint.split("/")[0] + "s"
        total = page.get(key, {})
        total = total.get("total") or total.get("items")

        if not total:
            logger.debug("Nothing found from %s epoint", epoint)
            return

        limit = page.get(key, {}).get("limit", 500)
        offset = page.get(key, {}).get("offset", 0)
        params.update({"limit": limit})
        yield page
        while (offset + limit) < total:
            offset += limit
            params.update({"offset": offset})
            page, status_code = self._api_request(epoint, params)
            yield page

    def _validate_secrets(self):
        for secret in self.secrets:
            if self._test_secret(secret):
                self.sec = secret
                logger.debug("Working secret and app_id: %s - %s", secret, self.app_id)
                break
        if not hasattr(self, "sec"):
            raise InvalidAppSecretError(f"Invalid secrets: {self.secrets}")

    def _api_get(self, media_type: str, **kwargs) -> dict:
        item_id = kwargs.get("item_id")

        params = {
            "app_id": self.app_id,
            f"{media_type}_id": item_id,
            "limit": kwargs.get("limit", 500),
            "offset": kwargs.get("offset", 0),
        }
        extras = {
            "artist": "albums",
            "playlist": "tracks",
            "label": "albums",  # not tested
        }

        if media_type in extras:
            params.update({"extra": extras[media_type]})

        epoint = f"{media_type}/get"

        response, status_code = self._api_request(epoint, params)
        return response

    def _api_search(self, query, media_type, limit=500) -> Generator:
        params = {
            "query": query,
            "limit": limit,
        }
        # TODO: move featured, favorites, and playlists into _api_get later
        if media_type == "featured":
            assert query in QOBUZ_FEATURED_KEYS, f'query "{query}" is invalid.'
            params.update({"type": query})
            del params["query"]
            epoint = "album/getFeatured"

        elif query == "user-favorites":
            assert query in ("track", "artist", "album")
            params.update({"type": f"{media_type}s"})
            epoint = "favorite/getUserFavorites"

        elif query == "user-playlists":
            epoint = "playlist/getUserPlaylists"

        else:
            epoint = f"{media_type}/search"

        return self._gen_pages(epoint, params)

    def _api_login(self, email: str, pwd: str):
        # usr_info = self._api_call("user/login", email=email, pwd=pwd)
        params = {
            "email": email,
            "password": pwd,
            "app_id": self.app_id,
        }
        epoint = "user/login"
        resp, status_code = self._api_request(epoint, params)

        if status_code == 401:
            raise AuthenticationError(f"Invalid credentials from params {params}")
        elif status_code == 400:
            raise InvalidAppIdError(f"Invalid app id from params {params}")
        else:
            logger.info("Logged in to Qobuz")

        if not resp["user"]["credential"]["parameters"]:
            raise IneligibleError("Free accounts are not eligible to download tracks.")

        self.uat = resp["user_auth_token"]
        self.session.headers.update({"X-User-Auth-Token": self.uat})
        self.label = resp["user"]["credential"]["parameters"]["short_label"]

    def _api_get_file_url(
        self, track_id: Union[str, int], quality: int = 6, sec: str = None
    ) -> dict:
        unix_ts = time.time()

        if int(quality) not in (5, 6, 7, 27):  # Needed?
            raise InvalidQuality(f"Invalid quality id {quality}. Choose 5, 6, 7 or 27")

        if sec is not None:
            secret = sec
        elif hasattr(self, "sec"):
            secret = self.sec
        else:
            raise InvalidAppSecretError("Cannot find app secret")

        r_sig = f"trackgetFileUrlformat_id{quality}intentstreamtrack_id{track_id}{unix_ts}{secret}"
        logger.debug("Raw request signature: %s", r_sig)
        r_sig_hashed = hashlib.md5(r_sig.encode("utf-8")).hexdigest()
        logger.debug("Hashed request signature: %s", r_sig_hashed)

        params = {
            "request_ts": unix_ts,
            "request_sig": r_sig_hashed,
            "track_id": track_id,
            "format_id": quality,
            "intent": "stream",
        }
        response, status_code = self._api_request("track/getFileUrl", params)
        if status_code == 400:
            raise InvalidAppSecretError("Invalid app secret from params %s" % params)

        return response

    def _api_request(self, epoint: str, params: dict) -> Tuple[dict, int]:
        logging.debug(f"Calling API with endpoint {epoint} params {params}")
        r = self.session.get(f"{QOBUZ_BASE}/{epoint}", params=params)
        try:
            return r.json(), r.status_code
        except Exception:
            logger.error("Problem getting JSON. Status code: %s", r.status_code)
            raise

    def _test_secret(self, secret: str) -> bool:
        try:
            self._api_get_file_url("19512574", sec=secret)
            return True
        except InvalidAppSecretError as error:
            logger.debug("Test for %s secret didn't work: %s", secret, error)
            return False


class DeezerClient(ClientInterface):
    def __init__(self):
        self.session = requests.Session()
        self.logged_in = True

    def search(self, query: str, media_type: str = "album", limit: int = 200) -> dict:
        """Search API for query.

