#!/usr/bin/env bash
# Build + deploy di presa-mano con auto-bump della versione.
#
#   ./build.sh            → patch++  (1.0.1 -> 1.0.2)
#   ./build.sh minor      → minor++  (1.0.2 -> 1.1.0)
#   ./build.sh major      → major++  (1.1.0 -> 2.0.0)
#
# La nuova versione + l'ora di build vengono iniettate nell'immagine come
# build-arg e mostrate nel badge in GUI. Il file VERSION viene riscritto ma NON
# committato automaticamente (lo committi tu con le altre modifiche).
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
COMPOSE_DIR="$(dirname "$SCRIPT_DIR")"   # docker-compose.yml sta un livello sopra
VERSION_FILE="$SCRIPT_DIR/VERSION"

[ -f "$VERSION_FILE" ] || echo "1.0.0" > "$VERSION_FILE"
cur="$(tr -d '[:space:]' < "$VERSION_FILE")"
IFS='.' read -r major minor patch <<< "$cur"
major="${major:-1}"; minor="${minor:-0}"; patch="${patch:-0}"

case "${1:-patch}" in
  major) major=$((major + 1)); minor=0; patch=0 ;;
  minor) minor=$((minor + 1)); patch=0 ;;
  patch) patch=$((patch + 1)) ;;
  *) echo "uso: $0 [major|minor|patch]" >&2; exit 1 ;;
esac

new="${major}.${minor}.${patch}"
echo "$new" > "$VERSION_FILE"
build_time="$(date -u +"%Y-%m-%d %H:%M UTC")"

echo "→ build V${new}  (${build_time})"
cd "$COMPOSE_DIR"
docker compose build \
  --build-arg APP_VERSION="$new" \
  --build-arg BUILD_TIME="$build_time" \
  presa-mano
docker compose up -d presa-mano
echo "✓ deployed V${new}  (${build_time})"