# test_config.py
# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
#
# This module is part of GitPython and is released under
# the BSD License: http://www.opensource.org/licenses/bsd-license.php

import glob
import io

from git import (
    GitConfigParser
)
from git.compat import string_types
from git.config import cp
from git.test.lib import (
    TestCase,
    fixture_path,
)
from git.test.lib import with_rw_directory

import os.path as osp
from git.util import rmfile


_tc_lock_fpaths = osp.join(osp.dirname(__file__), 'fixtures/*.lock')


def _rm_lock_files():
    for lfp in glob.glob(_tc_lock_fpaths):
        rmfile(lfp)


class TestBase(TestCase):
    def setUp(self):
        _rm_lock_files()

    def tearDown(self):
        for lfp in glob.glob(_tc_lock_fpaths):
            if osp.isfile(lfp):
                raise AssertionError('Previous TC left hanging git-lock file: %s', lfp)

    def _to_memcache(self, file_path):
        with open(file_path, "rb") as fp:
            sio = io.BytesIO(fp.read())
        sio.name = file_path
        return sio

    def test_read_write(self):
        # writer must create the exact same file as the one read before
        for filename in ("git_config", "git_config_global"):
            file_obj = self._to_memcache(fixture_path(filename))
            with GitConfigParser(file_obj, read_only=False) as w_config:
                w_config.read()                 # enforce reading
                assert w_config._sections
                w_config.write()                # enforce writing

                # we stripped lines when reading, so the results differ
                assert file_obj.getvalue()
                self.assertEqual(file_obj.getvalue(), self._to_memcache(fixture_path(filename)).getvalue())

                # creating an additional config writer must fail due to exclusive access
                with self.assertRaises(IOError):
                    GitConfigParser(file_obj, read_only=False)

                # should still have a lock and be able to make changes
                assert w_config._lock._has_lock()

                # changes should be written right away
                sname = "my_section"
                
                val = "myvalue"
                w_config.add_section(sname)
                assert w_config.has_section(sname)
                w_config.set(sname, oname, val)
                assert w_config.has_option(sname, oname)
                assert w_config.get(sname, oname) == val

                sname_new = "new_section"
                
                ival = 10
                w_config.set_value(sname_new, oname_new, ival)
                assert w_config.get_value(sname_new, oname_new) == ival

                file_obj.seek(0)
                r_config = GitConfigParser(file_obj, read_only=True)
                assert r_config.has_section(sname)
                assert r_config.has_option(sname, oname)
                assert r_config.get(sname, oname) == val
        # END for each filename

    @with_rw_directory
    def test_lock_reentry(self, rw_dir):
        fpl = osp.join(rw_dir, 'l')
        gcp = GitConfigParser(fpl, read_only=False)
        with gcp as cw:
            cw.set_value('include', 'some_value', 'a')
        # entering again locks the file again...
        with gcp as cw:
            cw.set_value('include', 'some_other_value', 'b')
            # ...so creating an additional config writer must fail due to exclusive access
            with self.assertRaises(IOError):
                GitConfigParser(fpl, read_only=False)
        # but work when the lock is removed
        with GitConfigParser(fpl, read_only=False):
            assert osp.exists(fpl)
            # reentering with an existing lock must fail due to exclusive access
            with self.assertRaises(IOError):
                gcp.__enter__()

    def test_multi_line_config(self):
        file_obj = self._to_memcache(fixture_path("git_config_with_comments"))
        with GitConfigParser(file_obj, read_only=False) as config:
            ev = "ruby -e '\n"
            ev += "		system %(git), %(merge-file), %(--marker-size=%L), %(%A), %(%O), %(%B)\n"
            ev += "		b = File.read(%(%A))\n"
            ev += "		b.sub!(/^ (\\d+). do\\n=+\\nActiveRecord::Schema\\."  # noqa E501
            ev += "define.:version => (\\d+). do\\n>+ .*/) do\n"
            ev += "		  %(ActiveRecord::Schema.define(:version => #{[$1, $2].max}) do)\n"
            ev += "		end\n"
            ev += "		File.open(%(%A), %(w)) {|f| f.write(b)}\n"
            ev += "		exit 1 if b.include?(%(