#ifndef UNDAR_PARSER_H
#define UNDAR_PARSER_H

#include "common.h"
#include "lexer.h"
#include "emit.h"

typedef struct scope_s Scope;
typedef struct parser_s Parser;
typedef struct parse_rule_s ParseRule;

struct scope_s {
    Scope *parent; /* pointer to this scopes parent to "bubble up"*/
    List *symbols; /* list of symbols that live in this scope */
};

typedef enum {
  PREC_NONE,
  PREC_ASSIGNMENT,  /* =         */
  PREC_OR,          /* or        */
  PREC_AND,         /* and       */
  PREC_EQUALITY,    /* == !=     */
  PREC_COMPARISON,  /* < > <= >= */
  PREC_TERM,        /* + -       */
  PREC_FACTOR,      /* * /       */
  PREC_UNARY,       /* ! -       */
  PREC_CALL,        /* . ()      */
  PREC_PRIMARY
} Precedence;

typedef void (*ParseFn)();

struct parse_rule_s {
  ParseFn prefix;
  ParseFn infix;
  Precedence precedence;
};

struct parser_s {
	Scope *current_scope; 
	Token current;
	Token previous;
};

bool compile(Arena *a, Emitter e, char *source);

#endif