# Copyright (C) 2010-2024 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# 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 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/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/

import os
import time
import logging
import datetime
import traceback
import hashlib
import collections
import functools

from sqlalchemy import *
from sqlalchemy.ext.hybrid import hybrid_property
from sqlalchemy.orm import relationship, joinedload, class_mapper, validates
from sqlalchemy.exc import DatabaseError
from beaker.cache import cache_region, region_invalidate
from webob.exc import HTTPNotFound

from rhodecode.translation import _

from rhodecode.lib.vcs import get_backend
from rhodecode.lib.vcs.utils.helpers import get_scm
from rhodecode.lib.vcs.exceptions import VCSError
from zope.cachedescriptors.property import Lazy as LazyProperty
from rhodecode.lib.vcs.backends.base import EmptyCommit

from rhodecode.lib.utils2 import (
    str2bool,
    safe_str,
    get_commit_safe,
    remove_prefix,
    time_to_datetime,
    aslist,
    Optional,
    safe_int,
    get_clone_url,
)
from rhodecode.lib.ext_json import json
from rhodecode.lib.caching_query import FromCache

from rhodecode.model.meta import Base, Session

URL_SEP = "/"
log = logging.getLogger(__name__)

# ==============================================================================
# BASE CLASSES
# ==============================================================================

_hash_key = lambda k: hashlib.md5(safe_str(k)).hexdigest()


class BaseModel(object):
    """
    Base Model for all classes
    """

    @classmethod
    def _get_keys(cls):
        """return column names for this model"""
        return class_mapper(cls).c.keys()

    def get_dict(self):
        """
        return dict with keys and values corresponding
        to this model data"""

        d = {}
        for k in self._get_keys():
            d[k] = getattr(self, k)

        # also use __json__() if present to get additional fields
        _json_attr = getattr(self, "__json__", None)
        if _json_attr:
            # update with attributes from __json__
            if callable(_json_attr):
                _json_attr = _json_attr()
            for k, val in _json_attr.items():
                d[k] = val
        return d

    def get_appstruct(self):
        """return list with keys and values tupples corresponding
        to this model data"""

        l = []
        for k in self._get_keys():
            l.append(
                (
                    k,
                    getattr(self, k),
                )
            )
        return l

    def populate_obj(self, populate_dict):
        """populate model with data from given populate_dict"""

        for k in self._get_keys():
            if k in populate_dict:
                setattr(self, k, populate_dict[k])

    @classmethod
    def query(cls):
        return Session().query(cls)

    @classmethod
    def get(cls, id_):
        if id_:
            return cls.query().get(id_)

    @classmethod
    def get_or_404(cls, id_):
        try:
            id_ = int(id_)
        except (TypeError, ValueError):
            raise HTTPNotFound

        res = cls.query().get(id_)
        if not res:
            raise HTTPNotFound
        return res

    @classmethod
    def getAll(cls):
        # deprecated and left for backward compatibility
        return cls.get_all()

    @classmethod
    def get_all(cls):
        return cls.query().all()

    @classmethod
    def delete(cls, id_):
        obj = cls.query().get(id_)
        Session().delete(obj)

    def __repr__(self):
        if hasattr(self, "__unicode__"):
            # python repr needs to return str
            try:
                return safe_str(self.__unicode__())
            except UnicodeDecodeError:
                pass
        return "<DB:%s>" % (self.__class__.__name__)


class RhodeCodeSetting(Base, BaseModel):
    __tablename__ = "rhodecode_settings"
    __table_args__ = (
        UniqueConstraint("app_settings_name"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )

    SETTINGS_TYPES = {
        "str": safe_str,
        "int": safe_int,
        "unicode": safe_str,
        "bool": str2bool,
        "list": functools.partial(aslist, sep=","),
    }
    DEFAULT_UPDATE_URL = "https://rhodecode.com/api/v1/info/versions"

    app_settings_id = Column("app_settings_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    app_settings_name = Column("app_settings_name", String(255), nullable=True, unique=None, default=None)
    _app_settings_value = Column("app_settings_value", String(4096), nullable=True, unique=None, default=None)
    _app_settings_type = Column("app_settings_type", String(255), nullable=True, unique=None, default=None)

    def __init__(self, key="", val="", type="unicode"):
        self.app_settings_name = key
        self.app_settings_value = val
        self.app_settings_type = type

    @validates("_app_settings_value")
    def validate_settings_value(self, key, val):
        assert type(val) == str
        return val

    @hybrid_property
    def app_settings_value(self):
        v = self._app_settings_value
        _type = self.app_settings_type
        converter = self.SETTINGS_TYPES.get(_type) or self.SETTINGS_TYPES["unicode"]
        return converter(v)

    @app_settings_value.setter
    def app_settings_value(self, val):
        """
        Setter that will always make sure we use unicode in app_settings_value

        :param val:
        """
        self._app_settings_value = safe_str(val)

    @hybrid_property
    def app_settings_type(self):
        return self._app_settings_type

    @app_settings_type.setter
    def app_settings_type(self, val):
        if val not in self.SETTINGS_TYPES:
            raise Exception("type must be one of %s got %s" % (self.SETTINGS_TYPES.keys(), val))
        self._app_settings_type = val

    def __unicode__(self):
        return "<%s('%s:%s[%s]')>" % (
            self.__class__.__name__,
            self.app_settings_name,
            self.app_settings_value,
            self.app_settings_type,
        )


class RhodeCodeUi(Base, BaseModel):
    __tablename__ = "rhodecode_ui"
    __table_args__ = (
        UniqueConstraint("ui_key"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )

