;;       
;; 
;; An extension for generating Python code describing the parameters of NEMO models.
;;
;; Copyright 2008-2013 Ivan Raikov and the Okinawa Institute of Science and Technology
;;
;; This program is free software: you can redistribute it and/or
;; modify it under the terms of the GNU General Public License as
;; published by the Free Software Foundation, either version 3 of the
;; License, or (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;; General Public License for more details.
;;
;; A full copy of the GPL license can be found at
;; <http://www.gnu.org/licenses/>.
;;

(module nemo-pyparams

	(nemo:pyparams-translator)

	(import scheme chicken utils data-structures lolevel ports srfi-1 srfi-13 srfi-69)
	
	(require-extension lolevel matchable strictly-pretty 
			   varsubst datatype nemo-core nemo-utils
			   nemo-gate-complex nemo-defaults nemo-geometry)



(define (safe-car x)
  (and x (car x)))

(define (safe-cadr x)
  (and x (cadr x)))

(define (member-imports x imports)
  (safe-car (member x imports (lambda (x y) (equal? x (cadr y))))))


(define python-builtin-consts
  `())

(define python-ops
  `(+ - * / > < <= >= = ^))

(define builtin-fns
  `(+ - * / pow neg abs atan asin acos sin cos exp ln
      sqrt tan cosh sinh tanh hypot gamma lgamma log10 log2 log1p ldexp cube
      > < <= >= = and or round ceiling floor max min
      ))

(define (python-name s)
  (let ((cs (string->list (->string s))))
    (let loop ((lst (list)) (cs cs))
      (if (null? cs) (string->symbol (list->string (reverse lst)))
	  (let* ((c (car cs))
		 (c1 (cond ((or (char-alphabetic? c) (char-numeric? c) (char=? c #\_)) c)
			   (else #\_))))
	    (loop (cons c1 lst) (cdr cs)))))))
	    



(define (rhsexpr/python expr)
  (match expr 
	 (('if . es)  `(if . ,(map (lambda (x) (rhsexpr/python x)) es)))
	 (('pow x y)  (if (and (integer? y)  (positive? y))
			  (if (> y 1)  (let ((tmp (gensym "x")))
					 `(let ((,tmp ,x)) (* . ,(list-tabulate (inexact->exact y) (lambda (i) tmp)))))
			      x)
			    expr))
	 ((s . es)    (if (symbol? s)  (cons (if (member s builtin-fns) s (python-name s)) (map (lambda (x) (rhsexpr/python x)) es)) expr))
	 (id          (if (symbol? id) (python-name id) id))))


(define (python-state-name n s)
  (python-name (s+ n s)))


(define-syntax pp
  (syntax-rules ()
    ((pp indent val ...) (ppf indent (quasiquote val) ...))))


(define tuple/python   (doc:block 2 (doc:text "(") (doc:text ")")))
(define dict/python    (doc:block 2 (doc:text "{") (doc:text "}")))
(define group/python   (doc:block 2 (doc:text "(") (doc:text ")")))
(define block/python   (doc:block 2 (doc:empty) (doc:empty)))

(define (stmt/python x) 
  (match x
	 (($ doc 'DocCons _ ($ doc 'DocText "")) x)
	 (else  (doc:cons x (doc:text "")))))


(define (ifthen/python c e1 e2)
  (doc:nest 
   2 (doc:connect
      (doc:connect (doc:group (doc:connect (doc:text "if") c))
		   (doc:connect (doc:nest 2 e1)
				(doc:nest 2 (doc:connect (doc:text "else") e2))))
      (doc:text "end"))))

(define (letblk/python e1 e2)
  (cond ((equal? e1 (doc:empty)) (doc:group (doc:nest 2 e2)))
	((equal? e2 (doc:empty)) (doc:group (doc:nest 2 e1)))
	(else (doc:connect (doc:group (doc:nest 2 (stmt/python e1)))
			   (doc:group (doc:nest 2 e2))))))
	

