#!/bin/bash
#
# A single executable which starts necessary glance server components
#
# Create a workspace-specific glance config directory and
# wrap the glance-api and glance-registry procs.
#
#
# USAGE: ./glance_start_wrapper <glance_conf_dir>
#
#

if [ $# -ne 1 ]; then
    echo "error: specifiy the glance conf dir"
    exit 1
fi

src_conf_dir="$1"
if [ ! -d "${src_conf_dir}" ]; then
    echo "error: glance conf dir does not exist"
    exit 1
fi

if [ -z ${RIFT_INSTALL+x} ]; then
    echo "error: RIFT_INSTALL is not set"
    exit 1
fi

if [ -z "${RIFT_VAR_ROOT}" ]; then
    if [ -n "${RIFT_INSTALL}" ]; then
        RIFT_VAR_ROOT="${RIFT_INSTALL}/var"
    else
        RIFT_VAR_ROOT="$(mktemp -d)"
        echo "warning: RIFT_VAR_ROOT or RIFT_INSTALL not provided, using temporary directory"
    fi
fi

dest_conf_dir="${RIFT_VAR_ROOT}/glance/conf"
echo "destination glance conf directory: ${dest_conf_dir}"

if [ -e "${dest_conf_dir}" ]; then
    echo "removing ${dest_conf_dir}"
    #rm -rf "${dest_conf_dir}"
fi

mkdir -p "${dest_conf_dir}"

for conf_file in ${src_conf_dir}/*; do
    cp "${conf_file}" ${dest_conf_dir}/
    dest_file="${dest_conf_dir}/$(basename ${conf_file})"
    sed -i "s|{RIFT_VAR_ROOT}|${RIFT_VAR_ROOT}|g" "${dest_file}"
    sed -i "s|{RIFT_INSTALL}|${RIFT_INSTALL}|g" "${dest_file}"
done

mkdir -p ${RIFT_VAR_ROOT}/log/glance

registry_pid=0
api_pid=0
killing=false

function kill_children(){
    if ${killing}; then
        return
    fi
    killing=true

    if [ ${registry_pid} -ne 0 ]; then
        kill ${registry_pid} 2>/dev/null
    fi

    if [ ${api_pid} -ne 0 ]; then
        kill ${api_pid} 2>/dev/null
    fi

    sleep 2

    if [ ${registry_pid} -ne 0 ]; then
        echo "KILL registry pid: ${registry_pid}"
        kill -9 ${registry_pid} 2>/dev/null
    fi

    if [ ${api_pid} -ne 0 ]; then
        echo "KILL api pid: ${api_pid}"
        kill -9 ${api_pid} 2>/dev/null
    fi

    exit 1
}


function kill_group(){
    # Kill any remaining children
    kill_children

    # Kill myself
    kill -9 0
}

trap "kill_children" SIGHUP SIGINT SIGTERM SIGTRAP EXIT
trap "kill_group" SIGCHLD

glance-registry --config-dir ${dest_conf_dir} --config-file ${dest_conf_dir}/glance-registry.conf >/dev/null 2>&1&
registry_pid="$!"
if [ $? -ne 0 ]; then
    echo "ERROR: Glance registry startup failed!" >&2
    exit 1
fi

glance-api --config-dir ${dest_conf_dir} --config-file ${dest_conf_dir}/glance-api.conf >/dev/null 2>&1&
api_pid="$!"
if [ $? -ne 0 ]; then
    echo "ERROR: Glance registry startup failed!" >&2
    exit 1
fi

sleep 5

manage_cfg=""
if [ -e "${dest_conf_dir}/glance-manage.conf" ]; then
    manage_cfg="--config-file ${dest_conf_dir}/glance-manage.conf"
fi

glance-manage --config-dir ${dest_conf_dir} ${manage_cfg} db_sync >/dev/null 2>&1&
if [ $? -ne 0 ]; then
    echo "ERROR: glance-manage db_sync failed" >&2
    exit 1
fi

while true; do
    sleep 1
done