#pragma once

#include <string.h>
#include "httpd-types.h"

#define HTTPD_ESPFS_TOKEN_LEN 64

/**
 * The template substitution callback.
 * Returns CGI_MORE if more should be sent within the token, CGI_DONE otherwise.
 * If token is NULL, we're doing a clean-up at the end of the request, this is a good place to free any user data.
 */
typedef httpd_cgi_state (* TplCallback)(HttpdConnData *conn, const char *token);

/**
 * Serve a static file from EspFs. The file name is in the first CGI arg. If NULL, the URI is used as a file name.
 *
 * @param connData
 * @return CGI state
 */
httpd_cgi_state cgiEspFsStaticFile(HttpdConnData *connData);

/**
 * Serve a template from EspFs.
 *
 * - The first arg is the TplCallback replacer function.
 * - The second arg is the file name, if given, otherwise the URI is used as a file name
 *
 * @param conn
 * @return CGI state
 */
httpd_cgi_state cgiEspFsTemplate(HttpdConnData *conn);

/**
 * Send template substitution string with known len
 *
 * @param td - template data
 * @param str - string to send
 * @param len - string len
 * @return 1 = OK
 */
int tplSendN(HttpdConnData *conn, const char *str, size_t len);

/**
 * Send template substitution string (use strlen)
 *
 * @param tpd - template data
 * @param str - string to send
 * @return 1 = OK
 */
static inline int tplSend(HttpdConnData *conn, const char *str) {
    return tplSendN(conn, str, strlen(str));
}