#!/bin/bash
set -euo pipefail

COMPOSE_FILE="docker-compose-deploy.yml"
PACKAGE_JSON="package.json"
STACK_NAME=${STACK_NAME:-utility-bills-tracker}

if [ ! -f "$PACKAGE_JSON" ]; then
  echo "package.json not found" >&2
  exit 1
fi

# Extract version (prefer jq if available)
if command -v jq >/dev/null 2>&1; then
  APP_VERSION=$(jq -r '.version' "$PACKAGE_JSON")
else
  APP_VERSION=$(grep -E '"version"' "$PACKAGE_JSON" | head -1 | sed -E 's/.*"version"[[:space:]]*:[[:space:]]*"([^"]+)".*/\1/')
fi

if [ -z "${APP_VERSION:-}" ] || [ "$APP_VERSION" = "null" ]; then
  echo "Could not determine app version from package.json" >&2
  exit 2
fi

echo "Deploying $STACK_NAME with image version: $APP_VERSION"

# Pass IMAGE_VERSION env var for compose variable substitution
IMAGE_VERSION="$APP_VERSION" docker stack deploy \
  -c "$COMPOSE_FILE" \
  "$STACK_NAME"