#!/bin/bash
set -euo pipefail

# Simple script to update stack.production.yml hostname constraint
# Usage: ./update-stack-hostname.sh [target_hostname]
# Example: ./update-stack-hostname.sh ingress

TARGET_HOSTNAME="${1:-ingress}"
STACK_FILE="stack.production.yml"

if [ ! -f "${STACK_FILE}" ]; then
    echo "Error: ${STACK_FILE} not found"
    exit 1
fi

echo "Updating ${STACK_FILE} to use hostname: ${TARGET_HOSTNAME}"

# Create backup
cp "${STACK_FILE}" "${STACK_FILE}.bak.$(date +%Y%m%d-%H%M%S)"

# Update hostname (handles both macOS and Linux sed)
if [[ "$OSTYPE" == "darwin"* ]]; then
    sed -i '' "s/node.hostname == macmini3/node.hostname == ${TARGET_HOSTNAME}/g" "${STACK_FILE}"
else
    sed -i "s/node.hostname == macmini3/node.hostname == ${TARGET_HOSTNAME}/g" "${STACK_FILE}"
fi

echo "Updated ${STACK_FILE}"
echo "Backup saved with timestamp suffix"
echo ""
echo "Changes:"
git diff "${STACK_FILE}" || echo "No git diff available"