#!/bin/bash

help () {
    cat << EOF
Script for setting resin shell environment
resin-vars [options]

Options:
    -h, --help
        Display this help and exit.

    -c, --config-path CONFIG_PATH
        Use a non default config.json file.
        Default: /mnt/conf/config.json
EOF
}

# Parse arguments
while [[ $# > 0 ]]; do
    key=$1
    case $key in
        -h|--help)
            help
            exit 0
            ;;
        -c|--config-path)
            CONFIG_PATH=$2
            shift
            ;;
        *)
            echo "[WARNING] $0 : Argument '$1' unknown. Ignoring."
            ;;
    esac
    shift
done

# Default values
if [ -z "$CONFIG_PATH" ]; then
    CONFIG_PATH=/mnt/conf/config.json
fi

# If config.json provides redefinitions for our vars let us rewrite their
# runtime value
if [ -f $CONFIG_PATH ]
then
    API_ENDPOINT=$(jq --raw-output ".apiEndpoint" $CONFIG_PATH)
    LISTEN_PORT=$(jq --raw-output ".listenPort" $CONFIG_PATH)
    MIXPANEL_TOKEN=$(jq --raw-output ".mixpanelToken" $CONFIG_PATH)
    PUBNUB_PUBLISH_KEY=$(jq --raw-output ".pubnubPublishKey" $CONFIG_PATH)
    PUBNUB_SUBSCRIBE_KEY=$(jq --raw-output ".pubnubSubscribeKey" $CONFIG_PATH)
    REGISTRY_ENDPOINT=$(jq --raw-output ".registryEndpoint" $CONFIG_PATH)
    VPN_ENDPOINT=$(jq --raw-output ".vpnEndpoint" $CONFIG_PATH)
    if [ -z "$API_ENDPOINT" -o -z "$LISTEN_PORT" -o -z "$MIXPANEL_TOKEN" -o -z "$PUBNUB_PUBLISH_KEY" -o -z "$PUBNUB_SUBSCRIBE_KEY" -o -z "$REGISTRY_ENDPOINT" -o -z "$VPN_ENDPOINT" ]; then
        echo "[WARNING] $0 : Couldn't read some variables from $CONFIG_PATH"
    fi
else
    echo "[WARNING] $0 : '$CONFIG_PATH' not found."
fi