from StringIO import StringIO

from django.conf.urls import patterns, url

from django.contrib import admin

from django.core.management import call_command

from django.http import HttpResponse

from django.shortcuts import render_to_response

from django.template import RequestContext

from guardian.admin import GuardedModelAdmin

from ldt.ldt_utils.contentindexer import ContentIndexer, ProjectIndexer

from ldt.ldt_utils.fileimport import FileImport, FileImportError

from ldt.ldt_utils.forms import LdtImportForm, ReindexForm, StatAnnotationForm

from ldt.ldt_utils.models import Content, Project, Media, Author

from ldt.ldt_utils.stat import update_stat_content

class ProjectAdmin(GuardedModelAdmin):

    pass

class AuthorAdmin(GuardedModelAdmin):

    pass

class MediaAdmin(GuardedModelAdmin):

    readonly_fields = ['src_hash']

class ContentAdmin(GuardedModelAdmin):

    def import_file(self, request):

        if request.method == 'POST':

            form = LdtImportForm(request.POST, request.FILES)

            if form.is_valid():

                filetoprocess = form.cleaned_data['importFile']

                flatten = form.cleaned_data['flatten']

                videoPath = form.cleaned_data['videoPath']

                # fi = None

                fi = FileImport(filetoprocess, videoPath, flatten)

                try:

                    fi.process_file()

                    args = {'message': "File imported"}

                except FileImportError:

                    non_field_errors = form.non_field_errors()

                    non_field_errors.append("Error when importing : unknown file type")

                    form._errors["__all__"] = non_field_errors

                    args = {'message': "Can not import file, unknown file type", 'form': form}

            else:

                non_field_errors = form.non_field_errors()

                non_field_errors.append("Error when importing : invalid form")

                form._errors["__all__"] = non_field_errors

                args = {'message': "Error when importing : invalid form", 'form': form}

        else:

            form = LdtImportForm()

            args = {'form': form, 'current_app': self.admin_site.name, 'current_action' : 'import_file'}

        return render_to_response('admin/ldt_utils/content/upload_form.html', args, context_instance=RequestContext(request))

    def reindex(self, request):

        message = None

        if request.method == "POST":

            form = ReindexForm(request.POST)

            if form.is_valid():    

                contentList = form.cleaned_data["contents"]

                indexer = ContentIndexer(contentList)

                indexer.index_all()

                index_projects = form.cleaned_data["index_projects"]

                if index_projects:

                    projectList = Project.objects.filter(contents__in=contentList, state=2).distinct() #filter(contents__in=contentList) @UndefinedVariable

                    indexer = ProjectIndexer(projectList)

                    indexer.index_all()

                message = "Indexation ok : " + repr(form.cleaned_data["contents"]) 

                form = ReindexForm()

                # except Exception, inst:

                    # non_field_errors = form.non_field_errors()

                    # non_field_errors.append("Error when reindexing : " + cgi.escape(repr(inst)))

                    # form._errors["__all__"] = non_field_errors

                    #message = "ERROR : " + repr(non_field_errors)

        else:

            form = ReindexForm()

        return render_to_response('admin/ldt_utils/content/reindex_form.html', {'form': form, 'message':message, 'current_app': self.admin_site.name, 'current_action' : 'reindex' }, context_instance=RequestContext(request))

    def stats_annotations(self, request):

        message = None

        if request.method == "POST":

            form = StatAnnotationForm(request.POST)

            if form.is_valid():

                if form.cleaned_data['choose_all']:

                    contents = Content.objects.all()

                else:

                    contents = form.cleaned_data['contents']

                for content in contents:

                    update_stat_content(content)

                message = "Stats computed for :" + repr(contents)

        else:

            form = StatAnnotationForm()

        return render_to_response('admin/ldt_utils/content/stats_form.html', {'form': form, 'message':message, 'current_app': self.admin_site.name, 'current_action' : 'stats' }, context_instance=RequestContext(request))

    def dumpdata(self, request):

        # do we dump the datas ?

        dump_str = request.REQUEST.get("dump")

        app_str = request.REQUEST.get("app", "")

        dump_bool = False

        if dump_str:

            dump_bool = {'true': True, 'false': False, "0": False, "1": True}.get(dump_str.lower())

        if dump_bool:

            content = StringIO()

            if app_str=="":

                call_command("dumpdata", indent=1, stdout=content)

            else:

                call_command("dumpdata", app_str, indent=1, stdout=content)

            content.seek(0)

            out = content.getvalue()

            content.close()

            res = HttpResponse(out, mimetype='application/json')

            res["Content-Disposition"] = "attachment; filename=dumpdata_ldt.json"

            return res

        return render_to_response('admin/ldt_utils/content/dumpdata.html', {}, context_instance=RequestContext(request))

    def get_urls(self):

        urls = super(ContentAdmin, self).get_urls()

        content_urls = patterns('',

            url(r'^reindex/$', self.admin_site.admin_view(self.reindex), name="ldt_content_reindex"),

            url(r'^import/$', self.admin_site.admin_view(self.import_file), name="ldt_content_import_file"),

            url(r'^stats/$', self.admin_site.admin_view(self.stats_annotations), name="ldt_project_compute_stats"),

            url(r'^dumpdata/$', self.admin_site.admin_view(self.dumpdata), name="ldt_admin_dump_data"),

        )

        return content_urls + urls

admin.site.register(Project, ProjectAdmin)

admin.site.register(Content, ContentAdmin)

admin.site.register(Media, MediaAdmin)

admin.site.register(Author, AuthorAdmin)