#!/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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# Anyone is free to copy, modify, publish, use, compile, sell, or
# distribute this software, either in source code form or as a compiled
# binary, for any purpose, commercial or non-commercial, and by any
# means.
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# of this software dedicate any and all copyright interest in the
# software to the public domain. We make this dedication for the benefit
# of the public at large and to the detriment of our heirs and
# successors. We intend this dedication to be an overt act of
# relinquishment in perpetuity of all present and future rights to this
# software under copyright law.
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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#
# test_txn18.py
#   Transactions: test recovery settings
#

import fnmatch, os, shutil, time
from suite_subprocess import suite_subprocess
import wiredtiger, wttest

class test_txn18(wttest.WiredTigerTestCase, suite_subprocess):
    t1 = 'table:test_txn18'
    create_params = 'key_format=i,value_format=i'
    conn_config = 'log=(archive=false,enabled,file_max=100K),' + \
                'transaction_sync=(method=dsync,enabled)'
    conn_recerror = conn_config + ',log=(recover=error)'
    conn_recon = conn_config + ',log=(recover=on)'

    def simulate_crash(self, olddir, newdir):
        ''' Simulate a crash from olddir and restart in newdir. '''
        # with the connection still open, copy files to new directory
        shutil.rmtree(newdir, ignore_errors=True)
        os.mkdir(newdir)
        for fname in os.listdir(olddir):
            fullname = os.path.join(olddir, fname)
            # Skip lock file on Windows since it is locked
            if os.path.isfile(fullname) and \
                "WiredTiger.lock" not in fullname and \
                "Tmplog" not in fullname and \
                "Preplog" not in fullname:
                shutil.copy(fullname, newdir)

    def test_recovery(self):
        ''' Run the recovery settings '''

        # Here's the strategy:
        #    - Create a table (t1).
        #    - Insert data into t1.
        #    - Simulate a crash.
        #    - Make recovery run with recovery=error
        # and make sure it detects an error since recovery is needed
        #    - Make recovery run with recovery=on.
        #    - Do a clean shutdown and restart with recovery=error
        # and make sure is successful.
        #
        # If we aren't tracking file IDs properly, it's possible that
        # we'd end up apply the log records for t2 to table t1.
        self.session.create(self.t1, self.create_params)
        #
        # Since we're logging, we need to flush out the meta-data file
        # from the create.
        self.session.checkpoint()
        c = self.session.open_cursor(self.t1, None, None)
        for i in range(10000):
            c[i] = i + 1
        c.close()
        olddir = "."
        newdir = "RESTART"
        errdir = "ERROR"
        self.simulate_crash(olddir, errdir)
        self.simulate_crash(olddir, newdir)
        # close the original connection
        self.close_conn()
        # Trying to open the error directory with recover=error should return an error.
        msg = '/recovery must be run/'
        self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
            lambda:self.wiredtiger_open(errdir, self.conn_recerror), msg)

        # If recover=error is run on the directory and returns an error,
        # make sure when we subsequently open with recover=on it properly
        # recovers all the data.
        self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
            lambda:self.wiredtiger_open(newdir, self.conn_recerror), msg)

        # Opening with recover=on should succeed.
        self.conn = self.wiredtiger_open(newdir, self.conn_recon)
        # Make sure the data we added originally is there
        self.session = self.setUpSessionOpen(self.conn)
        c = self.session.open_cursor(self.t1, None, None)
        i = 0
        for key, value in c:
            self.assertEqual(i, key)
            self.assertEqual(i+1, value)
            i += 1
        self.assertEqual(i, 10000)
        c.close()
        self.close_conn()
        # Reopening with recover=error after a clean shutdown should succeed.
        self.conn = self.wiredtiger_open(newdir, self.conn_recerror)

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