#pragma once
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>

#include <tfe_utils.h>
#include <tfe_future.h>
#include <tfe_stream.h>

/* Copy from http_parser.h */
#define HTTP_METHOD_MAP(XX)         \
  XX(0,  DELETE,      DELETE)       \
  XX(1,  GET,         GET)          \
  XX(2,  HEAD,        HEAD)         \
  XX(3,  POST,        POST)         \
  XX(4,  PUT,         PUT)          \
  /* pathological */                \
  XX(5,  CONNECT,     CONNECT)      \
  XX(6,  OPTIONS,     OPTIONS)      \
  XX(7,  TRACE,       TRACE)        \
  /* WebDAV */                      \
  XX(8,  COPY,        COPY)         \
  XX(9,  LOCK,        LOCK)         \
  XX(10, MKCOL,       MKCOL)        \
  XX(11, MOVE,        MOVE)         \
  XX(12, PROPFIND,    PROPFIND)     \
  XX(13, PROPPATCH,   PROPPATCH)    \
  XX(14, SEARCH,      SEARCH)       \
  XX(15, UNLOCK,      UNLOCK)       \
  XX(16, BIND,        BIND)         \
  XX(17, REBIND,      REBIND)       \
  XX(18, UNBIND,      UNBIND)       \
  XX(19, ACL,         ACL)          \
  /* subversion */                  \
  XX(20, REPORT,      REPORT)       \
  XX(21, MKACTIVITY,  MKACTIVITY)   \
  XX(22, CHECKOUT,    CHECKOUT)     \
  XX(23, MERGE,       MERGE)        \
  /* upnp */                        \
  XX(24, MSEARCH,     M-SEARCH)     \
  XX(25, NOTIFY,      NOTIFY)       \
  XX(26, SUBSCRIBE,   SUBSCRIBE)    \
  XX(27, UNSUBSCRIBE, UNSUBSCRIBE)  \
  /* RFC-5789 */                    \
  XX(28, PATCH,       PATCH)        \
  XX(29, PURGE,       PURGE)        \
  /* CalDAV */                      \
  XX(30, MKCALENDAR,  MKCALENDAR)   \
  /* RFC-2068, section 19.6.1.2 */  \
  XX(31, LINK,        LINK)         \
  XX(32, UNLINK,      UNLINK)       \
  /* icecast */                     \
  XX(33, SOURCE,      SOURCE)       \

enum tfe_http_std_method
{
#define XX(num, name, string) TFE_HTTP_##name = num,
	HTTP_METHOD_MAP(XX)
#undef XX
};

enum tfe_http_std_field
{
	TFE_HTTP_UNKNOWN_FIELD = 0,
	TFE_HTTP_HOST,
	TFE_HTTP_REFERER,
	TFE_HTTP_USER_AGENT,
	TFE_HTTP_COOKIE,
	TFE_HTTP_PROXY_AUTHORIZATION,
	TFE_HTTP_AUTHORIZATION,
	TFE_HTTP_LOCATION,
	TFE_HTTP_SERVER,
	TFE_HTTP_ETAG,
	TFE_HTTP_DATE,
	TFE_HTTP_TRAILER,
	TFE_HTTP_TRANSFER_ENCODING,
	TFE_HTTP_VIA,
	TFE_HTTP_PRAGMA,
	TFE_HTTP_CONNECTION,
	TFE_HTTP_CONT_ENCODING,
	TFE_HTTP_CONT_LANGUAGE,
	TFE_HTTP_CONT_LOCATION,
	TFE_HTTP_CONT_RANGE,
	TFE_HTTP_CONT_LENGTH,
	TFE_HTTP_CONT_TYPE,
	TFE_HTTP_CONT_DISPOSITION,
	TFE_HTTP_EXPIRES,
	TFE_HTTP_ACCEPT_ENCODING,
};

enum http_ev_bit_number
{
	REQ_HDR_BITNUM = 0,
	REQ_BODY_BEGIN_BITNUM,
	REQ_BODY_CONT_BITNUM,
	REQ_BODY_END_BITNUM,
	REQ_END_BITNUM,
	RESP_HDR_BITNUM,
	RESP_BODY_BEGIN_BITNUM,
	RESP_BODY_CONT_BITNUM,
	RESP_BODY_END_BITNUM,
	RESP_END_BITNUM
};

