# -*- coding: utf-8 -*-

# Import python libs
from __future__ import absolute_import, print_function, unicode_literals

import os

import salt.modules.environ as envmodule
import salt.modules.reg

# Import salt libs
import salt.states.environ as envstate
import salt.utils.platform

# Import Salt Testing libs
from tests.support.mixins import LoaderModuleMockMixin
from tests.support.mock import MagicMock, patch
from tests.support.unit import TestCase, skipIf


class TestEnvironState(TestCase, LoaderModuleMockMixin):
    def setup_loader_modules(self):
        loader_globals = {
            "__env__": "base",
            "__opts__": {"test": False},
            "__salt__": {
                "environ.setenv": envmodule.setenv,
                "reg.read_value": salt.modules.reg.read_value,
            },
        }
        return {envstate: loader_globals, envmodule: loader_globals}

    def setUp(self):
        patcher = patch.dict(os.environ, {"INITIAL": "initial"}, clear=True)
        patcher.start()

        def reset_environ(patcher):
            patcher.stop()

        self.addCleanup(reset_environ, patcher)

    def test_setenv(self):
        """
        test that a subsequent calls of setenv changes nothing
        """
        ret = envstate.setenv("test", "value")
        self.assertEqual(ret["changes"], {"test": "value"})

        ret = envstate.setenv("test", "other")
        self.assertEqual(ret["changes"], {"test": "other"})

        # once again with the same value
        ret = envstate.setenv("test", "other")
        self.assertEqual(ret["changes"], {})

    @skipIf(not salt.utils.platform.is_windows(), "Windows only")
    def test_setenv_permanent(self):
        """
        test that we can set perminent environment variables (requires pywin32)
        """
        with patch.dict(
            envmodule.__salt__,
            {"reg.set_value": MagicMock(), "reg.delete_value": MagicMock()},
        ):
            ret = envstate.setenv("test", "value", permanent=True)
            self.assertEqual(ret["changes"], {"test": "value"})
            envmodule.__salt__["reg.set_value"].assert_called_with(
                "HKCU", "Environment", "test", "value"
            )

            ret = envstate.setenv("test", False, false_unsets=True, permanent=True)
            self.assertEqual(ret["changes"], {"test": None})
            envmodule.__salt__["reg.delete_value"].assert_called_with(
                "HKCU", "Environment", "test"
            )

    def test_setenv_dict(self):
        """
        test that setenv can be invoked with dict
        """
        ret = envstate.setenv("notimportant", {"test": "value"})
        self.assertEqual(ret["changes"], {"test": "value"})

    def test_setenv_int(self):
        """
        test that setenv can not be invoked with int
        (actually it's anything other than strings and dict)
        """
        ret = envstate.setenv("test", 1)
        self.assertEqual(ret["result"], False)

    def test_setenv_unset(self):
        """
        test that ``false_unsets`` option removes variable from environment
        """
        ret = envstate.setenv("test", "value")
        self.assertEqual(ret["changes"], {"test": "value"})

        ret = envstate.setenv("notimportant", {"test": False}, false_unsets=True)
        self.assertEqual(ret["changes"], {"test": None})
        self.assertEqual(envstate.os.environ, {"INITIAL": "initial"})

    def test_setenv_clearall(self):
        """
        test that ``clear_all`` option sets other values to ''
        """
        ret = envstate.setenv("test", "value", clear_all=True)
        self.assertEqual(ret["changes"], {"test": "value", "INITIAL": ""})
        if salt.utils.platform.is_windows():
            self.assertEqual(envstate.os.environ, {"TEST": "value", "INITIAL": ""})
        else:
            self.assertEqual(envstate.os.environ, {"test": "value", "INITIAL": ""})

    def test_setenv_clearall_with_unset(self):
        """
        test that ``clear_all`` option combined with ``false_unsets``
        unsets other values from environment
        """
        ret = envstate.setenv("test", "value", false_unsets=True, clear_all=True)
        self.assertEqual(ret["changes"], {"test": "value", "INITIAL": None})
        if salt.utils.platform.is_windows():
            self.assertEqual(envstate.os.environ, {"TEST": "value"})
        else:
            self.assertEqual(envstate.os.environ, {"test": "value"})

    def test_setenv_unset_multi(self):
        """
        test basically same things that above tests but with multiple values passed
        """
        ret = envstate.setenv("notimportant", {"foo": "bar"})
        self.assertEqual(ret["changes"], {"foo": "bar"})

        with patch.dict(envstate.__salt__, {"reg.read_value": MagicMock()}):
            ret = envstate.setenv(
                "notimportant", {"test": False, "foo": "baz"}, false_unsets=True
            )
        self.assertEqual(ret["changes"], {"test": None, "foo": "baz"})
        if salt.utils.platform.is_windows():
            self.assertEqual(envstate.os.environ, {"INITIAL": "initial", "FOO": "baz"})
        else:
            self.assertEqual(envstate.os.environ, {"INITIAL": "initial", "foo": "baz"})

        with patch.dict(envstate.__salt__, {"reg.read_value": MagicMock()}):
            ret = envstate.setenv("notimportant", {"test": False, "foo": "bax"})
        self.assertEqual(ret["changes"], {"test": "", "foo": "bax"})
        if salt.utils.platform.is_windows():
            self.assertEqual(
                envstate.os.environ, {"INITIAL": "initial", "FOO": "bax", "TEST": ""}
            )
        else:
            self.assertEqual(
                envstate.os.environ, {"INITIAL": "initial", "foo": "bax", "test": ""}
            )

    def test_setenv_test_mode(self):
        """
        test that imitating action returns good values
        """
        with patch.dict(envstate.__opts__, {"test": True}):
            ret = envstate.setenv("test", "value")
            self.assertEqual(ret["changes"], {"test": "value"})
            ret = envstate.setenv("INITIAL", "initial")
            self.assertEqual(ret["changes"], {})