#!/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="$TEST_NAME"
TABLE="usertable"
DB_COUNT=3
CUR=$(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

# backup full and kill tikv to test reset connection
echo "backup with limit start..."
export GO_FAILPOINTS="github.com/pingcap/tidb/br/pkg/backup/reset-retryable-error=1*return(\"Unavailable\")->1*return(\"Internal\")"
run_br --pd $PD_ADDR backup full -s "local://$TEST_DIR/$DB-limit" --concurrency 4
export GO_FAILPOINTS=""

# backup full and let TiKV returns an unknown error, to test whether we can gracefully stop.
echo "backup with unretryable error start..."
export GO_FAILPOINTS="github.com/pingcap/tidb/br/pkg/backup/reset-not-retryable-error=1*return(true)"
run_br --pd $PD_ADDR backup full -s "local://$TEST_DIR/$DB-no-retryable" --concurrency 4 &
pid=$!
export GO_FAILPOINTS=""
sleep 15
if ps -q $pid ; then
    echo "After failed 15 seconds, BR doesn't gracefully shutdown..."
    exit 1
fi

# backup full
echo "backup with lz4 start..."
test_log="${TEST_DIR}/${DB}_test.log"
error_str="not read from or written to within the timeout period"
unset BR_LOG_TO_TERM

export GO_FAILPOINTS="github.com/pingcap/tidb/br/pkg/backup/backup-storage-error=1*return(\"connection refused\")->1*return(\"InternalError\");github.com/pingcap/tidb/br/pkg/backup/backup-timeout-error=1*return(\"<Code>RequestTimeout</Code>\")->1*return(\"not read from or written to within the timeout period\")->1*return(\"<Code>InvalidPart</Code>\")->1*return(\"end of file before message length reached\")->1*return(\"timeout after\")"
run_br --pd $PD_ADDR backup full -s "local://$TEST_DIR/$DB-lz4" --concurrency 4 --compression lz4 --log-file $test_log
export GO_FAILPOINTS=""
size_lz4=$(du -d 0 $TEST_DIR/$DB-lz4 | awk '{print $1}')

if ! grep -i "$error_str" $test_log; then
    echo "${error_str} not found in log"
    echo "TEST: [$TEST_NAME] test restore failed!"
    exit 1
fi

echo "backup with zstd start..."
run_br --pd $PD_ADDR backup full -s "local://$TEST_DIR/$DB-zstd" --concurrency 4 --compression zstd --compression-level 6
size_zstd=$(du -d 0 $TEST_DIR/$DB-zstd | awk '{print $1}')

if [ "$size_lz4" -le "$size_zstd" ]; then
  echo "full backup lz4 size $size_lz4 is small than backup with zstd $size_zstd"
  exit -1
fi

for ct in limit lz4 zstd; do
  for i in $(seq $DB_COUNT); do
      run_sql "DROP DATABASE $DB${i};"
  done

  # restore full
  echo "restore with $ct backup start..."
  export GO_FAILPOINTS="github.com/pingcap/tidb/br/pkg/restore/snap_client/restore-storage-error=1*return(\"connection refused\");github.com/pingcap/tidb/br/pkg/restore/restore-gRPC-error=1*return(true)"
  export GO_FAILPOINTS=$GO_FAILPOINTS";github.com/pingcap/tidb/br/pkg/restore/split/no-leader-error=3*return(true)"
  run_br restore full -s "local://$TEST_DIR/$DB-$ct" --pd $PD_ADDR --ratelimit 1024
  export GO_FAILPOINTS=""

  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
done

for granularity in "fine-grained" "coarse-grained"; do
  for i in $(seq $DB_COUNT); do
      run_sql "DROP DATABASE $DB${i};"
  done

  # restore full
  echo "restore with $ct backup start..."
  export GO_FAILPOINTS="github.com/pingcap/tidb/br/pkg/restore/snap_client/restore-storage-error=1*return(\"connection refused\");github.com/pingcap/tidb/br/pkg/restore/restore-gRPC-error=1*return(true)"
  export GO_FAILPOINTS="${GO_FAILPOINTS};github.com/pingcap/tidb/br/pkg/restore/split/no-leader-error=3*return(true)"
  run_br restore full -s "local://$TEST_DIR/$DB-$ct" --pd $PD_ADDR --ratelimit 1024 --granularity=$granularity
  export GO_FAILPOINTS=""

  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] [$granularity] failed!"
      exit 1
  fi
done

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