// Copyright 2026 Microsoft Corporation
//
// 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.

package policy

import (
	"fmt"
	"os"

	"sigs.k8s.io/yaml"
)

// Load reads and parses a policy file from disk.
func Load(path string) (*Policy, error) {
	if path == "" {
		return nil, fmt.Errorf("policy path is required")
	}

	content, err := os.ReadFile(path)
	if err != nil {
		return nil, fmt.Errorf("failed to read policy file %q: %w", path, err)
	}

	var out Policy
	if err := yaml.Unmarshal(content, &out); err != nil {
		return nil, fmt.Errorf("failed to parse policy file %q: %w", path, err)
	}
	return &out, nil
}
