#ifndef TOKEN_H
#define TOKEN_H

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>

#define TOKENTYPE_MAPPINGS_COUNT 34

typedef enum {
    //Single-character tokens
    LParen, RParen,
    LBrace, RBrace,
    Comma,
    Dot,
    Minus, Plus,
    Semicolon,
    Slash, Star,
    //One or two character tokens
    Bang, Bang_Equal,
    Equal, Equal_Equal,
    Greater, Greater_Equal,
    Less, Less_Equal,
    //Literals
    Identifier,
    String,
    Number,
    //Keywords
    AND, CLASS, ELSE, FALSE, FUN,
    FOR, IF, NIL, OR, PRINT, RETURN,
    SUPER, THIS, TRUE, VAR, WHILE,

    EndOF
} TokenType;

typedef struct {
    const char* lexeme;
    TokenType type;
} KeyValuePair;

typedef struct {
    TokenType type;
    const char* lexeme;
    int line;
    int length;
} Token;

extern KeyValuePair TokenTypeMappings[TOKENTYPE_MAPPINGS_COUNT];

//If the first parameter is NULL, the token creation will attempt to infer the lexeme from the TokenType.
Token* CreateToken(const char*, int, TokenType);

#endif