# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
from __future__ import absolute_import
import sys
import logging
import re
import unicodedata

try:
    import HTMLParser
except ImportError:
    # pylint: disable-msg=import-error
    import html.parser as HTMLParser

is_py2 = (sys.version_info[0] == 2)
is_py3 = (sys.version_info[0] == 3)
is_py2_old = (sys.version_info < (2, 7))

# Used for UA spoofing in get_http_data()
FIREFOX_UA = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3'

log = logging.getLogger('svtplay_dl')
progress_stream = sys.stderr

try:
    from requests import Session
except ImportError:
    print("You need to install python-requests to use this script")
    sys.exit(3)


class HTTP(Session):
    def __init__(self, *args, **kwargs):
        Session.__init__(self, *args, **kwargs)

    def check_redirect(self, url):
        return self.get(url, stream=True).url

    def request(self, method, url, *args, **kwargs):
        log.debug("HTTP getting %r", url)
        res = Session.request(self, method, url, **kwargs)
        return res


def sort_quality(data):
    data = sorted(data, key=lambda x: (x.bitrate, x.name()), reverse=True)
    datas = []
    for i in data:
        datas.append([i.bitrate, i.name()])
    return datas


def list_quality(videos):
    data = sort_quality(videos)
    log.info("Quality\tMethod")
    for i in data:
        log.info("%s\t%s" % (i[0], i[1].upper()))


def select_quality(options, streams):
    available = sorted(int(x.bitrate) for x in streams)
    try:
        optq = int(options.quality)
    except ValueError:
        log.error("Requested quality need to be a number")
        sys.exit(4)
    if optq:
        try:
            optf = int(options.flexibleq)
        except ValueError:
            log.error("Flexible-quality need to be a number")
            sys.exit(4)
        if not optf:
            wanted = [optq]
        else:
            wanted = range(optq-optf, optq+optf+1)
    else:
        wanted = [available[-1]]

    selected = None
    for q in available:
        if q in wanted:
            selected = q
            break
    if not selected and selected != 0:
        data = sort_quality(streams)
        quality = ", ".join("%s (%s)" % (str(x), str(y)) for x, y in data)
        log.error("Can't find that quality. Try one of: %s (or try --flexible-quality)", quality)

        sys.exit(4)
    for i in streams:
        if int(i.bitrate) == selected:
            stream = i
    return stream


def ensure_unicode(s):
    """
    Ensure string is a unicode string. If it isn't it assumed it is
    utf-8 and decodes it to a unicode string.
    """
    if (is_py2 and isinstance(s, str)) or (is_py3 and isinstance(s, bytes)):
        s = s.decode('utf-8', 'replace')
    return s


def decode_html_entities(s):
    """
    Replaces html entities with the character they represent.

        >>> print(decode_html_entities("&lt;3 &amp;"))
        <3 &
    """
    parser = HTMLParser.HTMLParser()
    def unesc(m):
        return parser.unescape(m.group())
    return re.sub(r'(&[^;]+;)', unesc, ensure_unicode(s))


def filenamify(title):
    """
    Convert a string to something suitable as a file name.

        >>> print(filenamify(u'Matlagning del 1 av 10 - R\xe4ksm\xf6rg\xe5s | SVT Play'))
        matlagning-del-1-av-10-raksmorgas-svt-play

    """
    # ensure it is unicode
    title = ensure_unicode(title)

    # NFD decomposes chars into base char and diacritical mark, which means that we will get base char when we strip out non-ascii.
    title = unicodedata.normalize('NFD', title)

    # Drop any non ascii letters/digits
    title = re.sub(r'[^a-zA-Z0-9 -.]', '', title)
    # Drop any leading/trailing whitespace that may have appeared
    title = title.strip()
    # Lowercase
    title = title.lower()
    # Replace whitespace with dash
    title = re.sub(r'[-\s]+', '-', title)

    return title


def download_thumbnail(options, url):
    data = Session.get(url).content

    filename = re.search(r"(.*)\.[a-z0-9]{2,3}$", options.output)
    tbn = "%s.tbn" % filename.group(1)
    log.info("Thumbnail: %s", tbn)

    fd = open(tbn, "wb")
    fd.write(data)
    fd.close()
