from __future__ import unicode_literals

import sys

from .common import InfoExtractor
from ..utils import ExtractorError


class CommonMistakesIE(InfoExtractor):
    IE_DESC = False  # Do not list
    _VALID_URL = r"""(?x)
        (?:url|URL)$
    """

    _TESTS = [
        {
            "url": "url",
            "only_matching": True,
        },
        {
            "url": "URL",
            "only_matching": True,
        },
    ]

    def _real_extract(self, url):
        msg = (
            'You\'ve asked youtube-dl to download the URL "%s". '
            "That doesn't make any sense. "
            "Simply remove the parameter in your command or configuration."
        ) % url
        if not self._downloader.params.get("verbose"):
            msg += " Add -v to the command line to see what arguments and configuration youtube-dl got."
        raise ExtractorError(msg, expected=True)


class UnicodeBOMIE(InfoExtractor):
    IE_DESC = False
    _VALID_URL = r"(?P<bom>\ufeff)(?P<id>.*)$"

    # Disable test for python 3.2 since BOM is broken in re in this version
    # (see https://github.com/ytdl-org/youtube-dl/issues/9751)
    _TESTS = (
        []
        if (3, 0) < sys.version_info <= (3, 3)
        else [
            {
                "url": "\ufeffhttp://www.youtube.com/watch?v=BaW_jenozKc",
                "only_matching": True,
            }
        ]
    )

    def _real_extract(self, url):
        real_url = self._match_id(url)
        self.report_warning(
            "Your URL starts with a Byte Order Mark (BOM). "
            'Removing the BOM and looking for "%s" ...' % real_url
        )
        return self.url_result(real_url)