    HOOK_REPO_SIZE = "changegroup.repo_size"
    HOOK_PUSH = "changegroup.push_logger"
    HOOK_PRE_PUSH = "prechangegroup.pre_push"
    HOOK_PULL = "outgoing.pull_logger"
    HOOK_PRE_PULL = "preoutgoing.pre_pull"

    ui_id = Column("ui_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    ui_section = Column("ui_section", String(255), nullable=True, unique=None, default=None)
    ui_key = Column("ui_key", String(255), nullable=True, unique=None, default=None)
    ui_value = Column("ui_value", String(255), nullable=True, unique=None, default=None)
    ui_active = Column("ui_active", Boolean(), nullable=True, unique=None, default=True)

    def __repr__(self):
        return "<%s[%s]%s=>%s]>" % (self.__class__.__name__, self.ui_section, self.ui_key, self.ui_value)


class User(Base, BaseModel):
    __tablename__ = "users"
    __table_args__ = (
        UniqueConstraint("username"),
        UniqueConstraint("email"),
        Index("u_username_idx", "username"),
        Index("u_email_idx", "email"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    DEFAULT_USER = "default"
    DEFAULT_GRAVATAR_URL = "https://secure.gravatar.com/avatar/{md5email}?d=identicon&s={size}"

    user_id = Column("user_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    username = Column("username", String(255), nullable=True, unique=None, default=None)
    password = Column("password", String(255), nullable=True, unique=None, default=None)
    active = Column("active", Boolean(), nullable=True, unique=None, default=True)
    admin = Column("admin", Boolean(), nullable=True, unique=None, default=False)
    name = Column("firstname", String(255), nullable=True, unique=None, default=None)
    lastname = Column("lastname", String(255), nullable=True, unique=None, default=None)
    _email = Column("email", String(255), nullable=True, unique=None, default=None)
    last_login = Column("last_login", DateTime(timezone=False), nullable=True, unique=None, default=None)
    extern_type = Column("extern_type", String(255), nullable=True, unique=None, default=None)
    extern_name = Column("extern_name", String(255), nullable=True, unique=None, default=None)
    api_key = Column("api_key", String(255), nullable=True, unique=None, default=None)
    inherit_default_permissions = Column(
        "inherit_default_permissions", Boolean(), nullable=False, unique=None, default=True
    )
    created_on = Column("created_on", DateTime(timezone=False), nullable=False, default=datetime.datetime.now)
    # _user_data = Column("user_data", LargeBinary(), nullable=True)  # JSON data

    user_log = relationship("UserLog")
    user_perms = relationship("UserToPerm", primaryjoin="User.user_id==UserToPerm.user_id", cascade="all")

    repositories = relationship("Repository")
    user_followers = relationship(
        "UserFollowing", primaryjoin="UserFollowing.follows_user_id==User.user_id", cascade="all"
    )
    followings = relationship("UserFollowing", primaryjoin="UserFollowing.user_id==User.user_id", cascade="all")

    repo_to_perm = relationship("UserRepoToPerm", primaryjoin="UserRepoToPerm.user_id==User.user_id", cascade="all")
    repo_group_to_perm = relationship(
        "UserRepoGroupToPerm", primaryjoin="UserRepoGroupToPerm.user_id==User.user_id", cascade="all"
    )

    group_member = relationship("UserGroupMember", cascade="all")

    notifications = relationship("UserNotification", cascade="all")
    # notifications assigned to this user
    user_created_notifications = relationship("Notification", cascade="all")
    # comments created by this user
    user_comments = relationship("ChangesetComment", cascade="all")
    user_emails = relationship("UserEmailMap", cascade="all")
    user_auth_tokens = relationship("UserApiKeys", cascade="all")

    @hybrid_property
    def email(self):
        return self._email

    @email.setter
    def email(self, val):
        self._email = val.lower() if val else None

    @property
    def firstname(self):
        # alias for future
        return self.name

    @property
    def username_and_name(self):
        return "%s (%s %s)" % (self.username, self.firstname, self.lastname)

    @property
    def full_name(self):
        return "%s %s" % (self.firstname, self.lastname)

    @property
    def full_contact(self):
        return "%s %s <%s>" % (self.firstname, self.lastname, self.email)

    @property
    def short_contact(self):
        return "%s %s" % (self.firstname, self.lastname)

    @property
    def is_admin(self):
        return self.admin

    @classmethod
    def get_by_username(cls, username, case_insensitive=False, cache=False):
        if case_insensitive:
            q = cls.query().filter(cls.username.ilike(username))
        else:
            q = cls.query().filter(cls.username == username)

        if cache:
            q = q.options(FromCache("sql_cache_short", "get_user_%s" % _hash_key(username)))
        return q.scalar()

    @classmethod
    def get_by_auth_token(cls, auth_token, cache=False, fallback=True):
        q = cls.query().filter(cls.api_key == auth_token)

        if cache:
            q = q.options(FromCache("sql_cache_short", "get_auth_token_%s" % auth_token))
        res = q.scalar()

        if fallback and not res:
            # fallback to additional keys
            _res = (
                UserApiKeys.query()
                .filter(UserApiKeys.api_key == auth_token)
                .filter(or_(UserApiKeys.expires == -1, UserApiKeys.expires >= time.time()))
                .first()
            )
            if _res:
                res = _res.user
        return res

    @classmethod
    def get_by_email(cls, email, case_insensitive=False, cache=False):
        if case_insensitive:
            q = cls.query().filter(cls.email.ilike(email))
        else:
            q = cls.query().filter(cls.email == email)

        if cache:
            q = q.options(FromCache("sql_cache_short", "get_email_key_%s" % email))

        ret = q.scalar()
        if ret is None:
            q = UserEmailMap.query()
            # try fetching in alternate email map
            if case_insensitive:
                q = q.filter(UserEmailMap.email.ilike(email))
            else:
                q = q.filter(UserEmailMap.email == email)
            q = q.options(joinedload(UserEmailMap.user))
            if cache:
                q = q.options(FromCache("sql_cache_short", "get_email_map_key_%s" % email))
            ret = getattr(q.scalar(), "user", None)

        return ret

    @classmethod
    def get_first_admin(cls):
        user = User.query().filter(User.admin == True).first()
        if user is None:
            raise Exception("Missing administrative account!")
        return user

