#!/usr/bin/env bash
#
# Build and push BanGUI container images to the Gitea registry.
#
# Usage:
#   ./push.sh              # builds & pushes with tag "latest"
#   ./push.sh v1.2.3       # builds & pushes with tag "v1.2.3"
#   ./push.sh v1.2.3 --no-build   # pushes existing images only
#
# Prerequisites:
#   podman login git.lpl-mind.de   (or: docker login git.lpl-mind.de)

set -euo pipefail

# ---------------------------------------------------------------------------
# Configuration
# ---------------------------------------------------------------------------
REGISTRY="git.lpl-mind.de"
NAMESPACE="lukas.pupkalipinski"
PROJECT="bangui"

BACKEND_IMAGE="${REGISTRY}/${NAMESPACE}/${PROJECT}/backend"
FRONTEND_IMAGE="${REGISTRY}/${NAMESPACE}/${PROJECT}/frontend"

TAG="${1:-latest}"
SKIP_BUILD=false
if [[ "${2:-}" == "--no-build" ]]; then
    SKIP_BUILD=true
fi

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"

# ---------------------------------------------------------------------------
# Helpers
# ---------------------------------------------------------------------------
log() { echo -e "\n>>> $*"; }
err() { echo -e "\nERROR: $*" >&2; exit 1; }

# Detect container engine (podman preferred, docker fallback)
if command -v podman &>/dev/null; then
    ENGINE="podman"
elif command -v docker &>/dev/null; then
    ENGINE="docker"
else
    err "Neither podman nor docker is installed."
fi

# ---------------------------------------------------------------------------
# Pre-flight checks
# ---------------------------------------------------------------------------
echo "============================================"
echo " BanGUI — Build & Push"
echo " Engine   : ${ENGINE}"
echo " Registry : ${REGISTRY}"
echo " Tag      : ${TAG}"
echo "============================================"

if [[ "${ENGINE}" == "podman" ]]; then
    if ! podman login --get-login "${REGISTRY}" &>/dev/null; then
        err "Not logged in. Run:\n  podman login ${REGISTRY}"
    fi
fi

# ---------------------------------------------------------------------------
# Build
# ---------------------------------------------------------------------------
if [[ "${SKIP_BUILD}" == false ]]; then
    log "Building backend image  →  ${BACKEND_IMAGE}:${TAG}"
    "${ENGINE}" build \
        -t "${BACKEND_IMAGE}:${TAG}" \
        -f "${SCRIPT_DIR}/Dockerfile.backend" \
        "${PROJECT_ROOT}"

    log "Building frontend image  →  ${FRONTEND_IMAGE}:${TAG}"
    "${ENGINE}" build \
        -t "${FRONTEND_IMAGE}:${TAG}" \
        -f "${SCRIPT_DIR}/Dockerfile.frontend" \
        "${PROJECT_ROOT}"
fi

# ---------------------------------------------------------------------------
# Push
# ---------------------------------------------------------------------------
log "Pushing ${BACKEND_IMAGE}:${TAG}"
"${ENGINE}" push "${BACKEND_IMAGE}:${TAG}"

log "Pushing ${FRONTEND_IMAGE}:${TAG}"
"${ENGINE}" push "${FRONTEND_IMAGE}:${TAG}"

# ---------------------------------------------------------------------------
# Summary
# ---------------------------------------------------------------------------
echo ""
echo "============================================"
echo "  Push complete!"
echo ""
echo " Images:"
echo "   ${BACKEND_IMAGE}:${TAG}"
echo "   ${FRONTEND_IMAGE}:${TAG}"
echo ""
echo " Deploy on server:"
echo "   ${ENGINE} login ${REGISTRY}"
echo "   ${ENGINE} compose -f Docker/compose.prod.yml pull"
echo "   ${ENGINE} compose -f Docker/compose.prod.yml up -d"
echo "============================================"