#ifndef RESOURCE_H
#define RESOURCE_H

#include "sys.h"

/* A resource contains data that can be retrieved globally by name.
 * If enabled during compilation, resource data is embedded in the
 * executable. Otherwise each resource represents a file on disk. */
struct resource {
    struct string _data;
#if RESOURCES_EMBEDDED
    struct string _file_name;
#else
    struct sys_file _file;
    struct sys_file_map _file_map;
    u8 _file_name_text[256];
    u8 _file_name_len;
#endif
};

struct resource_startup_receipt { i32 _; };
struct resource_startup_receipt resource_startup(void);

struct resource resource_open(struct string path);

#if RESOURCES_EMBEDDED
    #define resource_close(res_ptr)
#else
    void resource_close(struct resource *res_ptr);
#endif

b32 resource_exists(struct string path);

#define resource_get_data(res_ptr) (res_ptr)->_data

#if RESOURCES_EMBEDDED
    #define resource_get_name(res_ptr) (res_ptr)->_file_name
#else
    #define resource_get_name(res_ptr) STRING((res_ptr)->_file_name_len, (res_ptr)->_file_name_text)
#endif

#define RESOURCE_WATCH_CALLBACK_FUNC_DEF(func_name, arg_info) void func_name(struct sys_watch_info *arg_info)
typedef RESOURCE_WATCH_CALLBACK_FUNC_DEF(resource_watch_callback, info);

#if RESOURCE_RELOADING
    void resource_register_watch_callback(resource_watch_callback *callback);
#else
    #define resource_register_watch_callback(callback)
#endif

#endif