<?php
/**
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

namespace MediaWiki\Minerva\Menu\Entries;

use Message;

/**
 * Model for a simple menu entries with label and icon
 */
class SingleMenuEntry implements IMenuEntry {
	/**
	 * @var string
	 */
	private $name;
	/**
	 * @var array
	 */
	private $attributes;
	/**
	 * @var bool
	 */
	private $isJSOnly;

	/**
	 * Create a simple menu element with one component
	 *
	 * @param string $name An unique menu element identifier
	 * @param string $text Text to show on menu element
	 * @param string $url URL menu element points to
	 * @param string|array $className Additional CSS class names.
	 * @param bool $isInterface If true, the menu element is provided with data-mw='interface'
	 * and is treated as a standard part of the interface (ie. MediaWiki Core might bind to
	 * the menu element)
	 */
	public function __construct( $name, $text, $url, $className = '', bool $isInterface = true ) {
		$this->name = $name;
		$menuClass = 'menu__item--' . $name;

		$this->attributes = [
			'data-icon' => [
				'icon' => null,
			],
			'data-event-name' => null,
			'title' => null,
			'id' => null,
			'text' => $text,
			'href' => $url,
			'role' => '',
			'class' => is_array( $className ) ?
				implode( ' ', $className + [ $menuClass ] ) :
					ltrim( $className . ' ' . $menuClass ),
		];
		if ( $isInterface ) {
			// This is needed when Minerva uses a standard MediaWiki button (such as the
			// watchstar) for a different purpose than MediaWiki usually uses it for. Not setting
			// data-mw interface will prevent MediaWiki Core from binding to the element and
			// potentially triggering its own actions. See T344925 for an example bug report.
			$this->attributes['data-mw'] = 'interface';
		}
	}

	/**
	 * Override the icon used in the home menu entry.
	 *
	 * @param string $icon
	 * @return $this
	 */
	public function overrideIcon( $icon ) {
		$this->setIcon( $icon );
		return $this;
	}

	/**
	 * Override the text used in the home menu entry.
	 *
	 * @param string $text
	 * @return $this
	 */
	public function overrideText( $text ) {
		$this->attributes['text'] = $text;
		return $this;
	}

	/**
	 * Create a Single Menu entry with text, icon and active click tracking
	 *
	 * @param string $name Entry identifier
	 * @param string $text Entry label
	 * @param string $url The URL entry points to
	 * @param string $className Optional HTML classes
	 * @param string|null $icon defaults to $name if not specified
	 * @param bool $trackable Whether an entry will track clicks or not. Default is false.
	 * @return static
	 */
	public static function create( $name, $text, $url, $className = '', $icon = null, $trackable = false ) {
		$entry = new static( $name, $text, $url, $className );
		if ( $trackable ) {
			$entry->trackClicks( $name );
		}
		if ( $icon === null ) {
			$icon = $name;
		}
		$entry->setIcon( $icon );
		return $entry;
	}

	/**
	 * @inheritDoc
	 */
	public function getName() {
		return $this->name;
	}

	/**
	 * @inheritDoc
	 */
	public function getCSSClasses(): array {
		return $this->isJSOnly ? [ 'jsonly' ] : [];
	}

	/**
	 * @inheritDoc
	 */
	public function getComponents(): array {
		$attrs = [];
		foreach ( [ 'id', 'href', 'data-event-name', 'data-mw', 'role' ] as $key ) {
			$value = $this->attributes[$key] ?? null;
			if ( $value ) {
				$attrs[] = [
					'key' => $key,
					'value' => $value,
				];
			}
		}

		$btn = [
			'tag-name' => 'a',
			'label' => $this->attributes['text'],
			'array-attributes' => $attrs,
			'classes' => $this->attributes['class'],
			'data-icon' => $this->attributes['data-icon'],
		];

		return [ $btn ];
	}

	/**
	 * @param string $eventName Should clicks be tracked. To override the tracking code
	 * pass the tracking code as string
	 * @return $this
	 */
	public function trackClicks( $eventName ) {
		$this->attributes['data-event-name'] = 'menu.' . $eventName;
		return $this;
	}

	/**
	 * Set the Menu entry icon
	 * @param string|null $iconName
	 * @return $this
	 */
	public function setIcon( $iconName ) {
		if ( $iconName !== null ) {
			$this->attributes['data-icon']['icon'] = $iconName;
		} else {
			$this->attributes['data-icon'] = null;
		}
		return $this;
	}

	/**
	 * Set the menu entry title
	 * @param Message $message Title message
	 * @return $this
	 */
	public function setTitle( Message $message ): self {
		$this->attributes['title'] = $message->escaped();
		return $this;
	}

	/**
	 * Set the Menu entry ID html attribute
	 * @param string $nodeID
	 * @return $this
	 */
	public function setNodeID( $nodeID ): self {
		$this->attributes['id'] = $nodeID;
		return $this;
	}

	/**
	 * Mark entry as JS only.
	 */
	public function setJSOnly() {
		$this->isJSOnly = true;
	}
}