#!/usr/bin/env bash
set -e

# Function to preserve and update container
preserve_and_update_container() {
    local container=$1
    local image=$(docker inspect --format '{{.Config.Image}}' "$container")

    # Pull the latest image version
    docker pull $image

    # Compare image IDs to determine if an update is needed
    local latest_image_id=$(docker inspect --format '{{.Id}}' $image)
    local container_image_id=$(docker inspect --format '{{.Image}}' "$container")

    if [[ "$latest_image_id" != "$container_image_id" ]]; then
        echo "Updating $container..."

        # Capture current configurations
        local env_vars=$(docker inspect $container --format '{{range .Config.Env}}{{println .}}{{end}}')
        local volumes=$(docker inspect $container --format '{{range .Mounts}}{{println .Source ":" .Destination}}{{end}}')
        local network=$(docker network ls --filter id=$(docker inspect $container --format '{{.HostConfig.NetworkMode}}') --format '{{.Name}}')

        # Remove the outdated container
        docker rm -f $container

        # Recreate the container with the same configurations
        docker run -d --name $container $(echo "$env_vars" | xargs -I {} echo --env '{}') $(echo "$volumes" | xargs -I {} echo -v '{}') --network="$network" $image
        echo "$container updated successfully."
    else
        echo "$container is already up to date."
    fi
}

# Iterate over all running containers
for container in $(docker ps --format "{{.Names}}"); do
    preserve_and_update_container $container
done

echo "Container update check complete while preserving existing container configurations."