    @classmethod
    def get_default_user(cls, cache=False):
        user = User.get_by_username(User.DEFAULT_USER, cache=cache)
        if user is None:
            raise Exception("Missing default account!")
        return user


class UserApiKeys(Base, BaseModel):
    __tablename__ = "user_api_keys"
    __table_args__ = (
        Index("uak_api_key_idx", "api_key"),
        Index("uak_api_key_expires_idx", "api_key", "expires"),
        UniqueConstraint("api_key"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )

    user_api_key_id = Column("user_api_key_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=True, unique=None, default=None)
    api_key = Column("api_key", String(255), nullable=False, unique=True)
    description = Column("description", UnicodeText().with_variant(UnicodeText(1024), "mysql"))
    expires = Column("expires", Float(53), nullable=False)
    created_on = Column("created_on", DateTime(timezone=False), nullable=False, default=datetime.datetime.now)

    user = relationship("User", lazy="joined")


class UserEmailMap(Base, BaseModel):
    __tablename__ = "user_email_map"
    __table_args__ = (
        Index("uem_email_idx", "email"),
        UniqueConstraint("email"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )

    email_id = Column("email_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=True, unique=None, default=None)
    _email = Column("email", String(255), nullable=True, unique=False, default=None)
    user = relationship("User", lazy="joined")

    @validates("_email")
    def validate_email(self, key, email):
        # check if this email is not main one
        main_email = Session().query(User).filter(User.email == email).scalar()
        if main_email is not None:
            raise AttributeError("email %s is present is user table" % email)
        return email

    @hybrid_property
    def email(self):
        return self._email

    @email.setter
    def email(self, val):
        self._email = val.lower() if val else None


class UserIpMap(Base, BaseModel):
    __tablename__ = "user_ip_map"
    __table_args__ = (
        UniqueConstraint("user_id", "ip_addr"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )

    ip_id = Column("ip_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=True, unique=None, default=None)
    ip_addr = Column("ip_addr", String(255), nullable=True, unique=False, default=None)
    active = Column("active", Boolean(), nullable=True, unique=None, default=True)
    user = relationship("User", lazy="joined")

    def __unicode__(self):
        return "<%s('user_id:%s=>%s')>" % (self.__class__.__name__, self.user_id, self.ip_addr)


class UserLog(Base, BaseModel):
    __tablename__ = "user_logs"
    __table_args__ = (
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    user_log_id = Column("user_log_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=True, unique=None, default=None)
    username = Column("username", String(255), nullable=True, unique=None, default=None)
    repository_id = Column("repository_id", Integer(), ForeignKey("repositories.repo_id"), nullable=True)
    repository_name = Column("repository_name", String(255), nullable=True, unique=None, default=None)
    user_ip = Column("user_ip", String(255), nullable=True, unique=None, default=None)
    action = Column("action", String(1200000), nullable=True, unique=None, default=None)
    action_date = Column("action_date", DateTime(timezone=False), nullable=True, unique=None, default=None)

    def __unicode__(self):
        return "<%s('id:%s:%s')>" % (self.__class__.__name__, self.repository_name, self.action)

    user = relationship("User")
    repository = relationship("Repository", cascade="")


class UserGroup(Base, BaseModel):
    __tablename__ = "users_groups"
    __table_args__ = (
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )

    users_group_id = Column("users_group_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    users_group_name = Column("users_group_name", String(255), nullable=False, unique=True, default=None)
    user_group_description = Column("user_group_description", String(10000), nullable=True, unique=None, default=None)
    users_group_active = Column("users_group_active", Boolean(), nullable=True, unique=None, default=None)
    inherit_default_permissions = Column(
        "users_group_inherit_default_permissions", Boolean(), nullable=False, unique=None, default=True
    )
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=False, unique=False, default=None)
    created_on = Column("created_on", DateTime(timezone=False), nullable=False, default=datetime.datetime.now)

    members = relationship("UserGroupMember", cascade="all, delete, delete-orphan", lazy="joined")
    users_group_to_perm = relationship("UserGroupToPerm", cascade="all")
    users_group_repo_to_perm = relationship("UserGroupRepoToPerm", cascade="all")
    users_group_repo_group_to_perm = relationship("UserGroupRepoGroupToPerm", cascade="all")
    user_user_group_to_perm = relationship("UserUserGroupToPerm", cascade="all")
    user_group_user_group_to_perm = relationship(
        "UserGroupUserGroupToPerm",
        primaryjoin="UserGroupUserGroupToPerm.target_user_group_id==UserGroup.users_group_id",
        cascade="all",
    )

    user = relationship("User")

    def __unicode__(self):
        return "<%s('id:%s:%s')>" % (self.__class__.__name__, self.users_group_id, self.users_group_name)

    @classmethod
    def get_by_group_name(cls, group_name, cache=False, case_insensitive=False):
        if case_insensitive:
            q = cls.query().filter(cls.users_group_name.ilike(group_name))
        else:
            q = cls.query().filter(cls.users_group_name == group_name)
        if cache:
            q = q.options(FromCache("sql_cache_short", "get_user_%s" % _hash_key(group_name)))
        return q.scalar()

