// Copyright 2025 Apollo Authors
//
// 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 yaml

import (
	"bytes"

	"github.com/spf13/viper"

	"github.com/apolloconfig/agollo/v4/utils"
)

var vp = viper.New()

func init() {
	vp.SetConfigType("yaml")
}

// Parser properties转换器
type Parser struct {
}

// Parse 内存内容=>yml文件转换器
func (d *Parser) Parse(configContent interface{}) (map[string]interface{}, error) {
	content, ok := configContent.(string)
	if !ok {
		return nil, nil
	}
	if utils.Empty == content {
		return nil, nil
	}

	buffer := bytes.NewBufferString(content)
	// 使用viper解析
	err := vp.ReadConfig(buffer)
	if err != nil {
		return nil, err
	}

	return convertToMap(vp), nil
}

func convertToMap(vp *viper.Viper) map[string]interface{} {
	if vp == nil {
		return nil
	}

	m := make(map[string]interface{})
	for _, key := range vp.AllKeys() {
		m[key] = vp.Get(key)
	}
	return m
}
