# -*- coding: utf-8 -*-
#
# This file is part of SENAITE.CORE.
#
# SENAITE.CORE 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, version 2.
#
# 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., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Copyright 2018-2020 by it's authors.
# Some rights reserved, see README and LICENSE.

from bika.lims import api
from bika.lims import bikaMessageFactory as _
from bika.lims.idserver import get_config
from bika.lims.numbergenerator import INumberGenerator
from Products.Five import BrowserView
from Products.Five.browser.pagetemplatefile import ViewPageTemplateFile
from zope.component import getUtility
from zope.interface import Interface
from zope.interface import implements


class IIDserverView(Interface):
    """IDServerView
    """


class IDServerView(BrowserView):
    """ This browser view is to house ID Server related functions
    """
    implements(IIDserverView)
    template = ViewPageTemplateFile("templates/numbergenerator.pt")

    def __init__(self, context, request):
        super(BrowserView, self).__init__(context, request)
        self.context = context
        self.request = request

    def __call__(self):
        self.portal = api.get_portal()
        self.request.set("disable_plone.rightcolumn", 1)
        self.request.set("disable_border", 1)

        # Handle form submit
        form = self.request.form
        submitted = form.get("submitted", False)

        # nothing to do here
        if not submitted:
            return self.template()

        # Handle "Seed" action
        if form.get("seed", False):
            seeds = form.get("seeds", {})
            for key, value in seeds.items():
                value = api.to_int(value, None)
                message = ""
                if value is None:
                    message = _("Could not convert '{}' to an integer"
                                .format(value))
                elif value == 0:
                    del self.storage[key]
                    message = _("Removed key {} from storage".format(key))
                else:
                    self.set_seed(key, value)
                    message = _("Seeding key {} to {}".format(key, value))
                self.add_status_message(message, "info")

        return self.template()

    def get_id_template_for(self, key):
        """Get a preview of the next number
        """
        portal_type = key.split("-")[0]
        config = get_config(None, portal_type=portal_type)
        return config.get("form", "")

    @property
    def storage(self):
        number_generator = getUtility(INumberGenerator)
        return number_generator.storage

    def add_status_message(self, message, level="info"):
        """Set a portal status message
        """
        return self.context.plone_utils.addPortalMessage(message, level)

    def set_seed(self, key, value):
        """Set a number of the number generator
        """
        number_generator = getUtility(INumberGenerator)
        return number_generator.set_number(key, api.to_int(value))

    def seed(self):
        """ Reset the number from which the next generated sequence start.
            If you seed at 100, next seed will be 101
        """
        form = self.request.form
        prefix = form.get("prefix", None)
        if prefix is None:
            return "No prefix provided"
        seed = form.get("seed", None)
        if seed is None:
            return "No seed provided"
        if not seed.isdigit():
            return "Seed must be a digit"
        seed = int(seed)
        if seed < 0:
            return "Seed cannot be negative"

        new_seq = self.set_seed(prefix, seed)
        return 'IDServerView: "%s" seeded to %s' % (prefix, new_seq)
