from django.contrib import messages
from django.db.transaction import atomic
from django.shortcuts import render
from django.utils.translation import ugettext_lazy, ugettext as _, ungettext

from misago.forums.lists import get_forum_path

from misago.threads import moderation
from misago.threads.forms.moderation import MoveThreadsForm
from misago.threads.views.generic.threads import Actions


__all__ = ['ForumActions']


class ForumActions(Actions):
    def get_available_actions(self, kwargs):
        self.forum = kwargs['forum']

        actions = []

        if self.forum.acl['can_change_threads_labels'] == 2:
            for label in self.forum.labels:
                actions.append({
                    'action': 'label:%s' % label.slug,
                    'icon': 'tag',
                    'name': _('Label as "%(label)s"') % {'label': label.name}
                })

            if self.forum.labels:
                actions.append({
                    'action': 'unlabel',
                    'icon': 'times-circle',
                    'name': _("Remove labels")
                })

        if self.forum.acl['can_change_threads_weight'] == 2:
            actions.append({
                'action': 'announce',
                'icon': 'star',
                'name': _("Change to announcements")
            })
        if self.forum.acl['can_change_threads_weight']:
            actions.append({
                'action': 'pin',
                'icon': 'bookmark',
                'name': _("Change to pinned")
            })
            actions.append({
                'action': 'reset',
                'icon': 'circle',
                'name': _("Reset weight")
            })

        if self.forum.acl['can_review_moderated_content']:
            actions.append({
                'action': 'approve',
                'icon': 'check',
                'name': _("Approve threads")
            })

        if self.forum.acl['can_move_threads']:
            actions.append({
                'action': 'move',
                'icon': 'arrow-right',
                'name': _("Move threads")
            })

        if self.forum.acl['can_merge_threads']:
            actions.append({
                'action': 'merge',
                'icon': 'reply-all',
                'name': _("Merge threads")
            })

        if self.forum.acl['can_close_threads']:
            actions.append({
                'action': 'open',
                'icon': 'unlock-alt',
                'name': _("Open threads")
            })
            actions.append({
                'action': 'close',
                'icon': 'lock',
                'name': _("Close threads")
            })

        if self.forum.acl['can_hide_threads']:
            actions.append({
                'action': 'unhide',
                'icon': 'eye',
                'name': _("Unhide threads")
            })
            actions.append({
                'action': 'hide',
                'icon': 'eye-slash',
                'name': _("Hide threads")
            })
        if self.forum.acl['can_hide_threads'] == 2:
            actions.append({
                'action': 'delete',
                'icon': 'times',
                'name': _("Delete threads"),
                'confirmation': _("Are you sure you want to delete selected "
                                  "threads? This action can't be undone.")
            })

        return actions

    def action_label(self, request, threads, label_slug):
        for label in self.forum.labels:
            if label.slug == label_slug:
                break
        else:
            raise ModerationError(_("Requested action is invalid."))

        changed_threads = 0
        for thread in threads:
            if moderation.label_thread(request.user, thread, label):
                changed_threads += 1

        if changed_threads:
            message = ungettext(
                '%(changed)d thread was labeled "%(label)s".',
                '%(changed)d threads were labeled "%(label)s".',
            changed_threads)
            messages.success(request, message % {
                'changed': changed_threads,
                'label': label.name
            })
        else:
            message = _("No threads were labeled.")
            messages.info(request, message)

    def action_unlabel(self, request, threads):
        changed_threads = 0
        for thread in threads:
            if moderation.unlabel_thread(request.user, thread):
                changed_threads += 1

        if changed_threads:
            message = ungettext(
                '%(changed)d thread label was remoded.',
                '%(changed)d threads labels were removed.',
            changed_threads)
            messages.success(request, message % {'changed': changed_threads})
        else:
            message = _("No threads were unlabeled.")
            messages.info(request, message)

    def action_announce(self, request, threads):
        changed_threads = 0
        for thread in threads:
            if moderation.announce_thread(request.user, thread):
                changed_threads += 1

        if changed_threads:
            message = ungettext(
                '%(changed)d thread was changed to announcement.',
                '%(changed)d threads were changed to announcements.',
            changed_threads)
            messages.success(request, message % {'changed': changed_threads})
        else:
            message = _("No threads were changed to announcements.")
            messages.info(request, message)

