+# -*- coding: utf-8 -*-
+
+from optparse import make_option
+
+from django.core.management.base import BaseCommand
+from wtem.management.commands import send_mail
+from django.template.loader import render_to_string
+
+from stage2.models import Participant
+
+
+class Command(BaseCommand):
+    help = 'Sends personalized links to WTEM contestants'
+    args = '<email_address1>, <email_address2>, ...'
+
+    option_list = BaseCommand.option_list + (
+        make_option(
+            '--all',
+            action='store_true',
+            dest='all',
+            default=False,
+            help='Use all available participants'),
+        make_option(
+            '--force',
+            action='store_true',
+            dest='force',
+            default=False,
+            help='Force sending key even if one was already sent')
+        )
+
+    def handle(self, *args, **options):
+        if len(args) or options['all']:
+            return self.send_keys(*args, **options)
+        self.stdout.write('No participants selected')
+
+    def send_keys(self, *args, **options):
+        sent = 0
+        failed = 0
+
+        participants = Participant.objects.all()
+        if not options['force']:
+            participants = participants.filter(key_sent=False)
+        if len(args):
+            participants = participants.filter(email__in=args)
+
+        for participant in participants:
+            assert len(participant.key) == 30
+
+            try:
+                self.send_key(participant)
+            except Exception as e:
+                failed += 1
+                self.stdout.write('failed sending to: ' + participant.email + ' - ' + str(e))
+            else:
+                participant.key_sent = True
+                participant.save()
+                sent += 1
+                self.stdout.write('key sent to: ' + participant.email)
+
+        self.stdout.write('sent: ' + str(sent))
+
+    def send_key(self, participant):
+        self.stdout.write('>>> sending to ' + participant.email)
+        send_mail(
+            subject="Olimpiada Cyfrowa - Twój link do drugiego etapu",
+            body=render_to_string('stage2/email_key.txt', {'participant': participant}),
+            to=[participant.email])