from __future__ import unicode_literals
from __future__ import absolute_import
import logging
import os
import tempfile
import shutil
from .. import unittest

import mock

from compose.cli import main
from compose.cli.main import TopLevelCommand
from compose.cli.errors import ComposeFileNotFound
from six import StringIO


class CLITestCase(unittest.TestCase):
    def test_default_project_name(self):
        cwd = os.getcwd()

        try:
            os.chdir('tests/fixtures/simple-composefile')
            command = TopLevelCommand()
            project_name = command.get_project_name(command.get_config_path())
            self.assertEquals('simplecomposefile', project_name)
        finally:
            os.chdir(cwd)

    def test_project_name_with_explicit_base_dir(self):
        command = TopLevelCommand()
        command.base_dir = 'tests/fixtures/simple-composefile'
        project_name = command.get_project_name(command.get_config_path())
        self.assertEquals('simplecomposefile', project_name)

    def test_project_name_with_explicit_uppercase_base_dir(self):
        command = TopLevelCommand()
        command.base_dir = 'tests/fixtures/UpperCaseDir'
        project_name = command.get_project_name(command.get_config_path())
        self.assertEquals('uppercasedir', project_name)

    def test_project_name_with_explicit_project_name(self):
        command = TopLevelCommand()
        name = 'explicit-project-name'
        project_name = command.get_project_name(None, project_name=name)
        self.assertEquals('explicitprojectname', project_name)

    def test_project_name_from_environment_old_var(self):
        command = TopLevelCommand()
        name = 'namefromenv'
        with mock.patch.dict(os.environ):
            os.environ['FIG_PROJECT_NAME'] = name
            project_name = command.get_project_name(None)
        self.assertEquals(project_name, name)

    def test_project_name_from_environment_new_var(self):
        command = TopLevelCommand()
        name = 'namefromenv'
        with mock.patch.dict(os.environ):
            os.environ['COMPOSE_PROJECT_NAME'] = name
            project_name = command.get_project_name(None)
        self.assertEquals(project_name, name)

    def test_filename_check(self):
        self.assertEqual('docker-compose.yml', get_config_filename_for_files([
            'docker-compose.yml',
            'docker-compose.yaml',
            'fig.yml',
            'fig.yaml',
        ]))

        self.assertEqual('docker-compose.yaml', get_config_filename_for_files([
            'docker-compose.yaml',
            'fig.yml',
            'fig.yaml',
        ]))

        self.assertEqual('fig.yml', get_config_filename_for_files([
            'fig.yml',
            'fig.yaml',
        ]))

        self.assertEqual('fig.yaml', get_config_filename_for_files([
            'fig.yaml',
        ]))

        self.assertRaises(ComposeFileNotFound, lambda: get_config_filename_for_files([]))

    def test_get_project(self):
        command = TopLevelCommand()
        command.base_dir = 'tests/fixtures/longer-filename-composefile'
        project = command.get_project(command.get_config_path())
        self.assertEqual(project.name, 'longerfilenamecomposefile')
        self.assertTrue(project.client)
        self.assertTrue(project.services)

    def test_help(self):
        command = TopLevelCommand()
        with self.assertRaises(SystemExit):
            command.dispatch(['-h'], None)

    def test_setup_logging(self):
        main.setup_logging()
        self.assertEqual(logging.getLogger().level, logging.DEBUG)
        self.assertEqual(logging.getLogger('requests').propagate, False)


def get_config_filename_for_files(filenames):
    project_dir = tempfile.mkdtemp()
    try:
        make_files(project_dir, filenames)
        command = TopLevelCommand()
        command.base_dir = project_dir
        return os.path.basename(command.get_config_path())
    finally:
        shutil.rmtree(project_dir)


def make_files(dirname, filenames):
    for fname in filenames:
        with open(os.path.join(dirname, fname), 'w') as f:
            f.write('')