package util

// @license GNU AGPL version 3 or any later version
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

import (
	"errors"
	"reflect"

	"github.com/iancoleman/strcase"
)

func InspectStruct(input interface{}) (map[string]interface{}, error) {
	val := reflect.ValueOf(input)

	if val.Kind() == reflect.Ptr {
		val = val.Elem()
	}

	if val.Kind() == reflect.Map {
		return input.(map[string]interface{}), nil
	}

	if val.Kind() != reflect.Struct {
		return nil, errors.New("Invalid type")
	}

	result := make(map[string]interface{})

	typ := val.Type()
	for i := 0; i < val.NumField(); i++ {
		field := typ.Field(i)
		value := val.Field(i)
		tags := typ.Field(i).Tag
		name := field.Name

		fieldTag := tags.Get("field")

		if fieldTag == "lowerCamel" {
			name = strcase.ToLowerCamel(name)
		}

		result[name] = value.Interface()
	}

	return result, nil
}