#ifndef CARROT_DEFINITION_GENERATOR_H
#define CARROT_DEFINITION_GENERATOR_H

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <tokenizer.h>

typedef struct      carrot_definition           carrot_definition_s;
typedef struct      carrot_rule                 carrot_rule_s;
typedef struct      carrot_compound             carrot_compound_s;
typedef struct      carrot_element              carrot_element_s;
typedef struct      carrot_end_node             carrot_end_node_s;

struct carrot_definition
{
    uint32_t                        num_rules;
    carrot_rule_s                  *rules;
};

struct carrot_rule
{
    uint32_t                        len_name;
    char                           *name;
    
    uint32_t                        num_elements;
    carrot_element_s               *elements;
};

struct carrot_compound
{
    carrot_rule_s                  *up;
    
    uint32_t                        num_rules;
    carrot_rule_s                  *rules;
};

typedef enum
{
    CARROT_ELEMENT_RULE_INSERTION,
    CARROT_ELEMENT_PATTERN,
    CARROT_ELEMENT_RAW_LITERAL
    
} carrot_element_e;

typedef enum
{
    CARROT_PATTERN_INVALID,
    CARROT_PATTERN_WORD,                        // Keyword: "|word|"
    CARROT_PATTERN_KEYWORD,                     // Keyword: "|keyword|" (belonging to a list of user-defined keywords
    CARROT_PATTERN_NUMBER                       // Keyword: "|number|"

} carrot_pattern_e;

struct carrot_element
{
    // char                           *text;
    
    carrot_element_e                type;
    union carrot_specific_literal
    {
        struct carrot_tag_name
        {
            uint32_t                        len_name;
            char                           *name;
            
        } nonterminal;
        
        struct carrot_pattern
        {
            carrot_pattern_e                value;
            
        } pattern;
        
        struct carrot_raw_literal
        {
            uint32_t                        num_bytes;
            char                           *bytes;
        } raw_literal;
        
    } specific;
};

carrot_definition_s             carrot_parse_definition         (carrot_token_stream_s *stream);

#endif // CARROT_DEFINITION_GENERATOR_H