#pragma once

#ifdef __cplusplus
extern "C"
{
#endif
#include <bits/types/struct_iovec.h>

#define HTTP_DECODER_TOPIC "HTTP_DECODER_MESSAGE"
    struct http_message;

    enum http_message_type
    {
        HTTP_TRANSACTION_START,

        HTTP_MESSAGE_REQ_LINE,
        HTTP_MESSAGE_REQ_HEADER,
        HTTP_MESSAGE_REQ_HEADER_END,
        HTTP_MESSAGE_REQ_BODY_START,
        HTTP_MESSAGE_REQ_BODY,
        HTTP_MESSAGE_REQ_BODY_END,

        HTTP_MESSAGE_RES_LINE,
        HTTP_MESSAGE_RES_HEADER,
        HTTP_MESSAGE_RES_HEADER_END,
        HTTP_MESSAGE_RES_BODY_START,
        HTTP_MESSAGE_RES_BODY,
        HTTP_MESSAGE_RES_BODY_END,

        HTTP_TRANSACTION_END,

        HTTP_MESSAGE_MAX
    };

    struct http_header
    {
        struct iovec key;
        struct iovec val;
    };

    struct http_request_line
    {
        struct iovec method;
        struct iovec uri;
        struct iovec version;
        int major_version;
        int minor_version;
    };

    struct http_response_line
    {
        struct iovec version;
        struct iovec status;
        int major_version;
        int minor_version;
        int status_code;
    };

    typedef struct iovec hstring;

    enum http_message_type http_message_type_get(const struct http_message *msg);

    void http_message_request_line_get0(const struct http_message *msg, struct http_request_line *line);

    void http_message_response_line_get0(const struct http_message *msg, struct http_response_line *line);

    /*
     *  Pay attention: key->iov_base is case-insensitive.
     */
    void http_message_header_get0(const struct http_message *msg, const struct iovec *key, struct http_header *hdr_result);

    /**
     * @brief loop reading all headers.
     *
     * @retval succeed( >= 0) failed(-1)
     */
    int http_message_header_next(const struct http_message *msg, struct http_header *header);

    /**
     * @retval succeed( >= 0) failed(-1)
     */
    int http_message_reset_header_iter(struct http_message *msg);

    void http_message_raw_body_get0(const struct http_message *msg, struct iovec *body);

    /**
     * @brief If the body hasn't been compressed, same as http_message_raw_body_get0().
     *
     */
    void http_message_decompress_body_get0(const struct http_message *msg, struct iovec *body);

    // raw
    void http_message_raw_url_get0(const struct http_message *msg, struct iovec *url);

    void http_message_decoded_url_get0(const struct http_message *msg, struct iovec *url);

    /**
     * @retval succeed( >= 0) failed(-1)
     */
    int http_message_get_transaction_seq(const struct http_message *msg);

#ifdef __cplusplus
}
#endif
