#ifndef XPCG_TOKEN_H_
#define XPCG_TOKEN_H_

#include "file-span.h"

#include <blue/core/queue.h>

#define TOKEN_TYPE(tok)     ((tok) ? (tok)->tok_type : TOK_NONE)
#define TOKEN_IS(tok, type) ((tok) && ((tok)->tok_type & (type)) != 0)
#define TOKEN_IS_SYMBOL(tok, sym)                                              \
	((tok) && (tok)->tok_type == TOK_SYMBOL && (tok)->tok_sym == (sym))

enum token_type {
	TOK_NONE = 0,
	TOK_SYMBOL = 0x0001u,
	TOK_KEYWORD = 0x0002u,
	TOK_WORD = 0x0004u,
	TOK_NAME = 0x0008u,
	TOK_INT = 0x0010u,
	TOK_STRING = 0x0020u,
	__TOK_UBOUND = 0x0040u,
};

enum token_value_type {
	TOK_V_NONE = 0,
	TOK_V_INT,
	TOK_V_STRING,
	TOK_V_SYMBOL,
	TOK_V_KEYWORD,
};

enum token_symbol {
	SYM_NONE = 0,
	SYM_COMMA = __TOK_UBOUND,
	SYM_HYPHEN,
	SYM_SEMICOLON,
	SYM_COLON,
	SYM_LEFT_BRACKET,
	SYM_RIGHT_BRACKET,
	SYM_LEFT_BRACE,
	SYM_RIGHT_BRACE,
	SYM_LEFT_PAREN,
	SYM_RIGHT_PAREN,
	SYM_HYPHEN_RIGHT_ANGLE,
	__SYM_UBOUND,
};

enum token_keyword {
	KW_NONE = 0,
	KW_INTERFACE = __SYM_UBOUND,
	KW_FUNC,
};

struct token {
	struct file_span tok_location;
	enum token_type tok_type;
	enum token_value_type tok_value_type;
	b_queue_entry tok_entry;

	union {
		char *tok_str;
		enum token_symbol tok_sym;
		enum token_keyword tok_kw;
		long long tok_int;
	};
};

extern void token_destroy(struct token *tok);
extern const char *token_type_to_string(enum token_type type);
extern const char *token_symbol_to_string(enum token_symbol sym);
extern const char *token_keyword_to_string(enum token_keyword kw);

#endif