#!/usr/bin/env bash

# User-configurable variables
containerName="postgres-db-name"
postgresUser="postgres-user"
postgresPassword="postgres-password"
postgresDB="postgres-db"

hostPort=5432
containerPort=5432


# Function to create a new container
create_container() {
  echo "Creating container '$containerName'..."
  docker run \
    --name "$containerName" \
    -e POSTGRES_USER="$postgresUser" \
    -e POSTGRES_PASSWORD="$postgresPassword" \
    -e POSTGRES_DB="$postgresDB" \
    -p "$hostPort:$containerPort" \
    -d postgres
}


# Function to start an existing container
start_container() {
  echo "Starting container '$containerName'..."
  docker start "$containerName"
}


# Main script logic

# Check whether the container exists (in any state)
containerExists=$(docker ps -a --filter "name=$containerName" --format "{{.Names}}")

if [ -n "$containerExists" ]; then
  # Container exists, check if it's running
  containerRunning=$(docker ps --filter "name=$containerName" --filter "status=running" --format "{{.Names}}")
  if [ -n "$containerRunning" ]; then
    echo "Container '$containerName' is already running."
  else
    echo "Container '$containerName' exists but is not running."
    if ! start_container; then
      echo "Failed to start container '$containerName'. Removing and recreating it..."
      docker rm "$containerName"
      create_container
    fi
  fi
else
  # Container does not exist, create it
  create_container
fi