#pragma once

#include <tfe_http.h>
#include <http_parser.h>
#include <sys/queue.h>

typedef int (hf_private_cb)(struct http_half_private * hf_private,
	tfe_http_event ev, const unsigned char * data, size_t len, void * user);

enum hf_private_status
{
	STATUS_INIT,
	STATUS_READING,
	STATUS_COMPLETE,
};

struct http_header_private
{
	TAILQ_ENTRY(http_header_private) next;
	struct http_field_name * field;
	char * value;
};

TAILQ_HEAD(http_header_private_list, http_header_private);
struct http_half_private
{
	/* PUBLIC STRUCTURE */
	struct tfe_http_half hf_public;
	/* SESSION OF THIS REQUEST/RESPONSE */
	struct http_session_private * session;
	/* Callback Function */
	hf_private_cb * event_cb;
	/* Callback Function User Pointer */
	void * event_cb_user;
	/* Callback Function User Pointer Deleter */
	void (* event_cb_user_deleter)(void *);
	/* HTTP PARSER */
	struct http_parser * parse_object;
	/* HTTP PARSER SETTING */
	struct http_parser_settings * parse_settings;
	/* CURSOR RELATED TO DELAYED DATA */
	size_t parse_cursor;
	/* HTTP PARSER'S ERRNO */
	enum http_errno parse_errno;
	/* HEADER K-V */
	struct http_header_private_list header_list;

	/* UNDERLAY BUFFER */
	int method_or_status;
	short major;
	short minor;

	struct evbuffer * evbuf_uri;
	struct evbuffer * evbuf_header_field;
	struct evbuffer * evbuf_header_value;
	struct evbuffer * evbuf_body;

	enum hf_private_status body_status;
	enum hf_private_status message_status;

	/* default stream action */
	enum tfe_stream_action stream_action;
	enum tfe_stream_action user_stream_action;
};

struct http_half_private * hf_private_create(tfe_http_direction ht_dir, short major, short minor);
void hf_private_destory(struct http_half_private * hf_private);

/** Parse the raw tcp input for HTTP half structure
 * @param hf_private
 * 		hf_private handler.
 * @param data
 * 		raw tcp data, used in the stream's callback.
 * @param len
 * 		raw tcp data length.
 * @return
 * 		0 for need more data,
 * 		1 for reach the boundary, need to call http business callbacks,
 * 		-1 for error.
 */
int hf_private_parse(struct http_half_private * hf_private, const unsigned char * data, size_t len);

void hf_private_set_callback(struct http_half_private * hf_private, hf_private_cb * cb,
	void * user, void (* fn_user_deleter)(void *));

struct http_session_private * hs_private_create(struct http_connection_private * hc_private,
	struct http_half_private * hf_private_req, struct http_half_private * hf_private_resp);