# This file is part of Gajim.
#
# SPDX-License-Identifier: GPL-3.0-only

from __future__ import annotations

import dataclasses
import datetime as dt

import nbxmpp
import sqlalchemy.exc
from nbxmpp.namespaces import Namespace
from nbxmpp.structs import MessageProperties
from nbxmpp.structs import StanzaHandler
from nbxmpp.util import generate_id

from gajim.common import app
from gajim.common import types
from gajim.common.events import MessageAcknowledged
from gajim.common.events import MessageCorrected
from gajim.common.events import MessageError
from gajim.common.events import MessageReceived
from gajim.common.events import MessageSent
from gajim.common.events import RawMessageReceived
from gajim.common.events import ReactionUpdated
from gajim.common.modules.base import BaseModule
from gajim.common.modules.contacts import GroupchatParticipant
from gajim.common.modules.message_util import convert_message_type
from gajim.common.modules.message_util import get_chat_type_and_direction
from gajim.common.modules.message_util import get_eme_message
from gajim.common.modules.message_util import get_message_timestamp
from gajim.common.modules.message_util import get_occupant_info
from gajim.common.modules.misc import parse_oob
from gajim.common.storage.archive import models as mod
from gajim.common.storage.archive.const import ChatDirection
from gajim.common.storage.archive.const import MessageState
from gajim.common.storage.archive.const import MessageType
from gajim.common.structs import OutgoingMessage


class Message(BaseModule):
    def __init__(self, con: types.Client) -> None:
        BaseModule.__init__(self, con)

        self.handlers = [
            StanzaHandler(name='message',
                          callback=self._check_if_unknown_contact,
                          priority=41),
            StanzaHandler(name='message',
                          callback=self._message_received,
                          priority=50),
            StanzaHandler(name='message',
                          typ='error',
                          callback=self._message_error_received,
                          priority=50),
        ]

        # XEPs for which this message module should not be executed
        self._message_namespaces = {Namespace.ROSTERX, Namespace.IBB}

    def _check_if_unknown_contact(self,
                                  _con: types.NBXMPPClient,
                                  stanza: nbxmpp.Message,
                                  properties: MessageProperties
                                  ) -> None:
        if (properties.type.is_groupchat or
                properties.is_muc_pm or
                properties.is_self_message or
                properties.is_mam_message):
            return

        if self._con.get_own_jid().domain == str(properties.jid):
            # Server message
            return

        if not app.settings.get_account_setting(self._account,
                                                'ignore_unknown_contacts'):
            return

        assert properties.jid is not None
        bare_jid = properties.jid.new_as_bare()
        if self._con.get_module('Roster').get_item(bare_jid) is None:
            self._log.warning('Ignore message from unknown contact: %s', bare_jid)
            self._log.warning(stanza)
            raise nbxmpp.NodeProcessed

    def _message_received(self,
                          _con: types.NBXMPPClient,
                          stanza: nbxmpp.Message,
                          properties: MessageProperties
                          ) -> None:

        if properties.is_pubsub or properties.type.is_error:
            return

        if properties.type.is_normal and not properties.body:
            return

        # Check if a child of the message contains any
        # namespaces that we handle in other modules.
        # nbxmpp executes less common handlers last
        if self._message_namespaces & set(stanza.getProperties()):
            return

        self._log.info('Received from %s', stanza.getFrom())

        app.ged.raise_event(RawMessageReceived(
            conn=self._con,
            stanza=stanza,
            account=self._account))

        if properties.carbon is not None and properties.carbon.is_sent:
            # Ugly, we treat the from attr as the remote jid,
            # to make that work with sent carbons we have to do this.
            # TODO: Check where in Gajim and plugins we depend on that behavior
            stanza.setFrom(stanza.getTo())

        timestamp = get_message_timestamp(properties)
        remote_jid = properties.remote_jid
        jid = properties.jid
        assert remote_jid is not None
        assert jid is not None

        muc_data = None
        if properties.type.is_groupchat:
            muc_data = self._client.get_module('MUC').get_muc_data(remote_jid)
            if muc_data is None:
                self._log.warning(
                    'Groupchat message from unknown MUC: %s', remote_jid
                )
                return