(define (format-op/python indent op args)
  (let ((op1 (doc:text (->string op))))
    (if (null? args) op1
	(match args
	       ((x)      (doc:concat (list op1 x)))
	       ((x y)    (doc:concat (intersperse (list x op1 y) (doc:space))))
	       ((x y z)  (doc:concat (intersperse (list x op1 y op1 z) (doc:space))))
	       (lst      (let* ((n   (length lst))
				(n/2 (inexact->exact (round (/ n 2)))))
			   (doc:concat 
			    (intersperse 
			     (list (format-op/python indent op (take lst n/2 )) op1 
				   (format-op/python indent op (drop lst n/2 )))
			     (doc:space)))))))))


(define (format-fncall/python indent op args)
  (let ((op1 (doc:text (->string op))))
    (doc:cons op1 (group/python ((doc:list indent identity (lambda () (doc:text ", "))) args)))))


(define (format-dict/python indent args)
  (dict/python ((doc:list indent 
			  (lambda (x) 
			    (let ((k (car x)) (v (cdr x)))
			      (doc:cons (doc:text k) 
					(doc:cons (doc:text ": ") 
						  (doc:cons (doc:text v) 
							    (doc:empty))))))
			  (lambda () (doc:cons (doc:text ", ") 
					       (doc:cons (doc:break) 
							 (doc:empty)))))
		args)))

(define (format-tuple/python indent args)
  (tuple/python ((doc:list indent 
			  (lambda (v) (doc:text v))
			  (lambda () (doc:cons (doc:text ", ") 
					       (doc:cons (doc:break) 
							 (doc:empty)))))
		args)))


(define (name-normalize expr)
  (match expr 
	 (('if c t e)  `(if ,(name-normalize c) ,(name-normalize t) ,(name-normalize e)))
	 (('let bs e)
	  `(let ,(map (lambda (b) `(,(car b) ,(name-normalize (cadr b)))) bs) ,(name-normalize e)))
	 ((f . es) 
	  (cons f (map name-normalize es)))
	 ((? symbol? ) (python-name expr))
	 ((? atom? ) expr)))


(define (canonicalize-expr/python expr)
  (let ((subst-convert  (subst-driver (lambda (x) (and (symbol? x) x)) nemo:binding? identity nemo:bind nemo:subst-term)))
    (let* ((expr1 (if-convert expr))
	   (expr2 (subst-convert expr1 subst-empty))
	   (expr3 (let-lift expr2))
	   (expr4 (name-normalize expr3)))
      expr4)))


(define (format-expr/python indent expr . rest)  
  (let-optionals rest ((rv #f))
   (let ((indent+ (+ 2 indent)))
    (match expr
       (('let bindings body)
	(letblk/python
	 (fold-right 
	   (lambda (x ax)
	     (letblk/python
	      (match (second x)
		     (('if c t e)
		      (ifthen/python
		       (group/python (format-expr/python indent c))
		       (block/python (format-expr/python indent t (first x)))
		       (block/python (format-expr/python indent e (first x)))))
		     (else 
		      (stmt/python
		       (format-op/python indent+ " = "
					 (list (format-expr/python indent (first x) )
					       (format-expr/python indent (second x)))))))
	      ax))
	   (doc:empty) bindings)
	 (match body
		(('let _ _) (format-expr/python indent body rv))
		(else
		 (let ((body1 (doc:nest indent (format-expr/python indent body))))
		   (if rv (stmt/python (format-op/python indent " = " (list (format-expr/python indent+ rv ) body1)))
		       body1))))))
       
       (('if . rest) (error 'format-expr/python "invalid if statement " expr))

       ((op . rest)  
       (let ((op (case op ((pow)  '^)  ((ln) 'log) (else op))))
	 (let ((fe
		(if (member op python-ops)
		    (let ((mdiv?  (any (lambda (x) (match x (('* . _) #t) (('/ . _) #t) (else #f))) rest))
			  (mul?   (any (lambda (x) (match x (('* . _) #t) (else #f))) rest))
			  (plmin? (any (lambda (x) (match x (('+ . _) #t) (('- . _) #t) (else #f))) rest)))
		      (case op
			((/)  
			 (format-op/python indent op 
					  (map (lambda (x) 
						 (let ((fx (format-expr/python indent+ x)))
						   (if (or (symbol? x) (number? x)) fx
						       (if (or mul? plmin?) (group/python fx) fx)))) rest)))
			((*)  
			 (format-op/python indent op 
					  (map (lambda (x) 
						 (let ((fx (format-expr/python indent+ x)))
						   (if (or (symbol? x) (number? x)) fx
						       (if plmin? (group/python fx) fx)))) rest)))
			
