from django.views.generic.edit import UpdateView
from django.views.generic import ListView
from musicians.models import Musician 
from django import forms
from django.http import HttpResponseRedirect
from django.shortcuts import render
from django.shortcuts import get_object_or_404


class MusicianList( ListView):
    model = Musician


class UserEditForm( forms.ModelForm ):
    
    email      = forms.EmailField()
    
    def __init__(self, *args, **kw):
        
        if 'instance' in kw.keys():
            user = kw['instance'].user
            initVals = { 'email':      user.email }
            if not 'initial' in kw.keys(): 
                kw['initial'] = initVals
            else:
                kw['initial'].update(initVals)
        
        super(UserEditForm, self).__init__( *args, **kw )

        
        self.fields.keyOrder.remove('email')
        
        self.fields.keyOrder.insert(2, 'email')    

    def save(self):
        if self.is_valid():
            super(UserEditForm,self).save()
            self.instance.user.email  =  self.cleaned_data['email']
            self.instance.user.save()
        
    class Meta:
        model  = Musician
        exclude = [ 'user','image', 'small_image', 'instrument', 'position', 'public_description' ]
        #fields = '__all__'


def own_profile( request ):
    return user_edit( request, request.user )
 

def user_edit( request, username ):
    musician = get_object_or_404( Musician, user__username=username )
    
    if request.method == 'POST': # If the form has been submitted...
        form = UserEditForm(request.POST) # A form bound to the POST data
        form.instance = musician
        if form.is_valid(): # All validation rules pass
            form.save()
            return HttpResponseRedirect('/') # Redirect after POST
    else:
        form = UserEditForm( instance= musician )

    return render(request, 'musicians/musician_edit.html', { 'form': form, 'musician': musician }  )
    


class MusicianUpdate( UpdateView ):
    model = Musician
    #fields = []
    template_name = "musicians/musician_edit.html"
    success_url = '/books/'
    
    
def addressbook( request ):
    context = dict()
    context['musicians'] = Musician.objects.all().order_by('user__first_name')
    
    return render( request, 'musicians/addressbook.html', context )   
    
    
############################################################################################################
######################### User Management Views ############################################################
############################################################################################################

from  django.contrib.auth.views import password_change 
from django.contrib.auth import authenticate, login, logout
from django.shortcuts import redirect
from django.http import HttpResponse
from django.utils import simplejson
from django.contrib.auth.models import User
from datetime import timedelta


def change_password( request ):
    return password_change(request, "musicians/change_password.html", post_change_redirect= "/" )
    

def logout_view(request):
    logout( request )
    return redirect( login_view )


def userlistForAutocompletion(request):
    result = [ u.username for u in User.objects.all() ]
    return HttpResponse( simplejson.dumps(result), mimetype='application/json' )


def login_view( request ):
    if request.method == 'POST': # If the form has been submitted...
        raiseFirstLetter = lambda s: s[:1].upper() + s[1:] if s else ''
        username = raiseFirstLetter( request.POST['username'] )
        password = request.POST['password']
        user = authenticate( username=username, password=password )
        result = dict()
        result['err'] = ""
        if user is not None:
            if user.is_active:
                if not request.POST.get('remember', None):
                    # Expire in one year
                    request.session.set_expiry( timedelta( weeks=52 ) )
                else:
                    # Expire on browser close
                    request.session.set_expiry( 0 )
                    
                login(request, user)
                result['redirect'] = "/"
                print ( "Setting Redirect" )
                if 'next' in request.POST :
                    result['redirect'] = request.POST["next"]
                    print ( "Using " + request.POST["next"] )
            else:
                result['err'] = "Dein Account wurde deaktiviert."
                # Return a 'disabled account' error message
        else:
            result['err'] = "Falscher Benutzername oder falsches Kennwort."
            
        return HttpResponse( simplejson.dumps(result), mimetype='application/json' )
    
    else:
        # Check if user already logged in
        if request.user.is_authenticated():
            return redirect( "/")
            
        if 'next' in request.GET:
            nextPage = request.GET['next']
        else:
            nextPage = "/"
        return render( request, 'musicians/login.html', { 'next' : nextPage } )