# This file is part of beets.
# Copyright 2016, Adrian Sampson.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
"""Tests for base utils from the beets.util package.
"""

import sys
import re
import os
import subprocess
import unittest

from unittest.mock import patch, Mock

from test import _common
from beets import util


class UtilTest(unittest.TestCase):
    def test_open_anything(self):
        with _common.system_mock('Windows'):
            self.assertEqual(util.open_anything(), 'start')

        with _common.system_mock('Darwin'):
            self.assertEqual(util.open_anything(), 'open')

        with _common.system_mock('Tagada'):
            self.assertEqual(util.open_anything(), 'xdg-open')

    @patch('os.execlp')
    @patch('beets.util.open_anything')
    def test_interactive_open(self, mock_open, mock_execlp):
        mock_open.return_value = 'tagada'
        util.interactive_open(['foo'], util.open_anything())
        mock_execlp.assert_called_once_with('tagada', 'tagada', 'foo')
        mock_execlp.reset_mock()

        util.interactive_open(['foo'], 'bar')
        mock_execlp.assert_called_once_with('bar', 'bar', 'foo')

    def test_sanitize_unix_replaces_leading_dot(self):
        with _common.platform_posix():
            p = util.sanitize_path('one/.two/three')
        self.assertFalse('.' in p)

    def test_sanitize_windows_replaces_trailing_dot(self):
        with _common.platform_windows():
            p = util.sanitize_path('one/two./three')
        self.assertFalse('.' in p)

    def test_sanitize_windows_replaces_illegal_chars(self):
        with _common.platform_windows():
            p = util.sanitize_path(':*?"<>|')
        self.assertFalse(':' in p)
        self.assertFalse('*' in p)
        self.assertFalse('?' in p)
        self.assertFalse('"' in p)
        self.assertFalse('<' in p)
        self.assertFalse('>' in p)
        self.assertFalse('|' in p)

    def test_sanitize_windows_replaces_trailing_space(self):
        with _common.platform_windows():
            p = util.sanitize_path('one/two /three')
        self.assertFalse(' ' in p)

    def test_sanitize_path_works_on_empty_string(self):
        with _common.platform_posix():
            p = util.sanitize_path('')
        self.assertEqual(p, '')

    def test_sanitize_with_custom_replace_overrides_built_in_sub(self):
        with _common.platform_posix():
            p = util.sanitize_path('a/.?/b', [
                (re.compile(r'foo'), 'bar'),
            ])
        self.assertEqual(p, 'a/.?/b')

    def test_sanitize_with_custom_replace_adds_replacements(self):
        with _common.platform_posix():
            p = util.sanitize_path('foo/bar', [
                (re.compile(r'foo'), 'bar'),
            ])
        self.assertEqual(p, 'bar/bar')

    @unittest.skip('unimplemented: #359')
    def test_sanitize_empty_component(self):
        with _common.platform_posix():
            p = util.sanitize_path('foo//bar', [
                (re.compile(r'^$'), '_'),
            ])
        self.assertEqual(p, 'foo/_/bar')

    def test_convert_command_args_keeps_undecodeable_bytes(self):
        arg = b'\x82'  # non-ascii bytes
        cmd_args = util.convert_command_args([arg])

        self.assertEqual(cmd_args[0],
                         arg.decode(util.arg_encoding(), 'surrogateescape'))

    @patch('beets.util.subprocess.Popen')
    def test_command_output(self, mock_popen):
        def popen_fail(*args, **kwargs):
            m = Mock(returncode=1)
            m.communicate.return_value = 'foo', 'bar'
            return m

        mock_popen.side_effect = popen_fail
        with self.assertRaises(subprocess.CalledProcessError) as exc_context:
            util.command_output(['taga', '\xc3\xa9'])
        self.assertEqual(exc_context.exception.returncode, 1)
        self.assertEqual(exc_context.exception.cmd, 'taga \xc3\xa9')


class PathConversionTest(_common.TestCase):
    def test_syspath_windows_format(self):
        with _common.platform_windows():
            path = os.path.join('a', 'b', 'c')
            outpath = util.syspath(path)
        self.assertTrue(isinstance(outpath, str))
        self.assertTrue(outpath.startswith('\\\\?\\'))

    def test_syspath_windows_format_unc_path(self):
        # The \\?\ prefix on Windows behaves differently with UNC
        # (network share) paths.
        path = '\\\\server\\share\\file.mp3'
        with _common.platform_windows():
            outpath = util.syspath(path)
        self.assertTrue(isinstance(outpath, str))
        self.assertEqual(outpath, '\\\\?\\UNC\\server\\share\\file.mp3')

    def test_syspath_posix_unchanged(self):
        with _common.platform_posix():
            path = os.path.join('a', 'b', 'c')
            outpath = util.syspath(path)
        self.assertEqual(path, outpath)

    def _windows_bytestring_path(self, path):
        old_gfse = sys.getfilesystemencoding
        sys.getfilesystemencoding = lambda: 'mbcs'
        try:
            with _common.platform_windows():
                return util.bytestring_path(path)
        finally:
            sys.getfilesystemencoding = old_gfse

    def test_bytestring_path_windows_encodes_utf8(self):
        path = 'caf\xe9'
        outpath = self._windows_bytestring_path(path)
        self.assertEqual(path, outpath.decode('utf-8'))

    def test_bytesting_path_windows_removes_magic_prefix(self):
        path = '\\\\?\\C:\\caf\xe9'
        outpath = self._windows_bytestring_path(path)
        self.assertEqual(outpath, 'C:\\caf\xe9'.encode())


class PathTruncationTest(_common.TestCase):
    def test_truncate_bytestring(self):
        with _common.platform_posix():
            p = util.truncate_path(b'abcde/fgh', 4)
        self.assertEqual(p, b'abcd/fgh')

    def test_truncate_unicode(self):
        with _common.platform_posix():
            p = util.truncate_path('abcde/fgh', 4)
        self.assertEqual(p, 'abcd/fgh')

    def test_truncate_preserves_extension(self):
        with _common.platform_posix():
            p = util.truncate_path('abcde/fgh.ext', 5)
        self.assertEqual(p, 'abcde/f.ext')


def suite():
    return unittest.TestLoader().loadTestsFromName(__name__)

if __name__ == '__main__':
    unittest.main(defaultTest='suite')