			((^)  
			 (format-op/python indent op 
					  (map (lambda (x) 
						 (let ((fx (format-expr/python indent+ x)))
						   (if (or (symbol? x)  (number? x)) fx
						       (if (or mdiv? plmin?) (group/python fx) fx)))) rest)))
			
			(else
			 (format-op/python indent op 
					  (map (lambda (x) 
						 (let ((fx (format-expr/python indent+ x))) fx)) rest)))))
		    
		    (let ((op (case op ((neg) '-) (else op))))
		      (format-fncall/python indent op (map (lambda (x) (format-expr/python indent+ x)) rest))))))
	   (if rv 
	       (stmt/python (format-op/python indent " = " (list (format-expr/python indent+ rv ) fe)))
	       fe))))
      
      (else  (let ((fe (doc:text (->string expr))))
	       (if rv 
		   (stmt/python (format-op/python indent " = " (list (format-expr/python indent+ rv ) fe)))
		   fe)))))))

(define (doc->string x . rest)
  (let-optionals rest ((width 72))
   (sdoc->string (doc:format width x))))
	  
(define (expr->string/python x . rest)
  (let-optionals rest ((rv #f) (width 72))
     (doc->string
      (format-expr/python 2 x rv)
      width)))


(define (state-init n init)
  (let* ((init  (rhsexpr/python init))
	 (init1 (canonicalize-expr/python init)))
    (list (python-name n) init1)))


  
(define (make-define-fn)
  (lambda (indent n proc)
    (let ((lst (procedure-data proc))
	  (indent+ (+ 2 indent)))
      (let ((retval   (python-name (gensym "retval")))
	    (rt       (lookup-def 'rt lst))
	    (formals  (lookup-def 'formals lst))
	    (vars     (lookup-def 'vars lst))
	    (body     (lookup-def 'body lst)))
	(pp indent ,nl (function ,retval = ,(python-name n) (,(slp ", " vars)) ))
	(let* ((body0 (rhsexpr/python body))
	       (body1 (canonicalize-expr/python body0))
	       (lbs   (enum-bnds body1 (list))))
	  (pp indent+ ,(expr->string/python body1 retval))
	  (pp indent end))
	  ))))




(define (output-pyparams sysname mode i-params i-eqs
			 const-defs asgn-eq-defs init-eq-defs 
			 pool-ions perm-ions mcap defaults geometry
                         indent indent+)

  (define (pystring s) (s+ "'" s "'"))
 
    
    (let* ((init-eqs 
	    (append 
	     
	     const-defs
	     asgn-eq-defs
	     init-eq-defs
	     
             (map (lambda (pool-ion)
                    (let ((n (pool-ion-in pool-ion))
                          (b (pool-ion-inq pool-ion)))
                      (list n b)))
                  pool-ions)))

	   (init-dag 
	    (map (lambda (def)
		   (cons (first def) (enum-freevars (second def) '() '())))
		 init-eqs))

	   (init-order
	    (reverse
	     (topological-sort init-dag 
	       (lambda (x y) (string=? (->string x) (->string y))))))

           (soma-geometry (lookup-def 'soma geometry))
           )

      (for-each (lambda (x)
		  (pp indent ,(expr->string/python (cadr x) (python-name (car x)))))
		const-defs)

      (pp indent ,nl)

      (let recur ((i-params i-params) 
		  (property-tuples '() ))

	(if (null? i-params)
	    
            (let ((property-tuples1
                   (append
                    (map (match-lambda ((x v) (list (list "Extracellular" x) (pystring (python-name x)) (->string (rhsexpr/python v))))) defaults)
                    (or (and mcap
                             (let ((cm (->string (python-name mcap))))
                               `((("Membrane" "cm") ,(pystring cm) ,cm))))
                        '())
                    (or (and soma-geometry
                             (let ((L (->string (python-name (second (first soma-geometry)))))
                                   (diam (->string (python-name (second (second soma-geometry))))))
                             `((("Geometry" "diam") ,(pystring L) ,L)
                               (("Geometry" "L") ,(pystring diam) ,diam))))
                        '())
                    property-tuples))
                  )
              (pp indent (,(doc->string 
			  (format-op/python 
			   indent " = "
			   (list (format-expr/python indent "properties" )
				 (format-dict/python 
				  indent
				  (map (lambda (t)
                                         (let ((k (if (string? (car t))
                                                      (pystring (car t))
                                                      (s+ "(" (slp ", " (map (lambda (x) (pystring x)) (car t))) ")") ))
                                               )
                                           `(,k . ,(doc->string (format-tuple/python indent+ (cdr t))))
                                           ))
				       property-tuples1)
				  ))
			   ))
			))
              )

