#ifndef SMTP_CLIENT_CONNECTION_H
#define SMTP_CLIENT_CONNECTION_H

#include "net.h"
#include "smtp-common.h"

#include "smtp-client-command.h"

enum smtp_capability;

struct smtp_reply;
struct smtp_client;
struct smtp_client_capability_extra;
struct smtp_client_settings;
struct smtp_client_command;

enum smtp_client_connection_ssl_mode {
	SMTP_CLIENT_SSL_MODE_NONE = 0,
	SMTP_CLIENT_SSL_MODE_IMMEDIATE,
	SMTP_CLIENT_SSL_MODE_STARTTLS
};

enum smtp_client_connection_state {
	/* No connection */
	SMTP_CLIENT_CONNECTION_STATE_DISCONNECTED = 0,
	/* Trying to connect */
	SMTP_CLIENT_CONNECTION_STATE_CONNECTING,
	/* Connected, performing handshake */
	SMTP_CLIENT_CONNECTION_STATE_HANDSHAKING,
	/* Handshake ready, trying to authenticate */
	SMTP_CLIENT_CONNECTION_STATE_AUTHENTICATING,
	/* Authenticated, ready to accept commands */
	SMTP_CLIENT_CONNECTION_STATE_READY,
	/* Involved in active transaction */
	SMTP_CLIENT_CONNECTION_STATE_TRANSACTION
};
extern const char *const smtp_client_connection_state_names[];

struct smtp_client_connection *
smtp_client_connection_create(struct smtp_client *client,
			      enum smtp_protocol protocol,
			      const char *host, in_port_t port,
			      enum smtp_client_connection_ssl_mode ssl_mode,
			      const struct smtp_client_settings *set)
			      ATTR_NULL(6);
struct smtp_client_connection *
smtp_client_connection_create_ip(struct smtp_client *client,
				 enum smtp_protocol protocol,
				 const struct ip_addr *ip, in_port_t port,
				 const char *hostname,
				 enum smtp_client_connection_ssl_mode ssl_mode,
				 const struct smtp_client_settings *set)
				 ATTR_NULL(5, 7);
struct smtp_client_connection *
smtp_client_connection_create_unix(struct smtp_client *client,
				   enum smtp_protocol protocol,
				   const char *path,
				   const struct smtp_client_settings *set)
				   ATTR_NULL(4);

void smtp_client_connection_ref(struct smtp_client_connection *conn);
void smtp_client_connection_unref(struct smtp_client_connection **_conn);
void smtp_client_connection_close(struct smtp_client_connection **_conn);

void smtp_client_connection_update_proxy_data(
	struct smtp_client_connection *conn,
	const struct smtp_proxy_data *proxy_data);

void smtp_client_connection_cork(struct smtp_client_connection *conn);
void smtp_client_connection_uncork(struct smtp_client_connection *conn);

void smtp_client_connection_connect(
	struct smtp_client_connection *conn,
	smtp_client_command_callback_t login_callback, void *login_context);
void smtp_client_connection_disconnect(struct smtp_client_connection *conn);

void smtp_client_connection_switch_ioloop(struct smtp_client_connection *conn);

enum smtp_capability
smtp_client_connection_get_capabilities(struct smtp_client_connection *conn);
uoff_t smtp_client_connection_get_size_capability(
	struct smtp_client_connection *conn);
void smtp_client_connection_accept_extra_capability(
	struct smtp_client_connection *conn,
	const struct smtp_client_capability_extra *cap);
const struct smtp_capability_extra *
smtp_client_connection_get_extra_capability(struct smtp_client_connection *conn,
					    const char *name);

enum smtp_client_connection_state
smtp_client_connection_get_state(struct smtp_client_connection *conn);

#endif