# This file is part of Buildbot.  Buildbot is free software: you can
# redistribute it and/or modify it under the terms of the GNU General Public
# License as published by the Free Software Foundation, version 2.
#
# 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 General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Copyright Buildbot Team Members

from buildbot.db import base
from buildbot.util import epoch2datetime
from twisted.internet import reactor


class BuildsConnectorComponent(base.DBConnectorComponent):
    # Documentation is in developer/database.rst

    def getBuild(self, bid):
        def thd(conn):
            tbl = self.db.model.builds
            res = conn.execute(tbl.select(whereclause=(tbl.c.id == bid)))
            row = res.fetchone()

            rv = None
            if row:
                rv = self._bdictFromRow(row)
            res.close()
            return rv
        return self.db.pool.do(thd)

    def getBuildsForRequest(self, brid):
        def thd(conn):
            tbl = self.db.model.builds
            q = tbl.select(whereclause=(tbl.c.brid == brid))
            res = conn.execute(q)
            return [self._bdictFromRow(row) for row in res.fetchall()]
        return self.db.pool.do(thd)

    def addBuild(self, brid, number, _reactor=reactor):
        def thd(conn):
            start_time = _reactor.seconds()
            r = conn.execute(self.db.model.builds.insert(),
                             dict(number=number, brid=brid, start_time=start_time,
                                  finish_time=None))
            return r.inserted_primary_key[0]
        return self.db.pool.do(thd)

    def finishBuilds(self, bids, _reactor=reactor):
        def thd(conn):
            transaction = conn.begin()
            tbl = self.db.model.builds
            now = _reactor.seconds()

            # split the bids into batches, so as not to overflow the parameter
            # lists of the database interface
            remaining = bids
            while remaining:
                batch, remaining = remaining[:100], remaining[100:]
                q = tbl.update(whereclause=(tbl.c.id.in_(batch)))
                conn.execute(q, finish_time=now)

            transaction.commit()
        return self.db.pool.do(thd)

    def _bdictFromRow(self, row):
        def mkdt(epoch):
            if epoch:
                return epoch2datetime(epoch)

        return dict(
            bid=row.id,
            brid=row.brid,
            number=row.number,
            start_time=mkdt(row.start_time),
            finish_time=mkdt(row.finish_time))
