import fnmatch
import glob
import os
import sys

import numpy

from Cython.Distutils import build_ext as cython_build_ext

from distutils.command.build import build
from distutils.core import setup, Extension
from distutils.sysconfig import get_config_vars
from distutils.util import convert_path

try:
    import sphinx
except ImportError:
    sphinx = None

try:
    import stdeb
except ImportError:
    stdeb = None

#################################
# Modules variables
#################################
EXCLUDE = ['*.py', '*.pyc', '*$py.class', '*~', '.*', '*.bak', '*.so', '*.pyd']

EXCLUDE_DIRECTORIES = ('.*', 'CVS', '_darcs', './build','*svn','./dist', 'EGG-INFO', '*.egg-info')

EXTENSIONS_PATH = "Extensions"

INCLUDE_DIR = [numpy.get_include()]

QHULL_DIR = os.path.join("Extensions","qhull_lib")

QHULL_INCLUDE_DIR = INCLUDE_DIR + [EXTENSIONS_PATH] + [os.path.join(QHULL_DIR,"ext")] + [os.path.join(QHULL_DIR,"src")]

#################################
# Helper function
#################################

def is_package(path):
    return (os.path.isdir(path) and os.path.isfile(os.path.join(path, '__init__.py')))

def find_packages(path, base="", exclude=None):

    packages = {}

    for item in os.listdir(path):
        d = os.path.join(path, item)
        if exclude is not None and (os.path.abspath(d) == os.path.abspath(exclude)):
            continue
        if is_package(d):
            if base:
                module_name = "%(base)s.%(item)s" % vars()
            else:
                module_name = item
            packages[module_name] = d
            packages.update(find_packages(d, module_name, exclude))
            
    return packages

def find_package_data(where='.', package='', exclude=EXCLUDE, exclude_directories=EXCLUDE_DIRECTORIES, only_in_packages=True, show_ignored=False):
    
    out = {}
    stack = [(convert_path(where), '', package, only_in_packages)]
    while stack:
        where, prefix, package, only_in_packages = stack.pop(0)
        for name in os.listdir(where):
            fn = os.path.join(where, name)
            if os.path.isdir(fn):
                bad_name = False
                for pattern in exclude_directories:
                    if (fnmatch.fnmatchcase(name, pattern)
                        or fn.lower() == pattern.lower()):
                        bad_name = True
                        if show_ignored:
                            print >> sys.stderr, ("Directory %s ignored by pattern %s" % (fn, pattern))
                        break
                if bad_name:
                    continue
                if (os.path.isfile(os.path.join(fn, '__init__.py')) and not prefix):
                    if not package:
                        new_package = name
                    else:
                        new_package = package + '.' + name
                    stack.append((fn, '', new_package, False))
                else:
                    stack.append((fn, prefix + name + '/', package, only_in_packages))
            elif package or not only_in_packages:
                # is a file
                bad_name = False
                for pattern in exclude:
                    if (fnmatch.fnmatchcase(name, pattern)
                        or fn.lower() == pattern.lower()):
                        bad_name = True
                        if show_ignored:
                            print >> sys.stderr, ("File %s ignored by pattern %s" % (fn, pattern))
                        break
                if bad_name:
                    continue
                out.setdefault(package, []).append(prefix+name)
    
    return out


def find_data(where=".", exclude=EXCLUDE, exclude_directories=EXCLUDE_DIRECTORIES, prefix=""):

    out = {}
    stack = [convert_path(where)]
    while stack:
        where = stack.pop(0)
        for name in os.listdir(where):
            fn = os.path.join(where, name)
            d = os.path.join(prefix,os.path.dirname(fn))
            if os.path.isdir(fn):
                stack.append(fn)
            else:
                bad_name = False
                for pattern in exclude:
                    if (fnmatch.fnmatchcase(name, pattern) or fn.lower() == pattern.lower()):
                        bad_name = True
                        break
                if bad_name:
                    continue
                out.setdefault(d, []).append(fn)
            
    out = [(k,v) for k, v in out.items()]
    
    return out


#################################
# Packages section
#################################

PACKAGE_INFO = {}
execfile('MDANSE/__pkginfo__.py', {}, PACKAGE_INFO)

PACKAGES = find_packages(path=".")
PACKAGES = PACKAGES.keys()

#################################
# Package data section
#################################

# Retrieve all the data related to the MDANSE package.
PACKAGE_DATA = find_package_data(where='MDANSE', package='MDANSE', show_ignored=False)

#################################
# User data section
#################################

DATA_FILES = []
DATA_FILES.extend(find_data('Doc',exclude=[],prefix='conf_'))

#################################
# Scripts section
#################################

SCRIPTS_PATH = "Scripts"
SCRIPTS = glob.glob(os.path.join(SCRIPTS_PATH,'mdanse*'))