        m_type, direction = get_chat_type_and_direction(
            muc_data, self._client.get_own_jid(), properties)

        user_delay_ts = None
        if properties.user_timestamp is not None:
            user_delay_ts = dt.datetime.fromtimestamp(
                properties.user_timestamp, tz=dt.UTC)

        message_id = properties.id
        if message_id is None:
            # TODO: Make Gajim not depend on a message_id being present
            message_id = generate_id()
            self._log.debug('Generating id for message')

        stanza_id = self._get_stanza_id(properties)

        # Fallback to message-id in case the MUC strips origin-id
        # https://dev.gajim.org/gajim/gajim/-/issues/11837
        origin_id = properties.origin_id or properties.id

        if (m_type in (MessageType.CHAT, MessageType.PM) and
                direction == ChatDirection.OUTGOING and
                origin_id is not None):
            if app.storage.archive.check_if_message_id_exists(
                    self._account, remote_jid, origin_id):
                self._log.info('Duplicated message received: %s', origin_id)
                return

        if (m_type == MessageType.GROUPCHAT and
                direction == ChatDirection.OUTGOING and
                origin_id is not None):

            # Use origin-id because some group chats change the message id
            # on the reflection.

            pk = app.storage.archive.update_pending_message(
                self._account, remote_jid, origin_id, stanza_id)

            if pk is not None:
                app.ged.raise_event(
                    MessageAcknowledged(account=self._account,
                                        jid=remote_jid,
                                        pk=pk,
                                        stanza_id=stanza_id))
                return

        occupant = None
        if (m_type in (MessageType.GROUPCHAT, MessageType.PM)
                and not jid.is_bare):

            contact = self._client.get_module('Contacts').get_contact(
                    jid, groupchat=True)
            assert isinstance(contact, GroupchatParticipant)

            occupant = get_occupant_info(
                self._account,
                remote_jid,
                self._get_own_bare_jid(),
                direction,
                timestamp,
                contact,
                properties
            )

        assert properties.bodies is not None
        message_text = properties.bodies.get(None)
        oob_data = parse_oob(properties)

        encryption_data = None
        if properties.encrypted is not None:
            encryption_data = mod.Encryption(
                **dataclasses.asdict(properties.encrypted))

        elif properties.eme is not None:
            message_text = get_eme_message(properties.eme)

        if not message_text:
            self._log.debug('Received message without text')
            return

        securitylabel_data = None
        if properties.security_label is not None:
            displaymarking = properties.security_label.displaymarking
            if displaymarking is not None:
                securitylabel_data = mod.SecurityLabel(
                    account_=self._account,
                    remote_jid_=remote_jid,
                    label_hash=properties.security_label.get_label_hash(),
                    displaymarking=displaymarking.name,
                    fgcolor=displaymarking.fgcolor,
                    bgcolor=displaymarking.bgcolor,
                    updated_at=timestamp,
                )

        reply = None
        if properties.reply_data is not None:
            reply = mod.Reply(
                id=properties.reply_data.id,
                to=properties.reply_data.to
            )

        correction_id = None
        if properties.correction is not None:
            correction_id = properties.correction.id

        message_data = mod.Message(
            account_=self._account,
            remote_jid_=remote_jid,
            type=m_type,
            direction=direction,
            timestamp=timestamp,
            state=MessageState.ACKNOWLEDGED,
            resource=jid.resource,
            text=message_text,
            id=message_id,
            stanza_id=stanza_id,
            user_delay_ts=user_delay_ts,
            correction_id=correction_id,
            encryption_=encryption_data,
            occupant_=occupant,
            oob=oob_data,
            security_label_=securitylabel_data,
            reply=reply,
            thread_id_=properties.thread,
        )

        try:
            pk = app.storage.archive.insert_object(
                message_data, ignore_on_conflict=False)
        except sqlalchemy.exc.IntegrityError:
            self._log.exception('Insertion Error')
            return

