from django.shortcuts import render
from django.http import HttpResponse
from django import forms
from django.conf import settings
from django.utils.translation import ugettext as _
from django.core.exceptions import PermissionDenied

from scoremanager.models import Piece, Score, Recording, ScoreUserMapping, YoutubeRecording
import json
import os

def manage_repertoire( request ):
    context = {}
    context['repertoire'] = Piece.getRepertoire()
    context['allPieces' ] = Piece.objects.all().order_by( 'title' )
    return render ( request, 'scoremanager/manage_repertoire.html', context )


def manage_repertoire_ajax_save( request ):
    if request.is_ajax():
        if request.method == 'POST':
            result = json.loads( request.body )
            
            parsedResult = { int(key): value for ( key,value ) in result.items() }
            Piece.objects.all().update( repertoire_nr = None)
            for piece in Piece.objects.all():
                if piece.pk in parsedResult:
                    piece.repertoire_nr = parsedResult[piece.pk]
                    piece.save()
                
    return HttpResponse("OK")    




def list_repertoire( request ):
    context = { 'repertoire':   Piece.getRepertoire() }
    return render( request, 'scoremanager/list_repertoire.html' , context )








# ----------------------------- Piece View + Ajax views + Forms ------------------------------------------



def score_user_mapping_save( request ):
    if request.is_ajax():
        if request.method == 'POST':
            result = json.loads( request.body )
            print ( "Result " + str( result ) )
            print ( "Resulting score: " + str( result['myScore'] ) )
            result = int(result['myScore'])
            ScoreUserMapping.add_user_score_mapping( user=request.user, score= Score.objects.get(pk=result) )

    return HttpResponse("OK")

def score( request, pk ):
    requestedScore = Score.objects.get(pk=pk)

    if request.method == 'GET':
        imageFile = requestedScore.get_image_file()
        image_data = open( settings.MEDIA_ROOT + imageFile, "rb").read()
        return HttpResponse(image_data, content_type="image/jpeg")
    if request.method == "DELETE":
        if requestedScore.uploaded_by != request.user or request.user.has_perm('scoremanager.manage_scores'):
            raise PermissionDenied
        requestedScore.delete()
        return HttpResponse("OK")


def youtube_link( request ):
    result = json.loads( request.body )
    print("Youtube link: " + str(result) )

    if request.method == 'DELETE':
        linkId = int( result['linkid'] )
        youtubeRecording = YoutubeRecording.objects.get( pk = linkId )
        if youtubeRecording.uploaded_by == request.user or request.user.has_perm('scoremanager.manage_scores'):
            youtubeRecording.delete()
        else:
            raise PermissionDenied

        return HttpResponse("OK")

    elif request.method == 'POST':
        link    = str( result['link'] )
        pieceId = int( result['pieceId'] )

        newRecording = YoutubeRecording(piece=Piece.objects.get(pk=pieceId), link=link)
        newRecording.uploaded_by = request.user
        newRecording.save()
        return HttpResponse("OK")



class UploadFileForm(forms.Form):
    file  = forms.FileField( max_length="80")

    def clean_file(self):
        f = self.cleaned_data['file']
        extension = os.path.splitext( f.name )[1]
        if extension != ".pdf" and extension !=".mp3" and extension != ".zip":
            raise forms.ValidationError( _("Unknown extension. Allowed extension are mp3, pdf and zip"))


def piece_view( request, pk ):
    currentPiece = Piece.objects.get( pk=pk )
    context = {'piece': currentPiece  }

    for score in currentPiece.scores.all():
        if score.is_active_score( request.user ):
            context['activeScore']  = score
            context['pictureScore'] = score


    if not 'pictureScore' in context.keys() and len( currentPiece.scores.all()) > 0:
        context['pictureScore'] = currentPiece.scores.all()[0]

    if request.method == 'POST':
        form = UploadFileForm(request.POST, request.FILES)

        if form.is_valid():
            f = request.FILES['file']
            [basename,extension] = os.path.splitext( f.name )
            print ("extension " + extension  + " basename " + basename)
            if extension == ".mp3":
                print("Uploaded Recording")
                recording = Recording( piece=currentPiece, artist=basename, file=f )
                recording.uploaded_by=request.user
                recording.save()
            elif extension == ".pdf":
                print("Uploaded Score")
                score = Score( piece=currentPiece, score_type=basename, file=f )
                score.uploaded_by=request.user
                score.save()
            elif extension == ".zip":
                #TODO
                print ("uploaded zip - not yet supported")

    else:
        form = UploadFileForm()

    context['form'] = form

    return render( request, 'scoremanager/piece_view.html', context )