#ifndef _FN_H
#define _FN_H

#include <bits/types/time_t.h>  // for time_t
#include <termios.h>            // for termios

#define FN_VERSION "0.2"
#define FN_TAB_STOP 4

#define CTRL_KEY(k) ((k) & 0x1f)

enum editorKey {
  BACKSPACE = 127,
  ARROW_LEFT = 1000,
  ARROW_RIGHT,
  ARROW_UP,
  ARROW_DOWN,
  DEL_KEY,
  HOME_KEY,
  END_KEY,
  PAGE_UP,
  PAGE_DOWN
};

enum editorHighlight {
  HL_NORMAL = 0,
  HL_COMMENT,
  HL_MLCOMMENT,
  HL_KEYWORD1,
  HL_KEYWORD2,
  HL_STRING,
  HL_NUMBER,
  HL_MATCH
};

#define HL_HIGHLIGHT_NUMBERS (1<<0)
#define HL_HIGHLIGHT_STRINGS (1<<1)

struct editorSyntax {
  char *filetype;
  char **filematch;
  char **keywords;
  char *singleline_comment_start;
  char *multiline_comment_start;
  char *multiline_comment_end;
  int flags;
};

typedef struct erow {
  int idx;
  int size;
  int rsize;
  char *chars;
  char *render;
  unsigned char *hl;
  int hl_open_comment;
} erow;

struct editorConfig {
  int cx, cy;
  int rx; // The x position in the rendered line (for tabs)
  int rowoff;
  int coloff;
  int screenrows;
  int screencols;
  int numrows;
  erow *row;
  int dirty;
  char *filename;
  char statusmsg[80];
  time_t statusmsg_time;
  struct editorSyntax *syntax;
  struct termios orig_termios;
};

struct editorConfig E;

struct abuf {
  char *b;
  int len;
};


void windowResizeCallback(int signum);
void initEditor();
void exitEditor();
  
void editorSetStatusMessage(const char *fmt, ...);
void editorRefreshScreen();
char *editorPrompt(char *prompt, void (*callback)(char *, int));

#endif