import { PaginationDemo } from './demo';
import { Pagination, Link } from '@aws-amplify/ui-react';
import { Example, ExampleCode } from '@/components/Example';
import { ComponentStyleDisplay } from '@/components/ComponentStyleDisplay';
import ThemeExample from '@/components/ThemeExample.mdx';
import {
  ControlledPaginationExample,
  DefaultPaginationExample,
  PaginationAccessibilityExample,
  PaginationHasMorePagesExample,
  PaginationSiblingCountExample,
  PaginationStylingExample,
  PaginationThemeExample,
} from './examples';

## Demo

<PaginationDemo />

## Usage

Import the Pagination component. To use Pagination as an uncontrolled component, import the `usePagination` hook and pass it an object including the following properties:

- `totalPages` (required)
- `currentPage` (optional, defaults to `1`)
- `siblingCount` (optional, defaults to `1`)
- `hasMorePages` (optional)

<Example>
  <DefaultPaginationExample />
  <ExampleCode>
    ```tsx file=./examples/DefaultPaginationExample.tsx

    ```

  </ExampleCode>
</Example>

### Controlled component

To use Pagination as a controlled component, you'll need to handle state using these callback functions:

- `onNext`: triggered when the next-page button `>` is pressed
- `onPrevious`: triggered when the previous-page button `<` is pressed
- `onChange`: triggered every time the page changes (e.g., when a page button is pressed directly)

<Example>
  <ControlledPaginationExample />
  <ExampleCode>
    ```tsx file=./examples/ControlledPaginationExample.tsx

    ```

  </ExampleCode>
</Example>

### Paginating at an API level

It's common to use a paged API where the total number of pages in the dataset is unknown until you've reached the final page. To use the Pagination component in this scenario, set the `totalPages` prop to the total pages of content loaded from the API _so far_, and set `hasMorePages` initially to `true` (which enables the next button to be clicked to trigger another API call). Update the `totalPages` as you fetch more data. Once you reach the end of the data, set the `hasMorePages` to false (and thus the Pagination component's next button will be disabled). See below for a contrived example:

<Example>
  <PaginationHasMorePagesExample />
  <ExampleCode>
    ```tsx file=./examples/PaginationHasMorePagesExample.tsx

    ```

  </ExampleCode>
</Example>

### Sibling Count

`siblingCount` is an optional prop which controls the number of pages displayed on each side of the current page (defaults to `1`). For example, in the demo below, notice how page 5 has two siblings to the left (3 and 4) and two siblings to the right (6 and 7).

<Example>
  <PaginationSiblingCountExample />
  <ExampleCode>
    ```tsx{7} file=./examples/PaginationSiblingCountExample.tsx

    ```

  </ExampleCode>
</Example>

## Accessibility

Accessible labels are provided for the Pagination buttons either via the `aria-label` attribute or by using the [VisuallyHidden](/react/components/visuallyhidden) primitive.

Use the following props to customize these labels:

- **`previousLabel`**: Set the `aria-label` for the previous page button (defaults to `Go to previous page`)

- **`nextLabel`**: Set the `aria-label` for the next page button (defaults to `Go to next page`)

- **`currentPageLabel`**: Set the `VisuallyHidden` label for current page (defaults to `Page`). This will be used to construct the label text for current page. e.g, `Page: 1` if page `1` is the current page.

- **`pageLabel`**: Set the label for each page button other than the current page (defaults to `Go to page`). This will be used to construct the `aria-label`. e.g, `Go to page 1` for page `1` button.

By default, the root node of the Pagination component is a `<nav>` element. Elements with the navigation role, like `<nav>`, <Link href="https://www.w3.org/WAI/ARIA/apg/practices/landmark-regions/#aria_lh_step3" isExternal>require unique labels if there are multiple on the same page</Link>. Passing an `aria-label` to the Pagination component is one way to accomodate this.

<Example>
  <PaginationAccessibilityExample />
  <ExampleCode>
    ```tsx file=./examples/PaginationAccessibilityExample.tsx

    ```

  </ExampleCode>
</Example>

## CSS styling

<ThemeExample component="Pagination">
  <Example>
    <PaginationThemeExample />
    
    <ExampleCode>

    ```tsx file=./examples/PaginationThemeExample.tsx

    ```

    </ExampleCode>
  </Example>
</ThemeExample>


### Target classes

<ComponentStyleDisplay componentName="Pagination" />

### Global styling

To override styling on all Pagination components, you can set the Amplify CSS variables or use the built-in `.amplify-pagination` class.

<Example>
  <PaginationStylingExample className="pagination-global-styling" totalPages={8} />
  <ExampleCode>
    ```css
    /* styles.css */
    .amplify-pagination {
      --amplify-components-pagination-current-background-color: var(
        --amplify-colors-red-60
      );
    }
    ```
  </ExampleCode>
  <ExampleCode>
    ```jsx
    import { Pagination, usePagination } from '@aws-amplify/ui-react';
    import './styles.css';

    const PaginationGlobalStylingExample = () => {
      const paginationProps = usePagination({ totalPages: 8 });
      return <Pagination {...paginationProps} />;
    };
    ```

  </ExampleCode>
</Example>

### Local styling

To override styling on a specific Pagination component, you can use a class selector or style props.

_Using a class selector:_

<Example>
  <PaginationStylingExample className="my-custom-pagination" totalPages={7} />
  <ExampleCode>
    ```css
    /* styles.css */
    .my-custom-pagination {
      --amplify-components-pagination-current-background-color: var(
        --amplify-colors-green-80
      );
      --amplify-components-pagination-button-hover-background-color: var(
        --amplify-colors-blue-20
      );
    }
    ```
  </ExampleCode>
  <ExampleCode>
    ```jsx
    import { Pagination, usePagination } from '@aws-amplify/ui-react';
    import './styles.css';

    const PaginationClassStylingExample= () => {
      const paginationProps = usePagination({ totalPages: 7 });
      return <Pagination {...paginationProps} className="my-custom-pagination" />;
    };
    ```

  </ExampleCode>
</Example>

_Using style props:_

<Example>
  <PaginationStylingExample totalPages={5} backgroundColor="lavender" padding="1rem" />
  <ExampleCode>
    ```jsx
    import { Pagination, usePagination } from '@aws-amplify/ui-react';

    const PaginationStylePropsExample = () => {
      const paginationProps = usePagination({ totalPages: 5 });
      return <Pagination {...paginationProps} backgroundColor="lavender" padding="1rem" />;
    };
    ```

  </ExampleCode>
</Example>
