// 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 couchdb

import (
	"encoding/json"
	"net/http"

	internal "github.com/go-kivik/kivik/v4/int/errors"
)

// deJSONify unmarshals a string, []byte, or json.RawMessage. All other types
// are returned as-is.
func deJSONify(i interface{}) (interface{}, error) {
	var data []byte
	switch t := i.(type) {
	case string:
		data = []byte(t)
	case []byte:
		data = t
	case json.RawMessage:
		data = []byte(t)
	default:
		return i, nil
	}
	var x interface{}
	if err := json.Unmarshal(data, &x); err != nil {
		return nil, &internal.Error{Status: http.StatusBadRequest, Err: err}
	}
	return x, nil
}