#!/usr/bin/env python3
#
#   Builds a iOS Framework of PETSc
#
#   export PETSC_ARCH=arch-ios-simulator
#
#   ./systems/Apple/iOS/bin/arch-ios-simulator.py [use --with-debugging=0 to get iPhone/iPad version, otherwise creates simulator version]
#      this sets up the appropriate configuration file
#
#   ./systems/Apple/iOS/bin/iosbuilder.py
#      this creates the PETSc iPhone/iPad library
#      this will open Xcode and give you directions to follow
#
#   open systems/Apple/iOS/examples/examples.xcodeproj
#       Project -> Edit Project Setting  -> Configuration (make sure it is Release or Debug depending on if you used --with-debugging=0)
#       Build -> Build and Debug
#
from __future__ import print_function
import os, sys

sys.path.insert(0, os.path.join(os.environ['PETSC_DIR'], 'config'))
sys.path.insert(0, os.path.join(os.environ['PETSC_DIR'], 'config', 'BuildSystem'))

import script

class PETScMaker(script.Script):
 def __init__(self):
   import RDict
   import os

   argDB = RDict.RDict(None, None, 0, 0, readonly = True)
   argDB.saveFilename = os.path.join(os.environ['PETSC_DIR'], os.environ['PETSC_ARCH'], 'lib','petsc','conf', 'RDict.db')
   argDB.load()
   script.Script.__init__(self, argDB = argDB)
   self.log = sys.stdout
   return

 def setupModules(self):
   self.mpi           = self.framework.require('config.packages.MPI',         None)
   self.base          = self.framework.require('config.base',                 None)
   self.setCompilers  = self.framework.require('config.setCompilers',         None)
   self.arch          = self.framework.require('PETSc.options.arch',        None)
   self.petscdir      = self.framework.require('PETSc.options.petscdir',    None)
   self.languages     = self.framework.require('PETSc.options.languages',   None)
   self.debugging     = self.framework.require('PETSc.options.debugging',   None)
   self.opengles      = self.framework.require('config.packages.opengles',     None)
   self.make          = self.framework.require('config.programs',             None)
   self.compilers     = self.framework.require('config.compilers',            None)
   self.types         = self.framework.require('config.types',                None)
   self.headers       = self.framework.require('config.headers',              None)
   self.functions     = self.framework.require('config.functions',            None)
   self.libraries     = self.framework.require('config.libraries',            None)
   self.scalarType    = self.framework.require('PETSc.options.scalarTypes', None)
   self.memAlign      = self.framework.require('PETSc.options.memAlign',    None)
   self.libraryOptions= self.framework.require('PETSc.options.libraryOptions', None)
   self.compilerFlags = self.framework.require('config.compilerFlags', self)
   return

 def setupHelp(self, help):
   import nargs

   help = script.Script.setupHelp(self, help)
   help.addArgument('RepManager', '-rootDir', nargs.ArgDir(None, os.environ['PETSC_DIR'], 'The root directory for this build', isTemporary = 1))
   help.addArgument('RepManager', '-dryRun',  nargs.ArgBool(None, False, 'Only output what would be run', isTemporary = 1))
   help.addArgument('RepManager', '-skipXCode',  nargs.ArgBool(None, False, 'Do not run XCode application/files have not been added/removed', isTemporary = 1))
   help.addArgument('RepManager', '-verbose', nargs.ArgInt(None, 0, 'The verbosity level', min = 0, isTemporary = 1))
   return help

 def setup(self):
   script.Script.setup(self)
   self.framework = self.loadConfigure()
   self.setupModules()
   return

 @property
 def verbose(self):
   '''The verbosity level'''
   return self.argDB['verbose']

 @property
 def skipXCode(self):
   '''Skip XCode application'''
   return self.argDB['skipXCode']

 @property
 def dryRun(self):
   '''Flag for only output of what would be run'''
   return self.argDB['dryRun']

 def getPackageInfo(self):
   packageIncludes = []
   packageLibs     = []
   for p in self.framework.packages:
     # Could put on compile line, self.addDefine('HAVE_'+i.PACKAGE, 1)
     if hasattr(p, 'lib'):
       if not isinstance(p.lib, list):
         packageLibs.append(p.lib)
       else:
         packageLibs.extend(p.lib)
     if hasattr(p, 'include'):
       if not isinstance(p.include, list):
         packageIncludes.append(p.include)
       else:
         packageIncludes.extend(p.include)
   packageLibs     = self.libraries.toStringNoDupes(packageLibs+self.libraries.math)
   packageIncludes = self.headers.toStringNoDupes(packageIncludes)
   return packageIncludes, packageLibs

 def buildDir(self, dirname):
   ''' This is run in a PETSc source directory'''
   if self.verbose: print('Entering '+dirname)
   os.chdir(dirname)
   l = len(os.environ['PETSC_DIR'])
   basedir = os.path.join(os.environ['PETSC_DIR'],os.environ['PETSC_ARCH'],'xcode-links')
   #newdirname = os.path.join(basedir,dirname[l+1:])
   #os.mkdir(newdirname)


