import {
  Button,
  Card,
  CardContent,
  CardHeader,
  CardTitle,
  FormField,
  Input,
  Label,
  Switch,
} from '@/components/ui';
import { Text } from '@/components/ui/Typography.tsx';
import Textarea from '@/components/ui/Textarea.tsx';
import { usePage, useUpdatePage, useCreatePage, usePublishPage } from '@/hooks/api/useAdminAPI.ts';
import { useTranslation } from '@/hooks/useI18n.tsx';
import { ArrowLeft, Save, Eye } from 'lucide-react';
import { useState } from 'react';
import { useNavigate, useParams } from 'react-router-dom';
import type { CreatePageRequest, UpdatePageRequest } from '@/services/admin-api.ts';

const ContentPageEditPage = () => {
  const { t } = useTranslation();
  const { id } = useParams<{ id: string }>();
  const navigate = useNavigate();
  const isNew = id === 'new';

  const { data: page } = usePage(isNew ? null : id);
  const { mutate: updatePage, isPending: isUpdating } = useUpdatePage();
  const { mutate: createPage, isPending: isCreating } = useCreatePage();
  const { mutate: publishPage, isPending: isPublishing } = usePublishPage();

  const [formData, setFormData] = useState<CreatePageRequest>(() => ({
    slug: page?.slug ?? '',
    title: page?.title ?? '',
    content: page?.content ?? '',
    status: page?.status ?? 'draft',
    visibility: page?.visibility ?? 'public',
  }));

  const handleSubmit = (e: React.FormEvent) => {
    e.preventDefault();

    if (isNew) {
      createPage(formData, {
        onSuccess: (newPage) => {
          navigate(`/admin/content/pages/${newPage.id}/edit`);
        },
      });
    } else if (id) {
      updatePage(
        {
          id,
          request: formData as UpdatePageRequest,
        },
        {
          onSuccess: () => {
            // Show success message
          },
        }
      );
    }
  };

  const handlePublish = () => {
    if (id && page?.status !== 'published') {
      publishPage(id, {
        onSuccess: () => {
          // Show success message
        },
      });
    }
  };

  return (
    <div className="space-y-6">
      <Button variant="ghost" onClick={() => navigate('/admin/content/pages')}>
        <ArrowLeft className="h-4 w-4 mr-2" />
        {t('adminPage.content.pages.backToList') || 'Back to Pages'}
      </Button>

      <form onSubmit={handleSubmit}>
        <Card>
          <CardHeader>
            <div className="flex items-center justify-between">
              <CardTitle>
                {isNew
                  ? t('adminPage.content.pages.newPage') || 'New Page'
                  : t('adminPage.content.pages.editPage') || 'Edit Page'}
              </CardTitle>
              {!isNew && page?.status !== 'published' && (
                <Button type="button" onClick={handlePublish} disabled={isPublishing}>
                  {isPublishing
                    ? t('adminPage.content.pages.publishing') || 'Publishing...'
                    : t('adminPage.content.pages.publish') || 'Publish'}
                </Button>
              )}
              {!isNew && page?.slug && (
                <Button
                  type="button"
                  variant="outline"
                  onClick={() => window.open(`/${page.slug}`, '_blank')}
                >
                  <Eye className="h-4 w-4 mr-2" />
                  {t('adminPage.content.pages.preview') || 'Preview'}
                </Button>
              )}
            </div>
          </CardHeader>
          <CardContent className="space-y-6">
            <FormField>
              <Label>{t('adminPage.content.pages.slug') || 'Slug'}</Label>
              <Input
                value={formData.slug}
                onChange={(e) => setFormData({ ...formData, slug: e.target.value })}
                placeholder="about-us"
                required
                disabled={!isNew}
              />
              <Text variant="muted" className="text-sm">
                {t('adminPage.content.pages.slugHint') ||
                  'URL-friendly identifier (e.g., about-us, contact)'}
              </Text>
            </FormField>

            <FormField>
              <Label>{t('adminPage.content.pages.title') || 'Title'}</Label>
              <Input
                value={formData.title}
                onChange={(e) => setFormData({ ...formData, title: e.target.value })}
                required
              />
            </FormField>

            <FormField>
              <Label>{t('adminPage.content.pages.content') || 'Content'}</Label>
              <Textarea
                className="min-h-[300px]"
                value={formData.content}
                onChange={(e) => setFormData({ ...formData, content: e.target.value })}
                placeholder={
                  t('adminPage.content.pages.contentPlaceholder') ||
                  'Enter page content (HTML or Markdown)...'
                }
              />
              <Text variant="muted" className="text-sm">
                {t('adminPage.content.pages.contentHint') ||
                  'Supports HTML and Markdown formatting'}
              </Text>
            </FormField>

            <FormField>
              <div className="flex items-center justify-between">
                <Label>{t('adminPage.content.pages.status') || 'Status'}</Label>
                <div className="flex items-center gap-2">
                  <span className="text-sm text-muted-foreground">
                    {formData.status === 'published'
                      ? t('adminPage.content.pages.published') || 'Published'
                      : t('adminPage.content.pages.draft') || 'Draft'}
                  </span>
                  <Switch
                    checked={formData.status === 'published'}
                    onCheckedChange={(checked) =>
                      setFormData({ ...formData, status: checked ? 'published' : 'draft' })
                    }
                  />
                </div>
              </div>
            </FormField>

            <div className="flex justify-end gap-4">
              <Button
                type="button"
                variant="outline"
                onClick={() => navigate('/admin/content/pages')}
              >
                {t('adminPage.content.pages.cancel') || 'Cancel'}
              </Button>
              <Button type="submit" disabled={isUpdating || isCreating}>
                <Save className="h-4 w-4 mr-2" />
                {isUpdating || isCreating
                  ? t('adminPage.content.pages.saving') || 'Saving...'
                  : t('adminPage.content.pages.save') || 'Save'}
              </Button>
            </div>
          </CardContent>
        </Card>
      </form>
    </div>
  );
};

export default ContentPageEditPage;