import unittest
import icalevents.icaldownload
import os
import logging


class ICalDownloadTests(unittest.TestCase):

    def test_apple_data_fix(self):
        data = """
DTSTART:18831118T120702
RDATE;VALUE=DATE-TIME:18831118T120702
TZNAME:PST
TZOFFSETFROM:+5328
TZOFFSETTO:-0800
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:19180331T020000
        """
        expected = """
DTSTART:18831118T120702
RDATE;VALUE=DATE-TIME:18831118T120702
TZNAME:PST
TZOFFSETFROM:+0053
TZOFFSETTO:-0800
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:19180331T020000
        """
        res = icalevents.icaldownload.apple_data_fix(data)
        self.assertEqual(res, expected, "fix invalid TZOFFSETFROM")

    def test_apple_url_fix(self):
        data = "webcal://blah.blub/webcal/"
        expected = "http://blah.blub/webcal/"

        res = icalevents.icaldownload.apple_url_fix(data)
        self.assertEqual(res, expected, "fix url protocol")

    def test_apple_url_fix_right(self):
        data = "https://blah.blub/webcal/"

        res = icalevents.icaldownload.apple_url_fix(data)
        self.assertEqual(res, data, "no change")

    def test_data_from_file_google(self):
        file = "test/test_data/basic.ics"
        result = "test/test_data/basic_content.txt"

        expected = None

        with open(result, mode='r', encoding='utf-8') as f:
            expected = f.read()

        content = icalevents.icaldownload.ICalDownload().data_from_file(file)

        self.assertEqual(expected, content, "content form iCal file, google format")

    def test_data_from_file_apple(self):
        file = "test/test_data/icloud.ics"
        result = "test/test_data/icloud_content.txt"

        expected = None

        with open(result, mode='r', encoding='utf-8') as f:
            expected = f.read()

        content = icalevents.icaldownload.ICalDownload().data_from_file(file, apple_fix=True)

        self.assertEqual(expected, content, "content form iCal file, google format")

    def test_read_only_directory(self):
        # Switch to new directory so we can perform os.chmod()
        os.mkdir("tmp")
        os.chdir("tmp")

        # Save current directory permissions
        oldPerms = os.stat(os.getcwd()).st_mode
        # Set working directory as read-only
        os.chmod(os.getcwd(), 0o500)

        # Assert log message is being thrown
        logger = logging.getLogger()
        try:
            with self.assertLogs(level="WARNING") as cm:
                # Create new ICalDownload instance which will try to create the .cache directory
                ical_download = icalevents.icaldownload.ICalDownload(http=None)
        finally:
            # Change directory back to old permissions
            print(oldPerms)
            os.chmod(os.getcwd(), oldPerms)

            print(os.stat(os.getcwd()))

            # Delete tmp dir
            os.chdir("..")
            os.remove("tmp")