# -*- 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 2018-2019 by it's authors.
# Some rights reserved, see README and LICENSE.

"""Bika's browser views are based on this one, for a nice set of utilities.
"""
import traceback
from datetime import datetime
from time import strptime

from AccessControl import ClassSecurityInfo
from DateTime.DateTime import DateTime, safelocaltime
from Products.ATContentTypes.utils import dt2DT
from Products.CMFCore.utils import getToolByName
from Products.CMFPlone.i18nl10n import ulocalized_time as _ut
from Products.Five.browser import BrowserView as BaseBrowserView
from bika.lims import logger
from zope.cachedescriptors.property import Lazy as lazy_property
from zope.i18n import translate


def get_date(context, value):
    """Tries to return a DateTime.DateTime object
    """
    if not value:
        return None
    if isinstance(value, DateTime):
        return value
    if isinstance(value, datetime):
        return dt2DT(value)
    if not isinstance(value, basestring):
        return None

    def try_parse(date_string, format):
        if not format:
            return None
        try:
            struct_time = strptime(date_string, format)
            return datetime(*struct_time[:6])
        except ValueError:
            pass
        return None

    def get_locale_format(key, context):
        format = context.translate(key, domain="senaite.core", mapping={})
        # TODO: Is this replacement below strictly necessary?
        return format.replace(r"${", '%').replace('}', '')

    # Try with prioritized formats
    formats = [get_locale_format("date_format_long", context),
               get_locale_format("date_format_short", context),
               "%Y-%m-%d %H:%M", "%Y-%m-%d", "%Y-%m-%d %H:%M:%S"]
    for pri_format in formats:
        val = try_parse(value, pri_format)
        if not val:
            continue
        val = dt2DT(val)
        if val.timezoneNaive():
            # Use local timezone for tz naive strings
            # see http://dev.plone.org/plone/ticket/10141
            zone = val.localZone(safelocaltime(val.timeTime()))
            parts = val.parts()[:-1] + (zone,)
            val = DateTime(*parts)
        return val

    logger.warn("Unable to convert {} to datetime".format(value))
    return None


def ulocalized_time(time, long_format=None, time_only=None, context=None,
                    request=None):
    """
    This function gets ans string as time or a DateTime objects and returns a
    string with the time formatted

    :param time: The time to process
    :type time: str/DateTime
    :param long_format:  If True, return time in ling format
    :type portal_type: boolean/null
    :param time_only: If True, only returns time.
    :type title: boolean/null
    :param context: The current context
    :type context: ATContentType
    :param request: The current request
    :type request: HTTPRequest object
    :returns: The formatted date as string
    :rtype: string
    """
    # if time is a string, we'll try pass it through strptime with the various
    # formats defined.
    time = get_date(context, time)
    if not time or not isinstance(time, DateTime):
        return ''

    # no printing times if they were not specified in inputs
    if time.second() + time.minute() + time.hour() == 0:
        long_format = False
    try:
        time_str = _ut(time, long_format, time_only, context, 'senaite.core', request)
    except ValueError:
        err_msg = traceback.format_exc() + '\n'
        logger.warn(
            err_msg + '\n' +
            "Error converting '{}' time to string in {}."
            .format(time, context))
        time_str = ''
    return time_str



class BrowserView(BaseBrowserView):
    security = ClassSecurityInfo()

    logger = logger

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

    security.declarePublic('ulocalized_time')

    def ulocalized_time(self, time, long_format=None, time_only=None):
        return ulocalized_time(time, long_format, time_only,
                               context=self.context, request=self.request)

    @lazy_property
    def portal(self):
        return getToolByName(self.context, 'portal_url').getPortalObject()

    @lazy_property
    def portal_url(self):
        return self.portal.absolute_url().split("?")[0]

    @lazy_property
    def portal_catalog(self):
        return getToolByName(self.context, 'portal_catalog')

    @lazy_property
    def reference_catalog(self):
        return getToolByName(self.context, 'reference_catalog')

    @lazy_property
    def bika_analysis_catalog(self):
        return getToolByName(self.context, 'bika_analysis_catalog')

    @lazy_property
    def bika_setup_catalog(self):
        return getToolByName(self.context, 'bika_setup_catalog')

    @lazy_property
    def bika_catalog(self):
        return getToolByName(self.context, 'bika_catalog')

    @lazy_property
    def portal_membership(self):
        return getToolByName(self.context, 'portal_membership')

    @lazy_property
    def portal_groups(self):
        return getToolByName(self.context, 'portal_groups')

    @lazy_property
    def portal_workflow(self):
        return getToolByName(self.context, 'portal_workflow')

    @lazy_property
    def checkPermission(self, perm, obj):
        return self.portal_membership.checkPermission(perm, obj)

    # TODO: user_fullname is deprecated and will be removed in Bika LIMS 3.3.
    # Use bika.utils.user_fullnameinstead
    # I was having a problem trying to import the function from bika.lims.utils
    # so i copied the code here.
    def user_fullname(self, userid):
        member = self.portal_membership.getMemberById(userid)
        if member is None:
            return userid
        member_fullname = member.getProperty('fullname')
        portal_catalog = getToolByName(self, 'portal_catalog')
        c = portal_catalog(portal_type='Contact', getUsername=userid)
        contact_fullname = c[0].getObject().getFullname() if c else None
        return contact_fullname or member_fullname or userid

    # TODO: user_fullname is deprecated and will be removed in Bika LIMS 3.3.
    # Use bika.utils.user_fullnameinstead.
    # I was having a problem trying to import the function from bika.lims.utils
    # so i copied the code here.
    def user_email(self, userid):
        member = self.portal_membership.getMemberById(userid)
        if member is None:
            return userid
        member_email = member.getProperty('email')
        portal_catalog = getToolByName(self, 'portal_catalog')
        c = portal_catalog(portal_type='Contact', getUsername=userid)
        contact_email = c[0].getObject().getEmailAddress() if c else None
        return contact_email or member_email or ''

    def python_date_format(self, long_format=None, time_only=False):
        """This convert bika domain date format msgstrs to Python
        strftime format strings, by the same rules as ulocalized_time.
        XXX i18nl10n.py may change, and that is where this code is taken from.
        """
        # get msgid
        msgid = long_format and 'date_format_long' or 'date_format_short'
        if time_only:
            msgid = 'time_format'
        # get the formatstring
        formatstring = translate(msgid, domain="senaite.core",
                                 context=self.request)

        if formatstring is None or formatstring.startswith(
                'date_') or formatstring.startswith('time_'):
            self.logger.error("bika/%s/%s could not be translated" %
                              (self.request.get('LANGUAGE'), msgid))
            # msg catalog was not able to translate this msgids
            # use default setting
            properties = getToolByName(self.context,
                                       'portal_properties').site_properties
            if long_format:
                format = properties.localLongTimeFormat
            else:
                if time_only:
                    format = properties.localTimeOnlyFormat
                else:
                    format = properties.localTimeFormat
            return format
        return formatstring.replace(r"${", '%').replace('}', '')

    @lazy_property
    def date_format_long(self):
        fmt = self.python_date_format(long_format=1)
        if fmt == "date_format_long":
            fmt = "%Y-%m-%d %I:%M %p"
        return fmt

    @lazy_property
    def date_format_short(self):
        fmt = self.python_date_format()
        if fmt == "date_format_short":
            fmt = "%Y-%m-%d"
        return fmt

    @lazy_property
    def time_format(self):
        fmt = self.python_date_format(time_only=True)
        if fmt == "time_format":
            fmt = "%I:%M %p"
        return fmt