    @classmethod
    def get(cls, user_group_id, cache=False):
        user_group = cls.query()
        if cache:
            user_group = user_group.options(FromCache("sql_cache_short", "get_users_group_%s" % user_group_id))
        return user_group.get(user_group_id)


class UserGroupMember(Base, BaseModel):
    __tablename__ = "users_groups_members"
    __table_args__ = (
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )

    users_group_member_id = Column(
        "users_group_member_id", Integer(), nullable=False, unique=True, default=None, primary_key=True
    )
    users_group_id = Column(
        "users_group_id",
        Integer(),
        ForeignKey("users_groups.users_group_id"),
        nullable=False,
        unique=None,
        default=None,
    )
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=False, unique=None, default=None)

    user = relationship("User", lazy="joined")
    users_group = relationship("UserGroup")

    def __init__(self, gr_id="", u_id=""):
        self.users_group_id = gr_id
        self.user_id = u_id


class RepositoryField(Base, BaseModel):
    __tablename__ = "repositories_fields"
    __table_args__ = (
        UniqueConstraint("repository_id", "field_key"),  # no-multi field
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    PREFIX = "ex_"  # prefix used in form to not conflict with already existing fields

    repo_field_id = Column("repo_field_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    repository_id = Column(
        "repository_id", Integer(), ForeignKey("repositories.repo_id"), nullable=False, unique=None, default=None
    )
    field_key = Column("field_key", String(250))
    field_label = Column("field_label", String(1024), nullable=False)
    field_value = Column("field_value", String(10000), nullable=False)
    field_desc = Column("field_desc", String(1024), nullable=False)
    field_type = Column("field_type", String(256), nullable=False, unique=None)
    created_on = Column("created_on", DateTime(timezone=False), nullable=False, default=datetime.datetime.now)

    repository = relationship("Repository")

    @classmethod
    def get_by_key_name(cls, key, repo):
        row = cls.query().filter(cls.repository == repo).filter(cls.field_key == key).scalar()
        return row


class Repository(Base, BaseModel):
    __tablename__ = "repositories"
    __table_args__ = (
        UniqueConstraint("repo_name"),
        Index("r_repo_name_idx", "repo_name"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    DEFAULT_CLONE_URI = "{scheme}://{user}@{netloc}/{repo}"
    DEFAULT_CLONE_URI_ID = "{scheme}://{user}@{netloc}/_{repoid}"

    STATE_CREATED = "repo_state_created"
    STATE_PENDING = "repo_state_pending"
    STATE_ERROR = "repo_state_error"

    repo_id = Column("repo_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    repo_name = Column("repo_name", String(255), nullable=False, unique=True, default=None)
    clone_uri = Column("clone_uri", String(255), nullable=True, unique=False, default=None)
    repo_type = Column("repo_type", String(255), nullable=False, unique=False, default=None)
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=False, unique=False, default=None)
    private = Column("private", Boolean(), nullable=True, unique=None, default=None)
    enable_statistics = Column("statistics", Boolean(), nullable=True, unique=None, default=True)
    enable_downloads = Column("downloads", Boolean(), nullable=True, unique=None, default=True)
    description = Column("description", String(10000), nullable=True, unique=None, default=None)
    created_on = Column(
        "created_on", DateTime(timezone=False), nullable=True, unique=None, default=datetime.datetime.now
    )
    updated_on = Column(
        "updated_on", DateTime(timezone=False), nullable=True, unique=None, default=datetime.datetime.now
    )
    _landing_revision = Column("landing_revision", String(255), nullable=False, unique=False, default=None)
    enable_locking = Column("enable_locking", Boolean(), nullable=False, unique=None, default=False)
    _locked = Column("locked", String(255), nullable=True, unique=False, default=None)
    _changeset_cache = Column("changeset_cache", LargeBinary(), nullable=True)  # JSON data

    fork_id = Column(
        "fork_id", Integer(), ForeignKey("repositories.repo_id"), nullable=True, unique=False, default=None
    )
    group_id = Column("group_id", Integer(), ForeignKey("groups.group_id"), nullable=True, unique=False, default=None)

    user = relationship("User")
    fork = relationship("Repository", remote_side=repo_id)
    group = relationship("RepoGroup")
    repo_to_perm = relationship("UserRepoToPerm", cascade="all", order_by="UserRepoToPerm.repo_to_perm_id")
    users_group_to_perm = relationship("UserGroupRepoToPerm", cascade="all")
    stats = relationship("Statistics", cascade="all", uselist=False)

    followers = relationship(
        "UserFollowing", primaryjoin="UserFollowing.follows_repo_id==Repository.repo_id", cascade="all"
    )
    extra_fields = relationship("RepositoryField", cascade="all, delete, delete-orphan")

    logs = relationship("UserLog")
    comments = relationship("ChangesetComment", cascade="all, delete, delete-orphan")

    pull_requests_org = relationship(
        "PullRequest", primaryjoin="PullRequest.org_repo_id==Repository.repo_id", cascade="all, delete, delete-orphan"
    )

    pull_requests_other = relationship(
        "PullRequest", primaryjoin="PullRequest.other_repo_id==Repository.repo_id", cascade="all, delete, delete-orphan"
    )

    def __unicode__(self):
        return "<%s('%s:%s')>" % (self.__class__.__name__, self.repo_id, safe_str(self.repo_name))

