package container

import (
	"fmt"

	"git.frostfs.info/TrueCloudLab/frostfs-contract/rpcclient/container"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
	"github.com/nspcc-dev/neo-go/pkg/core/state"
	"github.com/nspcc-dev/neo-go/pkg/network/payload"
)

// Put structure of container.Put notification from morph chain.
type Put struct {
	rawContainer []byte
	signature    []byte
	publicKey    []byte
	token        []byte

	// For notary notifications only.
	// Contains raw transactions of notary request.
	notaryRequest *payload.P2PNotaryRequest
}

const expectedItemNumPut = 4

// MorphEvent implements Neo:Morph Event interface.
func (Put) MorphEvent() {}

// Container is a marshalled container structure, defined in API.
func (p Put) Container() []byte { return p.rawContainer }

// Signature of marshalled container by container owner.
func (p Put) Signature() []byte { return p.signature }

// PublicKey of container owner.
func (p Put) PublicKey() []byte { return p.publicKey }

// SessionToken returns binary token of the session
// within which the container was created.
func (p Put) SessionToken() []byte {
	return p.token
}

// NotaryRequest returns raw notary request if notification
// was received via notary service. Otherwise, returns nil.
func (p Put) NotaryRequest() *payload.P2PNotaryRequest {
	return p.notaryRequest
}

// PutNamed represents notification event spawned by PutNamed method from Container contract of FrostFS Morph chain.
type PutNamed struct {
	Put

	name, zone string
}

// Name returns "name" arg of contract call.
func (x PutNamed) Name() string {
	return x.name
}

// Zone returns "zone" arg of contract call.
func (x PutNamed) Zone() string {
	return x.zone
}

// PutSuccess structures notification event of successful container creation
// thrown by Container contract.
type PutSuccess struct {
	// Identifier of the newly created container.
	ID cid.ID
}

// MorphEvent implements Neo:Morph Event interface.
func (PutSuccess) MorphEvent() {}

// ParsePutSuccess decodes notification event thrown by Container contract into
// PutSuccess and returns it as event.Event.
func ParsePutSuccess(e *state.ContainedNotificationEvent) (event.Event, error) {
	var pse container.PutSuccessEvent
	if err := pse.FromStackItem(e.Item); err != nil {
		return nil, fmt.Errorf("parse container.PutSuccessEvent: %w", err)
	}

	var cnr cid.ID
	cnr.SetSHA256(pse.ContainerID)
	return PutSuccess{
		ID: cnr,
	}, nil
}