	    (let ((paramset (car i-params)))
	      (let ((alst (cdr paramset)))
		(let ((label (lookup-def 'label alst))
		      (maximal-permeability (lookup-def 'maximal-permeability alst))
		      (maximal-conductance  (lookup-def 'maximal-conductance alst))
		      (reversal-potential   (lookup-def 'reversal-potential alst)))
		  (recur (cdr i-params)
			 (let* ((property-tuples1 
				 (fold (lambda (l x ax)
					 (or (and x (cons `(,l ,(s+ "'" (python-name x) "'")
							       ,(symbol->string (python-name x)) 
							       ) 
							  ax))
					     ax))
				       property-tuples
                                       (list (list label "pbar")
                                             (list label "gbar")
                                             (list label "e_rev"))
				       (list maximal-permeability
					     maximal-conductance 
					     reversal-potential)
				       ))
                                )
			   property-tuples1))
		  )))
	    ))

    ))

(define (pyparams-translator1 sys . rest)
  (define (cid x)  (second x))
  (define (cn x)   (first x))
  (let-optionals rest ((mode 'multiple) (filename #f))
  (match-let ((($ nemo:quantity 'DISPATCH  dis) (hash-table-ref sys (nemo-intern 'dispatch))))
    (let ((imports  ((dis 'imports)  sys))
	  (exports  ((dis 'exports)  sys)))
      (let* ((indent      0)
	     (indent+     (+ 2 indent ))
	     (sysname     (python-name ((dis 'sysname) sys)))
	     (prefix      sysname)
	     (filename    (or filename (s+ sysname ".py")))
	     (deps*       ((dis 'depgraph*) sys))
	     (consts      ((dis 'consts)  sys))
	     (asgns       ((dis 'asgns)   sys))
	     (states      ((dis 'states)  sys))
	     (reactions   ((dis 'reactions) sys))
	     (defuns      ((dis 'defuns)  sys))
	     (components  ((dis 'components) sys))
	     
	     (g             (match-let (((state-list asgn-list g) ((dis 'depgraph*) sys))) g))
	     (poset         (vector->list ((dis 'depgraph->bfs-dist-poset) g)))

	     (const-defs       (filter-map
				(lambda (nv)
				  (and (not (member (first nv) python-builtin-consts))
				       (let ((v1 (canonicalize-expr/python (second nv))))
					 (list (python-name (first nv)) v1))))
				consts))
	     
	     (gate-complex-info    (nemo:gate-complex-query sys))
	     (defaults             (nemo:defaults-query sys))
             (geometry             (nemo:geometry-query sys))

	     (gate-complexes       (lookup-def 'gate-complexes gate-complex-info))
	     (perm-ions     (map (match-lambda ((comp i e erev val) `(,comp ,(python-name i) ,(python-name e) ,erev)))
				 (lookup-def 'perm-ions gate-complex-info)))
	     (acc-ions      (map (match-lambda ((comp i in out) `(,comp ,@(map python-name (list i in out)))))
				 (lookup-def 'acc-ions gate-complex-info)))
	     (epools        (lookup-def 'pool-ions gate-complex-info))
	     (pool-ions     (pool-ion-name-map python-name epools))

	     (i-gates       (lookup-def 'i-gates gate-complex-info))

	     (capcomp       (any (match-lambda ((name 'membrane-capacitance id) (list name id)) (else #f)) components))
	     (mcap          (and capcomp (car ((dis 'component-exports) sys (cid capcomp)))))
		
	     (i-eqs+params
	      (filter-map
		     (lambda (gate-complex) 
		       