    @classmethod
    def get_by_repo_name(cls, repo_name):
        q = Session().query(cls).filter(cls.repo_name == repo_name)
        q = (
            q.options(joinedload(Repository.fork))
            .options(joinedload(Repository.user))
            .options(joinedload(Repository.group))
        )
        return q.scalar()


class RepoGroup(Base, BaseModel):
    __tablename__ = "groups"
    __table_args__ = (
        UniqueConstraint("group_name", "group_parent_id"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )

    group_id = Column("group_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    group_name = Column("group_name", String(255), nullable=False, unique=True, default=None)
    group_parent_id = Column(
        "group_parent_id", Integer(), ForeignKey("groups.group_id"), nullable=True, unique=None, default=None
    )
    group_description = Column("group_description", String(10000), nullable=True, unique=None, default=None)
    enable_locking = Column("enable_locking", Boolean(), nullable=False, unique=None, default=False)
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=False, unique=False, default=None)
    created_on = Column("created_on", DateTime(timezone=False), nullable=False, default=datetime.datetime.now)

    repo_group_to_perm = relationship(
        "UserRepoGroupToPerm", cascade="all", order_by="UserRepoGroupToPerm.group_to_perm_id"
    )
    users_group_to_perm = relationship("UserGroupRepoGroupToPerm", cascade="all")
    parent_group = relationship("RepoGroup", remote_side=group_id)
    user = relationship("User")

    def __init__(self, group_name="", parent_group=None):
        self.group_name = group_name
        self.parent_group = parent_group

    def __unicode__(self):
        return "<%s('id:%s:%s')>" % (self.__class__.__name__, self.group_id, self.group_name)

    @classmethod
    def url_sep(cls):
        return URL_SEP

    @classmethod
    def get_by_group_name(cls, group_name, cache=False, case_insensitive=False):
        if case_insensitive:
            gr = cls.query().filter(cls.group_name.ilike(group_name))
        else:
            gr = cls.query().filter(cls.group_name == group_name)
        if cache:
            gr = gr.options(FromCache("sql_cache_short", "get_group_%s" % _hash_key(group_name)))
        return gr.scalar()


class Permission(Base, BaseModel):
    __tablename__ = "permissions"
    __table_args__ = (
        Index("p_perm_name_idx", "permission_name"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    PERMS = [
        ("hg.admin", _("RhodeCode Administrator")),
        ("repository.none", _("Repository no access")),
        ("repository.read", _("Repository read access")),
        ("repository.write", _("Repository write access")),
        ("repository.admin", _("Repository admin access")),
        ("group.none", _("Repository group no access")),
        ("group.read", _("Repository group read access")),
        ("group.write", _("Repository group write access")),
        ("group.admin", _("Repository group admin access")),
        ("usergroup.none", _("User group no access")),
        ("usergroup.read", _("User group read access")),
        ("usergroup.write", _("User group write access")),
        ("usergroup.admin", _("User group admin access")),
        ("hg.repogroup.create.false", _("Repository Group creation disabled")),
        ("hg.repogroup.create.true", _("Repository Group creation enabled")),
        ("hg.usergroup.create.false", _("User Group creation disabled")),
        ("hg.usergroup.create.true", _("User Group creation enabled")),
        ("hg.create.none", _("Repository creation disabled")),
        ("hg.create.repository", _("Repository creation enabled")),
        (
            "hg.create.write_on_repogroup.true",
            _("Repository creation enabled with write permission to a repository group"),
        ),
        (
            "hg.create.write_on_repogroup.false",
            _("Repository creation disabled with write permission to a repository group"),
        ),
        ("hg.fork.none", _("Repository forking disabled")),
        ("hg.fork.repository", _("Repository forking enabled")),
        ("hg.register.none", _("Registration disabled")),
        ("hg.register.manual_activate", _("User Registration with manual account activation")),
        ("hg.register.auto_activate", _("User Registration with automatic account activation")),
        ("hg.extern_activate.manual", _("Manual activation of external account")),
        ("hg.extern_activate.auto", _("Automatic activation of external account")),
    ]

    # definition of system default permissions for DEFAULT user
    DEFAULT_USER_PERMISSIONS = [
        "repository.read",
        "group.read",
        "usergroup.read",
        "hg.create.repository",
        "hg.create.write_on_repogroup.true",
        "hg.fork.repository",
        "hg.register.manual_activate",
        "hg.extern_activate.auto",
    ]

    # defines which permissions are more important higher the more important
    # Weight defines which permissions are more important.
    # The higher number the more important.
    PERM_WEIGHTS = {
        "repository.none": 0,
        "repository.read": 1,
        "repository.write": 3,
        "repository.admin": 4,
        "group.none": 0,
        "group.read": 1,
        "group.write": 3,
        "group.admin": 4,
        "usergroup.none": 0,
        "usergroup.read": 1,
        "usergroup.write": 3,
        "usergroup.admin": 4,
        "hg.repogroup.create.false": 0,
        "hg.repogroup.create.true": 1,
        "hg.usergroup.create.false": 0,
        "hg.usergroup.create.true": 1,
        "hg.fork.none": 0,
        "hg.fork.repository": 1,
        "hg.create.none": 0,
        "hg.create.repository": 1,
    }

    permission_id = Column("permission_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    permission_name = Column("permission_name", String(255), nullable=True, unique=None, default=None)
    permission_longname = Column("permission_longname", String(255), nullable=True, unique=None, default=None)

    def __unicode__(self):
        return "<%s('%s:%s')>" % (self.__class__.__name__, self.permission_id, self.permission_name)

    @classmethod
    def get_by_key(cls, key):
        return cls.query().filter(cls.permission_name == key).scalar()


class UserRepoToPerm(Base, BaseModel):
    __tablename__ = "repo_to_perm"
    __table_args__ = (
        UniqueConstraint("user_id", "repository_id", "permission_id"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    repo_to_perm_id = Column("repo_to_perm_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=False, unique=None, default=None)
    permission_id = Column(
        "permission_id", Integer(), ForeignKey("permissions.permission_id"), nullable=False, unique=None, default=None
    )
    repository_id = Column(
        "repository_id", Integer(), ForeignKey("repositories.repo_id"), nullable=False, unique=None, default=None
    )

    user = relationship("User")
    repository = relationship("Repository")
    permission = relationship("Permission")

    def __unicode__(self):
        return "<%s => %s >" % (self.user, self.repository)


