#!/usr/bin/env python

# python-gphoto2 - Python interface to libgphoto2
# http://github.com/jim-easterbrook/python-gphoto2
# Copyright (C) 2014-15  Jim Easterbrook  jim@jim-easterbrook.me.uk
#
# 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.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

from collections import defaultdict
from distutils.cmd import Command
from distutils.command.upload import upload as _upload
from distutils.core import setup, Extension
import os
import re
import subprocess
import sys

# python-gphoto2 version
version = '1.3.2'

# get gphoto2 library config
gphoto2_version = '.'.join(subprocess.check_output(
    ['pkg-config', '--modversion', 'libgphoto2'],
    universal_newlines=True).split('.')[:2])
gphoto2_flags = defaultdict(list)
for flag in subprocess.check_output(
        ['pkg-config', '--cflags', '--libs', 'libgphoto2'],
        universal_newlines=True).split():
    gphoto2_flags[flag[:2]].append(flag)
gphoto2_include  = gphoto2_flags['-I']
gphoto2_libs     = gphoto2_flags['-l']
gphoto2_lib_dirs = gphoto2_flags['-L']
for n in range(len(gphoto2_include)):
    if gphoto2_include[n].endswith('/gphoto2'):
        gphoto2_include[n] = gphoto2_include[n][:-len('/gphoto2')]

# create extension modules list
ext_modules = []
info_file = os.path.join('src', 'info.txt')
if os.path.exists(info_file):
    with open(info_file) as src:
        code = compile(src.read(), info_file, 'exec')
        exec(code, globals(), locals())
else:
    swig_version = (0, 0, 0)
use_builtin = (swig_version != (2, 0, 11) and
               (swig_version >= (3, 0, 8) or sys.version_info < (3, 5)))
if 'PYTHON_GPHOTO2_BUILTIN' in os.environ:
    use_builtin = True
if 'PYTHON_GPHOTO2_NO_BUILTIN' in os.environ:
    use_builtin = False
mod_src_dir = os.path.join('src', 'swig')
if use_builtin:
    mod_src_dir += '-bi'
mod_src_dir += '-gp' + gphoto2_version
mod_src_dir +='-py' + str(sys.version_info[0])
extra_compile_args = [
    '-O3', '-Wno-unused-variable', '-Wno-strict-prototypes', '-Werror',
    '-DGPHOTO2_' + gphoto2_version.replace('.', '')]
libraries = [x.replace('-l', '') for x in gphoto2_libs]
library_dirs = [x.replace('-L', '') for x in gphoto2_lib_dirs]
include_dirs = [x.replace('-I', '') for x in gphoto2_include]
if os.path.isdir(mod_src_dir):
    for file_name in os.listdir(mod_src_dir):
        if file_name[-7:] != '_wrap.c':
            continue
        ext_name = file_name[:-7]
        ext_modules.append(Extension(
            '_' + ext_name,
            sources = [os.path.join(mod_src_dir, file_name)],
            libraries = libraries,
            library_dirs = library_dirs,
            include_dirs = include_dirs,
            extra_compile_args = extra_compile_args,
            ))

cmdclass = {}
command_options = {}

# add command to run SWIG
class build_swig(Command):
    description = 'run SWIG to regenerate interface files'
    user_options = []