		       (let* ((label             (first gate-complex))
			      (n                 (second gate-complex))
			      (subcomps          ((dis 'component-subcomps) sys n))
			      (acc               (lookup-def 'accumulating-substance subcomps))
			      (perm              (lookup-def 'permeating-ion subcomps))
			      (permqs            (and perm ((dis 'component-exports) sys (cid perm))))
			      (pore              (lookup-def 'pore subcomps))
			      (permeability      (lookup-def 'permeability subcomps))
			      (gate              (lookup-def 'gate subcomps))
			      (sts               (and gate ((dis 'component-exports) sys (cid gate)))))
			 
			 (if (not (or pore permeability))
			     (nemo:error 'nemo:python-translator ": ion channel definition " label
					 "lacks any pore or permeability components"))


			 (cond ((and perm permeability gate)
                                (let* ((i     (python-name (s+ 'i (cn perm))))
                                       (pmax  (car ((dis 'component-exports) sys (cid permeability))))
                                       (pbar  (cadr ((dis 'component-exports) sys (cid permeability))))
                                       (pwrs  (map (lambda (n) (state-power sys n)) sts))
                                       (sptms (map (lambda (st pwr) `(pow ,st ,pwr)) sts pwrs))
                                       (gion  `(* ,pmax ,@sptms)))
                                  (list i #f gion (python-name (s+ 'i_ label) )
                                        `((label . ,label) 
                                          (maximal-permeability . ,pbar) ))))

			       ((and perm pore gate)
				(case (cn perm)
				  ((non-specific)
				   (let* ((i     (python-name 'i))
					  (e     (car permqs))
					  (gmax  (car ((dis 'component-exports) sys (cid pore))))
					  (pwrs  (map (lambda (n) (state-power sys n)) sts))
					  (sptms (map (lambda (st pwr) `(pow ,st ,pwr)) sts pwrs))
					  (gion  `(* ,gmax ,@sptms))
					  )


				     (list i e gion  (python-name (s+ 'i_ label))
					   `((label . ,label)
					     (maximal-conductance . ,gmax)
					     (reversal-potential . ,e))
					   )))

				  (else
				   (let* ((i     (python-name (s+ 'i (cn perm))))
					  (e     (car permqs))
					  (gmax  (car ((dis 'component-exports) sys (cid pore))))
					  (pwrs  (map (lambda (n) (state-power sys n)) sts))
					  (sptms (map (lambda (st pwr) `(pow ,st ,pwr)) sts pwrs))
					  (gion  `(* ,gmax ,@sptms))
				     
					  ;; this handles a special case when a mechanism is defined as 
					  ;; ohmic (i.e. with reversal potential), but uses ionic 
					  ;; concentrations to compute reversal potential; 
					  ;; in this case, the reversal potential is computed 
					  ;; in the mechanism at each timestep and it is not 
					  ;; a user-settable parameter... 
					  
					  (ion     (cn perm))
					  (concqs  (filter identity
							   (list (safe-cadr (member-imports (string->symbol (s+ ion 'i)) imports))
								 (safe-cadr (member-imports (string->symbol (s+ ion 'o)) imports)))))
					  )

				     (if (null? concqs)
					 (list i e gion (python-name (s+ 'i_ label))
					       `((label . ,label)
						 (maximal-conductance . ,gmax)
						 (reversal-potential . ,e)))
					 (list i e gion (python-name (s+ 'i_ label))
					       `((label . ,label)
						 (maximal-conductance . ,gmax)))
					 ))
				   ))
				)
			       
			       ((and perm pore)
				(case (cn perm)
				  ((non-specific)
				   (let* ((i     (python-name 'i))
					  (e     (car permqs))
					  (gmax  (car ((dis 'component-exports) sys (cid pore)))))
				     (list i e gmax (python-name (s+ 'i_ label))
					   `((label . ,label)
					     (maximal-conductance . ,gmax)
					     (reversal-potential . ,e))
					   )))
				  (else
				   (nemo:error 'nemo:python-translator ": invalid ion channel definition " label))))
			       
			       ((and acc pore gate)
				(let* ((i     (python-name (s+ 'i (cn acc))))
				       (gmax  (car ((dis 'component-exports) sys (cid pore))))
				       (pwrs  (map (lambda (n) (state-power sys n)) sts))
				       (sptms (map (lambda (st pwr) `(pow ,st ,pwr)) sts pwrs))
				       (gion  `(* ,gmax ,@sptms)))
				  (list i #f gion  (python-name (s+ 'i_ label))
					   `((label . ,label)
					     (maximal-conductance . ,gmax)))
					))
			       (else (nemo:error 'nemo:python-translator ": invalid ion channel definition " label))
			       )))
		     gate-complexes))