    def action_pin(self, request, threads):
        changed_threads = 0
        for thread in threads:
            if moderation.pin_thread(request.user, thread):
                changed_threads += 1

        if changed_threads:
            message = ungettext(
                '%(changed)d thread was pinned.',
                '%(changed)d threads were pinned.',
            changed_threads)
            messages.success(request, message % {'changed': changed_threads})
        else:
            message = _("No threads were pinned.")
            messages.info(request, message)

    def action_reset(self, request, threads):
        changed_threads = 0
        for thread in threads:
            if moderation.reset_thread(request.user, thread):
                changed_threads += 1

        if changed_threads:
            message = ungettext(
                '%(changed)d thread weight was reset.',
                '%(changed)d threads weight was reset.',
            changed_threads)
            messages.success(request, message % {'changed': changed_threads})
        else:
            message = _("No threads weight was reset.")
            messages.info(request, message)

    move_threads_template = 'misago/threads/move.html'

    def action_move(self, request, threads):
        form = MoveThreadsForm(user=request.user, forum=self.forum)

        if request.method == "POST" and 'submit' in request.POST:
            form = MoveThreadsForm(
                request.POST, user=request.user, forum=self.forum)
            if form.is_valid():
                new_forum = form.cleaned_data['new_forum']
                for thread in threads:
                    moderation.move_thread(request.user, thread, new_forum)

                with atomic():
                    self.forum.synchronize()
                    self.forum.save()
                    new_forum.synchronize()
                    new_forum.save()

                changed_threads = len(threads)
                message = ungettext(
                    '%(changed)d thread was moved to %(forum)s.',
                    '%(changed)d threads were moved to %(forum)s.',
                changed_threads)
                messages.success(request, message % {
                    'changed': changed_threads,
                    'forum': new_forum.name
                })

                return None # trigger threads list refresh

        return render(request, self.move_threads_template, {
            'form': form,
            'forum': self.forum,
            'path': get_forum_path(self.forum),
            'threads': threads
        })

    def action_close(self, request, threads):
        changed_threads = 0
        for thread in threads:
            if moderation.close_thread(request.user, thread):
                changed_threads += 1

        if changed_threads:
            message = ungettext(
                '%(changed)d thread was closed.',
                '%(changed)d threads were closed.',
            changed_threads)
            messages.success(request, message % {'changed': changed_threads})
        else:
            message = _("No threads were closed.")
            messages.info(request, message)

    def action_open(self, request, threads):
        changed_threads = 0
        for thread in threads:
            if moderation.open_thread(request.user, thread):
                changed_threads += 1

        if changed_threads:
            message = ungettext(
                '%(changed)d thread was opened.',
                '%(changed)d threads were opened.',
            changed_threads)
            messages.success(request, message % {'changed': changed_threads})
        else:
            message = _("No threads were opened.")
            messages.info(request, message)

    def action_unhide(self, request, threads):
        changed_threads = 0
        for thread in threads:
            if moderation.unhide_thread(request.user, thread):
                changed_threads += 1

        if changed_threads:
            with atomic():
                self.forum.synchronize()
                self.forum.save()

            message = ungettext(
                '%(changed)d thread was made visible.',
                '%(changed)d threads were made visible.',
            changed_threads)
            messages.success(request, message % {'changed': changed_threads})
        else:
            message = _("No threads were made visible.")
            messages.info(request, message)

    def action_hide(self, request, threads):
        changed_threads = 0
        for thread in threads:
            if moderation.hide_thread(request.user, thread):
                changed_threads += 1

        if changed_threads:
            with atomic():
                self.forum.synchronize()
                self.forum.save()

            message = ungettext(
                '%(changed)d thread was hidden.',
                '%(changed)d threads were hidden.',
            changed_threads)
            messages.success(request, message % {'changed': changed_threads})
        else:
            message = _("No threads were hidden.")
            messages.info(request, message)

    def action_delete(self, request, threads):
        changed_threads = 0
        for thread in threads:
            if moderation.delete_thread(request.user, thread):
                changed_threads += 1

        if changed_threads:
            with atomic():
                self.forum.synchronize()
                self.forum.save()

            message = ungettext(
                '%(changed)d thread was deleted.',
                '%(changed)d threads were deleted.',
            changed_threads)
            messages.success(request, message % {'changed': changed_threads})
        else:
            message = _("No threads were deleted.")
            messages.info(request, message)