#!/usr/bin/env python
#
# Public Domain 2014-present MongoDB, Inc.
# Public Domain 2008-2014 WiredTiger, Inc.
#
# This is free and unencumbered software released into the public domain.
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# of this software dedicate any and all copyright interest in the
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# software under copyright law.
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#
# test_assert05.py
#   Timestamps: assert durable timestamp settings
#

from suite_subprocess import suite_subprocess
import wiredtiger, wttest

def timestamp_str(t):
    return '%x' % t

class test_assert05(wttest.WiredTigerTestCase, suite_subprocess):
    base = 'assert05'
    base_uri = 'file:' + base
    session_config = 'isolation=snapshot'
    uri_always = base_uri + '.always.wt'
    uri_def = base_uri + '.def.wt'
    uri_never = base_uri + '.never.wt'
    uri_none = base_uri + '.none.wt'
    cfg = 'key_format=S,value_format=S,'
    cfg_always = 'verbose=(write_timestamp=true),write_timestamp_usage=always,assert=(write_timestamp=on)'
    cfg_def = ''
    cfg_never = 'write_timestamp_usage=never,assert=(write_timestamp=on)'
    cfg_none = 'assert=(write_timestamp=off)'

    count = 1
    #
    # Commit a k/v pair making sure that it detects an error if needed, when
    # used with and without a durable timestamp.
    #
    def insert_check(self, uri, use_ts):
        c = self.session.open_cursor(uri)
        key = 'key' + str(self.count)
        val = 'value' + str(self.count)

        # Commit with a timestamp
        self.session.begin_transaction()
        c[key] = val
        self.session.prepare_transaction(
            'prepare_timestamp=' + timestamp_str(self.count))
        self.session.timestamp_transaction(
            'commit_timestamp=' + timestamp_str(self.count))
        self.session.timestamp_transaction(
            'durable_timestamp=' + timestamp_str(self.count))
        # All settings other than never should commit successfully
        if (use_ts != 'never'):
            self.session.commit_transaction()
        else:
            '''
            Commented out for now: the system panics if we fail after preparing a transaction.

            msg = "/timestamp set on this transaction/"
            self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
                lambda:self.assertEquals(self.session.commit_transaction(),
                0), msg)
            '''
            self.session.rollback_transaction()
        c.close()
        self.count += 1

        # Commit without a timestamp
        key = 'key' + str(self.count)
        val = 'value' + str(self.count)
        c = self.session.open_cursor(uri)
        self.session.begin_transaction()
        c[key] = val
        if (use_ts == 'always'):
            self.session.prepare_transaction(
                'prepare_timestamp=' + timestamp_str(self.count))

        self.session.timestamp_transaction(
            'commit_timestamp=' + timestamp_str(self.count))
        # All settings other than always should commit successfully
        if (use_ts != 'always' and use_ts != 'never'):
            self.session.commit_transaction()
        else:
            '''
            Commented out for now: the system panics if we fail after preparing a transaction.

            msg = "/durable_timestamp is required for a prepared/"
            self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
                lambda:self.assertEquals(self.session.commit_transaction(),
                0), msg)
            '''
            self.session.rollback_transaction()
        self.count += 1
        c.close()

    def test_durable_timestamp(self):
        # Create a data item at a timestamp
        self.session.create(self.uri_always, self.cfg + self.cfg_always)
        self.session.create(self.uri_def, self.cfg + self.cfg_def)
        self.session.create(self.uri_never, self.cfg + self.cfg_never)
        self.session.create(self.uri_none, self.cfg + self.cfg_none)

        # Check inserting into each table
        self.insert_check(self.uri_always, 'always')
        self.insert_check(self.uri_def, 'none')
        self.insert_check(self.uri_never, 'never')
        self.insert_check(self.uri_none, 'none')

if __name__ == '__main__':
    wttest.run()