#!/usr/bin/env python3


# SAT: a jabber client
# Copyright (C) 2009-2020 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""Objects handling bridge data, with jinja2 safe markup handling"""

from sat.core.constants import Const as C
from sat.tools.common import data_format

try:
    from jinja2 import Markup as safe
except ImportError:
    safe = str

from sat.tools.common import uri as xmpp_uri
import urllib.request, urllib.parse, urllib.error

q = lambda value: urllib.parse.quote(value.encode("utf-8"), safe="@")


def parsePubSubMetadata(metadata, items):
    """Helper method to have nicer metadata while doing a PubSub request

    The "rsm_index" and "rsm_count" keys will be converted to int
    The "mam_stable" and "mam_complete" keys will be converted to boolean
    A "complete" key can have the following values:
        - True: we are on the last page, i.e. last items have been received
        - False: we are not on the last page
        - None: we don't have enough data fo know our position in the pagination
    @param metadata(dict): dict retrieved fro bridge with request metadata
    @param items(list): items retrieved (used to determine "complete" value)
    @return (dict): parsed metadata
    """
    data = {}
    assert "complete" not in metadata

    for key, value in metadata.items():
        if key in ("rsm_index", "rsm_count"):
            value = int(value)
        elif key == "mam_stable":
            value = C.bool(value)
        elif key == "mam_complete":
            key = "complete"
            value = C.bool(value)
        data[key] = value
    if "complete" not in data:
        index = data.get("rsm_index")
        count = data.get("rsm_count")
        if index is None or count is None:
            # we don't have enough information to know if the data is complete or not
            data["complete"] = None
        else:
            # normally we have a strict equality here but XEP-0059 states
            # that index MAY be approximative, so just in case…
            data["complete"] = index + len(items) >= count
    return data


class BlogItem(object):
    def __init__(self, mb_data, parent, deserialise=True):
        """
        @param deserialise(bool): if True, mb_data is a serialised string which must
          be deserialised
        """
        # FIXME: deserialise should not be done here, but before BlogItem is called
        if deserialise:
            self.mb_data = data_format.deserialise(mb_data)
        else:
            self.mb_data = mb_data
        self.parent = parent
        self._comments = None
        self._comments_items_list = None

    @property
    def id(self):
        return self.mb_data.get("id")

    @property
    def atom_id(self):
        return self.mb_data.get("atom_id")

    @property
    def uri(self):
        node = self.parent.node
        service = self.parent.service
        return xmpp_uri.buildXMPPUri(
            "pubsub", subtype="microblog", path=service, node=node, item=self.id
        )

    @property
    def published(self):
        return self.mb_data.get("published")

    @property
    def updated(self):
        return self.mb_data.get("updated")

    @property
    def language(self):
        return self.mb_data.get("language")

    @property
    def author(self):
        return self.mb_data.get("author")

    @property
    def author_jid(self):
        return self.mb_data.get("author_jid")

    @property
    def author_jid_verified(self):
        return self.mb_data.get("author_jid_verified")

    @property
    def author_email(self):
        return self.mb_data.get("author_email")

    @property
    def tags(self):
        return self.mb_data.get('tags', [])

    @property
    def groups(self):
        return self.mb_data.get('groups', [])

    @property
    def title(self):
        return self.mb_data.get("title")

    @property
    def title_xhtml(self):
        try:
            return safe(self.mb_data["title_xhtml"])
        except KeyError:
            return None

    @property
    def content(self):
        return self.mb_data.get("content")

    @property
    def content_xhtml(self):
        try:
            return safe(self.mb_data["content_xhtml"])
        except KeyError:
            return None

    @property
    def comments(self):
        if self._comments is None:
            self._comments = data_format.dict2iterdict(
                "comments", self.mb_data, ("node", "service")
            )
        return self._comments

    @property
    def comments_service(self):
        return self.mb_data.get("comments_service")

    @property
    def comments_node(self):
        return self.mb_data.get("comments_node")

    @property
    def comments_items_list(self):
        return [] if self._comments_items_list is None else self._comments_items_list

    def appendCommentsItems(self, items):
        """append comments items to self.comments_items"""
        if self._comments_items_list is None:
            self._comments_items_list = []
        self._comments_items_list.append(items)


class BlogItems(object):
    def __init__(self, mb_data, deserialise=True):
        """
        @param deserialise(bool): if True, mb_data is a serialised string which must
          be deserialised
        """
        # FIXME: deserialise should not be done here, but before BlogItem is called
        self.items = [BlogItem(i, self, deserialise=deserialise) for i in mb_data[0]]
        self.metadata = parsePubSubMetadata(mb_data[1], self.items)

