FAKE_ACCOUNTS = ('unknown', 'buildservice-autocommit', 'autobuild', '_service')


class User:
    def parse(self, xml, userid):
        self.userid = userid
        self.realname = xml.find("realname").text
        self.email = xml.find("email").text
        if self.email is None:
            self.email = ""

        return self

    def __str__(self):
        return f"User {self.userid}: {self.realname} {self.email}"

    def __repr__(self):
        return f"[{self.__str__()}]"

    def import_into_db(self, db):
        with db.cursor() as cur:
            cur.execute(
                """INSERT INTO users (userid, realname, email) 
                    VALUES (%s,%s,%s)""",
                (
                    self.userid,
                    self.realname,
                    self.email,
                ),
            )

    @staticmethod
    def lookup(db, userid):
        with db.cursor() as cur:
            cur.execute("SELECT * FROM users where userid=%s", (userid,))
            row = cur.fetchone()
        if not row:
            return None
        return row

    @staticmethod
    def missing_users(db):
        with db.cursor() as cur:
            cur.execute(
                """SELECT DISTINCT revisions.userid 
                    FROM revisions LEFT JOIN users ON revisions.userid = users.userid 
                    WHERE users.userid IS NULL AND revisions.userid NOT IN {}""".format(FAKE_ACCOUNTS)
            )
            missing_users = [row[0] for row in cur.fetchall()]
        return missing_users