import json

from django.contrib import messages
from django.utils.safestring import mark_safe
from django.shortcuts import render, redirect, get_object_or_404, HttpResponse
from django.contrib.auth.decorators import login_required

from apps.main.models import Experiment, Device
from apps.main.views import sidebar

from .models import GeneratorConfiguration
from .forms import GeneratorConfigurationForm, GeneratorImportForm

def is_developer(user):
    groups = [str(g.name) for g in user.groups.all()]
    #return 'Developer' in groups or user.is_staff
    return 'Developer' in groups or user.is_superuser


def is_operator(user):
    groups = [str(g.name) for g in user.groups.all()]
    #return 'Operator' in groups or user.is_staff
    return 'Operator' in groups or user.is_superuser


def conf(request, conf_id):

    conf = get_object_or_404(GeneratorConfiguration, pk=conf_id)

    kwargs = {}
    kwargs['dev_conf'] = conf
    
    if conf.enable_2:
        kwargs['dev_conf_keys'] = ['delay', 'periode_1', 'width_1', 'ntx_1', 'periode_2', 'width_2', 'ntx_2', 'selector']
    else:
        kwargs['dev_conf_keys'] = ['delay', 'periode_1', 'width_1', 'ntx_1', 'selector']

    kwargs['title'] = 'Configuration'
    kwargs['suptitle'] = 'Detail'

    kwargs['button'] = 'Edit Configuration'

    conf.status_device()

    ###### SIDEBAR ######
    kwargs.update(sidebar(conf=conf))

    return render(request, 'generator_conf.html', kwargs)

@login_required
def conf_edit(request, conf_id):

    conf = get_object_or_404(GeneratorConfiguration, pk=conf_id)
    
    if not is_developer(request.user):
        messages.error(request, 'You must be an developer to edit this configuration')
        return redirect(conf.get_absolute_url())
    
    if request.method=='GET':
    
        form = GeneratorConfigurationForm(instance=conf)
    
    elif request.method=='POST':
        
        form = GeneratorConfigurationForm(request.POST, instance=conf)

        if form.is_valid():
            form.save()

            messages.success(request, 'Generator configuration successfully updated')

            return redirect(conf.get_absolute_url())

    kwargs = {}
    kwargs['dev_conf'] = conf
    kwargs['form'] = form
    kwargs['edit'] = True

    kwargs['title'] = 'Generator Configuration'
    kwargs['suptitle'] = 'Edit'
    kwargs['button'] = 'Update'

    return render(request, 'generator_conf_edit.html', kwargs)

def import_file(request, conf_id):

    conf = get_object_or_404(GeneratorConfiguration, pk=conf_id)
    if request.method=='POST':
        form = GeneratorImportForm(request.POST, request.FILES)
        if form.is_valid():
            try:
                data = conf.import_from_file(request.FILES['file_name'])
                conf.dict_to_parms(data)
                messages.success(request, 'Configuration "%s" loaded succesfully' % request.FILES['file_name'])
                return redirect(conf.get_absolute_url_edit())

            except Exception as e:
                messages.error(request, 'Error parsing file: "%s" - %s' % (request.FILES['file_name'], repr(e)))
    else:
        messages.warning(request, 'Your current configuration will be replaced')
        form = GeneratorImportForm()

    kwargs = {}
    kwargs['form'] = form
    kwargs['title'] = 'Generator Configuration'
    kwargs['suptitle'] = 'Import file'
    kwargs['button'] = 'Upload'
    kwargs['previous'] = conf.get_absolute_url()

    return render(request, 'generator_import.html', kwargs)

def conf_raw(request, conf_id):
    conf = get_object_or_404(GeneratorConfiguration, pk=conf_id)
    raw = conf.write_device(raw=True)
    return HttpResponse(raw, content_type='application/json')