package mfa

import (
	"context"
	"errors"

	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
)

type (
	// Storage is an interface for Manager to manage FrostFS objects
	// and metadata in tree service.
	Storage interface {
		// CreateObject creates new FrostFS object.
		CreateObject(context.Context, PrmObjectCreate) (oid.ID, error)
		// GetObject returns payload of FrostFS object.
		GetObject(context.Context, oid.Address) ([]byte, error)
		// DeleteObject deletes FrostFS object.
		DeleteObject(context.Context, oid.Address) error
		// SetTreeNode creates or updates specified tree node the tree service and returns updated data.
		SetTreeNode(ctx context.Context, cnrID cid.ID, name string, meta map[string]string) (*TreeMultiNode, error)
		// GetTreeNode returns data about latest and remaining versions of specified tree node.
		// Must return 'ErrTreeNodeNotFound' if tree does not exist.
		GetTreeNode(ctx context.Context, cnrID cid.ID, name string) (*TreeMultiNode, error)
		// DeleteTreeNode removes all specified tree nodes from the tree and returns copy of it.
		DeleteTreeNode(ctx context.Context, cnrID cid.ID, name string) ([]*TreeNode, error)
		// GetTreeNodes returns all available tree nodes with specified prefix.
		GetTreeNodes(ctx context.Context, cnrID cid.ID, prefix string) ([]*TreeNode, error)
	}

	// TreeNode contains metadata of node in the tree service.
	TreeNode struct {
		Meta map[string]string
	}

	// TreeMultiNode contains metadata of latest and all available versions
	// of node in the tree service.
	TreeMultiNode struct {
		Current TreeNode
		Old     []*TreeNode
	}

	// PrmObjectCreate contains parameters to create new FrostFS object.
	PrmObjectCreate struct {
		Container cid.ID
		Owner     user.ID
		FilePath  string
		Payload   []byte
	}
)

var (
	ErrTreeNodeNotFound = errors.New("tree node not found")
)