#!/usr/bin/env python
"""

Build F90 module support for f2py2e.

Copyright 2000 Pearu Peterson all rights reserved,
Pearu Peterson <pearu@ioc.ee>
Permission to use, modify, and distribute this software is given under the
terms of the NumPy License.

NO WARRANTY IS EXPRESSED OR IMPLIED.  USE AT YOUR OWN RISK.
$Date: 2005/02/03 19:30:23 $
Pearu Peterson

"""
from __future__ import division, absolute_import, print_function

__version__ = "$Revision: 1.27 $"[10:-1]

f2py_version='See `f2py -v`'

import pprint
import sys
errmess=sys.stderr.write
outmess=sys.stdout.write
show=pprint.pprint

from .auxfuncs import *
import numpy as np
from . import capi_maps
from . import func2subr
from .crackfortran import undo_rmbadname, undo_rmbadname1

options={}

def findf90modules(m):
    if ismodule(m): return [m]
    if not hasbody(m): return []
    ret = []
    for b in m['body']:
        if ismodule(b): ret.append(b)
        else: ret=ret+findf90modules(b)
    return ret

fgetdims1 = """\
      external f2pysetdata
      logical ns
      integer r,i,j
      integer(%d) s(*)
      ns = .FALSE.
      if (allocated(d)) then
         do i=1,r
            if ((size(d,i).ne.s(i)).and.(s(i).ge.0)) then
               ns = .TRUE.
            end if
         end do
         if (ns) then
            deallocate(d)
         end if
      end if
      if ((.not.allocated(d)).and.(s(1).ge.1)) then""" % np.intp().itemsize

fgetdims2="""\
      end if
      if (allocated(d)) then
         do i=1,r
            s(i) = size(d,i)
         end do
      end if
      flag = 1
      call f2pysetdata(d,allocated(d))"""

fgetdims2_sa="""\
      end if
      if (allocated(d)) then
         do i=1,r
            s(i) = size(d,i)
         end do
         !s(r) must be equal to len(d(1))
      end if
      flag = 2
      call f2pysetdata(d,allocated(d))"""


def buildhooks(pymod):
    global fgetdims1, fgetdims2
    from . import rules
    ret = {'f90modhooks':[],'initf90modhooks':[],'body':[],
           'need':['F_FUNC', 'arrayobject.h'],
           'separatorsfor':{'includes0':'\n','includes':'\n'},
           'docs':['"Fortran 90/95 modules:\\n"'],
           'latexdoc':[]}
    fhooks=['']
    def fadd(line,s=fhooks): s[0] = '%s\n      %s'%(s[0], line)
    doc = ['']
    def dadd(line,s=doc): s[0] = '%s\n%s'%(s[0], line)
    for m in findf90modules(pymod):
        sargs, fargs, efargs, modobjs, notvars, onlyvars=[], [], [], [], [m['name']], []
        sargsp = []
        ifargs = []
        mfargs = []
        if hasbody(m):
            for b in m['body']: notvars.append(b['name'])
        for n in m['vars'].keys():
            var = m['vars'][n]
            if (n not in notvars) and (not l_or(isintent_hide, isprivate)(var)):
                onlyvars.append(n)
                mfargs.append(n)
        outmess('\t\tConstructing F90 module support for "%s"...\n'%(m['name']))
        if onlyvars:
            outmess('\t\t  Variables: %s\n'%(' '.join(onlyvars)))
        chooks=['']
        def cadd(line,s=chooks): s[0] = '%s\n%s'%(s[0], line)
        ihooks=['']
        def iadd(line,s=ihooks): s[0] = '%s\n%s'%(s[0], line)