        if correction_id is not None:
            event = MessageCorrected(account=self._account,
                                     jid=remote_jid,
                                     pk=pk,
                                     correction_id=correction_id)
            app.ged.raise_event(event)
            return

        app.ged.raise_event(MessageReceived(account=self._account,
                                            jid=remote_jid,
                                            m_type=m_type,
                                            from_mam=properties.is_mam_message,
                                            pk=pk))

    def _message_error_received(self,
                                _con: types.NBXMPPClient,
                                stanza: nbxmpp.Message,
                                properties: MessageProperties
                                ) -> None:

        remote_jid = properties.remote_jid
        assert remote_jid is not None
        message_id = properties.id
        if message_id is None:
            self._log.warning('Received error without message id')
            self._log.warning(stanza)
            return

        timestamp = get_message_timestamp(properties)

        error_data = mod.MessageError(
            account_=self._account,
            remote_jid_=remote_jid,
            message_id=message_id,
            by=properties.error.by,
            type=properties.error.type,
            text=properties.error.get_text() or None,
            condition=properties.error.condition,
            condition_text=properties.error.condition_data,
            timestamp=timestamp,
        )

        pk = app.storage.archive.insert_row(
            error_data, ignore_on_conflict=True)
        if pk == -1:
            self._log.warning(
                'Received error with already known message id: %s', message_id)
            return

        app.ged.raise_event(
            MessageError(account=self._account,
                         jid=remote_jid,
                         message_id=message_id,
                         error=properties.error))

    def _get_stanza_id(self,
                       properties: MessageProperties
                       ) -> str | None:

        if properties.is_mam_message:
            return properties.mam.id

        if not properties.stanza_ids:
            return None

        if properties.type.is_groupchat:
            archive = properties.remote_jid
            disco_info = app.storage.cache.get_last_disco_info(archive)
            if not disco_info.supports(Namespace.SID):
                return None

        else:
            if not self._con.get_module('MAM').available:
                return None

            archive = self._con.get_own_jid().new_as_bare()

        for stanza_id in properties.stanza_ids:
            # Check if message is from expected archive
            if archive.bare_match(stanza_id.by):
                return stanza_id.id
        return None

    def build_message_stanza(self, message: OutgoingMessage) -> nbxmpp.Message:
        own_jid = self._con.get_own_jid()
        remote_jid = message.contact.jid

        stanza = nbxmpp.Message(
            to=remote_jid,
            body=message.get_text(),
            typ=convert_message_type(message.type)
        )

        # XEP-0359
        stanza.setID(message.message_id)
        stanza.setOriginID(message.message_id)

        # Mark Message as MUC PM
        if message.is_pm:
            stanza.setTag('x', namespace=Namespace.MUC_USER)

        # XEP-0444
        if message.reaction_data is not None:
            stanza.setReactions(*message.reaction_data)
            stanza.setTag('store', namespace=Namespace.MSG_HINTS)
            return stanza

        if message.correct_id:
            stanza.setTag('replace', attrs={'id': message.correct_id},
                          namespace=Namespace.CORRECT)

        # XEP-0461
        if message.reply_data is not None:
            stanza.setReply(str(message.reply_data.to),
                            message.reply_data.id,
                            message.reply_data.fallback_start,
                            message.reply_data.fallback_end)

        if message.sec_label:
            stanza.addChild(node=message.sec_label.to_node())

        # XEP-0066
        if message.oob_url is not None:
            oob = stanza.addChild('x', namespace=Namespace.X_OOB)
            oob.addChild('url').setData(message.oob_url)

        # XEP-0184
        if not own_jid.bare_match(message.contact.jid):
            if message.has_text() and not message.is_groupchat:
                stanza.setReceiptRequest()

        # XEP-0085
        if message.chatstate is not None:
            stanza.setTag(message.chatstate, namespace=Namespace.CHATSTATES)
            if not message.has_text():
                stanza.setTag('no-store',
                              namespace=Namespace.MSG_HINTS)

        # XEP-0333
        if message.has_text():
            stanza.setMarkable()
        if message.marker:
            marker, id_ = message.marker
            stanza.setMarker(marker, id_)

