"""distutils / __pkginfo__ helpers for cubicweb applications"""

import os

from os.path import isdir, join

def get_distutils_datafiles(cube, i18n=True, recursive=False):

    """

    :param cube: application cube's name

    """

    data_files = []

    data_files += get_basepyfiles(cube)

    data_files += get_webdatafiles(cube)

    if i18n:

        data_files += get_i18nfiles(cube)

    data_files += get_viewsfiles(cube, recursive=recursive)

    data_files += get_migrationfiles(cube)

    data_files += get_schemafiles(cube)

    return data_files

## listdir filter funcs ################################################

def nopyc_and_nodir(fname):

    if isdir(fname) or fname.endswith('.pyc') or fname.endswith('~'):

        return False

    return True

def no_version_control(fname):

    if fname in ('CVS', '.svn', '.hg'):

        return False

    if fname.endswith('~'):

        return False

    return True

def basepy_files(fname):

    if fname.endswith('.py') and fname != 'setup.py':

        return True

    return False

def chain(*filters):

    def newfilter(fname):

        for filterfunc in filters:

            if not filterfunc(fname):

                return False

        return True

    return newfilter

def listdir_with_path(path='.', filterfunc=None):

    if filterfunc:

        return [join(path, fname) for fname in os.listdir(path) if filterfunc(join(path, fname))]

    else:

        return [join(path, fname) for fname in os.listdir(path)]

## data_files helpers ##################################################

CUBES_DIR = join('share', 'cubicweb', 'cubes')

def get_i18nfiles(cube):

    """returns i18n files in a suitable format for distutils's

    data_files parameter

    """

    i18ndir = join(CUBES_DIR, cube, 'i18n')

    potfiles = [(i18ndir, listdir_with_path('i18n', chain(no_version_control, nopyc_and_nodir)))]

    return potfiles

def get_viewsfiles(cube, recursive=False):

    """returns views files in a suitable format for distutils's

    data_files parameter

    :param recursive: include views' subdirs recursively if True

    """

    if recursive:

        datafiles = []

        for dirpath, dirnames, filenames in os.walk('views'):

            filenames = [join(dirpath, fname) for fname in filenames

                         if nopyc_and_nodir(join(dirpath, fname))]

            dirpath = join(CUBES_DIR, cube, dirpath)

            datafiles.append((dirpath, filenames))

        return datafiles

    else:

        viewsdir = join(CUBES_DIR, cube, 'views')

        return [(viewsdir,

                 listdir_with_path('views', filterfunc=nopyc_and_nodir))]

def get_basepyfiles(cube):

    """returns cube's base python scripts (tali18n.py, etc.)

    in a suitable format for distutils's data_files parameter

    """

    return [(join(CUBES_DIR, cube),

             [fname for fname in os.listdir('.')

              if fname.endswith('.py') and fname != 'setup.py'])]

def get_webdatafiles(cube):

    """returns web's data files (css, png, js, etc.) in a suitable

    format for distutils's data_files parameter

    """

    return [(join(CUBES_DIR, cube, 'data'),

             listdir_with_path('data', filterfunc=no_version_control))]

def get_migrationfiles(cube):

    """returns cube's migration scripts

    in a suitable format for distutils's data_files parameter

    """

    return [(join(CUBES_DIR, cube, 'migration'),

             listdir_with_path('migration', no_version_control))]

def get_schemafiles(cube):

    """returns cube's schema files

    in a suitable format for distutils's data_files parameter

    """

    return [(join(CUBES_DIR, cube, 'schema'),

             listdir_with_path('schema', no_version_control))]