# -*- 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 2018-2021 by it's authors.
# Some rights reserved, see README and LICENSE.

import json
from operator import itemgetter

import plone
import plone.protect
from bika.lims import FieldEditAnalysisResult
from bika.lims.api.security import check_permission
from Products.Archetypes.config import REFERENCE_CATALOG
from Products.CMFCore.utils import getToolByName
from Products.Five.browser import BrowserView
from senaite.core.p3compat import cmp


class AttachAnalyses(BrowserView):
    """ In attachment add form,
        the analyses dropdown combo uses this as source.
        Form is handled by the worksheet ManageResults code
    """
    def __init__(self, context, request):
        self.context = context
        self.request = request

    def __call__(self):
        plone.protect.CheckAuthenticator(self.request)
        searchTerm = 'searchTerm' in self.request and self.request['searchTerm'].lower() or ''
        page = self.request['page']
        nr_rows = self.request['rows']
        sord = self.request['sord']
        sidx = self.request['sidx']
        analysis_to_slot = {}
        for s in self.context.getLayout():
            analysis_to_slot[s['analysis_uid']] = int(s['position'])
        analyses = list(self.context.getAnalyses(full_objects=True))
        # Duplicates belong to the worksheet, so we must add them individually
        for i in self.context.objectValues():
            if i.portal_type == 'DuplicateAnalysis':
                analyses.append(i)
        rows = []
        for analysis in analyses:
            # Skip analyses that cannot be edited (attachment not permitted)
            if not check_permission(FieldEditAnalysisResult, analysis):
                continue
            parent = analysis.getParentTitle()
            rows.append({'analysis_uid': analysis.UID(),
                         'slot': analysis_to_slot[analysis.UID()],
                         'service': analysis.Title(),
                         'parent': parent,
                         'type': analysis.portal_type})

        # if there's a searchTerm supplied, restrict rows to those
        # who contain at least one field that starts with the chars from
        # searchTerm.
        if searchTerm:
            orig_rows = rows
            rows = []
            for row in orig_rows:
                matches = [v for v in row.values()
                           if str(v).lower().startswith(searchTerm)]
                if matches:
                    rows.append(row)

        rows = sorted(rows, cmp=lambda x, y: cmp(x, y), key=itemgetter(sidx and sidx or 'slot'))
        if sord == 'desc':
            rows.reverse()
        pages = len(rows) / int(nr_rows)
        pages += divmod(len(rows), int(nr_rows))[1] and 1 or 0
        start = (int(page)-1) * int(nr_rows)
        end = int(page) * int(nr_rows)
        ret = {'page': page,
               'total': pages,
               'records': len(rows),
               'rows': rows[start:end]}

        return json.dumps(ret)


class SetAnalyst(BrowserView):
    """The Analysis dropdown sets worksheet.Analyst immediately
    """

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

    def __call__(self):
        mtool = getToolByName(self, 'portal_membership')
        plone.protect.CheckAuthenticator(self.request)
        plone.protect.PostOnly(self.request)
        value = self.request.get('value', '')
        if not value:
            return
        if not mtool.getMemberById(value):
            return
        self.context.setAnalyst(value)


class SetInstrument(BrowserView):
    """The Instrument dropdown sets worksheet.Instrument immediately
    """

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

    def __call__(self):
        rc = getToolByName(self.context, REFERENCE_CATALOG)
        plone.protect.CheckAuthenticator(self.request)
        plone.protect.PostOnly(self.request)
        value = self.request.get('value', '')
        if not value:
            raise Exception("Invalid instrument")
        instrument = rc.lookupObject(value)
        if not instrument:
            raise Exception("Unable to lookup instrument")
        self.context.setInstrument(instrument)