   # Get list of source files in the directory
   cnames = []
   onames = []
   fnames = []
   hnames = []
   for f in os.listdir(dirname):
     ext = os.path.splitext(f)[1]
     if ext == '.c':
       cnames.append(f)
       onames.append(f.replace('.c', '.o'))
     if ext == '.h':
       hnames.append(f)
   if cnames:
     if self.verbose: print('Linking C files',cnames)
     for i in cnames:
       j = i[l+1:]
       if not os.path.islink(os.path.join(basedir,i)) and not i.startswith('.') and i.find(".BACKUP") == -1 and i.find(".LOCAL") == -1 and i.find(".BASE") == -1:
         if i.endswith('openglops.c') and not os.path.islink(os.path.join(basedir,'openglops.m')):
           os.symlink(os.path.join(dirname,i),os.path.join(basedir,'openglops.m'))
         else:
           os.symlink(os.path.join(dirname,i),os.path.join(basedir,i))
   # do not need to link these because xcode project points to original source code directory
   #if hnames:
   #  if self.verbose: print 'Linking h files',hnames
   #  for i in hnames:
   #    if not os.path.islink(os.path.join(basedir,i)):
   #      os.symlink(os.path.join(dirname,i),os.path.join(basedir,i))
   return

 def checkDir(self, dirname):
   '''Checks whether we should recurse into this directory
   - Excludes projects directory
   - Excludes examples directory
   - Excludes contrib directory
   - Excludes tutorials directory
   - Excludes benchmarks directory
   - Checks makefile to see if compiler is allowed to visit this directory for this configuration'''
#   print self.functions.functions
#   print self.base.defines
   base = os.path.basename(dirname)

   if base == 'examples': return False
   if base == 'projects': return False
   if base.startswith('ftn-'): return False
   if base == 'contrib':  return False
   if base == 'tutorials':  return False
   if base == 'benchmarks':  return False
   if base == 'systems':  return False
# for some reason agrmes is in the repository but not used!
   if base == 'agmres':  return False
   if base == 'test-dir':  return False
   if base.startswith('arch-'):  return False

   import re
   reg   = re.compile(' [ ]*')
   fname = os.path.join(dirname, 'makefile')
   if not os.path.isfile(fname):
     if os.path.isfile(os.path.join(dirname, 'Makefile')): print('ERROR: Change Makefile to makefile in',dirname)
     return False
   fd = open(fname)
   text = fd.readline()
   while text:
     if text.startswith('#requires'):
       text = text[9:-1].strip()
       text = reg.sub(' ',text)
       rtype = text.split(' ')[0]
       rvalue = text.split(' ')[1]