        :param query:
        :type query: str
        :param media_type:
        :type media_type: str
        :param limit:
        :type limit: int
        """
        # TODO: more robust url sanitize
        query = query.replace(" ", "+")

        if media_type.endswith("s"):
            media_type = media_type[:-1]

        # TODO: use limit parameter
        response = self.session.get(f"{DEEZER_BASE}/search/{media_type}?q={query}")
        response.raise_for_status()

        return response.json()

    def login(self, **kwargs):
        logger.debug("Deezer does not require login call, returning")

    @region.cache_on_arguments(expiration_time=RELEASE_CACHE_TIME)
    def get(self, meta_id: Union[str, int], media_type: str = "album"):
        """Get metadata.

        :param meta_id:
        :type meta_id: Union[str, int]
        :param type_:
        :type type_: str
        """
        url = f"{DEEZER_BASE}/{media_type}/{meta_id}"
        item = self.session.get(url).json()
        if media_type in ("album", "playlist"):
            tracks = self.session.get(f"{url}/tracks").json()
            item["tracks"] = tracks["data"]
            item["track_total"] = len(tracks["data"])
        elif media_type == "artist":
            albums = self.session.get(f"{url}/albums").json()
            item["albums"] = albums["data"]

        return item

    @staticmethod
    def get_file_url(meta_id: Union[str, int], quality: int = 6):
        quality = min(DEEZER_MAX_Q, quality)
        url = f"{DEEZER_DL}/{DEEZER_Q_IDS[quality]}/{DEEZER_BASE}/track/{meta_id}"
        logger.debug(f"Download url {url}")
        return url

    @property
    def source(self):
        return "deezer"


class TidalClient(ClientInterface):
    def __init__(self):
        self.logged_in = False

    def login(self, email: str, pwd: str):
        if self.logged_in:
            return

        config = tidalapi.Config()

        self.session = tidalapi.Session(config=config)
        self.session.login(email, pwd)
        logger.info("Logged into Tidal")

        self.logged_in = True

    @region.cache_on_arguments(expiration_time=RELEASE_CACHE_TIME)
    def search(self, query: str, media_type: str = "album", limit: int = 50):
        """
        :param query:
        :type query: str
        :param media_type: artist, album, playlist, or track
        :type media_type: str
        :param limit:
        :type limit: int
        :raises ValueError: if field value is invalid
        """

        return self._search(query, media_type, limit=limit)

    @region.cache_on_arguments(expiration_time=RELEASE_CACHE_TIME)
    def get(self, meta_id: Union[str, int], media_type: str = "album"):
        """Get metadata.

        :param meta_id:
        :type meta_id: Union[str, int]
        :param media_type:
        :type media_type: str
        """
        return self._get(meta_id, media_type)

    def get_file_url(self, meta_id: Union[str, int], quality: int = 6):
        """
        :param meta_id:
        :type meta_id: Union[str, int]
        :param quality:
        :type quality: int
        """
        logger.debug(f"Fetching file url with quality {quality}")
        return self._get_file_url(meta_id, quality=min(TIDAL_MAX_Q, quality))

    @property
    def source(self):
        return "tidal"

    def _search(self, query, media_type="album", **kwargs):
        params = {
            "query": query,
            "limit": kwargs.get("limit", 50),
        }
        return self.session.request("GET", f"search/{media_type}s", params).json()

    def _get(self, media_id, media_type="album"):
        if media_type == "album":
            info = self.session.request("GET", f"albums/{media_id}")
            tracklist = self.session.request("GET", f"albums/{media_id}/tracks")
            album = info.json()
            album["tracks"] = tracklist.json()
            return album

        elif media_type == "track":
            return self.session.request("GET", f"tracks/{media_id}").json()
        elif media_type == "playlist":
            return self.session.request("GET", f"playlists/{media_id}/tracks").json()
        elif media_type == "artist":
            return self.session.request("GET", f"artists/{media_id}/albums").json()
        else:
            raise ValueError

    def _get_file_url(self, track_id, quality=6):
        params = {"soundQuality": TIDAL_Q_IDS[quality]}
        resp = self.session.request("GET", f"tracks/{track_id}/streamUrl", params)
        resp.raise_for_status()
        return resp.json()