from flask import Response, request
from io import BytesIO
import xml.etree.ElementTree

from fHDHR.tools import channel_sort, sub_el


class Lineup_XML():
    endpoints = ["/hdhr/lineup.xml"]
    endpoint_name = "hdhr_lineup_xml"

    def __init__(self, fhdhr):
        self.fhdhr = fhdhr

    @property
    def source(self):
        return self.fhdhr.config.dict["hdhr"]["source"] or self.fhdhr.origins.valid_origins[0]

    def __call__(self, *args):
        return self.get(*args)

    def get(self, *args):

        base_url = request.url_root[:-1]

        show = request.args.get('show', default="all", type=str)

        origin = self.source

        channelslist = {}
        sorted_chan_guide = []
        for fhdhr_id in [x["id"] for x in self.fhdhr.device.channels.get_channels(origin)]:
            channel_obj = self.fhdhr.device.channels.get_channel_obj("id", fhdhr_id, origin)
            if channel_obj.enabled:
                channelslist[channel_obj.number] = channel_obj

        # Sort the channels
        sorted_channel_list = channel_sort(list(channelslist.keys()))
        for channel in sorted_channel_list:

            channel_obj = channelslist[channel]
            lineup_dict = {
                             'GuideNumber': channel_obj.number,
                             'GuideName': channel_obj.dict['name'],
                             'Tags': ",".join(channel_obj.dict['tags']),
                             'URL': '/hdhr/auto/v' % channel_obj.number,
                             'HD': channel_obj.dict["HD"],
                             "Favorite": channel_obj.dict["favorite"],
                            }
            lineup_dict["URL"] = "%s%s" % (base_url, lineup_dict["URL"])
            if show == "found" and channel_obj.enabled:
                lineup_dict["Enabled"] = 1
            elif show == "found" and not channel_obj.enabled:
                lineup_dict["Enabled"] = 0

            sorted_chan_guide.append(lineup_dict)

        out = xml.etree.ElementTree.Element('Lineup')
        for lineup_dict in sorted_chan_guide:
            program_out = sub_el(out, 'Program')
            for key in list(lineup_dict.keys()):
                sub_el(program_out, str(key), str(lineup_dict[key]))

        fakefile = BytesIO()
        fakefile.write(b'<?xml version="1.0" encoding="UTF-8"?>\n')
        fakefile.write(xml.etree.ElementTree.tostring(out, encoding='UTF-8'))
        lineup_xml = fakefile.getvalue()

        return Response(status=200,
                        response=lineup_xml,
                        mimetype='application/xml')