class UserUserGroupToPerm(Base, BaseModel):
    __tablename__ = "user_user_group_to_perm"
    __table_args__ = (
        UniqueConstraint("user_id", "user_group_id", "permission_id"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    user_user_group_to_perm_id = Column(
        "user_user_group_to_perm_id", Integer(), nullable=False, unique=True, default=None, primary_key=True
    )
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=False, unique=None, default=None)
    permission_id = Column(
        "permission_id", Integer(), ForeignKey("permissions.permission_id"), nullable=False, unique=None, default=None
    )
    user_group_id = Column(
        "user_group_id", Integer(), ForeignKey("users_groups.users_group_id"), nullable=False, unique=None, default=None
    )

    user = relationship("User")
    user_group = relationship("UserGroup")
    permission = relationship("Permission")

    def __unicode__(self):
        return "<%s => %s >" % (self.user, self.user_group)


class UserToPerm(Base, BaseModel):
    __tablename__ = "user_to_perm"
    __table_args__ = (
        UniqueConstraint("user_id", "permission_id"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    user_to_perm_id = Column("user_to_perm_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=False, unique=None, default=None)
    permission_id = Column(
        "permission_id", Integer(), ForeignKey("permissions.permission_id"), nullable=False, unique=None, default=None
    )

    user = relationship("User")
    permission = relationship("Permission", lazy="joined")

    def __unicode__(self):
        return "<%s => %s >" % (self.user, self.permission)


class UserGroupRepoToPerm(Base, BaseModel):
    __tablename__ = "users_group_repo_to_perm"
    __table_args__ = (
        UniqueConstraint("repository_id", "users_group_id", "permission_id"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    users_group_to_perm_id = Column(
        "users_group_to_perm_id", Integer(), nullable=False, unique=True, default=None, primary_key=True
    )
    users_group_id = Column(
        "users_group_id",
        Integer(),
        ForeignKey("users_groups.users_group_id"),
        nullable=False,
        unique=None,
        default=None,
    )
    permission_id = Column(
        "permission_id", Integer(), ForeignKey("permissions.permission_id"), nullable=False, unique=None, default=None
    )
    repository_id = Column(
        "repository_id", Integer(), ForeignKey("repositories.repo_id"), nullable=False, unique=None, default=None
    )

    users_group = relationship("UserGroup")
    permission = relationship("Permission")
    repository = relationship("Repository")

    def __unicode__(self):
        return "<UserGroupRepoToPerm:%s => %s >" % (self.users_group, self.repository)


class UserGroupUserGroupToPerm(Base, BaseModel):
    __tablename__ = "user_group_user_group_to_perm"
    __table_args__ = (
        UniqueConstraint("target_user_group_id", "user_group_id", "permission_id"),
        CheckConstraint("target_user_group_id != user_group_id"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    user_group_user_group_to_perm_id = Column(
        "user_group_user_group_to_perm_id", Integer(), nullable=False, unique=True, default=None, primary_key=True
    )
    target_user_group_id = Column(
        "target_user_group_id",
        Integer(),
        ForeignKey("users_groups.users_group_id"),
        nullable=False,
        unique=None,
        default=None,
    )
    permission_id = Column(
        "permission_id", Integer(), ForeignKey("permissions.permission_id"), nullable=False, unique=None, default=None
    )
    user_group_id = Column(
        "user_group_id", Integer(), ForeignKey("users_groups.users_group_id"), nullable=False, unique=None, default=None
    )

    target_user_group = relationship(
        "UserGroup", primaryjoin="UserGroupUserGroupToPerm.target_user_group_id==UserGroup.users_group_id"
    )
    user_group = relationship(
        "UserGroup", primaryjoin="UserGroupUserGroupToPerm.user_group_id==UserGroup.users_group_id"
    )
    permission = relationship("Permission")

    def __unicode__(self):
        return "<UserGroupUserGroup:%s => %s >" % (self.target_user_group, self.user_group)


class UserGroupToPerm(Base, BaseModel):
    __tablename__ = "users_group_to_perm"
    __table_args__ = (
        UniqueConstraint(
            "users_group_id",
            "permission_id",
        ),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    users_group_to_perm_id = Column(
        "users_group_to_perm_id", Integer(), nullable=False, unique=True, default=None, primary_key=True
    )
    users_group_id = Column(
        "users_group_id",
        Integer(),
        ForeignKey("users_groups.users_group_id"),
        nullable=False,
        unique=None,
        default=None,
    )
    permission_id = Column(
        "permission_id", Integer(), ForeignKey("permissions.permission_id"), nullable=False, unique=None, default=None
    )

    users_group = relationship("UserGroup")
    permission = relationship("Permission")


class UserRepoGroupToPerm(Base, BaseModel):
    __tablename__ = "user_repo_group_to_perm"
    __table_args__ = (
        UniqueConstraint("user_id", "group_id", "permission_id"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )

    group_to_perm_id = Column(
        "group_to_perm_id", Integer(), nullable=False, unique=True, default=None, primary_key=True
    )
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=False, unique=None, default=None)
    group_id = Column("group_id", Integer(), ForeignKey("groups.group_id"), nullable=False, unique=None, default=None)
    permission_id = Column(
        "permission_id", Integer(), ForeignKey("permissions.permission_id"), nullable=False, unique=None, default=None
    )

    user = relationship("User")
    group = relationship("RepoGroup")
    permission = relationship("Permission")


class UserGroupRepoGroupToPerm(Base, BaseModel):
    __tablename__ = "users_group_repo_group_to_perm"
    __table_args__ = (
        UniqueConstraint("users_group_id", "group_id"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )

    users_group_repo_group_to_perm_id = Column(
        "users_group_repo_group_to_perm_id", Integer(), nullable=False, unique=True, default=None, primary_key=True
    )
    users_group_id = Column(
        "users_group_id",
        Integer(),
        ForeignKey("users_groups.users_group_id"),
        nullable=False,
        unique=None,
        default=None,
    )
    group_id = Column("group_id", Integer(), ForeignKey("groups.group_id"), nullable=False, unique=None, default=None)
    permission_id = Column(
        "permission_id", Integer(), ForeignKey("permissions.permission_id"), nullable=False, unique=None, default=None
    )

