<?php

namespace MediaWiki\Skins\Vector;

/**
 * @ingroup Skins
 * @package Vector
 * @internal
 */
class SkinVectorLegacy extends SkinVector {
	/** @var int */
	private const MENU_TYPE_DEFAULT = 0;
	/** @var int */
	private const MENU_TYPE_TABS = 1;
	/** @var int */
	private const MENU_TYPE_DROPDOWN = 2;
	private const MENU_TYPE_PORTAL = 3;

	/**
	 * Whether or not the legacy version of the skin is being used.
	 *
	 * @return bool
	 */
	protected function isLegacy(): bool {
		return true;
	}

	/**
	 * Show the ULS button if it's modern Vector, languages in header is enabled,
	 * and the ULS extension is enabled. Hide it otherwise.
	 * There is no point in showing the language button if ULS extension is unavailable
	 * as there is no ways to add languages without it.
	 * @return bool
	 */
	protected function shouldHideLanguages(): bool {
		return true;
	}

	/**
	 * @inheritDoc
	 */
	protected function isLanguagesInContentAt( $location ) {
		return false;
	}

	/**
	 * Performs updates to all portlets.
	 *
	 * @param array $data
	 * @return array
	 */
	private function decoratePortletsData( array $data ) {
		foreach ( $data['data-portlets'] as $key => $pData ) {
			$data['data-portlets'][$key] = $this->decoratePortletData(
				$key,
				$pData
			);
		}
		$mainMenuData = $data['data-portlets-sidebar'];
		$mainMenuData['data-portlets-first'] = $this->decoratePortletData(
			'navigation', $mainMenuData['data-portlets-first']
		);
		$rest = $mainMenuData['array-portlets-rest'];
		foreach ( $rest as $key => $pData ) {
			$rest[$key] = $this->decoratePortletData(
				$pData['id'], $pData
			);
		}
		$mainMenuData['array-portlets-rest'] = $rest;
		$data['data-portlets-main-menu'] = $mainMenuData;
		return $data;
	}

	/**
	 * Performs the following updates to portlet data:
	 * - Adds concept of menu types
	 * - Marks the selected variant in the variant portlet
	 * - modifies tooltips of personal and user-menu portlets
	 * @param string $key
	 * @param array $portletData
	 * @return array
	 */
	private function decoratePortletData(
		string $key,
		array $portletData
	): array {
		$isIconDropdown = false;
		switch ( $key ) {
			case 'data-user-menu':
				$type = self::MENU_TYPE_DROPDOWN;
				$isIconDropdown = true;
				break;
			case 'data-actions':
			case 'data-variants':
			case 'data-sticky-header-toc':
				$type = self::MENU_TYPE_DROPDOWN;
				break;
			case 'data-views':
			case 'data-associated-pages':
			case 'data-namespaces':
				$type = self::MENU_TYPE_TABS;
				break;
			case 'data-notifications':
			case 'data-personal':
			case 'data-user-page':
			case 'data-vector-user-menu-overflow':
				$type = self::MENU_TYPE_DEFAULT;
				break;
			case 'data-languages':
				$type = $this->isLanguagesInContent() ?
					self::MENU_TYPE_DROPDOWN : self::MENU_TYPE_PORTAL;
				break;
			default:
				$type = self::MENU_TYPE_PORTAL;
				break;
		}

		$isDropdown = $type === self::MENU_TYPE_DROPDOWN;
		if ( $isDropdown && !$isIconDropdown ) {
			$portletData['class'] .= ' vector-menu-dropdown-noicon';
		}

		if ( $key === 'data-personal' && $this->isLegacy() ) {
			// Set tooltip to empty string for the personal menu for both logged-in and logged-out users
			// to avoid showing the tooltip for legacy version.
			$portletData['html-tooltip'] = '';
			$portletData['class'] .= ' vector-user-menu-legacy';
		}

		// Special casing for Variant to change label to selected.
		// Hopefully we can revisit and possibly remove this code when the language switcher is moved.
		if ( $key === 'data-variants' ) {
			$portletData = $this->updateVariantsMenuLabel( $portletData );
		}

		$portletData = $this->updatePortletClasses(
			$portletData,
			$type
		);

		return $portletData + [
			'is-dropdown' => $isDropdown,
			'is-portal' => $type === self::MENU_TYPE_PORTAL,
		];
	}

	/**
	 * Helper for applying Vector menu classes to portlets
	 *
	 * @param array $portletData returned by SkinMustache to decorate
	 * @param int $type representing one of the menu types (see MENU_TYPE_* constants)
	 * @return array modified version of portletData input
	 */
	private function updatePortletClasses(
		array $portletData,
		int $type = self::MENU_TYPE_DEFAULT
	) {
		$extraClasses = [
			self::MENU_TYPE_DROPDOWN => 'vector-menu-dropdown',
			self::MENU_TYPE_TABS => 'vector-menu-tabs',
			self::MENU_TYPE_PORTAL => 'vector-menu-portal portal',
			self::MENU_TYPE_DEFAULT => '',
		];
		if ( $this->isLegacy() ) {
			$extraClasses[self::MENU_TYPE_TABS] .= ' vector-menu-tabs-legacy';
		}
		$portletData['class'] .= ' ' . $extraClasses[$type];

		if ( !isset( $portletData['heading-class'] ) ) {
			$portletData['heading-class'] = '';
		}
		if ( $type === self::MENU_TYPE_DROPDOWN ) {
			$portletData = Hooks::updateDropdownMenuData( $portletData );
		}

		$portletData['class'] = trim( $portletData['class'] );
		$portletData['heading-class'] = trim( $portletData['heading-class'] );
		return $portletData;
	}

	/**
	 * @inheritDoc
	 */
	public function getTemplateData(): array {
		$parentData = $this->decoratePortletsData( parent::getTemplateData() );

		// SkinVector sometimes serves new Vector as part of removing the
		// skin version user preference. To avoid T302461 we need to unset it here.
		// This shouldn't be run on SkinVector22.
		unset( $parentData['data-toc'] );
		return $parentData;
	}
}