#!/usr/bin/env bash
set -euo pipefail

# Build and push multiple Docker images to a registry (GHCR or self-hosted)
# Usage:
#   ./build_and_push_ghcr.sh [TAG]
# Environment variables (defaults shown):
#   TAG (arg or env, default: latest)
#   IMAGE_REGISTRY (default: ghcr.io)
#   OWNER (default: marcopedone)
#   SERVICES (space-separated list, default: backend web db)
#   USERNAME (optional): registry username for docker login
#   TOKEN (optional): registry password/token for docker login
#
# The script expects subfolders for services when building from source:
#  - db -> ./apps/db
#  - backend -> ./apps/backend
#  - web -> ./apps/infoalloggi

: "${TAG:?TAG is required}"
: "${IMAGE_REGISTRY:?IMAGE_REGISTRY is required}"
: "${PREFIX:?PREFIX is required}"
: "${OWNER:?OWNER is required}"
: "${SERVICES:?SERVICES is required}"
: "${USERNAME:?USERNAME is required}"
: "${TOKEN:?TOKEN is required}"
: "${ENV_FILE:?ENV_FILE is required}"

set -x

# Optional login
if [[ -n "${USERNAME}" && -n "${TOKEN}" ]]; then
  echo "Logging into ${IMAGE_REGISTRY} as ${USERNAME}..."
  echo "${TOKEN}" | docker login "${IMAGE_REGISTRY}" -u "${USERNAME}" --password-stdin
else
  echo "No credentials provided; assuming you're already logged into ${IMAGE_REGISTRY} or using a credential helper."
fi

for svc in ${SERVICES}; do
  case "${svc}" in
    db)
      ctx="./apps/db"
      dockerfile="Dockerfile"
      ;;
    backend)
      ctx="./apps/backend"
      dockerfile="Dockerfile"
      ;;
    web)
      ctx="./apps/infoalloggi"
      dockerfile="Dockerfile"
      ;;
    *)
      echo "Unknown service: ${svc}, skipping...";
      continue
      ;;
  esac

  IMAGE="${IMAGE_REGISTRY}/${OWNER}/${PREFIX}-${svc}:${TAG}"
  echo "Building ${PREFIX}-${svc} -> ${IMAGE} (context: ${ctx})"
  docker build --build-arg ENV_FILE="${ENV_FILE}" -t "${IMAGE}" -f "$ctx/$dockerfile" "$ctx"

  echo "Pushing ${IMAGE}"
  docker push "${IMAGE}"
done

echo "All done. Built and pushed services: ${SERVICES} with tag ${TAG} to ${IMAGE_REGISTRY}/${OWNER}/${PREFIX}-<service>:${TAG}"