       if rvalue == "'"+'PETSC_USE_FORTRAN'+"'":
         if not hasattr(self.compilers, 'FC'):
           if self.verbose: print('Rejecting',dirname,'because fortran is not being used')
           return 0
       elif rvalue == "'"+'PETSC_USE_LOG'+"'":
         if not self.libraryOptions.useLog:
           if self.verbose: print('Rejecting',dirname,'because logging is turned off')
           return 0
       elif rvalue == "'"+'PETSC_USE_FORTRAN_KERNELS'+"'":
         if not self.libraryOptions.useFortranKernels:
           if self.verbose: print('Rejecting',dirname,'because fortran kernels are turned off')
           return 0
       elif rtype == 'scalar' and not self.scalarType.scalartype == rvalue:
         if self.verbose: print('Rejecting',dirname,'because scalar type '+self.scalarType.scalartype+' is not '+rvalue)
         return 0
       elif rtype == 'language':
         if rvalue == 'CXXONLY' and self.languages.clanguage == 'C':
           if self.verbose: print('Rejecting',dirname,'because language is '+self.languages.clanguage+' is not C++')
           return 0
       elif rtype == 'precision' and not rvalue == self.scalarType.precision:
         if self.verbose: print('Rejecting',dirname,'because precision '+self.scalarType.precision+' is not '+rvalue)
         return 0
       elif rtype == 'package':
         found = 0
         if self.mpi.usingMPIUni:
           pname = 'PETSC_HAVE_MPIUNI'
           pname = "'"+pname+"'"
           if pname == rvalue: found = 1
         for i in self.framework.packages:
           pname = 'PETSC_HAVE_'+i.PACKAGE
           pname = "'"+pname+"'"
           if pname == rvalue: found = 1
         if not found:
           for i in self.base.defines:
             pname = 'PETSC_'+i.upper()
             pname = "'"+pname+"'"
             if pname == rvalue: found = 1
           for i in self.opengles.defines:
             pname = 'PETSC_'+i.upper()
             pname = "'"+pname+"'"
             if pname == rvalue: found = 1
           if not found:
             if self.verbose: print('Rejecting',dirname,'because package '+rvalue+' does not exist')
             return 0
       elif rtype == 'define':
         found = 0
         for i in self.base.defines:
           pname = 'PETSC_'+i.upper()
           pname = "'"+pname+"'"
           if pname == rvalue: found = 1
         if not found:
           if self.verbose: print('Rejecting',dirname,'because define '+rvalue+' does not exist')
           return 0
       elif rtype == 'function':
         found = 0
         for i in self.functions.functions:
           pname = 'PETSC_HAVE_'+i.upper()
           pname = "'"+pname+"'"
#           print pname
#           print rvalue
           if pname == rvalue: found = 1
         if not found:
           if self.verbose: print('Rejecting',dirname,'because function '+rvalue+' does not exist')
           return 0

     text = fd.readline()
   fd.close()
   return True

 def buildAll(self, rootDir = None):
   import shutil
   self.setup()
   if rootDir is None:
     rootDir = self.argDB['rootDir']
   if not self.checkDir(rootDir):
     print('Nothing to be done')
   if rootDir == os.environ['PETSC_DIR']:
     basedir = os.path.join(self.petscdir.dir, self.arch.arch, 'xcode-links')
     if os.path.isdir(basedir):
       if self.verbose: print('Removing '+basedir)
       shutil.rmtree(basedir)
   os.mkdir(basedir)
   for root, dirs, files in os.walk(rootDir):
     self.buildDir(root)
     for badDir in [d for d in dirs if not self.checkDir(os.path.join(root, d))]:
       dirs.remove(badDir)

   if not self.skipXCode:

     print('In Xcode mouse click on Other Sources then xcode-links and the delete key, then')
     print('control mouse click on "Other Sources" and select "Add files to PETSc ...", then')
     print('in the finder window locate ${PETSC_DIR}/arch-ios/xcode-links and select it. Now')
     print('exit Xcode')

     try:
       import subprocess
       subprocess.call('cd '+os.path.join(os.environ['PETSC_DIR'],'systems','Apple','iOS','PETSc')+';open -W PETSc.xcodeproj', shell=True)
     except RuntimeError as e:
       raise RuntimeError('Error opening xcode project '+str(e))


   sdk         = ' -sdk iphonesimulator '
   destination = 'iphonesimulator'
   debug       = 'Debug'
   debugdir    = 'Debug-'+destination
   if not self.compilerFlags.debugging:
     debug = 'Release'
     debugdir = 'Release-'+destination
   try:
     output,err,ret  = self.executeShellCommand('cd '+os.path.join(os.environ['PETSC_DIR'],'systems','Apple','iOS','PETSc')+';xcodebuild -arch x86_64 -configuration '+debug+sdk, timeout=3000, log = self.log)
   except RuntimeError as e:
     raise RuntimeError('Error making iPhone/iPad version of PETSc libraries: '+str(e))

   liblocation = os.path.join(os.environ['PETSC_DIR'],'systems','Apple','iOS','PETSc','build','Debug-iphonesimulator','PETSc.framework','PETSc')
   if not os.path.exists(liblocation):
     raise RuntimeError('Error library '+liblocation+' not created')
   try:
     output,err,ret  = self.executeShellCommand('cp -f '+liblocation+' '+os.path.join(os.environ['PETSC_DIR'],os.environ['PETSC_ARCH'],'lib','PETSc_framework'), timeout=30, log = self.log)
   except RuntimeError as e:
     raise RuntimeError('Error copying iPhone/iPad version of PETSc libraries: '+str(e))

   return

def noCheckCommand(command, status, output, error):
  ''' Do no check result'''
  return
  noCheckCommand = staticmethod(noCheckCommand)

if __name__ == '__main__':
  PETScMaker().buildAll()