package saltyim

import (
	"encoding/json"
	"fmt"
	"net/url"

	"github.com/keys-pub/keys"
)

// Addr is a Salty Address in the form of user@domain and is used to discover
// a user's endpoint, domain, avatar service so we can send messages to.
type Addr interface {
	fmt.Stringer
	json.Marshaler

	// IsZero returns true if the address is empty
	IsZero() bool

	// User returns the user part of the address user@domain
	User() string

	// Domain returns the domain part of the address user@domain
	Domain() string

	// Hash returns the Hex(SHA256Sum()) of the Address
	Hash() string

	// Formatted returns a formatted user used in the Salty Message Format
	// <timestamp>\t(<user>) <message>\n
	Formatted() string

	// Key returns the Public Key of this User (Salty Addr) as discovered
	Key() *keys.EdX25519PublicKey

	// Endpoint returns the discovered Endpoint
	Endpoint() *url.URL

	// Cap returns the discovered Capabilities
	Cap() Capabilities

	// DiscoveredDomain returns the discovered domain (if any) of fallbacks to the Domain
	DiscoveredDomain() string

	// URI returns the Well-Known URI for this Addr
	URI() string

	// HashURI returns the Well-Known HashURI for this Addr
	HashURI() string

	// Refresh forces a lookup and configuration fetch for a Salty Address
	Refresh() error

	// Avatar returns the cached avatar service for a Salty Address or performs a DNS lookup
	// for the avatar service to use and cached it (if found) and returns that. If there is no
	// avatar service found, then a default avatar is used for peers.
	Avatar() string

	// WithEndpoint returns a clone of this address with a different endpoint
	// which is mostly useful for sending messages to ourselves or an outbox
	WithEndpoint(endpoint *url.URL) Addr
}