#!/usr/bin/env bash
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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.

##############################################################
# This script is used to generate TPC-H data set
##############################################################

set -eo pipefail

ROOT=$(dirname "$0")
ROOT=$(
    cd "${ROOT}"
    pwd
)

CURDIR="${ROOT}"
TPCH_DBGEN_DIR="${CURDIR}/TPC-H_Tools_v3.0.0/dbgen/"
TPCH_DATA_DIR="${CURDIR}/tpch-data/"

usage() {
    echo "
Usage: $0 <options>
  Optional options:
     -s             scale factor, default is 100
     -c             parallelism to generate data of (lineitem, orders, partsupp) table, default is 10

  Eg.
    $0              generate data using default value.
    $0 -s 10        generate data with scale factor 10.
    $0 -s 10 -c 5   generate data with scale factor 10. And using 5 threads to generate data concurrently.
  "
    exit 1
}

OPTS=$(getopt \
    -n "$0" \
    -o '' \
    -o 'hs:c:' \
    -- "$@")

eval set -- "${OPTS}"

SCALE_FACTOR=100
PARALLEL=10
HELP=0

if [[ $# == 0 ]]; then
    usage
fi

while true; do
    case "$1" in
    -h)
        HELP=1
        shift
        ;;
    -s)
        SCALE_FACTOR=$2
        shift 2
        ;;
    -c)
        PARALLEL=$2
        shift 2
        ;;
    --)
        shift
        break
        ;;
    *)
        echo "Internal error"
        exit 1
        ;;
    esac
done

if [[ "${HELP}" -eq 1 ]]; then
    usage
fi

echo "Scale Factor: ${SCALE_FACTOR}"
echo "Parallelism: ${PARALLEL}"

# check if dbgen exists
if [[ ! -f ${TPCH_DBGEN_DIR}/dbgen ]]; then
    echo "${TPCH_DBGEN_DIR}/dbgen does not exist. Run build-tpch-dbgen.sh first to build it first."
    exit 1
fi

if [[ -d ${TPCH_DATA_DIR}/ ]]; then
    echo "${TPCH_DATA_DIR} exists. Remove it before generating data"
    exit 1
fi

mkdir "${TPCH_DATA_DIR}"/

# gen data
cd "${TPCH_DBGEN_DIR}"
echo "Begin to generate data for table: region"
"${TPCH_DBGEN_DIR}"/dbgen -f -s "${SCALE_FACTOR}" -T r
echo "Begin to generate data for table: nation"
"${TPCH_DBGEN_DIR}"/dbgen -f -s "${SCALE_FACTOR}" -T n
echo "Begin to generate data for table: supplier"
"${TPCH_DBGEN_DIR}"/dbgen -f -s "${SCALE_FACTOR}" -T s
echo "Begin to generate data for table: part"
"${TPCH_DBGEN_DIR}"/dbgen -f -s "${SCALE_FACTOR}" -T P
echo "Begin to generate data for table: customer"
"${TPCH_DBGEN_DIR}"/dbgen -f -s "${SCALE_FACTOR}" -T c
echo "Begin to generate data for table: partsupp"
for i in $(seq 1 "${PARALLEL}"); do
    {
        "${TPCH_DBGEN_DIR}"/dbgen -f -s "${SCALE_FACTOR}" -T S -C "${PARALLEL}" -S "${i}"
    } &
done
wait

echo "Begin to generate data for table: orders"
for i in $(seq 1 "${PARALLEL}"); do
    {
        "${TPCH_DBGEN_DIR}"/dbgen -f -s "${SCALE_FACTOR}" -T O -C "${PARALLEL}" -S "${i}"
    } &
done
wait

echo "Begin to generate data for table: lineitem"
for i in $(seq 1 "${PARALLEL}"); do
    {
        "${TPCH_DBGEN_DIR}"/dbgen -f -s "${SCALE_FACTOR}" -T L -C "${PARALLEL}" -S "${i}"
    } &
done
wait

cd -

# move data to ${TPCH_DATA_DIR}
mv "${TPCH_DBGEN_DIR}"/*.tbl* "${TPCH_DATA_DIR}"/

# check data
du -sh "${TPCH_DATA_DIR}"/*.tbl*