# By: Riasat Ullah
# This file contains views for recent changes.

from constants import api_paths, label_names as lnm, pages, var_names
from constants import component_names as cnm
from context_manager import configurations_context
from django.core import exceptions
from django.http import JsonResponse
from django.shortcuts import redirect, render
from django.views.decorators.http import require_http_methods
from taskcallweb import settings
from system_tests.test_data import test_data_recent_changes
from translators import label_translator as lt
from utils import helpers
from validations import request_validator
import json


@require_http_methods(['GET', 'POST'])
def recent_changes_list(request):
    '''
    Returns the list of all services.
    :param request: Http request
    :return: Http response
    '''
    if request.method == 'GET':
        if request_validator.user_in_session(request):
            lang = request_validator.get_user_language(request)
            nav_bar_components = request_validator.get_nav_bar_components(request)

            has_view_perm, has_edit_perm = request_validator.get_session_permission(
                request, cnm.dis_com_recent_changes, nav_bar_components
            )
            if not has_view_perm:
                raise exceptions.PermissionDenied

            context = configurations_context.get_recent_changes_context(lang, nav_bar_components)
            context[var_names.has_team_permission] = request_validator.get_team_permission_status(request)
            context[var_names.has_edit_permission] = has_edit_perm
            return render(request, pages.recent_changes_list_page, context=context)
        else:
            helpers.set_session_redirect_page(request)
            return redirect(pages.login_url)
    elif request.method == 'POST':
        lang = request_validator.get_user_language(request)
        if request_validator.user_in_session(request):
            body = json.loads(request.body.decode())
            if settings.TEST_MODE:
                if var_names.instance_id in body:
                    dt = [test_data_recent_changes.recent_changes[0], test_data_recent_changes.recent_changes[2]]
                else:
                    dt = test_data_recent_changes.recent_changes
                return JsonResponse(dt, safe=False)
            else:
                status, output = helpers.post_api_request(api_paths.recent_changes_list, body, request, lang=lang)
                return JsonResponse(output, status=status, safe=False)
        else:
            return JsonResponse(lt.get_label(lnm.err_unauthorized_access, lang), status=401, safe=False)


@require_http_methods(['POST'])
def redact_change_event(request):
    '''
    Redact change event.
    :param request: Http request
    :return: JSON response
    '''
    if request.method == 'POST':
        lang = request_validator.get_user_language(request)
        if request_validator.user_in_session(request):
            nav_bar_components = request_validator.get_nav_bar_components(request)
            has_view_perm, has_edit_perm = request_validator.get_session_permission(
                request, cnm.dis_com_recent_changes, nav_bar_components
            )
            if not has_edit_perm:
                raise exceptions.PermissionDenied

            body = json.loads(request.body.decode())
            if settings.TEST_MODE:
                return JsonResponse('Change event has been redacted', safe=False)
            else:
                status, output = helpers.post_api_request(api_paths.recent_changes_redact, body, request, lang=lang)
                return JsonResponse(output, status=status, safe=False)
        else:
            return JsonResponse(lt.get_label(lnm.err_unauthorized_access, lang), status=401, safe=False)