    users_group = relationship("UserGroup")
    permission = relationship("Permission")
    group = relationship("RepoGroup")


class Statistics(Base, BaseModel):
    __tablename__ = "statistics"
    __table_args__ = (
        UniqueConstraint("repository_id"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    stat_id = Column("stat_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    repository_id = Column(
        "repository_id", Integer(), ForeignKey("repositories.repo_id"), nullable=False, unique=True, default=None
    )
    stat_on_revision = Column("stat_on_revision", Integer(), nullable=False)
    commit_activity = Column("commit_activity", LargeBinary(1000000), nullable=False)  # JSON data
    commit_activity_combined = Column("commit_activity_combined", LargeBinary(), nullable=False)  # JSON data
    languages = Column("languages", LargeBinary(1000000), nullable=False)  # JSON data

    repository = relationship("Repository", single_parent=True)


class UserFollowing(Base, BaseModel):
    __tablename__ = "user_followings"
    __table_args__ = (
        UniqueConstraint("user_id", "follows_repository_id"),
        UniqueConstraint("user_id", "follows_user_id"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )

    user_following_id = Column(
        "user_following_id", Integer(), nullable=False, unique=True, default=None, primary_key=True
    )
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=False, unique=None, default=None)
    follows_repo_id = Column(
        "follows_repository_id", Integer(), ForeignKey("repositories.repo_id"), nullable=True, unique=None, default=None
    )
    follows_user_id = Column(
        "follows_user_id", Integer(), ForeignKey("users.user_id"), nullable=True, unique=None, default=None
    )
    follows_from = Column(
        "follows_from", DateTime(timezone=False), nullable=True, unique=None, default=datetime.datetime.now
    )

    user = relationship("User", primaryjoin="User.user_id==UserFollowing.user_id")

    follows_user = relationship("User", primaryjoin="User.user_id==UserFollowing.follows_user_id")
    follows_repository = relationship("Repository", order_by="Repository.repo_name")


class CacheInvalidation(Base, BaseModel):
    __tablename__ = "cache_invalidation"
    __table_args__ = (
        UniqueConstraint("cache_key"),
        Index("key_idx", "cache_key"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    cache_id = Column("cache_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)
    cache_key = Column("cache_key", String(255), nullable=True, unique=None, default=None)
    cache_args = Column("cache_args", String(255), nullable=True, unique=None, default=None)
    cache_active = Column("cache_active", Boolean(), nullable=True, unique=None, default=False)

    def __init__(self, cache_key, cache_args=""):
        self.cache_key = cache_key
        self.cache_args = cache_args
        self.cache_active = False


class ChangesetComment(Base, BaseModel):
    __tablename__ = "changeset_comments"
    __table_args__ = (
        Index("cc_revision_idx", "revision"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    comment_id = Column("comment_id", Integer(), nullable=False, primary_key=True)
    repo_id = Column("repo_id", Integer(), ForeignKey("repositories.repo_id"), nullable=False)
    revision = Column("revision", String(40), nullable=True)
    pull_request_id = Column("pull_request_id", Integer(), ForeignKey("pull_requests.pull_request_id"), nullable=True)
    line_no = Column("line_no", Unicode(10), nullable=True)
    hl_lines = Column("hl_lines", Unicode(512), nullable=True)
    f_path = Column("f_path", Unicode(1000), nullable=True)
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=False)
    text = Column("text", UnicodeText().with_variant(UnicodeText(25000), "mysql"), nullable=False)
    created_on = Column("created_on", DateTime(timezone=False), nullable=False, default=datetime.datetime.now)
    modified_at = Column("modified_at", DateTime(timezone=False), nullable=False, default=datetime.datetime.now)

    author = relationship("User", lazy="joined")
    repo = relationship("Repository")
    status_change = relationship("ChangesetStatus", cascade="all, delete, delete-orphan")
    pull_request = relationship("PullRequest", lazy="joined")


class ChangesetStatus(Base, BaseModel):
    __tablename__ = "changeset_statuses"
    __table_args__ = (
        Index("cs_revision_idx", "revision"),
        Index("cs_version_idx", "version"),
        UniqueConstraint("repo_id", "revision", "version"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    STATUS_NOT_REVIEWED = DEFAULT = "not_reviewed"
    STATUS_APPROVED = "approved"
    STATUS_REJECTED = "rejected"
    STATUS_UNDER_REVIEW = "under_review"

    STATUSES = [
        (STATUS_NOT_REVIEWED, _("Not Reviewed")),  # (no icon) and default
        (STATUS_APPROVED, _("Approved")),
        (STATUS_REJECTED, _("Rejected")),
        (STATUS_UNDER_REVIEW, _("Under Review")),
    ]

    changeset_status_id = Column("changeset_status_id", Integer(), nullable=False, primary_key=True)
    repo_id = Column("repo_id", Integer(), ForeignKey("repositories.repo_id"), nullable=False)
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=False, unique=None)
    revision = Column("revision", String(40), nullable=False)
    status = Column("status", String(128), nullable=False, default=DEFAULT)
    changeset_comment_id = Column("changeset_comment_id", Integer(), ForeignKey("changeset_comments.comment_id"))
    modified_at = Column("modified_at", DateTime(), nullable=False, default=datetime.datetime.now)
    version = Column("version", Integer(), nullable=False, default=0)
    pull_request_id = Column("pull_request_id", Integer(), ForeignKey("pull_requests.pull_request_id"), nullable=True)

    author = relationship("User", lazy="joined")
    repo = relationship("Repository")
    comment = relationship("ChangesetComment", lazy="joined")
    pull_request = relationship("PullRequest", lazy="joined")


class PullRequest(Base, BaseModel):
    __tablename__ = "pull_requests"
    __table_args__ = (
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )

