#ifndef _MSPH_TREE_H
#define _MSPH_TREE_H

#include <sys/queue.h>

#include "msph/common.h"
#include "msph/token.h"

/*
 * TYPES:
 * Conj
 * Disj
 * Impl
 * Arrow
 * Box
 * (Sub)
 * Forall
 *
 * True
 * False
 * Var
 * Nominal
 *
 * Record
 *
 * DEFINITIONS/DIRECTIVES:
 * Type definition             (type A[X..] = T)
 * Nominal definition          (nominal N)
 * Member definition           (member mname : T)
 *
 * {
 * member a: A
 * member b: B
 * }
 *
 * Subtyping assert             (assert A <: B, asserts that A <: B)
 *
 * EXTRA DEFINITIONS
 * Class definition            (class C[...] { ... }, shorthand)
 *
 * EXPRESSIONS
 * Conj
 * Disj
 * Impl
 * Arrow
 * Box
 * (Sub)
 * Forall
 *
 * True
 * False
 * Var
 * Nominal
 *
 * Trait                       ({ ... }, creates scoping)
 */

#define MSPH_TREE_ROOT		0x0000
#define MSPH_TREE_UNIT		0x0001

#define MSPH_TREE_BODY		0x0010

#define MSPH_TREE_DIR		0x0020
#define MSPH_TREE_TPDEF		0x0021
#define MSPH_TREE_NOMINDECL	0x0022
#define MSPH_TREE_MEMBDECL	0x0023
#define MSPH_TREE_ASSERT	0x0024

#define MSPH_TREE_TPEXPR	0x0040
#define MSPH_TREE_TRUE		0x0041
#define MSPH_TREE_FALSE		0x0042
#define MSPH_TREE_NAME		0x0043
#define MSPH_TREE_APPL		0x0044
#define MSPH_TREE_TRAIT		0x0045
#define MSPH_TREE_CONJ		0x0046
#define MSPH_TREE_DISJ		0x0047
#define MSPH_TREE_IMPL		0x0048
#define MSPH_TREE_ARROW		0x0049
#define MSPH_TREE_BOX		0x004a
#define MSPH_TREE_FORALL	0x004b
#define MSPH_TREE_PAREN		0x004c

#define MSPH_TREE_IDENT		0x0100


struct msph_tree {
	int			type;
	struct msph_tree	*parent;
};

struct msph_tree_root;
struct msph_tree_text;
struct msph_tree_body;
struct msph_tree_dir;
struct msph_tree_tpdef;
struct msph_tree_nomindecl;
struct msph_tree_assert;
struct msph_tree_ident;
struct msph_tree_tpexpr;

struct msph_tree_root {
	struct msph_tree	tr;

	struct msph_ctx		*ctx;

	STAILQ_HEAD(msph_tree_unit_l, msph_tree_unit)	head;
};

struct msph_tree_unit {
	struct msph_tree	tr;

	char			name[MSPH_NAME_LEN];
	struct msph_tree_body	*body;
	STAILQ_ENTRY(msph_tree_unit)	entries;
};

struct msph_tree_text {
	struct msph_tree	tr;
	struct msph_text_pos	pos;
};

struct msph_tree_body {
	struct msph_tree		tr;

	STAILQ_HEAD(msph_tree_dir_l, msph_tree_dir)	head;
};

struct msph_tree_dir {
	struct msph_tree		tr;

	STAILQ_ENTRY(msph_tree_dir)	entries;
};

struct msph_tree_tpdef {
	struct msph_tree_dir		dir;

	struct msph_tree_ident		*id;
	struct msph_tree_tpexpr		*tp;
};

struct msph_tree_nomindecl {
	struct msph_tree_dir	dir;

	struct msph_tree_ident	*id;
};

struct msph_tree_membdecl {
	struct msph_tree_dir	dir;

	struct msph_tree_ident	*id;
	struct msph_tree_tpexpr	*tp;
};

struct msph_tree_assert {
	struct msph_tree_dir	dir;

	struct msph_tree_tpexpr	*ltp;
	struct msph_tree_tpexpr	*rtp;
};

struct msph_tree_tpexpr {
	struct msph_tree		tr;

	STAILQ_ENTRY(msph_tree_tpexpr)	entries;
};


struct msph_tree_true {
	struct msph_tree_tpexpr	tp;
};

struct msph_tree_false {
	struct msph_tree_tpexpr	tp;
};

struct msph_tree_name {
	struct msph_tree_tpexpr	tp;

	struct msph_tree_ident	*id;
};

struct msph_tree_appl {
	struct msph_tree_tpexpr	tp;

	struct msph_tree_ident	*id;
	STAILQ_HEAD(msph_tree_tpexpr_l, msph_tree_tpexpr) head;
};

struct msph_tree_trait {
	struct msph_tree_tpexpr	tp;

	struct msph_tree_body	*body;
};

struct msph_tree_conj {
	struct msph_tree_tpexpr	tp;

	struct msph_tree_tpexpr	*ltp;
	struct msph_tree_tpexpr	*rtp;
};

struct msph_tree_disj {
	struct msph_tree_tpexpr	tp;

	struct msph_tree_tpexpr	*ltp;
	struct msph_tree_tpexpr	*rtp;
};

struct msph_tree_impl {
	struct msph_tree_tpexpr	tp;

	struct msph_tree_tpexpr	*ltp;
	struct msph_tree_tpexpr	*rtp;
};

struct msph_tree_arrow {
	struct msph_tree_tpexpr	tp;

	struct msph_tree_tpexpr	*ltp;
	struct msph_tree_tpexpr	*rtp;
};

struct msph_tree_box {
	struct msph_tree_tpexpr	tp;

	struct msph_tree_tpexpr	*inner;
};

struct msph_tree_forall {
	struct msph_tree_tpexpr	tp;

	struct msph_tree_ident	*ident;
	struct msph_tree_tpexpr	*inner;
};

struct msph_tree_paren {
	struct msph_tree_tpexpr	tp;

	struct msph_tree_tpexpr	*inner;
};

struct msph_tree_ident {
	struct msph_tree tr;

	char str[MSPH_IDENT_LEN];
	STAILQ_ENTRY(msph_tree_ident) entries;
};



struct msph_tree_root	*msph_tree_makeroot(struct msph_ctx *);

int	msph_tree_parse(struct msph_token_stream *, struct msph_tree_root *);

ssize_t	msph_tree_fprint(FILE *, struct msph_tree *);

#endif