#include "typeutils.h"


typedef struct Region Region;


typedef enum {
    UN_Q,
    SINGLE_Q,
    DOUBLE_Q,
} QuotationMode;


typedef enum {
    LITERAL,
    CMD_SUB,
    ARITHM,
    VAR_EXP,    // TODO: Later include other exps
} ChunkKind;


typedef struct {
    ChunkKind kind;
    QuotationMode mode;

    union {
        char* lit_str;
        Region* sub_cmd_region;
        Region* arithm_expr_region;
        char* param_string;
    } as;
} Chunk;


DECLARE_VEC(Chunk, ChunkVec)

typedef enum {
    TOK_WORD,
    TOK_SPECIAL,
} TokenKind;

typedef enum {
    PIPE,
    WRITE_REDIR_TRUNC,
    WRITE_REDIR_APPEND,
    READ_REDIR,
    EOL,
} SpecialToken;

typedef struct {
    TokenKind kind;

    union {
        ChunkVec word;
        SpecialToken spec; 
    } as;
} Token;
    

DECLARE_VEC(Token, TokenVec)

DECLARE_MAYBE(SpecialToken)  


struct Region {
    QuotationMode mode;
    TokenVec tokens; 
};

DECLARE_MAYBE(Chunk);

DECLARE_VEC(Region, RegionVec)