#!/bin/bash
#

APP_TARGET_PATH=/opt/zigbee2mqtt

my_print()
{
    echo `date` $HOST [$$]: $1
}

fail_loop()
{
    my_print "Start script failed..."
    for (( ; ; ))
    do
        sleep 60
    done
}

check_environment()
{
    fail=0
    # returns 0 if environment is not okay
    if [[ -z $APP_GIT_VERSION ]]; then
        my_print "Environment variable APP_GIT_VERSION does not exist!"
        fail=1
    fi
    if [[ -z $APP_MQTT_SERVER ]]; then
        my_print "Environment variable APP_MQTT_SERVER does not exist!"
        fail=1
    fi
    #
    if [[ $fail -ne 0 ]]; then
        fail_loop
    fi
}



if [[ ! -d $APP_TARGET_PATH ]]; then
    my_print "Directory \"$APP_TARGET_PATH\" does not exist."
fi
if [[ ! -d $APP_TARGET_PATH/.git ]]; then
    check_environment
    my_print "Cloning zigbee2mqtt repository..."
    git clone https://github.com/Koenkk/zigbee2mqtt.git $APP_TARGET_PATH
    my_print "Changing to directory $APP_TARGET_PAT"
    cd $APP_TARGET_PATH
    my_print "Changing to git version $APP_GIT_VERSION"
    git checkout $APP_GIT_VERSION
    my_print "Replacing MQTT servername in $APP_TARGET_PATH/data/configuration.yaml"
    sed -i "s|mqtt://localhost|mqtt://$APP_MQTT_SERVER|g" $APP_TARGET_PATH/data/configuration.yaml
    if [[ ! -z $APP_MQTT_USER ]]; then
        my_print "Adding MQTT username in $APP_TARGET_PATH/data/configuration.yaml"
        sed -i "s|# user: my_user|user: $APP_MQTT_USER|g" $APP_TARGET_PATH/data/configuration.yaml
    fi
    if [[ ! -z $APP_MQTT_PASSWORD ]]; then
        my_print "Adding MQTT password in $APP_TARGET_PATH/data/configuration.yaml"
        sed -i "s|# password: my_password|password: $APP_MQTT_PASSWORD|g" $APP_TARGET_PATH/data/configuration.yaml
    fi
    my_print "Preparing application (npm ci)"
    npm ci
fi

cd $APP_TARGET_PATH
my_print "Starting zigbee2mqtt..."
npm start

my_print "**********************************************************"
my_print "* Start of zigbee2mqtt failed.                           *"
my_print "* Check running npm ci and npm start in /opt/zigbee2mqtt *"
my_print "**********************************************************"
fail_loop