#ifndef L2SU_MAIN_H_INCLUDED
#define L2SU_MAIN_H_INCLUDED

#include "command.h"
#include "digest/digest.h"
#include "instance.h"
#include "version.h"
#include "macros.h"
#include "user.h"

#include <fcntl.h>
#include <time.h>
#include <curl/curl.h>
#include <stdio.h>
#include <stdbool.h>

struct l2_user_paths {
  const char *config;
  const char *data;
};

struct tag_l2_state_t {
  struct l2_user_paths paths;

  /* eventually instances and other stuff will be stored in a hash table or something,
   * but for now a doubly-linked list accomplishes our goals */
  struct l2_instance *instance_head;
  struct l2_instance *instance_tail;

  struct l2_version_remote *ver_latest, *ver_snapshot;
  struct l2_version_remote *ver_remote_head;
  struct l2_version_remote *ver_remote_tail;

  struct l2_user *users_head, *users_tail;
};

extern struct tag_l2_state_t l2_state;

/* homecooked string methods */
char *l2_launcher_strapp(char *target, const char *src);
bool l2_launcher_strpre(const char *pre, const char *text);

char *l2_launcher_sprintf_alloc(const char *fmt, ...) L2_FORMAT(printf, 1, 2);
char *l2_launcher_sprintf_resize(char **buf, size_t *len, const char *fmt, ...) L2_FORMAT(printf, 3, 4);

/* launcher utilities */
char *l2_launcher_find_config_path(void);
char *l2_launcher_find_data_path(void);

int l2_launcher_open_config(const char *path, int flags, mode_t mode);

int l2_launcher_mkdir_parents(const char *path);
int l2_launcher_mkdir_parents_ex(const char *path, unsigned ignore);
int l2_launcher_rm_tree(const char *path, int nfds);

struct l2_ftw_data {
  int depth;
  int reloffset;
  int baseoffset;
  void *user;
};

enum {
  L2_FTW_FILE = 0,
  L2_FTW_DIR = 1,
  L2_FTW_SYMLINK = 2,
  L2_FTW_TYPEMASK = 3,
  L2_FTW_NONEXIST = 4
};

typedef int (l2_ftw_proc_t)(const char * /*fname*/, const struct stat * /*sb*/, int /*flags*/, struct l2_ftw_data * /*data*/);

int l2_launcher_ftw(const char *path, int depth, l2_ftw_proc_t *proc, void *user);

struct l2_dlbuf {
  void *data;
  size_t size;
  size_t capacity;
};

void l2_launcher_download_init(struct l2_dlbuf *buf);
void *l2_launcher_download_finalize(struct l2_dlbuf *buf, size_t *psz);
void l2_launcher_download_cleanup(struct l2_dlbuf *buf);
//extern size_t (*const l2_dlcb)(char *, size_t, size_t, void *);
extern const curl_write_callback l2_dlcb;

CURLcode l2_launcher_download(CURL *cd, const char *url, void **odata, size_t *osize);

int l2_launcher_should_download(const char *path, const l2_sha1_digest_t *expectdigest, size_t expectsize);
int l2_launcher_check_integrity(FILE *fp, const l2_sha1_digest_t *digest, size_t sz);
int l2_launcher_download_checksummed(const char *url, const char *pathstr, l2_sha1_digest_t *expect_digest, size_t expect_size);

int l2_json_merge_objects(json_t *j1, json_t *j2);

/* string substitute utility */
typedef struct l2_subst l2_subst_t;

int l2_subst_init(l2_subst_t **sp);
int l2_subst_add(l2_subst_t *sp, const char *name, const char *value);
int l2_subst_apply(l2_subst_t *sp, const char *in, char **out);
void l2_subst_free(l2_subst_t *sp);

/* parses an RFC3339 time string */
int l2_parse_time(const char *timestr, time_t *ocaltime);

#endif /* include guard */