#################################
# Documentation
#################################

if sphinx:
    import sphinx.apidoc
    import sphinx.setup_command

    class mdanse_build_doc(sphinx.setup_command.BuildDoc):
                              
        def run(self):
            
            build = self.get_finalized_command('build')
                    
            buildDir = os.path.abspath(build.build_lib)

            sys.path.insert(0,buildDir)

            sphinxDir = os.path.join(build.build_base,'sphinx',self.doctype)
                                 
            metadata = self.distribution.metadata
            
            # /!\ apidoc.main is deprecated. The API has been broken in sphinx 1.7.0, see https://github.com/sphinx-doc/sphinx/issues/4615
            if int(sphinx.__version__.split(".")[1]) <= 6:
                sphinx.apidoc.main(['',
                                '-F',
                                '--separate',
                                '-H', metadata.name,
                                '-A', metadata.author,
                                '-V', metadata.version,
                                '-R', metadata.version,
                                '-o', sphinxDir,
                                os.path.join(buildDir,'MDANSE'),
                                os.path.join(buildDir,'MDANSE','Externals')])
            else:
                sphinx.apidoc.main('', [
                                '-F',
                                '--separate',
                                '-H', metadata.name,
                                '-A', metadata.author,
                                '-V', metadata.version,
                                '-R', metadata.version,
                                '-o', sphinxDir,
                                os.path.join(buildDir,'MDANSE'),
                                os.path.join(buildDir,'MDANSE','Externals')])
            curDir = os.getcwd()
                 
            import shutil
            shutil.copy(os.path.join(curDir,'Doc','conf_%s.py' % self.doctype),os.path.join(sphinxDir,'conf.py'))
            shutil.copy(os.path.join(curDir,'Doc','mdanse_logo.png'),os.path.join(sphinxDir,'_static'))
            shutil.copy(os.path.join(curDir,'Doc','layout.html'),os.path.join(sphinxDir,'_templates'))
     
            # The directory where the rst files are located.
            self.source_dir = sphinxDir
            # The directory where the conf.py file is located.
            self.config_dir = self.source_dir
     
            # The directory where the documentation will be built
            self.build_dir = os.path.join(buildDir,'MDANSE','Doc',self.doctype)
            
            self.finalize_options()
                                                     
            sphinx.setup_command.BuildDoc.run(self)
                 
            sys.path.pop(0)
            
    class mdanse_build_help(mdanse_build_doc):
        
        doctype = 'help'

    class mdanse_build_api(mdanse_build_doc):
        
        doctype = 'api'

#################################
# Debian packaging
#################################

class mdanse_build(build):

    def has_sphinx(self):
        if sphinx is None:
            return False
        setup_dir = os.path.dirname(os.path.abspath(__file__))
        return os.path.isdir(os.path.join(setup_dir, 'Doc'))
    
    sub_commands = build.sub_commands + [('build_api', has_sphinx),('build_help',has_sphinx)]
                        
#################################
# Extensions section
#################################

if 'linux' in sys.platform:
    (opt,) = get_config_vars('OPT')
    os.environ['OPT'] = " ".join(flag for flag in opt.split() if flag != '-Wstrict-prototypes')

EXTENSIONS = [Extension('MDANSE.Extensions.distance_histogram',
                        include_dirs=INCLUDE_DIR,
                        sources = [os.path.join("Extensions",'distance_histogram.pyx')]),
              Extension('MDANSE.Extensions.fast_calculation',
                        include_dirs=INCLUDE_DIR,
                        sources = [os.path.join("Extensions",'fast_calculation.pyx')]),
              Extension('MDANSE.Extensions.sas_fast_calc',
                        include_dirs=INCLUDE_DIR,
                        sources = [os.path.join("Extensions",'sas_fast_calc.pyx')]),
              Extension('MDANSE.Extensions.mt_fast_calc',
                        include_dirs=INCLUDE_DIR,
                        sources = [os.path.join("Extensions",'mt_fast_calc.pyx')]),
              Extension('MDANSE.Extensions.sd_fast_calc',
                        include_dirs=INCLUDE_DIR,
                        sources = [os.path.join("Extensions",'sd_fast_calc.pyx')]),
              Extension('MDANSE.Extensions.mic_fast_calc', 
                        include_dirs=INCLUDE_DIR,
                        sources = [os.path.join("Extensions",'mic_fast_calc.pyx')],
                        language="c++"),
              Extension('MDANSE.Extensions.qhull',
                        include_dirs  = QHULL_INCLUDE_DIR,
                        sources =  glob.glob(os.path.join(QHULL_DIR, 'src','*.c')) + [os.path.join("Extensions",'qhull.pyx')],
                        define_macros = [('qh_QHpointer','1')]),
              Extension('MDANSE.Extensions.xtc',
                        include_dirs=[numpy.get_include(),os.path.join('Extensions','xtc','include')],
                        sources=glob.glob(os.path.join('Extensions','xtc','src','*.c')) + [os.path.join('Extensions','xtc','xtc.pyx')])
              ]

CMDCLASS = {'build'     : mdanse_build,
            'build_ext' : cython_build_ext}

if sphinx:
    CMDCLASS['build_api'] = mdanse_build_api
    CMDCLASS['build_help'] = mdanse_build_help
             
#################################
# The setup section
#################################

setup (name             = "MDANSE",
       version          = PACKAGE_INFO["__version__"],
       description      = PACKAGE_INFO["__description__"],
       long_description = PACKAGE_INFO["__long_description__"],
       author           = PACKAGE_INFO["__author__"],
       author_email     = PACKAGE_INFO["__author_email__"],
       maintainer       = PACKAGE_INFO["__maintainer__"],
       maintainer_email = PACKAGE_INFO["__maintainer_email__"],
       url              = PACKAGE_INFO["__url__"],
       license          = PACKAGE_INFO["__license__"],
       packages         = PACKAGES,
       package_data     = PACKAGE_DATA,
       data_files       = DATA_FILES,
       platforms        = ['Unix','Windows'],
       ext_modules      = EXTENSIONS,
       scripts          = SCRIPTS,
       cmdclass         = CMDCLASS,
       install_requires = ['Jinja2'])