class DBRevision:
    def __init__(self, row):
        # need to stay in sync with the schema creation in db.py
        (
            self.dbid,
            self.project,
            self.package,
            self.rev,
            self.unexpanded_srcmd5,
            self.commit_time,
            self.userid,
            self.comment,
            self.broken,
            self.expanded_srcmd5,
            self.request_number,
            self.request_id,
        ) = row

    def __str__(self):
        return f"Rev {self.project}/{self.rev} Md5 {self.unexpanded_srcmd5} {self.commit_time} {self.userid} {self.request_number}"

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

    def links_to(self, db, project, package):
        with db.cursor() as cur:
            cur.execute(
                "INSERT INTO links (revision_id, project, package) VALUES (%s,%s,%s)",
                (self.dbid, project, package),
            )

    @classmethod
    def import_obs_rev(cls, db, revision):
        with db.cursor() as cur:
            cur.execute(
                """INSERT INTO revisions (project, package, rev, unexpanded_srcmd5, commit_time, userid, comment, request_number)  
                        VALUES(%s, %s, %s, %s, %s, %s, %s, %s)""",
                (
                    revision.project,
                    revision.package,
                    revision.rev,
                    revision.unexpanded_srcmd5,
                    revision.time,
                    revision.userid,
                    revision.comment,
                    revision.request_number,
                ),
            )
        return cls.fetch_revision(db, revision.project, revision.package, revision.rev)

    @staticmethod
    def fetch_revision(db, project, package, rev):
        with db.cursor() as cur:
            cur.execute(
                "SELECT * FROM revisions where project=%s and package=%s and rev=%s",
                (project, package, str(rev)),
            )
            row = cur.fetchone()
        return DBRevision(row)

    @staticmethod
    def latest_revision(db, project, package):
        with db.cursor() as cur:
            cur.execute(
                "SELECT MAX(rev) FROM revisions where project=%s and package=%s",
                (project, package),
            )
            max = cur.fetchone()[0]
        if max:
            return DBRevision.fetch_revision(db, project, package, int(max))
        return None

    @staticmethod
    def all_revisions(db, project, package):
        with db.cursor() as cur:
            cur.execute(
                "SELECT * FROM revisions where project=%s and package=%s",
                (project, package),
            )
            ret = []
            for row in cur.fetchall():
                ret.append(DBRevision(row))
        return ret

    def linked_rev(self, db):
        with db.cursor() as cur:
            cur.execute(
                "SELECT project,package FROM links where revision_id=%s", (self.dbid,)
            )
            row = cur.fetchone()
            if not row:
                return None
            project, package = row
            cur.execute(
                "SELECT * FROM revisions where project=%s and package=%s and commit_time <= %s ORDER BY commit_time DESC LIMIT 1",
                (project, package, self.commit_time),
            )
            revisions = [DBRevision(row) for row in cur.fetchall()]
        if revisions:
            return revisions[0]
        return None

    def set_broken(self, db):
        with db.cursor() as cur:
            cur.execute("UPDATE revisions SET broken=TRUE where id=%s", (self.dbid,))


    def import_dir_list(self, db, xml):
        with db.cursor() as cur:
            cur.execute(
                "UPDATE revisions SET expanded_srcmd5=%s where id=%s",
                (xml.get("srcmd5"), self.dbid),
            )
            for entry in xml.findall("entry"):
                cur.execute(
                    """INSERT INTO files (name, md5, size, mtime, revision_id) 
                            VALUES (%s,%s,%s,%s,%s)""",
                    (
                        entry.get("name"),
                        entry.get("md5"),
                        entry.get("size"),
                        entry.get("mtime"),
                        self.dbid,
                    ),
                )

    @staticmethod
    def requests_to_fetch(db, project, package):
        with db.cursor() as cur:
            cur.execute(
                """SELECT request_number FROM revisions revs left join requests
                reqs on reqs.number=revs.request_number where reqs.id is null and
                revs.request_number is not null and project=%s and package=%s;""",
                (project, package),
            )
            ret = [row[0] for row in cur.fetchall()]
        return ret