# -*- mode: python -*-
# -*- coding: utf-8 -*-

##############################################################################
#
# Gestion scolarite IUT
#
# Copyright (c) 1999 - 2023 Emmanuel Viennet.  All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
#   Emmanuel Viennet      emmanuel.viennet@viennet.net
#
##############################################################################

"""Accès aux emplois du temps

XXX usage uniquement experimental pour tests implémentations

XXX incompatible avec les ics HyperPlanning Paris 13 (était pour GPU).

"""

import icalendar

import urllib

import app.scodoc.sco_utils as scu
from app import log
from app.scodoc import sco_formsemestre
from app.scodoc import sco_groups
from app.scodoc import sco_preferences


def formsemestre_get_ics_url(sem):
    """
    edt_sem_ics_url est un template
    utilisé avec .format(sem=sem)
    Par exemple:
    https://example.fr/agenda/{sem[etapes][0]}
    """
    ics_url_tmpl = sco_preferences.get_preference(
        "edt_sem_ics_url", sem["formsemestre_id"]
    )
    if not ics_url_tmpl:
        return None
    try:
        ics_url = ics_url_tmpl.format(sem=sem)
    except:
        log(
            f"""Exception in formsemestre_get_ics_url(formsemestre_id={sem["formsemestre_id"]})
            ics_url_tmpl='{ics_url_tmpl}'
            """
        )
        log(traceback.format_exc())
        return None
    return ics_url


def formsemestre_load_ics(sem):
    """Load ics data, from our cache or, when necessary, from external provider"""
    # TODO: cacher le résultat
    ics_url = formsemestre_get_ics_url(sem)
    if not ics_url:
        ics_data = ""
    else:
        log(f"Loading edt from {ics_url}")
        # 5s TODO: add config parameter, eg for slow networks
        f = urllib.request.urlopen(ics_url, timeout=5)
        ics_data = f.read()
        f.close()

    cal = icalendar.Calendar.from_ical(ics_data)
    return cal


def get_edt_transcodage_groups(formsemestre_id):
    """-> { nom_groupe_edt : nom_groupe_scodoc }"""
    # TODO: valider ces données au moment où on enregistre les préférences
    edt2sco = {}
    sco2edt = {}
    msg = ""  # message erreur, '' si ok
    txt = sco_preferences.get_preference("edt_groups2scodoc", formsemestre_id)
    if not txt:
        return edt2sco, sco2edt, msg

    line_num = 1
    for line in txt.split("\n"):
        fs = [s.strip() for s in line.split(";")]
        if len(fs) == 1:  # groupe 'tous'
            edt2sco[fs[0]] = None
            sco2edt[None] = fs[0]
        elif len(fs) == 2:
            edt2sco[fs[0]] = fs[1]
            sco2edt[fs[1]] = fs[0]
        else:
            msg = f"ligne {line_num} invalide"
        line_num += 1

    log(f"sco2edt={pprint.pformat(sco2edt)}")
    return edt2sco, sco2edt, msg


def group_edt_json(group_id, start="", end=""):  # actuellement inutilisé
    """EDT complet du semestre, au format JSON
    TODO: indiquer un groupe
    TODO: utiliser start et end (2 dates au format ISO YYYY-MM-DD)
    TODO: cacher
    """
    group = sco_groups.get_group(group_id)
    sem = sco_formsemestre.get_formsemestre(group["formsemestre_id"])
    edt2sco, sco2edt, msg = get_edt_transcodage_groups(group["formsemestre_id"])

    edt_group_name = sco2edt.get(group["group_name"], group["group_name"])
    log("group scodoc=%s : edt=%s" % (group["group_name"], edt_group_name))

    cal = formsemestre_load_ics(sem)
    events = [e for e in cal.walk() if e.name == "VEVENT"]
    J = []
    for e in events:
        # if e['X-GROUP-ID'].strip() == edt_group_name:
        if "DESCRIPTION" in e:
            d = {
                "title": e.decoded("DESCRIPTION"),  # + '/' + e['X-GROUP-ID'],
                "start": e.decoded("dtstart").isoformat(),
                "end": e.decoded("dtend").isoformat(),
            }
            J.append(d)

    return scu.sendJSON(J)


# def experimental_calendar(group_id=None, formsemestre_id=None):  # inutilisé
#     """experimental page"""
#     return "\n".join(
#         [
#             html_sco_header.sco_header(
#                 javascripts=[
#                     "libjs/purl.js",
#                     "libjs/moment.min.js",
#                     "libjs/fullcalendar/fullcalendar.min.js",
#                 ],
#                 cssstyles=[
#                     #                'libjs/bootstrap-3.1.1-dist/css/bootstrap.min.css',
#                     #                'libjs/bootstrap-3.1.1-dist/css/bootstrap-theme.min.css',
#                     #                'libjs/bootstrap-multiselect/bootstrap-multiselect.css'
#                     "libjs/fullcalendar/fullcalendar.css",
#                     # media='print' 'libjs/fullcalendar/fullcalendar.print.css'
#                 ],
#             ),
#             """<style>
#         #loading {
#         display: none;
#         position: absolute;
#         top: 10px;
#         right: 10px;
#         }
#         </style>
#         """,
#             """<form id="group_selector" method="get">
#         <span style="font-weight: bold; font-size:120%">Emplois du temps du groupe</span>""",
#             sco_groups_view.menu_group_choice(
#                 group_id=group_id, formsemestre_id=formsemestre_id
#             ),
#             """</form><div id="loading">loading...</div>
#         <div id="calendar"></div>
#         """,
#             html_sco_header.sco_footer(),
#             """<script>
# $(document).ready(function() {

# var group_id = $.url().param()['group_id'];

# $('#calendar').fullCalendar({
#   events: {
#     url: 'group_edt_json?group_id=' + group_id,
#     error: function() {
#       $('#script-warning').show();
#     }
#    },
#   timeFormat: 'HH:mm',
#   timezone: 'local', // heure locale du client
#   loading: function(bool) {
#     $('#loading').toggle(bool);
#   }
# });
# });
# </script>
#         """,
#         ]
#     )