#!/bin/sh
set -e

# Generate config.json from environment variables at container startup
# This allows runtime configuration without rebuilding the container

CONFIG_FILE="/usr/share/nginx/html/config.json"

echo "🔧 Generating frontend runtime configuration..."

# Use API_URL from environment, or fallback to same origin
API_BASE_URL="${API_URL:-}"

if [ -z "$API_BASE_URL" ]; then
  echo "⚠️  API_URL not set, frontend will auto-detect or use same origin"
  # Create minimal config that triggers auto-detection
  cat > "$CONFIG_FILE" <<EOF
{
  "_comment": "API_URL not configured, using auto-detection"
}
EOF
else
  echo "✅ API URL configured: $API_BASE_URL"
  cat > "$CONFIG_FILE" <<EOF
{
  "apiBaseURL": "$API_BASE_URL"
}
EOF
fi

echo "📄 Generated config.json:"
cat "$CONFIG_FILE"

# Start nginx
echo "🚀 Starting nginx..."
exec nginx -g "daemon off;"