#!/bin/sh
#
# Copyright 2019 PingCAP, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

set -eu
DB="$TEST_NAME"
TABLE="usertable"
DB_COUNT=3
LOG=/$TEST_DIR/backup.log
CUR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)

for i in $(seq $DB_COUNT); do
    run_sql "CREATE DATABASE $DB${i};"
    go-ycsb load mysql -P $CUR/workload -p mysql.host=$TIDB_IP -p mysql.port=$TIDB_PORT -p mysql.user=root -p mysql.db=$DB${i}
done

for i in $(seq $DB_COUNT); do
    row_count_ori[${i}]=$(run_sql "SELECT COUNT(*) FROM $DB${i}.$TABLE;" | awk '/COUNT/{print $2}')
done

for i in $(seq $DB_COUNT); do
    run_sql "USE $DB${i}; ALTER TABLE $TABLE ADD INDEX i1(FIELD0);"
    run_sql "USE $DB${i}; ALTER TABLE $TABLE DROP INDEX i1;"
    run_sql "USE $DB${i}; ALTER TABLE $TABLE ADD INDEX i1(FIELD1);"
done

# backup full
echo "backup start..."
# Do not log to terminal
unset BR_LOG_TO_TERM
# do not backup stats to test whether we can restore without stats.
run_br --pd $PD_ADDR backup full -s "local://$TEST_DIR/$DB" --ignore-stats=true --log-file $LOG --checksum=true || cat $LOG
BR_LOG_TO_TERM=1

checksum_count=$(cat $LOG | grep "checksum success" | wc -l | xargs)

if [ "${checksum_count}" -lt "$DB_COUNT" ];then
    echo "TEST: [$TEST_NAME] fail on fast checksum: required $DB_COUNT databases checked, but only ${checksum_count} dbs checked"
    echo $(cat $LOG | grep checksum)
    exit 1
fi

for i in $(seq $DB_COUNT); do
    run_sql "DROP DATABASE $DB${i};"
done

# restore full
echo "restore start..."
run_br restore full -s "local://$TEST_DIR/$DB" --pd $PD_ADDR

for i in $(seq $DB_COUNT); do
    row_count_new[${i}]=$(run_sql "SELECT COUNT(*) FROM $DB${i}.$TABLE;" | awk '/COUNT/{print $2}')
done

fail=false
for i in $(seq $DB_COUNT); do
    if [ "${row_count_ori[i]}" != "${row_count_new[i]}" ];then
        fail=true
        echo "TEST: [$TEST_NAME] fail on database $DB${i}"
    fi
    echo "database $DB${i} [original] row count: ${row_count_ori[i]}, [after br] row count: ${row_count_new[i]}"
done

if $fail; then
    echo "TEST: [$TEST_NAME] failed!"
    exit 1
fi

for i in $(seq $DB_COUNT); do
    run_sql "DROP DATABASE $DB${i};"
done