enum tfe_http_event
{
	EV_HTTP_REQ_HDR = 1ULL << REQ_HDR_BITNUM,
	EV_HTTP_REQ_BODY_BEGIN = 1ULL << REQ_BODY_BEGIN_BITNUM,
	EV_HTTP_REQ_BODY_CONT = 1ULL << REQ_BODY_CONT_BITNUM,
	EV_HTTP_REQ_BODY_END = 1ULL << REQ_BODY_END_BITNUM,
	EV_HTTP_REQ_END = 1ULL << REQ_END_BITNUM,
	EV_HTTP_RESP_HDR = 1ULL << RESP_HDR_BITNUM,
	EV_HTTP_RESP_BODY_BEGIN = 1ULL << RESP_BODY_BEGIN_BITNUM,
	EV_HTTP_RESP_BODY_CONT = 1ULL << RESP_BODY_CONT_BITNUM,
	EV_HTTP_RESP_BODY_END = 1ULL << RESP_BODY_END_BITNUM,
	EV_HTTP_RESP_END = 1ULL << RESP_END_BITNUM,
};

struct tfe_http_req_spec
{
	enum tfe_http_std_method method;
	const char * uri;
	const char * host;
	const char * url; //uri+host
};

struct tfe_http_resp_spec
{
	int resp_code;
	const char * content_encoding;
};

enum tfe_http_direction
{
	TFE_HTTP_REQUEST = 1,
	TFE_HTTP_RESPONSE = 2
};

struct tfe_http_half_ops
{
	const char * (* ops_http_field_read)(const struct tfe_http_half *, const struct http_field_name *);
	int (* ops_http_field_write)(struct tfe_http_half *, const struct http_field_name *, const char *);
	struct tfe_http_half * (* ops_http_allow_write)(const struct tfe_http_half *);
	const char * (* ops_http_field_iterate)(const struct tfe_http_half *, void **, struct http_field_name *);
	int (* ops_append_body)(struct tfe_http_half *, char *, size_t, int);
	void (* ops_free)(struct tfe_http_half * half);
};

struct tfe_http_session_ops
{
	struct tfe_http_session * (* ops_allow_write)(const struct tfe_http_session * session);
	void (* ops_detach)(const struct tfe_http_session * session);
	void (* ops_drop)(struct tfe_http_session * session);

	void (* ops_request_set)(struct tfe_http_session * session, struct tfe_http_half * req);
	void (* ops_response_set)(struct tfe_http_session * session, struct tfe_http_half * resp);

	struct tfe_http_half * (* ops_request_create)(struct tfe_http_session * session,
		enum tfe_http_std_method method, const char * uri);
	struct tfe_http_half * (* ops_response_create)(struct tfe_http_session * session, int resp_code);
};

struct tfe_http_half
{
	enum tfe_http_direction direction;
	const struct tfe_http_half_ops * ops;
	short major_version;
	short minor_version;

	union
	{
		struct tfe_http_req_spec req_spec;
		struct tfe_http_resp_spec resp_spec;
	};
};

struct tfe_http_session
{
	unsigned int session_id;
	struct tfe_http_session_ops * ops;
	struct tfe_http_half * req;
	struct tfe_http_half * resp;
};

struct http_field_name
{
	/* Standard Field */
	enum tfe_http_std_field field_id;
	/* Non-NULL when field_id is HTTP_UNKNOWN_FIELD */
	const char * field_name;
};

typedef void (http_session_begin_cb)(const struct tfe_stream * stream,
	const struct tfe_http_session * session, unsigned int thread_id, void ** pme);

typedef void (http_session_data_cb)(const struct tfe_stream * stream,
	const struct tfe_http_session * session, enum tfe_http_event event, const unsigned char * data,
	size_t datalen, unsigned int thread_id, void ** pme);

typedef void (http_session_end_cb)(const struct tfe_stream * stream,
	const struct tfe_http_session * session, unsigned int thread_id, void ** pme);