        vrd=capi_maps.modsign2map(m)
        cadd('static FortranDataDef f2py_%s_def[] = {'%(m['name']))
        dadd('\\subsection{Fortran 90/95 module \\texttt{%s}}\n'%(m['name']))
        if hasnote(m):
            note = m['note']
            if isinstance(note, list): note='\n'.join(note)
            dadd(note)
        if onlyvars:
            dadd('\\begin{description}')
        for n in onlyvars:
            var = m['vars'][n]
            modobjs.append(n)
            ct = capi_maps.getctype(var)
            at = capi_maps.c2capi_map[ct]
            dm = capi_maps.getarrdims(n, var)
            dms = dm['dims'].replace('*', '-1').strip()
            dms = dms.replace(':', '-1').strip()
            if not dms: dms='-1'
            use_fgetdims2 = fgetdims2
            if isstringarray(var):
                if 'charselector' in var and 'len' in var['charselector']:
                    cadd('\t{"%s",%s,{{%s,%s}},%s},'\
                         %(undo_rmbadname1(n), dm['rank'], dms, var['charselector']['len'], at))
                    use_fgetdims2 = fgetdims2_sa
                else:
                    cadd('\t{"%s",%s,{{%s}},%s},'%(undo_rmbadname1(n), dm['rank'], dms, at))
            else:
                cadd('\t{"%s",%s,{{%s}},%s},'%(undo_rmbadname1(n), dm['rank'], dms, at))
            dadd('\\item[]{{}\\verb@%s@{}}'%(capi_maps.getarrdocsign(n, var)))
            if hasnote(var):
                note = var['note']
                if isinstance(note, list): note='\n'.join(note)
                dadd('--- %s'%(note))
            if isallocatable(var):
                fargs.append('f2py_%s_getdims_%s'%(m['name'], n))
                efargs.append(fargs[-1])
                sargs.append('void (*%s)(int*,int*,void(*)(char*,int*),int*)'%(n))
                sargsp.append('void (*)(int*,int*,void(*)(char*,int*),int*)')
                iadd('\tf2py_%s_def[i_f2py++].func = %s;'%(m['name'], n))
                fadd('subroutine %s(r,s,f2pysetdata,flag)'%(fargs[-1]))
                fadd('use %s, only: d => %s\n'%(m['name'], undo_rmbadname1(n)))
                fadd('integer flag\n')
                fhooks[0]=fhooks[0]+fgetdims1
                dms = eval('range(1,%s+1)'%(dm['rank']))
                fadd(' allocate(d(%s))\n'%(','.join(['s(%s)'%i for i in dms])))
                fhooks[0]=fhooks[0]+use_fgetdims2
                fadd('end subroutine %s'%(fargs[-1]))
            else:
                fargs.append(n)
                sargs.append('char *%s'%(n))
                sargsp.append('char*')
                iadd('\tf2py_%s_def[i_f2py++].data = %s;'%(m['name'], n))
        if onlyvars:
            dadd('\\end{description}')
        if hasbody(m):
            for b in m['body']:
                if not isroutine(b):
                    print('Skipping', b['block'], b['name'])
                    continue
                modobjs.append('%s()'%(b['name']))
                b['modulename'] = m['name']
                api, wrap=rules.buildapi(b)
                if isfunction(b):
                    fhooks[0]=fhooks[0]+wrap
                    fargs.append('f2pywrap_%s_%s'%(m['name'], b['name']))
                    #efargs.append(fargs[-1])
                    ifargs.append(func2subr.createfuncwrapper(b, signature=1))
                else:
                    if wrap:
                        fhooks[0]=fhooks[0]+wrap
                        fargs.append('f2pywrap_%s_%s'%(m['name'], b['name']))
                        ifargs.append(func2subr.createsubrwrapper(b, signature=1))
                    else:
                        fargs.append(b['name'])
                        mfargs.append(fargs[-1])
                    #if '--external-modroutines' in options and options['--external-modroutines']:
                    #    outmess('\t\t\tapplying --external-modroutines for %s\n'%(b['name']))
                    #     efargs.append(fargs[-1])
                api['externroutines']=[]
                ar=applyrules(api, vrd)
                ar['docs']=[]
                ar['docshort']=[]
                ret=dictappend(ret, ar)
                cadd('\t{"%s",-1,{{-1}},0,NULL,(void *)f2py_rout_#modulename#_%s_%s,doc_f2py_rout_#modulename#_%s_%s},'%(b['name'], m['name'], b['name'], m['name'], b['name']))
                sargs.append('char *%s'%(b['name']))
                sargsp.append('char *')
                iadd('\tf2py_%s_def[i_f2py++].data = %s;'%(m['name'], b['name']))
        cadd('\t{NULL}\n};\n')
        iadd('}')
        ihooks[0]='static void f2py_setup_%s(%s) {\n\tint i_f2py=0;%s'%(m['name'], ','.join(sargs), ihooks[0])
        if '_' in m['name']:
            F_FUNC='F_FUNC_US'
        else:
            F_FUNC='F_FUNC'
        iadd('extern void %s(f2pyinit%s,F2PYINIT%s)(void (*)(%s));'\
             %(F_FUNC, m['name'], m['name'].upper(), ','.join(sargsp)))
        iadd('static void f2py_init_%s(void) {'%(m['name']))
        iadd('\t%s(f2pyinit%s,F2PYINIT%s)(f2py_setup_%s);'\
             %(F_FUNC, m['name'], m['name'].upper(), m['name']))
        iadd('}\n')
        ret['f90modhooks']=ret['f90modhooks']+chooks+ihooks
        ret['initf90modhooks']=['\tPyDict_SetItemString(d, "%s", PyFortranObject_New(f2py_%s_def,f2py_init_%s));'%(m['name'], m['name'], m['name'])]+ret['initf90modhooks']
        fadd('')
        fadd('subroutine f2pyinit%s(f2pysetupfunc)'%(m['name']))
        #fadd('use %s'%(m['name']))
        if mfargs:
            for a in undo_rmbadname(mfargs):
                fadd('use %s, only : %s'%(m['name'], a))
        if ifargs:
            fadd(' '.join(['interface']+ifargs))
            fadd('end interface')
        fadd('external f2pysetupfunc')
        if efargs:
            for a in undo_rmbadname(efargs):
                fadd('external %s'%(a))
        fadd('call f2pysetupfunc(%s)'%(','.join(undo_rmbadname(fargs))))
        fadd('end subroutine f2pyinit%s\n'%(m['name']))

        dadd('\n'.join(ret['latexdoc']).replace(r'\subsection{', r'\subsubsection{'))

        ret['latexdoc']=[]
        ret['docs'].append('"\t%s --- %s"'%(m['name'],
                                            ','.join(undo_rmbadname(modobjs))))

    ret['routine_defs']=''
    ret['doc']=[]
    ret['docshort']=[]
    ret['latexdoc']=doc[0]
    if len(ret['docs'])<=1: ret['docs']=''
    return ret, fhooks[0]
