#!/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.

set -eo pipefail

curdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd)"

if [[ "$(uname -s)" == 'Darwin' ]] && command -v brew &>/dev/null; then
    PATH="$(brew --prefix)/opt/gnu-getopt/bin:${PATH}"
    export PATH
fi

OPTS="$(getopt \
    -n "$0" \
    -o '' \
    -l 'daemon' \
    -l 'helper:' \
    -l 'image:' \
    -l 'version' \
    -- "$@")"

eval set -- "${OPTS}"

RUN_DAEMON=0
HELPER=''
IMAGE_PATH=''
IMAGE_TOOL=''
OPT_VERSION=''
while true; do
    case "$1" in
    --daemon)
        RUN_DAEMON=1
        shift
        ;;
    --version)
        OPT_VERSION="--version"
        shift
        ;;
    --helper)
        HELPER="$2"
        shift 2
        ;;
    --image)
        IMAGE_TOOL=1
        IMAGE_PATH="$2"
        shift 2
        ;;
    --)
        shift
        break
        ;;
    *)
        echo "Internal error"
        exit 1
        ;;
    esac
done

DORIS_HOME="$(
    cd "${curdir}/.."
    pwd
)"
export DORIS_HOME

# export env variables from fe.conf
#
# JAVA_OPTS
# LOG_DIR
# PID_DIR
export JAVA_OPTS="-Xmx1024m"
export LOG_DIR="${DORIS_HOME}/log"
PID_DIR="$(
    cd "${curdir}"
    pwd
)"
export PID_DIR

while read -r line; do
    envline="$(echo "${line}" |
        sed 's/[[:blank:]]*=[[:blank:]]*/=/g' |
        sed 's/^[[:blank:]]*//g' |
        grep -E "^[[:upper:]]([[:upper:]]|_|[[:digit:]])*=" ||
        true)"
    envline="$(eval "echo ${envline}")"
    if [[ "${envline}" == *"="* ]]; then
        eval 'export "${envline}"'
    fi
done <"${DORIS_HOME}/conf/fe.conf"

if [[ -e "${DORIS_HOME}/bin/palo_env.sh" ]]; then
    # shellcheck disable=1091
    source "${DORIS_HOME}/bin/palo_env.sh"
fi

if [[ -z "${JAVA_HOME}" ]]; then
    JAVA="$(command -v java)"
else
    JAVA="${JAVA_HOME}/bin/java"
fi

if [[ ! -x "${JAVA}" ]]; then
    echo "The JAVA_HOME environment variable is not defined correctly"
    echo "This environment variable is needed to run this program"
    echo "NB: JAVA_HOME should point to a JDK not a JRE"
    exit 1
fi

# get jdk version, return version as an Integer.
# 1.8 => 8, 13.0 => 13
jdk_version() {
    local java_cmd="${1}"
    local result
    local IFS=$'\n'

    if [[ -z "${java_cmd}" ]]; then
        result=no_java
        return 1
    else
        local version
        # remove \r for Cygwin
        version="$("${java_cmd}" -Xms32M -Xmx32M -version 2>&1 | tr '\r' '\n' | grep version | awk '{print $3}')"
        version="${version//\"/}"
        if [[ "${version}" =~ ^1\. ]]; then
            result="$(echo "${version}" | awk -F '.' '{print $2}')"
        else
            result="$(echo "${version}" | awk -F '.' '{print $1}')"
        fi
    fi
    echo "${result}"
    return 0
}

# need check and create if the log directory existed before outing message to the log file.
if [[ ! -d "${LOG_DIR}" ]]; then
    mkdir -p "${LOG_DIR}"
fi

# check java version and choose correct JAVA_OPTS
java_version="$(
    set -e
    jdk_version "${JAVA}"
)"
final_java_opt="${JAVA_OPTS}"
if [[ "${java_version}" -gt 8 ]]; then
    if [[ -z "${JAVA_OPTS_FOR_JDK_9}" ]]; then
        echo "JAVA_OPTS_FOR_JDK_9 is not set in fe.conf" >>"${LOG_DIR}/fe.out"
        exit 1
    fi
    final_java_opt="${JAVA_OPTS_FOR_JDK_9}"
fi
echo "using java version ${java_version}" >>"${LOG_DIR}/fe.out"
echo "${final_java_opt}" >>"${LOG_DIR}/fe.out"

# add libs to CLASSPATH
DORIS_FE_JAR=
for f in "${DORIS_HOME}/lib"/*.jar; do
    if [[ "${f}" == *"doris-fe.jar" ]]; then
        DORIS_FE_JAR="${f}"
        continue
    fi
    CLASSPATH="${f}:${CLASSPATH}"
done

# make sure the doris-fe.jar is at first order, so that some classed
# with same qualified name can be loaded priority from doris-fe.jar
CLASSPATH="${DORIS_FE_JAR}:${CLASSPATH}"
export CLASSPATH="${CLASSPATH}:${DORIS_HOME}/lib:${DORIS_HOME}/conf"

pidfile="${PID_DIR}/fe.pid"

if [[ -f "${pidfile}" ]]; then
    if kill -0 "$(cat "${pidfile}")" >/dev/null 2>&1; then
        echo "Frontend running as process $(cat "${pidfile}"). Stop it first."
        exit 1
    fi
fi

if [[ ! -f "/bin/limit" ]]; then
    LIMIT=''
else
    LIMIT=/bin/limit
fi

date >>"${LOG_DIR}/fe.out"

if [[ "${HELPER}" != "" ]]; then
    # change it to '-helper' to be compatible with code in Frontend
    HELPER="-helper ${HELPER}"
fi

if [[ "${IMAGE_TOOL}" -eq 1 ]]; then
    if [[ -n "${IMAGE_PATH}" ]]; then
        ${LIMIT:+${LIMIT}} "${JAVA}" ${final_java_opt:+${final_java_opt}} org.apache.doris.DorisFE -i "${IMAGE_PATH}"
    else
        echo "Internal Error. USE IMAGE_TOOL like : ./start_fe.sh --image image_path"
    fi
elif [[ "${RUN_DAEMON}" -eq 1 ]]; then
    nohup ${LIMIT:+${LIMIT}} "${JAVA}" ${final_java_opt:+${final_java_opt}} -XX:-OmitStackTraceInFastThrow -XX:OnOutOfMemoryError="kill -9 %p" org.apache.doris.DorisFE ${HELPER:+${HELPER}} "$@" >>"${LOG_DIR}/fe.out" 2>&1 </dev/null &
else
    export DORIS_LOG_TO_STDERR=1
    ${LIMIT:+${LIMIT}} "${JAVA}" ${final_java_opt:+${final_java_opt}} -XX:-OmitStackTraceInFastThrow -XX:OnOutOfMemoryError="kill -9 %p" org.apache.doris.DorisFE ${HELPER:+${HELPER}} ${OPT_VERSION:+${OPT_VERSION}} "$@" </dev/null
fi

echo $! >"${pidfile}"