// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 fileset

import (
	"fmt"

	"github.com/elastic/beats/libbeat/common"
	"github.com/elastic/beats/libbeat/common/cfgwarn"
)

// ModuleConfig contains the configuration file options for a module
type ModuleConfig struct {
	Module  string `config:"module"     validate:"required"`
	Enabled *bool  `config:"enabled"`

	// Filesets is inlined by code, see mcfgFromConfig
	Filesets map[string]*FilesetConfig
}

// FilesetConfig contains the configuration file options for a fileset
type FilesetConfig struct {
	Enabled    *bool                  `config:"enabled"`
	Var        map[string]interface{} `config:"var"`
	Input      map[string]interface{} `config:"input"`
	Prospector map[string]interface{} `config:"prospector"`
}

// NewFilesetConfig creates a new FilesetConfig from a common.Config.
func NewFilesetConfig(cfg *common.Config) (*FilesetConfig, error) {
	var fcfg FilesetConfig
	err := cfg.Unpack(&fcfg)
	if err != nil {
		return nil, fmt.Errorf("error unpacking configuration")
	}

	if len(fcfg.Prospector) > 0 {
		cfgwarn.Deprecate("7.0.0", "prospector is deprecated. Use `input` instead.")
		if len(fcfg.Input) > 0 {
			return nil, fmt.Errorf("error prospector and input are defined in the fileset, use only input")
		}
		fcfg.Input = fcfg.Prospector
	}
	return &fcfg, nil
}