#!/bin/bash

if [[ "$(id -u)" -ne "0" ]]; then
    echo "This script must be run as a superuser"
    exit 1
fi

# Help menu
display_help() {
    echo "Usage: $0 [arguments...]"
    echo
    echo "Options:"
    echo "  -h, --help                         show help menu"
    echo "  --domain arg                       configure application domain and exit"
    echo "  --enable-automatic-configuration   enable automatic IP configuration"
    echo "  --disable-automatic-configuration  disable automatic IP configuration"
}

# Default options
domain=""
disable_automatic_updates=true

if [[ "$#" -eq 0 ]]; then
    echo "No arguments were specified"
    display_help
    exit 1
fi

# Parse CLI arguments
while [[ "$#" -gt 0 ]]; do
    case "$1" in
        --domain)
            shift
            domain="${1:?missing domain value}"
            ;;
        --disable-automatic-configuration)
            disable_automatic_updates=true
            ;;
        --enable-automatic-configuration)
            disable_automatic_updates=false
            ;;
        -h|--help)
            display_help
            exit
            ;;
        *)
            echo "Unknown parameter $1"
            display_help
            exit 1
    esac
    shift
done

# Paths to modifier files
app_domain_file="/opt/bitnami/.app_domain"
disable_file="/opt/bitnami/.app_domain_disabled"

# Updates the domain for all installed apps
update_domains() {
  /opt/bitnami/nami/bin/provisioner     --only-recipes configure-host callRecipes afterStart
}

if "$disable_automatic_updates"; then
    # Configuring a domain will always disable automatic domain configuration when the IP address changes
    if [[ -n "$domain" ]]; then
        echo "Configuring domain to ${domain}"
        echo "$domain" > "$app_domain_file"
        rm -f "$disable_file"
        update_domains
    fi

    echo "Disabling automatic domain update for IP address changes"
    touch "$disable_file"
else
    echo "Enabling automatic domain update for IP address changes"
    rm -f "$app_domain_file" "$disable_file"
    update_domains
fi