    @property
    def service(self):
        return self.metadata["service"]

    @property
    def node(self):
        return self.metadata["node"]

    @property
    def uri(self):
        return self.metadata["uri"]

    @property
    def with_rsm(self):
        """Return True if RSM is activated on this request"""
        return "rsm_first" in self.metadata

    @property
    def rsm_first(self):
        return self.metadata["rsm_first"]

    @property
    def rsm_last(self):
        return self.metadata["rsm_last"]

    @property
    def rsm_index(self):
        return self.metadata["rsm_index"]

    @property
    def rsm_count(self):
        return self.metadata["rsm_count"]

    @property
    def complete(self):
        return self.metadata["complete"]

    def __len__(self):
        return self.items.__len__()

    def __missing__(self, key):
        return self.items.__missing__(key)

    def __getitem__(self, key):
        return self.items.__getitem__(key)

    def __iter__(self):
        return self.items.__iter__()

    def __reversed__(self):
        return self.items.__reversed__()

    def __contains__(self, item):
        return self.items.__contains__(item)


class Message(object):
    def __init__(self, msg_data):
        self._uid = msg_data[0]
        self._timestamp = msg_data[1]
        self._from_jid = msg_data[2]
        self._to_jid = msg_data[3]
        self._message_data = msg_data[4]
        self._subject_data = msg_data[5]
        self._type = msg_data[6]
        self._extra = data_format.deserialise(msg_data[7])
        self._html = dict(data_format.getSubDict("xhtml", self._extra))

    @property
    def id(self):
        return self._uid

    @property
    def timestamp(self):
        return self._timestamp

    @property
    def from_(self):
        return self._from_jid

    @property
    def text(self):
        try:
            return self._message_data[""]
        except KeyError:
            return next(iter(self._message_data.values()))

    @property
    def subject(self):
        try:
            return self._subject_data[""]
        except KeyError:
            return next(iter(self._subject_data.values()))

    @property
    def type(self):
        return self._type

    @property
    def thread(self):
        return self._extra.get("thread")

    @property
    def thread_parent(self):
        return self._extra.get("thread_parent")

    @property
    def received(self):
        return self._extra.get("received_timestamp", self._timestamp)

    @property
    def delay_sender(self):
        return self._extra.get("delay_sender")

    @property
    def info_type(self):
        return self._extra.get("info_type")

    @property
    def html(self):
        if not self._html:
            return None
        try:
            return safe(self._html[""])
        except KeyError:
            return safe(next(iter(self._html.values())))


class Messages(object):
    def __init__(self, msgs_data):
        self.messages = [Message(m) for m in msgs_data]

    def __len__(self):
        return self.messages.__len__()

    def __missing__(self, key):
        return self.messages.__missing__(key)

    def __getitem__(self, key):
        return self.messages.__getitem__(key)

    def __iter__(self):
        return self.messages.__iter__()

    def __reversed__(self):
        return self.messages.__reversed__()

    def __contains__(self, item):
        return self.messages.__contains__(item)


class Room(object):
    def __init__(self, jid, name=None, url=None):
        self.jid = jid
        self.name = name or jid
        if url is not None:
            self.url = url


class Identity(object):
    def __init__(self, jid_str, data=None):
        self.jid_str = jid_str
        self.data = data if data is not None else {}

    def __getitem__(self, key):
        return self.data[key]

    def __getattr__(self, key):
        try:
            return self.data[key]
        except KeyError:
            raise AttributeError(key)


class Identities(object):
    def __init__(self):
        self.identities = {}

    def __getitem__(self, jid_str):
        try:
            return self.identities[jid_str]
        except KeyError:
            return None

    def __setitem__(self, jid_str, data):
        self.identities[jid_str] = Identity(jid_str, data)

    def __contains__(self, jid_str):
        return jid_str in self.identities


class ObjectQuoter(object):
    """object wrapper which quote attribues (to be used in templates)"""

    def __init__(self, obj):
        self.obj = obj

    def __unicode__(self):
        return q(self.obj.__unicode__())

    def __str__(self):
        return self.__unicode__()

    def __getattr__(self, name):
        return q(self.obj.__getattr__(name))

    def __getitem__(self, key):
        return q(self.obj.__getitem__(key))


class OnClick(object):
    """Class to handle clickable elements targets"""

    def __init__(self, url=None):
        self.url = url

    def formatUrl(self, *args, **kwargs):
        """format URL using Python formatting

        values will be quoted before being used
        """
        return self.url.format(
            *[q(a) for a in args], **{k: ObjectQuoter(v) for k, v in kwargs.items()}
        )