// Copyright 2026 Cisco Systems, Inc. and its affiliates
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0

// Package platform selects the appropriate firewall compiler for the current OS.
// Kept separate from internal/firewall to avoid an import cycle between the
// parent package (which defines the Compiler interface and shared types) and
// the pfctl/iptables sub-packages (which implement the interface by importing
// the parent package).
package platform

import (
	"runtime"

	"github.com/defenseclaw/defenseclaw/internal/firewall"
	"github.com/defenseclaw/defenseclaw/internal/firewall/iptables"
	"github.com/defenseclaw/defenseclaw/internal/firewall/pfctl"
)

// NewCompiler returns the appropriate Compiler for the current OS.
// darwin → pfctl, everything else → iptables.
func NewCompiler() firewall.Compiler {
	if runtime.GOOS == "darwin" {
		return pfctl.New()
	}
	return iptables.New()
}