	     (i-params (map (lambda (i-eq) (cons (car i-eq) (cadr (cdddr i-eq)))) i-eqs+params))
	     (i-eqs    (map (lambda (i-eq) (take i-eq 4)) i-eqs+params))

	     (i-names (delete-duplicates (map first i-eqs)))
		
	     (i-eqs  (fold  (lambda (i-gate ax) 
			      (let ((i-gate-var (first i-gate)))
				(cons (list (python-name 'i) #f i-gate-var (s+ 'i_ (second i-gate))) ax)))
			    i-eqs i-gates))

	     (i-bkts (bucket-partition (lambda (x y) (eq? (car x) (car y))) i-eqs))
	     
	     (i-eqs  (fold (lambda (b ax) 
			     (match b 
				    ((and ps ((i e gion ii) . rst))  
				     (let loop ((ps ps) (summands (list)) (eqs (list)))
				       (if (null? ps)
					   
					   (let* ((sum0  (sum summands))
						  (sum1  (rhsexpr/python sum0))
						  (sum2  (canonicalize-expr/python sum1)))
					     (append eqs (list (list i sum2)) ax))
					   
					   (match-let (((i e gion ii) (car ps)))
						      (loop (cdr ps) 
							    (cons ii summands) 
							    (let* ((expr0 (rhsexpr/python (if e `(* ,gion (- v ,e)) gion)))
								   (expr1 (canonicalize-expr/python expr0)))
							      (cons (list ii expr1) eqs)))))))
				    
				    ((i e gion ii)
				     (let* ((expr0  (rhsexpr/python (if e `(* ,gion (- v ,e)) gion)))
					    (expr1  (canonicalize-expr/python expr0)))
				       (cons (list i expr1) ax)))
				    
				    (else ax)))
			   (list) i-bkts))

	     (asgn-eq-defs       (poset->asgn-eq-defs* poset sys python-name rhsexpr/python canonicalize-expr/python builtin-fns))
	     
	     (rate-eq-defs       (reverse (poset->rate-eq-defs* poset sys #f python-name python-state-name rhsexpr/python canonicalize-expr/python builtin-fns)))
	     
	     (reaction-eq-defs   (poset->reaction-eq-defs* poset sys python-name python-state-name rhsexpr/python canonicalize-expr/python))
	     
	     (init-eq-defs       (poset->init-defs* poset sys python-name python-state-name rhsexpr/python canonicalize-expr/python builtin-fns))
	     
	     (conserve-eq-defs   (map (lambda (eq) (list 0 `(- ,(second eq) ,(first eq)))) 
				      (poset->state-conserve-eq-defs poset sys python-name python-state-name)))
	     
	     (v-eq    (if mcap 
			  (list 'v (rhsexpr/python `(/ (neg ,(sum i-names)) ,mcap)))
			  (list 'v 0.0)))
	     
	     (dfenv 
	      (map (lambda (x) (let ((n (first x)))
				 (list n (python-name (s+ "d_" n )))))
		   defuns))

	     )
	
	(for-each 
	 (lambda (a)
	   (let ((acc-ion   (car a)))
	     (if (assoc acc-ion perm-ions)
		 (nemo:error 'nemo:python-translator 
			     ": ion species " acc-ion " cannot be declared as both accumulating and permeating"))))
	 acc-ions)

        (let ((output (open-output-file filename)))
          
          (with-output-to-port output
            (lambda ()
              (output-pyparams sysname mode i-params i-eqs const-defs
                               asgn-eq-defs init-eq-defs pool-ions perm-ions
                               mcap defaults geometry indent indent+)
              (pp indent ,nl)))
          
          (if output (close-output-port output)))

        ))
    ))
  )

(define (nemo:pyparams-translator syss . rest)
  (let-optionals rest ((mode 'multiple) (filename #f))
    (close-output-port (open-output-file filename))
    (for-each 
     (lambda (sys)
       (pyparams-translator1 sys mode filename))
     syss)))


)