//
// Copyright (c) 2018
// Mainflux
//
// SPDX-License-Identifier: Apache-2.0
//

package bootstrap

const (
	// Inactive Thing is created, but not able to exchange messages using Mainflux.
	Inactive State = iota
	// Active Thing is created, configured, and whitelisted.
	Active
)

// Config represents Configuration entity. It wraps information about external entity
// as well as info about corresponding Mainflux entities.
// MFThing represents corresponding Mainflux Thing ID.
// MFKey is key of corresponding Mainflux Thing.
// MFChannels is a list of Mainflux Channels corresponding Mainflux Thing connects to.
type Config struct {
	MFThing     string
	Owner       string
	Name        string
	MFKey       string
	MFChannels  []Channel
	ExternalID  string
	ExternalKey string
	Content     string
	State       State
}

// Channel represents Mainflux channel corresponding Mainflux Thing is connected to.
type Channel struct {
	ID       string
	Name     string
	Metadata interface{}
}

// Filter is used for the search filters.
type Filter struct {
	Unknown      bool
	FullMatch    map[string]string
	PartialMatch map[string]string
}

// ConfigRepository specifies a Config persistence API.
type ConfigRepository interface {
	// Save persists the Config. Successful operation is indicated by non-nil
	// error response.
	Save(Config) (string, error)

	// RetrieveByID retrieves the Config having the provided identifier, that is owned
	// by the specified user.
	RetrieveByID(string, string) (Config, error)

	// RetrieveAll retrieves the subset of Configs that are owned by the specific user,
	// with given filter parameters.
	RetrieveAll(string, Filter, uint64, uint64) []Config

	// RetrieveByExternalID returns Config for given external ID.
	RetrieveByExternalID(string, string) (Config, error)

	// Update performs and update to an existing Config. A non-nil error is returned
	// to indicate operation failure.
	Update(Config) error

	// Remove removes the Config having the provided identifier, that is owned
	// by the specified user.
	Remove(string, string) error

	// ChangeState changes of the Config, that is owned by the specific user.
	ChangeState(string, string, State) error

	// SaveUnknown saves Thing which unsuccessfully bootstrapped.
	SaveUnknown(string, string) error

	// RetrieveUnknown returns list of unsuccessfully bootstrapped Things.
	RetrieveUnknown(uint64, uint64) []Config

	// RemoveUnknown removes unsuccessfully bootstrapped Thing. This is done once the
	// corresponding Config is added to the list of existing configs (Save method).
	RemoveUnknown(string, string) error
}