    STATUS_NEW = "new"
    STATUS_OPEN = "open"
    STATUS_CLOSED = "closed"

    pull_request_id = Column("pull_request_id", Integer(), nullable=False, primary_key=True)
    title = Column("title", Unicode(256), nullable=True)
    description = Column("description", UnicodeText().with_variant(UnicodeText(10240), "mysql"), nullable=True)
    status = Column("status", Unicode(256), nullable=False, default=STATUS_NEW)
    created_on = Column("created_on", DateTime(timezone=False), nullable=False, default=datetime.datetime.now)
    updated_on = Column("updated_on", DateTime(timezone=False), nullable=False, default=datetime.datetime.now)
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=False, unique=None)
    _revisions = Column("revisions", UnicodeText().with_variant(UnicodeText(20500), "mysql"))
    org_repo_id = Column("org_repo_id", Integer(), ForeignKey("repositories.repo_id"), nullable=False)
    org_ref = Column("org_ref", Unicode(256), nullable=False)
    other_repo_id = Column("other_repo_id", Integer(), ForeignKey("repositories.repo_id"), nullable=False)
    other_ref = Column("other_ref", Unicode(256), nullable=False)

    author = relationship("User", lazy="joined")
    reviewers = relationship("PullRequestReviewers", cascade="all, delete, delete-orphan")
    org_repo = relationship("Repository", primaryjoin="PullRequest.org_repo_id==Repository.repo_id")
    other_repo = relationship("Repository", primaryjoin="PullRequest.other_repo_id==Repository.repo_id")
    statuses = relationship("ChangesetStatus")
    comments = relationship("ChangesetComment", cascade="all, delete, delete-orphan")


class PullRequestReviewers(Base, BaseModel):
    __tablename__ = "pull_request_reviewers"
    __table_args__ = (
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )

    def __init__(self, user=None, pull_request=None):
        self.user = user
        self.pull_request = pull_request

    pull_requests_reviewers_id = Column("pull_requests_reviewers_id", Integer(), nullable=False, primary_key=True)
    pull_request_id = Column("pull_request_id", Integer(), ForeignKey("pull_requests.pull_request_id"), nullable=False)
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=True)

    user = relationship("User")
    pull_request = relationship("PullRequest")


class Notification(Base, BaseModel):
    __tablename__ = "notifications"
    __table_args__ = (
        Index("notification_type_idx", "type"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )

    TYPE_CHANGESET_COMMENT = "cs_comment"
    TYPE_MESSAGE = "message"
    TYPE_MENTION = "mention"
    TYPE_REGISTRATION = "registration"
    TYPE_PULL_REQUEST = "pull_request"
    TYPE_PULL_REQUEST_COMMENT = "pull_request_comment"

    notification_id = Column("notification_id", Integer(), nullable=False, primary_key=True)
    subject = Column("subject", Unicode(512), nullable=True)
    body = Column("body", UnicodeText().with_variant(UnicodeText(50000), "mysql"), nullable=True)
    created_by = Column("created_by", Integer(), ForeignKey("users.user_id"), nullable=True)
    created_on = Column("created_on", DateTime(timezone=False), nullable=False, default=datetime.datetime.now)
    type_ = Column("type", Unicode(256))

    created_by_user = relationship("User")
    notifications_to_users = relationship("UserNotification", lazy="joined", cascade="all, delete, delete-orphan")


class UserNotification(Base, BaseModel):
    __tablename__ = "user_to_notification"
    __table_args__ = (
        UniqueConstraint("user_id", "notification_id"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    user_id = Column("user_id", Integer(), ForeignKey("users.user_id"), primary_key=True)
    notification_id = Column(
        "notification_id", Integer(), ForeignKey("notifications.notification_id"), primary_key=True
    )
    read = Column("read", Boolean, default=False)
    sent_on = Column("sent_on", DateTime(timezone=False), nullable=True, unique=None)

    user = relationship("User", lazy="joined")
    notification = relationship(
        "Notification",
        lazy="joined",
        order_by=lambda: Notification.created_on.desc(),
    )


class Gist(Base, BaseModel):
    __tablename__ = "gists"
    __table_args__ = (
        Index("g_gist_access_id_idx", "gist_access_id"),
        Index("g_created_on_idx", "created_on"),
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    GIST_PUBLIC = "public"
    GIST_PRIVATE = "private"
    DEFAULT_FILENAME = "gistfile1.txt"

    gist_id = Column("gist_id", Integer(), primary_key=True)
    gist_access_id = Column("gist_access_id", Unicode(250))
    gist_description = Column("gist_description", UnicodeText().with_variant(UnicodeText(1024), "mysql"))
    gist_owner = Column("user_id", Integer(), ForeignKey("users.user_id"), nullable=True)
    gist_expires = Column("gist_expires", Float(53), nullable=False)
    gist_type = Column("gist_type", Unicode(128), nullable=False)
    created_on = Column("created_on", DateTime(timezone=False), nullable=False, default=datetime.datetime.now)
    modified_at = Column("modified_at", DateTime(timezone=False), nullable=False, default=datetime.datetime.now)

    owner = relationship("User")


class DbMigrateVersion(Base, BaseModel):
    __tablename__ = "db_migrate_version"
    __table_args__ = (
        {"extend_existing": True, "mysql_engine": "InnoDB", "mysql_charset": "utf8", "sqlite_autoincrement": True},
    )
    repository_id = Column("repository_id", String(250), primary_key=True)
    repository_path = Column("repository_path", Text)
    version = Column("version", Integer)
