from io import StringIO
import mock
import requests
import sys
from unittest import TestCase

from orm.orm_client.ormcli import imscli
from orm.orm_client.ormcli.imscli import cmd_data
from orm.orm_client.ormcli import ormcli


class ImsTests(TestCase):
    def setUp(self):
        out, sys.stdout, err, sys.stderr = sys.stdout, StringIO(), \
            sys.stderr, StringIO()
        self.mock_response = mock.Mock()

    def respond(self, value, code, headers={}):
        self.mock_response.json.return_value = value
        self.mock_response.status_code = code
        self.mock_response.headers = headers
        return self.mock_response

    def test_error_with_empty_args(self):
        with self.assertRaises(SystemExit) as cm:
            args = ormcli.main([])
        self.assertEqual(cm.exception.code, 2)
        sys.stderr.seek(0)
        output = sys.stderr.read()
        self.assertIn('too few arguments', output)

    def test_help_command(self):
        with self.assertRaises(SystemExit) as cm:
            args = ormcli.main('orm --help'.split())
        self.assertEqual(cm.exception.code, 0)
        sys.stdout.seek(0)
        output = sys.stdout.read()
        self.assertIn('usage:', output)
        self.assertIn('optional arguments:', output)
        self.assertIn('<service>', output)
        self.assertIn('ims', output)
        self.assertIn('Image Management', output)

    def test_ims_help_command(self):
        with self.assertRaises(SystemExit) as cm:
            args = ormcli.main('orm ims --help'.split())
        self.assertEqual(cm.exception.code, 0)
        sys.stdout.seek(0)
        output = sys.stdout.read()
        self.assertIn('usage:', output)
        self.assertIn('timeout', output)
        self.assertIn('optional arguments:', output)
        self.assertIn('orm ims', output)

    def test_cmd_details(self):
        # Set up the args parameter
        args = mock.MagicMock()
        args.imageid = 'test_imageid'
        args.region = 'test_region'
        args.visibility = 'test_visibility'
        args.customer = 'test_customer'
        args.force_delete is False
        list_images_url = '/?visibility=%s&region=%s&customer=%s'
        subcmd_to_result = {
            'create_image': (requests.post, '',),
            'update_image': (requests.put, '/%s' % args.imageid,),
            'delete_image': (requests.delete, '/%s' % args.imageid,),
            'enabled': (requests.put, '/%s/enabled' % args.imageid,),
            # 'disable': (requests.put, '/%s/enabled' % args.imageid,),
            'add_regions': (requests.post, '/%s/regions' % args.imageid,),
            'update_regions': (requests.put, '/%s/regions' % args.imageid,),
            'delete_region': (requests.delete, '/%s/regions/%s/%s'
                              % (args.imageid, args.regionid,
                                 args.force_delete),),
            'add_customers': (requests.post, '/%s/customers'
                              % args.imageid,),
            'update_customers': (requests.put, '/%s/customers'
                                 % args.imageid,),
            'delete_customer': (requests.delete, '/%s/customers/%s' % (
                                args.imageid, args.customerid),),
            'get_image': (requests.get, '/%s' % args.imageid,),
            'list_images': (requests.get, list_images_url
                            % (args.visibility, args.region,
                               args.customer))
        }

        # Assert that each subcommand returns the expected details
        for subcmd in subcmd_to_result:
            args.subcmd = subcmd
            self.assertEqual(subcmd_to_result[subcmd],
                             imscli.cmd_details(args))

    @mock.patch.object(imscli, 'cli_common')
    @mock.patch('requests.get')
    @mock.patch('requests.post')
    def test_list_images(self, mock_post, mock_get, mock_common):
        mock_post.return_value = self.respond(
            {"access": {"token": {"id": 989}}}, 201)
        cli = ormcli.Cli()
        cli.create_parser()
        cli.parse(
            'orm ims list_images client1 --visibility public --region a '
            '--customer b'.split())
        resp = self.respond({"access": {"token": {"id": 989}}}, 200)
        mock_get.return_value = self.respond(
            {"access": {"token": {"id": 989}}}, 200)

    @mock.patch.object(imscli, 'cli_common')
    @mock.patch.object(imscli, 'validate_args')
    @mock.patch.object(imscli.requests, 'post')
    @mock.patch.object(imscli.requests, 'get')
    @mock.patch.object(imscli.cli_common, 'get_token')
    @mock.patch.object(imscli, 'globals')
    def test_list_images_bad_request(self, mock_get_token, mock_globals,
                                     mock_post, mock_get, mock_validate_args, mock_common):
        mock_post.return_value = self.respond(
            {"access": {"token": {"id": 989}}}, 301)
        mock_post.__name__ = 'test'
        mock_get.__name__ = 'test'
        with self.assertRaises(SystemExit) as cm:
            args = ormcli.main('orm ims list_images b'.split())
        self.assertEqual(cm.exception.code, 1)
        sys.stdout.seek(0)
        output = sys.stdout.read()
        self.assertIn('API error', output)

    def test_cmd_data_no_data_file(self):
        my_args = mock.MagicMock()
        my_args.subcmd = 'xyz'

        my_args.datafile.read.return_value = "123"
        cm_data = cmd_data(my_args)
        self.assertEqual("{}", cm_data)

    def test_cmd_data_from_data_file(self):
        my_args = MyDataFile()
        cm_data = cmd_data(my_args)

        self.assertEqual("123", cm_data)


class MyDataFile(object):
    def __init__(self):
        self.subcmd = '1'
        self.datafile = FakeDataFIle()

    def __iter__(self):
        return iter(['datafile'])


class FakeDataFIle(object):
    def read(self):
        return '123'