#!/usr/bin/env python
# This file is part of Tryton.  The COPYRIGHT file at the top level of
# this repository contains the full copyright notices and license terms.

import io
import os
import subprocess
from multiprocessing.dummy import Pool

root = os.path.dirname(os.path.dirname(__file__))
module_path = os.path.join(root, 'modules')

dependencies = set()
development_dependencies = {
    'Babel',
    'Sphinx',
    'cookiecutter',
    'rnc2rng',
    'sphinx-lint',
    'tox',
    }

FNULL = open(os.devnull, 'w')


def add_dependencies(package, path):
    egg_info_name = '%s.egg-info' % package
    egg_info = os.path.join(path, egg_info_name)
    if (not os.path.isdir(egg_info)
            or (os.path.getmtime(os.path.join(path, 'setup.py'))
                > os.path.getmtime(os.path.join(egg_info, 'requires.txt')))
            or (os.path.exists(os.path.join(path, 'tryton.cfg'))
                and os.path.getmtime(os.path.join(path, 'tryton.cfg'))
                > os.path.getmtime(os.path.join(egg_info, 'requires.txt')))):
        subprocess.call(
            ['./setup.py', 'egg_info'],
            cwd=path,
            stdout=FNULL,
            stderr=FNULL)
    with io.open(os.path.join(egg_info, 'requires.txt')) as f:
        development = False
        for dependency in f.readlines():
            dependency = dependency.strip('\n')
            # Do not include trytond requirements as we have its source code
            if (not dependency
                    or dependency.startswith('trytond')
                    or dependency.startswith('proteus')):
                continue
            # Always include optional dependencies as development
            if dependency[0].startswith('['):
                development = True
                continue
            # Remove version numbers
            for char in ['>', '<', '=']:
                dependency = dependency.split(char)[0]
            if development:
                development_dependencies.add(dependency)
            else:
                dependencies.add(dependency)


pool = Pool()
pool.apply_async(add_dependencies,
    ('trytond', os.path.join(root, 'trytond')))
pool.apply_async(add_dependencies,
    ('tryton', os.path.join(root, 'tryton')))
pool.apply_async(add_dependencies,
    ('proteus', os.path.join(root, 'proteus')))
pool.apply_async(add_dependencies,
    ('trytond_gis', os.path.join(root, 'trytond-gis')))

for module in os.listdir(module_path):
    path = os.path.join(module_path, module)
    if not os.path.isdir(path):
        continue
    pool.apply_async(
        add_dependencies, ('trytond_%s' % module, path))

pool.close()
pool.join()

with io.open(os.path.join(root, 'requirements.txt'), 'w') as fp:
    fp.writelines(map(lambda d: d + '\n', sorted(dependencies)))

with io.open(os.path.join(root, 'requirements-dev.txt'), 'w') as fp:
    fp.writelines(map(lambda d: d + '\n', sorted(development_dependencies)))