# -*- Mode:Python; indent-tabs-mode:nil; tab-width:4; encoding:utf-8 -*-
#
# Copyright 2012 Canonical Ltd
#
# This file is part of duplicity.
#
# Duplicity 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 2 of the License, or (at your
# option) any later version.
#
# Duplicity 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 duplicity; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA


import gettext
import os
import platform
import subprocess
import sys
import time
import unittest
from importlib import reload

from duplicity import (
    backend,
    config,
    log,
    util,
)

gettext.install("duplicity", names=["ngettext"])

log.setup()
util.start_debugger()

_testing_dir = os.path.dirname(os.path.abspath(__file__))
_top_dir = os.path.dirname(_testing_dir)
_overrides_dir = os.path.join(_testing_dir, "overrides")
_bin_dir = os.path.join(_testing_dir, "overrides", "bin")

if platform.system().startswith("Darwin"):
    # Use temp space TMPDIR or from getconf, never /tmp
    _runtest_dir = os.environ.get("TMPDIR", None) or subprocess.check_output(["getconf", "DARWIN_USER_TEMP_DIR"])
    _runtest_dir = os.fsdecode(_runtest_dir).rstrip().rstrip("/")
    if not os.path.exists(_runtest_dir):
        os.makedirs(_runtest_dir)
else:
    # be a little more flexible
    _runtest_dir = os.getenv("TMPDIR", False) or os.getenv("TEMP", False) or "/tmp"

if not os.path.exists(_runtest_dir):
    os.makedirs(_runtest_dir)

# Adjust python path for duplicity and override modules
sys.path = [_overrides_dir, _top_dir, _bin_dir] + sys.path

# Also set PYTHONPATH for any subprocesses
os.environ["PYTHONPATH"] = f"{_overrides_dir}:{_top_dir}:{os.environ.get('PYTHONPATH', '')}"

# And PATH for any subprocesses
os.environ["PATH"] = f"{_bin_dir}:{os.environ.get('PATH', '')}"

# Now set some variables that help standardize test behavior
os.environ["LANG"] = ""
os.environ["GNUPGHOME"] = os.path.join(_testing_dir, "gnupg")

# bzr does not honor perms so fix the perms and avoid annoying error
os.system(f"chmod 700 {os.path.join(_testing_dir, 'gnupg')}")

# Standardize time
os.environ["TZ"] = "US/Central"
time.tzset()


class DuplicityTestCase(unittest.TestCase):
    sign_key = "839E6A2856538CCF"
    sign_passphrase = "test"
    encrypt_key1 = "839E6A2856538CCF"
    encrypt_key2 = "453005CE9B736B2A"

    def setUp(self):
        super().setUp()
        self.savedEnviron = {}
        self.savedConfig = {}

        log.setup()
        log.setverbosity(log.WARNING)
        self.set_config("print_statistics", 0)
        backend.import_backends()

        self.remove_testfiles()
        self.unpack_testfiles()

        self.set_environ("TZ", "UTC")
        time.tzset()
        assert time.tzname[0] == "UTC", f"{time.tzname[0]} should be 'UTC'"

        # Have all file references in tests relative to our runtest dir
        os.chdir(_runtest_dir)

        # reimport duplicity.config in case it changed
        reload(config)

    def tearDown(self):
        for key in self.savedEnviron:
            self._update_env(key, self.savedEnviron[key])

        for key in self.savedConfig:
            setattr(config, key, self.savedConfig[key])

        time.tzset()

        self.remove_testfiles()

        os.chdir(_testing_dir)
        super().tearDown()

    def unpack_testfiles(self):
        assert not os.system(f"rm -rf {_runtest_dir}/testfiles")
        assert not os.system(f"tar xzf {_testing_dir}/testfiles.tar.gz -C {_runtest_dir} > /dev/null 2>&1")
        assert not os.system(f"mkdir {_runtest_dir}/testfiles/output {_runtest_dir}/testfiles/cache")

    def remove_testfiles(self):
        assert not os.system(f"rm -rf {_runtest_dir}/testfiles")

    def _update_env(self, key, value):
        if value is not None:
            os.environ[key] = value
        elif key in os.environ:
            del os.environ[key]

    def set_environ(self, key, value):
        if key not in self.savedEnviron:
            self.savedEnviron[key] = os.environ.get(key)
        self._update_env(key, value)

    def set_config(self, key, value):
        assert hasattr(config, key)
        if key not in self.savedConfig:
            self.savedConfig[key] = getattr(config, key)
        setattr(config, key, value)
