#!/bin/bash
# =============================================================================
# Gremlin Stack — Deploy Script
# Usage: ./deploy.sh
# Run from: services/swarm/stack/Gremlin/
# =============================================================================

set -euo pipefail

STACK_NAME="gremlin"
COMPOSE_FILE="gremlin-stack.yml"
ENV_FILE=".env"
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

cd "$SCRIPT_DIR"

if [ ! -f "$ENV_FILE" ]; then
  echo "ERROR: $ENV_FILE not found in $SCRIPT_DIR"
  exit 1
fi

if [ ! -f "$COMPOSE_FILE" ]; then
  echo "ERROR: $COMPOSE_FILE not found in $SCRIPT_DIR"
  exit 1
fi

RESOLVED_FILE="${COMPOSE_FILE%.yml}.resolved.yml"

# Load env vars into shell so docker stack config can resolve them
echo "Loading environment from $ENV_FILE..."
set -a
source "$ENV_FILE"
set +a

# Preprocess — resolves all ${VAR} substitutions natively
echo "Preprocessing stack file..."
docker stack config --compose-file "$COMPOSE_FILE" > "$RESOLVED_FILE"

# Deploy from the resolved file
echo "Deploying stack: $STACK_NAME"
docker stack deploy --compose-file "$RESOLVED_FILE" "$STACK_NAME"

# Remove resolved file — contains plaintext secrets
rm -f "$RESOLVED_FILE"
echo "Cleaned up resolved file."

echo ""
echo "Deploy complete. Checking services..."
sleep 3
docker stack services "$STACK_NAME"