#pragma once

/**
** \defgroup httpd_js HTTPD Interface
** Exposes the \ref http server to script and registers a number of built-in
** endpoints.
**
** core/core.js is gradually being moved from JS to C here, at which point this will
** no longer be a bridge between the two and instead primarily expose the web API.
**
** @{
*/

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>

#include "quickjs.h"

static const int64_t k_httpd_auth_refresh_interval = 1ULL * 7 * 24 * 60 * 60 * 1000;

/** A JS context. */
typedef struct JSContext JSContext;

/**
** An HTTP server instance.
*/
typedef struct _tf_http_t tf_http_t;

/**
** An HTTP request.
*/
typedef struct _tf_http_request_t tf_http_request_t;

/**
** An SSB instance.
*/
typedef struct _tf_ssb_t tf_ssb_t;

/**
** A user and app name.
*/
typedef struct _tf_httpd_user_app_t
{
	/** The username. */
	const char* user;
	/** The app name. */
	const char* app;
} tf_httpd_user_app_t;

/**
** Register the HTTP script interface.  Also registers a number of built-in
** request handlers.  An ongoing project is to move the JS request handlers
** into C, after which point this will only do the latter.
** @param context The JS context.
*/
void tf_httpd_register(JSContext* context);

/**
** Create the HTTP server instance.
** @param context The JS context.
*/
tf_http_t* tf_httpd_create(JSContext* context);

/**
** Destroy the HTTP server instance.
** @param http The HTTP server instance.
*/
void tf_httpd_destroy(tf_http_t* http);

/**
** Determine a content-type from a file extension.
** @param ext The file extension.
** @param use_fallback If not found, fallback to application/binary.
** @return A MIME type or NULL.
*/
const char* tf_httpd_ext_to_content_type(const char* ext, bool use_fallback);

/**
** Determine a content type from magic bytes.
** @param bytes The first bytes of a file.
** @param size The length of the bytes.
** @return A MIME type or NULL.
*/
const char* tf_httpd_magic_bytes_to_content_type(const uint8_t* bytes, size_t size);

/**
** Respond with a redirect.
** @param request The HTTP request.
** @return true if redirected.
*/
bool tf_httpd_redirect(tf_http_request_t* request);

/**
** Parse a username and app from a path like /~user/app/.
** @param path The path.
** @param expected_suffix A suffix that is required to be on the path, and removed.
** @return The user and app.  Free with tf_free().
*/
tf_httpd_user_app_t* tf_httpd_parse_user_app_from_path(const char* path, const char* expected_suffix);

/**
** Decode form data into key value pairs.
** @param data The form data string.
** @param length The length of the form data string.
** @return Key values pairs terminated by NULL.
*/
const char** tf_httpd_form_data_decode(const char* data, int length);

/**
** Get a form data value from an array of key value pairs produced by tf_httpd_form_data_decode().
** @param form_data The form data.
** @param key The key for which to fetch the value.
** @return the value for the case-insensitive key or NULL.
*/
const char* tf_httpd_form_data_get(const char** form_data, const char* key);

/**
** Validate a JWT.
** @param ssb The SSB instance.
** @param context A JS context.
** @param jwt The JWT.
** @return The JWT contents if valid.
*/
JSValue tf_httpd_authenticate_jwt(tf_ssb_t* ssb, JSContext* context, const char* jwt);
;

/**
** Make a JS response object for a request.
** @param context The JS context.
** @param request The HTTP request.
** @return The respone object.
*/
JSValue tf_httpd_make_response_object(JSContext* context, tf_http_request_t* request);

/**
** Check if a name meets requirements.
** @param name The name.
** @return true if the name is valid.
*/
bool tf_httpd_is_name_valid(const char* name);

/**
** Make a header for the session cookie.
** @param request The HTTP request.
** @param session_cookie The session cookie.
** @return The header.
*/
const char* tf_httpd_make_set_session_cookie_header(tf_http_request_t* request, const char* session_cookie);

/**
** Make a JWT for the session.
** @param context A JS context.
** @param ssb The SSB instance.
** @param name The username.
** @return The JWT.
*/
const char* tf_httpd_make_session_jwt(JSContext* context, tf_ssb_t* ssb, const char* name);

/**
** Serve a static file.
** @param request The HTTP request.
*/
void tf_httpd_endpoint_static(tf_http_request_t* request);

/**
** View a blob.
** @param request The HTTP request.
*/
void tf_httpd_endpoint_view(tf_http_request_t* request);

/**
** Save a blob or app.
** @param request The HTTP request.
*/
void tf_httpd_endpoint_save(tf_http_request_t* request);

/**
** Delete a blob or app.
** @param request The HTTP request.
*/
void tf_httpd_endpoint_delete(tf_http_request_t* request);

/**
** App endpoint.
** @param request The HTTP request.
*/
void tf_httpd_endpoint_app(tf_http_request_t* request);

/**
** App index endpoint.
** @param request The HTTP request.
*/
void tf_httpd_endpoint_app_index(tf_http_request_t* request);

/**
** Login endpoint.
** @param request The HTTP request.
*/
void tf_httpd_endpoint_login(tf_http_request_t* request);

/**
** Auto-login endpoint.
** @param request The HTTP request.
*/
void tf_httpd_endpoint_login_auto(tf_http_request_t* request);

/**
** Logout endpoint.
** @param request The HTTP request.
*/
void tf_httpd_endpoint_logout(tf_http_request_t* request);

/** @} */