/* Tools functions for standard HTTP header field name */
struct http_field_name * http_field_name_duplicate(const struct http_field_name * orig);
int http_field_name_compare(const struct http_field_name * lvalue, const struct http_field_name * rvalue);
const char * http_field_to_string(const struct http_field_name * field);
void http_field_destory(struct http_field_name *);

/* Tools functions for standard HTTP method */
const char * http_std_method_to_string(enum tfe_http_std_method method);
enum tfe_http_std_method http_std_method_construct(const char * str_method);

static inline const char * tfe_http_field_read(const struct tfe_http_half * half,
	const struct http_field_name * name)
{
	return half->ops->ops_http_field_read(half, name);
}

static inline int tfe_http_field_write(struct tfe_http_half * half,
	const struct http_field_name * name, const char * value)
{
	return half->ops->ops_http_field_write(half, name, value);
}

static inline struct tfe_http_half * tfe_http_allow_write(const struct tfe_http_half * half)
{
	return half->ops->ops_http_allow_write(half);
}

static inline const char * tfe_http_field_iterate(const struct tfe_http_half * half,
	void ** interator, struct http_field_name * name)
{
	return half->ops->ops_http_field_iterate(half, interator, name);
}

static inline int tfe_http_half_append_body(struct tfe_http_half * half, char * buff, size_t size, int flag)
{
	return half->ops->ops_append_body(half, buff, size, flag);
}

static inline void tfe_http_half_free(struct tfe_http_half * half)
{
	return half->ops->ops_free(half);
}

static inline struct tfe_http_session * tfe_http_session_allow_write(const struct tfe_http_session * session)
{
	return session->ops->ops_allow_write(session);
}

static inline void tfe_http_session_detach(const struct tfe_http_session * session)
{
	return session->ops->ops_detach(session);
}

static inline void tfe_http_session_drop(struct tfe_http_session * session)
{
	return session->ops->ops_drop(session);
}

static inline void tfe_http_session_request_set(struct tfe_http_session * session, struct tfe_http_half * req)
{
	return session->ops->ops_request_set(session, req);
}

static inline void tfe_http_session_response_set(struct tfe_http_session * session, struct tfe_http_half * resp)
{
	return session->ops->ops_response_set(session, resp);
}

static inline struct tfe_http_half * tfe_http_session_request_create(struct tfe_http_session * session,
	enum tfe_http_std_method method, const char * uri)
{
	return session->ops->ops_request_create(session, method, uri);
}

static inline struct tfe_http_half * tfe_http_session_response_create(struct tfe_http_session * session, int resp_code)
{
	return session->ops->ops_response_create(session, resp_code);
}


//@flag EV_HTTP_RESP_BODY_END, EV_HTTP_RESP_BODY_FULL,
//suspend stream on EV_HTTP_REQ_BODY_BEGIN, resume when EV_HTTP_REQ_BODY_END.


/*
handler_
{
    tfe_http_response_frag_create;
    tfe_http_session_set_half;
}

rpc_cb_
{
    tfe_http_set_field
    tfe_http_append_body

    tfe_http_write();
}


rpc_finish_cb_
{
    tfe_http_write_finish();
};
*/

/* TODO: transfer these declaration to ht_frame.h */
struct http_frame_plugin_status
{
	void * pme;
	unsigned int detached;
	unsigned int preempt;
};

struct http_frame_session_ctx * http_frame_raise_session_begin(const tfe_stream * stream,
	struct tfe_http_session * ht_session, unsigned int thread_id);

void http_frame_raise_session_end(struct http_frame_session_ctx * ht_frame, struct tfe_stream * stream,
	struct tfe_http_session * ht_session, unsigned int thread_id);

void http_frame_raise_event(struct http_frame_session_ctx * ht_frame,
	const struct tfe_stream * stream, struct tfe_http_session * ht_session, enum tfe_http_event event,
	const unsigned char * data, size_t datalen, unsigned int thread_id);

void http_frame_currect_plugin_detach(struct http_frame_session_ctx * ht_frame);
int http_frame_currect_plugin_preempt(struct http_frame_session_ctx * ht_frame);