#ifndef _SPHO_TP_H
#define _SPHO_TP_H

/* base defs */

#define SPHO_KONST_S_SZ		128
#define SPHO_KONST_K_TRUE	0x43445 /* don't change!!!!! */
#define SPHO_KONST_K_FALSE	0x66a57 /* don't change!1! */

struct spho_konst {
	const char	*s;
	int		k;
};

const struct spho_konst SPHO_K_TRUE_V = { "True", SPHO_KONST_K_TRUE };
const struct spho_konst SPHO_K_FALSE_V = { "False", SPHO_KONST_K_FALSE };

#define SPHO_K_TRUE	(&SPHO_K_TRUE_V)
#define SPHO_K_FALSE	(&SPHO_K_FALSE_V)


struct spho_var {
	struct spho_nom		nom;

	STAILQ_ENTRY(spho_var)	next;
};

STAILQ_HEAD(spho_var_l, spho_var);

struct spho_bind {
	struct spho_nom		nom;
	struct spho_tpop	*op;
};

struct spho_tpop {
	struct spho_var_l	params;
	struct spho_tp		*def;
};

struct spho_rec {
	struct spho_nom		mnom;
	struct spho_tp		*tp;
};

/* type data */
struct tp_bin_data {
	struct spho_tp		*left;
	struct spho_tp		*right;
};

struct tp_box_data {
	struct spho_tp *inr;
};

struct tp_forall_data {
	struct spho_var		*var;
	struct spho_tp		*inr;
};

struct tp_bappl_data {
	struct spho_bind	*bind;
	struct spho_tp_l	*args;
};

struct tp_konst_data {
	const struct spho_konst	*k;
};

struct tp_var_data {
	struct spho_var		*v;
};

struct tp_nominal_data {
	struct spho_nom		*n;
};

struct tp_record_data {
	struct spho_rec		*r;
};

/* type data union */
union tp_data {
	struct tp_bin_data	binop;
	struct tp_box_data	box;
	struct tp_forall_data	fa;
	struct tp_bappl_data	bappl;
	struct tp_konst_data	konst;
	struct tp_var_data	var;
	struct tp_nominal_data	nom;
	struct tp_record_data	rec;
};

#define SPHO_TP_FORM_UNKNOWN	0x00

#define SPHO_TP_FORM_DISJ	0x10
#define SPHO_TP_FORM_CONJ	0x11
#define SPHO_TP_FORM_IMPL	0x12
#define SPHO_TP_FORM_BOX	0x13
#define SPHO_TP_FORM_ARROW	0x14
#define SPHO_TP_FORM_FORALL	0x15
#define SPHO_TP_FORM_BAPPL	0x16

#define SPHO_TP_FORM_FALSE	0x20
#define SPHO_TP_FORM_TRUE	0x21
#define SPHO_TP_FORM_VAR	0x22
#define SPHO_TP_FORM_NOM	0x23

#define SPHO_TP_FORM_REC	0x23

// #define SPHO_TP_FORM_SUB	0x96

#define SPHO_TP_FORM_IS_VALID(f) \
	(f) >= SPHO_TP_FORM_DISJ && (f) <= SPHO_TP_FORM_BAPPL || \
	(f) >= SPHO_TP_FORM_FALSE && (f) <= SPHO_TP_FORM_NOM  || \
	(f) == SPHO_TP_FORM_REC

/* sappho type */
struct spho_tp {
	struct spho_scope	*sc;

	int			form;
	union tp_data		data;

	STAILQ_ENTRY(spho_tp)	next;
};

STAILQ_HEAD(spho_tp_l, spho_tp);

#define SPHO_TP_ERR(tp, err)	SPHO_ERR((tp)->sc->ctx, (err))

struct spho_var	*spho_var_create(struct spho_scope *, char *, size_t);
struct spho_var	*spho_var_get(struct spho_scope *, char *, size_t);

//struct spho_tp	*spho_tp_create_disj(struct spho_scope *, struct spho_tp *,
//		    struct spho_tp *, struct spho_tp *);
//struct spho_tp	*spho_tp_create_conj(struct spho_scope *, struct spho_tp *,
//		    struct spho_tp *, struct spho_tp *);
//struct spho_tp	*spho_tp_create_impl(struct spho_scope *, struct spho_tp *,
//		    struct spho_tp *, struct spho_tp *);
//struct spho_tp	*spho_tp_create_box(struct spho_scope *, struct spho_tp *,
//		    struct spho_tp *);
//struct spho_tp	*spho_tp_create_arrow(struct spho_scope *, struct spho_tp *,
//		    struct spho_tp *);
//struct spho_tp	*spho_tp_create_forall(struct spho_scope *, struct spho_name *,
//		    struct spho_tp *);
//struct spho_tp	*spho_tp_create_const(struct spho_scope *, struct spho_const *);
//struct spho_tp	*spho_tp_create_nominal(struct spho_scope *,
//		    struct spho_nom *);
//struct spho_tp	*spho_tp_create_var(struct spho_scope *, struct spho_var *);
//struct spho_tp	*spho_tp_create_record(struct spho_scope *, struct spho_rec *);
//struct spho_tp	*spho_tp_create_sub(struct spho_scope *, struct spho_tp *,
//		    struct spho_tp *);

void	spho_tp_destroy(struct spho_tp*);

void	spho_tp_free(struct spho_tp *);


#endif