        # XEP-0490
        if message.mds_id is not None:
            message.setMdsAssist(message.mds_id, own_jid.new_as_bare())

        return stanza

    def store_message(self, message: OutgoingMessage) -> None:
        if (not message.has_text() and
                message.reaction_data is None):
            return

        if (message.type == MessageType.GROUPCHAT and
                message.reaction_data is not None):
            # Store reaction when the MUC reflects it
            return

        direction = ChatDirection.OUTGOING
        remote_jid = message.contact.jid

        assert message.message_id is not None

        occupant = None
        resource = self._client.get_bound_jid().resource
        state = MessageState.ACKNOWLEDGED

        if message.type in (MessageType.GROUPCHAT, MessageType.PM):
            # PM is a full jid, so convert to bare
            muc_jid = remote_jid.new_as_bare()
            muc_data = self._client.get_module('MUC').get_muc_data(muc_jid)
            if muc_data is None:
                self._log.warning('Trying to send message to unknown MUC: %s',
                                  muc_jid)
                return

            resource = muc_data.nick
            real_jid = self._client.get_own_jid().new_as_bare()
            occupant_id = muc_data.occupant_id or real_jid

            occupant = mod.Occupant(
                account_=self._account,
                remote_jid_=remote_jid,
                id=str(occupant_id),
                real_remote_jid_=real_jid,
                nickname=resource,
                updated_at=message.timestamp,
            )

            if message.type == MessageType.GROUPCHAT:
                state = MessageState.PENDING

        if message.reaction_data is not None:
            reactions_id, reactions = message.reaction_data
            reaction = mod.Reaction(
                account_=self._account,
                remote_jid_=remote_jid,
                occupant_=occupant,
                id=reactions_id,
                direction=direction,
                emojis=';'.join(reactions),
                timestamp=message.timestamp,
            )

            app.storage.archive.upsert_row2(reaction)

            app.ged.raise_event(
                ReactionUpdated(
                    account=self._account,
                    jid=remote_jid,
                    reaction_id=reactions_id,
                )
            )
            return

        encryption_data = None
        encryption = message.get_encryption()
        if encryption is not None:
            encryption_data = mod.Encryption(**dataclasses.asdict(encryption))

        securitylabel_data = None
        if message.sec_label is not None:
            displaymarking = message.sec_label.displaymarking
            if displaymarking is not None:
                securitylabel_data = mod.SecurityLabel(
                    account_=self._account,
                    remote_jid_=remote_jid,
                    label_hash=message.sec_label.get_label_hash(),
                    displaymarking=displaymarking.name,
                    fgcolor=displaymarking.fgcolor,
                    bgcolor=displaymarking.bgcolor,
                    updated_at=message.timestamp,
                )

        reply = None
        if message.reply_data is not None:
            reply = mod.Reply(
                id=message.reply_data.id,
                to=message.reply_data.to
            )

        oob_data: list[mod.OOB] = []
        if message.oob_url is not None:
            oob_data.append(mod.OOB(url=message.oob_url, description=None))

        message_data = mod.Message(
            account_=self._account,
            remote_jid_=remote_jid,
            type=message.type,
            direction=direction,
            timestamp=message.timestamp,
            state=state,
            resource=resource,
            text=message.get_text(with_fallback=False),
            id=message.message_id,
            stanza_id=None,
            user_delay_ts=None,
            correction_id=message.correct_id,
            encryption_=encryption_data,
            oob=oob_data,
            reply=reply,
            security_label_=securitylabel_data,
            occupant_=occupant,
        )

        pk = app.storage.archive.insert_object(message_data)
        if pk == -1:
            return

        if message.correct_id is not None:
            event = MessageCorrected(account=self._account,
                                     jid=remote_jid,
                                     pk=pk,
                                     correction_id=message.correct_id)
            app.ged.raise_event(event)
            return

        app.ged.raise_event(
            MessageSent(jid=remote_jid,
                        account=message.account,
                        pk=pk,
                        play_sound=message.play_sound))
