package openapi3

import (

	"context"

	"errors"

	"fmt"

	"github.com/getkin/kin-openapi/jsoninfo"

)

// Link is specified by OpenAPI/Swagger standard version 3.0.

type Link struct {

	ExtensionProps

	OperationID  string                 `json:"operationId,omitempty" yaml:"operationId,omitempty"`

	OperationRef string                 `json:"operationRef,omitempty" yaml:"operationRef,omitempty"`

	Description  string                 `json:"description,omitempty" yaml:"description,omitempty"`

	Parameters   map[string]interface{} `json:"parameters,omitempty" yaml:"parameters,omitempty"`

	Server       *Server                `json:"server,omitempty" yaml:"server,omitempty"`

	RequestBody  interface{}            `json:"requestBody,omitempty" yaml:"requestBody,omitempty"`

}

func (value *Link) MarshalJSON() ([]byte, error) {

	return jsoninfo.MarshalStrictStruct(value)

}

func (value *Link) UnmarshalJSON(data []byte) error {

	return jsoninfo.UnmarshalStrictStruct(data, value)

}

func (value *Link) Validate(c context.Context) error {

	if value.OperationID == "" && value.OperationRef == "" {

		return errors.New("missing operationId or operationRef on link")

	}

	if value.OperationID != "" && value.OperationRef != "" {

		return fmt.Errorf("operationId '%s' and operationRef '%s' are mutually exclusive", value.OperationID, value.OperationRef)

	}

	return nil

}