#!/bin/bash

prepare_container() {
	SERVICE_NAME=$1
	SERVICE_DISPLAY=$2
	
	echo "Preparing the $SERVICE_DISPLAY service or Docker container ..."

	echo "Checking to see if $SERVICE_DISPLAY service exists ..."
	export CONTAINER_ID=`docker-compose --project-directory "${DOCKER_COMPOSE_DIR}" ps -q $SERVICE_NAME`

	unset CONTAINER_CREATED
	unset CONTAINER_STARTED
	if [[ -z $CONTAINER_ID ]]; then
		create_container $*
	else
		check_container $*
	fi
}

create_container() {
	SERVICE_NAME=$1
	SERVICE_DISPLAY=$2
	export CONTAINER_CREATED=1

	echo "$SERVICE_DISPLAY service does not exist; creating and starting it ..."
	docker-compose --project-directory "${DOCKER_COMPOSE_DIR}" up --detach --no-deps $SERVICE_NAME

	echo "Getting new $SERVICE_DISPLAY service container ID ..."
	export CONTAINER_ID=`docker-compose --project-directory "${DOCKER_COMPOSE_DIR}" ps -q $SERVICE_NAME`
	echo "Found $SERVICE_DISPLAY Docker container: $CONTAINER_ID"
}

check_container() {
	SERVICE_NAME=$1
	SERVICE_DISPLAY=$2

	echo "Found $SERVICE_DISPLAY Docker container: $CONTAINER_ID"

	echo "Checking to see if $SERVICE_DISPLAY service is running ..."
	CONTAINER_TOP=`docker-compose --project-directory "${DOCKER_COMPOSE_DIR}" top $SERVICE_NAME`

	if [[ -z $CONTAINER_TOP ]]; then
		start_container $*
	else
		echo "$SERVICE_DISPLAY service is running; will perform while running ..."
	fi
}

start_container() {
	SERVICE_NAME=$1
	SERVICE_DISPLAY=$2
	export CONTAINER_STARTED=1

	echo "$SERVICE_DISPLAY service is not running; starting it ..."
	docker-compose --project-directory "${DOCKER_COMPOSE_DIR}" start $SERVICE_NAME
}

unwind_container() {
	SERVICE_NAME=$1
	SERVICE_DISPLAY=$2
	CONTAINER_CREATED=$3
	CONTAINER_STARTED=$4

	echo "Unwinding the $SERVICE_DISPLAY service or Docker container ..."

	if [[ $CONTAINER_CREATED ]]; then
		echo "$SERVICE_DISPLAY service did not exist; stopping and destorying it ..."
		docker-compose --project-directory "${DOCKER_COMPOSE_DIR}" rm --stop --force $SERVICE_NAME
	elif [[ $CONTAINER_STARTED ]]; then
		echo "$SERVICE_DISPLAY service was not running; stopping it ..."
		docker-compose --project-directory "${DOCKER_COMPOSE_DIR}" stop $SERVICE_NAME
	fi
}

wait_container_postgres() {
	CONTAINER_ID=$1

	echo "Waiting for PostgreSQL database to become available ..."
	docker container exec $CONTAINER_ID sh -c "until [ -f /var/run/postgresql/.s.PGSQL.5432.lock ]; do sleep 1; done"
}