    def initialize_options(self):
        pass

    def finalize_options(self):
        pass

    def run(self):
        # get list of modules (Python) and extensions (SWIG)
        file_names = os.listdir(os.path.join('src', 'gphoto2'))
        file_names.sort()
        file_names = [os.path.splitext(x) for x in file_names]
        ext_names = [x[0] for x in file_names if x[1] == '.i']
        mod_names = [x[0] for x in file_names if x[1] == '.py']
        # get gphoto2 versions to be swigged
        gp_versions = [gphoto2_version]
        if os.path.isdir('include'):
            for name in os.listdir('include'):
                match = re.match('gphoto2-(\d\.\d)', name)
                if match:
                    gp_version = match.group(1)
                    if gp_version not in gp_versions:
                        gp_versions.append(gp_version)
        self.announce('swigging gphoto2 versions %s' % str(gp_versions), 2)
        # do -builtin and not -builtin
        swig_bis = [False]
        swig_version = str(subprocess.check_output(
            ['swig', '-version'], universal_newlines=True))
        for line in swig_version.split('\n'):
            if 'Version' in line:
                swig_version = tuple(map(int, line.split()[-1].split('.')))
                if swig_version != (2, 0, 11):
                    swig_bis.append(True)
                break
        for use_builtin in swig_bis:
            # make options list
            swig_opts = ['-python', '-nodefaultctor', '-O', '-Isrc',
                         '-Wextra', '-Werror']
            if use_builtin:
                swig_opts.append('-builtin')
            if sys.version_info[0] >= 3:
                swig_opts.append('-py3')
            # do each gphoto2 version
            for gp_version in gp_versions:
                output_dir = os.path.join('src', 'swig')
                if use_builtin:
                    output_dir += '-bi'
                output_dir += '-gp' + gp_version
                output_dir += '-py' + str(sys.version_info[0])
                self.mkpath(output_dir)
                version_opts = [
                    '-DGPHOTO2_' + gp_version.replace('.', ''),
                    '-outdir', output_dir,
                    ]
                inc_dir = os.path.join('include', 'gphoto2-' + gp_version)
                if os.path.isdir(inc_dir):
                    version_opts.append('-I' + inc_dir)
                else:
                    version_opts += gphoto2_include
                # do each swig module
                for ext_name in ext_names:
                    in_file = os.path.join('src', 'gphoto2', ext_name + '.i')
                    out_file = os.path.join(output_dir, ext_name + '_wrap.c')
                    self.spawn(['swig'] + swig_opts + version_opts +
                               ['-o', out_file, in_file])
                # do each Python module
                for mod_name in mod_names:
                    in_file = os.path.join('src', 'gphoto2', mod_name + '.py')
                    out_file = os.path.join(output_dir, mod_name + '.py')
                    self.copy_file(in_file, out_file)
                # create init module
                init_file = os.path.join(output_dir, '__init__.py')
                with open(init_file, 'w') as im:
                    im.write('__version__ = "{}"\n\n'.format(version))
                    for name in mod_names + ext_names:
                        im.write('from gphoto2.{} import *\n'.format(name))
        # store SWIG version
        info_file = os.path.join('src', 'info.txt')
        with open(info_file, 'w') as info:
            info.write('swig_version = {}\n'.format(repr(swig_version)))

cmdclass['build_swig'] = build_swig

# modify upload class to add appropriate git tag
# requires GitPython - 'sudo pip install gitpython --pre'
try:
    import git
    class upload(_upload):
        def run(self):
            message = ''
            with open('CHANGELOG.txt') as cl:
                while not cl.readline().startswith('Changes'):
                    pass
                while True:
                    line = cl.readline().strip()
                    if not line:
                        break
                    message += line + '\n'
            repo = git.Repo()
            tag = repo.create_tag('v' + version, message=message)
            remote = repo.remotes.origin
            remote.push(tags=True)
            return _upload.run(self)
    cmdclass['upload'] = upload
except ImportError:
    pass

# set options for building distributions
command_options['sdist'] = {
    'formats' : ('setup.py', 'gztar zip'),
    }

# list example scripts
examples = [os.path.join('examples', x)
            for x in os.listdir('examples') if os.path.splitext(x)[1] == '.py']

with open('README.rst') as ldf:
    long_description = ldf.read()

setup(name = 'gphoto2',
      version = version,
      description = 'Python interface to libgphoto2',
      long_description = long_description,
      author = 'Jim Easterbrook',
      author_email = 'jim@jim-easterbrook.me.uk',
      url = 'https://github.com/jim-easterbrook/python-gphoto2',
      classifiers = [
          'Development Status :: 5 - Production/Stable',
          'Intended Audience :: Developers',
          'License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)',
          'Operating System :: MacOS',
          'Operating System :: MacOS :: MacOS X',
          'Operating System :: POSIX',
          'Operating System :: POSIX :: BSD :: FreeBSD',
          'Operating System :: POSIX :: BSD :: NetBSD',
          'Operating System :: POSIX :: Linux',
          'Programming Language :: Python :: 2',
          'Programming Language :: Python :: 2.6',
          'Programming Language :: Python :: 2.7',
          'Programming Language :: Python :: 3',
          'Topic :: Multimedia',
          'Topic :: Multimedia :: Graphics',
          'Topic :: Multimedia :: Graphics :: Capture',
          ],
      platforms = ['POSIX', 'MacOS'],
      license = 'GNU GPL',
      cmdclass = cmdclass,
      command_options = command_options,
      ext_package = 'gphoto2',
      ext_modules = ext_modules,
      packages = ['gphoto2'],
      package_dir = {'gphoto2' : mod_src_dir},
      data_files = [
          ('share/python-gphoto2/examples', examples),
          ('share/python-gphoto2', [
              'CHANGELOG.txt', 'LICENSE.txt', 'README.rst']),
          ],
      )
