<?php

abstract class WPML_TM_Menus {

	protected $post_types;
	protected $tab_items;
	private $base_target_url;
	protected $current_shown_item;

	/** @var  WPML_UI_Screen_Options_Pagination|null $dashboard_pagination */
	protected $dashboard_pagination;

	function __construct() {
		$this->current_shown_item = isset( $_GET['sm'] ) ? $_GET['sm'] : $this->get_default_tab();
		$this->base_target_url    = dirname( __FILE__ );
	}

	public function display_main( ?WPML_UI_Screen_Options_Pagination $dashboard_pagination = null ) {
		$this->dashboard_pagination = $dashboard_pagination;
		if ( true !== apply_filters( 'wpml_tm_lock_ui', false ) ) {
			$this->render_main();
		}
	}

	abstract protected function render_main();

	private function build_tab_item_target_url( $target ) {
		return $this->base_target_url . $target;
	}

	abstract protected function build_tab_items();

	/**
	 * @return string
	 */
	private function get_current_shown_item() {
		return $this->current_shown_item;
	}

	private function build_tabs() {
		$tm_sub_menu = $this->get_current_shown_item();
		?>
		<div class="wpml-tab-wrapper">
		<?php
		foreach ( $this->tab_items as $id => $tab_item ) {
			if ( ! isset( $tab_item['caption'] ) ) {
				continue;
			}
			if ( isset( $tab_item['visible'] ) && ! $tab_item['visible'] ) {
				continue;
			}
			if ( ! isset( $tab_item['target'] ) && ! isset( $tab_item['callback'] ) ) {
				continue;
			}

			$caption = $tab_item['caption'];
			if ( ! $this->current_user_can_access( $tab_item ) ) {
				continue;
			}

			$classes = array(
				'nav-tab',
				'nav-tab-' . $id,
			);

			if ( $tm_sub_menu === $id ) {
				$classes[] = 'nav-tab-active';
			}

			$class = implode( ' ', $classes );
			$href  = 'admin.php?page=' . WPML_TM_FOLDER . $this->get_page_slug() . '&sm=' . $id;

			?>
			<a class="<?php echo esc_attr( $class ); ?>" href="<?php echo esc_attr( $href ); ?>">
				<span><?php echo $caption; ?></span>
				<?php if ( isset( $tab_item['description'] ) && ! empty( $tab_item['description'] ) ) : ?>
					<?php echo wp_kses_post( $tab_item['description'] ); ?>
				<?php endif; ?>
			</a>
			<?php
		}
		?>
		</div>
		<?php
	}

	private function build_content() {
		$tm_sub_menu = $this->get_current_shown_item();
		foreach ( $this->tab_items as $id => $tab_item ) {
			if ( ! isset( $tab_item['caption'] ) ) {
				continue;
			}
			if ( ! isset( $tab_item['target'] ) && ! isset( $tab_item['callback'] ) ) {
				continue;
			}

			if ( $tm_sub_menu == $id ) {
				if ( $this->current_user_can_access( $tab_item ) ) {
					if ( isset( $tab_item['target'] ) ) {
						$target = $tab_item['target'];
						/** @noinspection PhpIncludeInspection */
						include_once $this->build_tab_item_target_url( $target );
					}
					if ( isset( $tab_item['callback'] ) ) {
						$callback = $tab_item['callback'];
						call_user_func( $callback );
					}
				}
			}
		}
		do_action( 'icl_tm_menu_' . $tm_sub_menu );
	}

	protected function render_items() {
		if ( $this->tab_items ) {
			?>
			<div class="icl-translation-management-menu wpml-tabs">
				<?php
				$this->build_tabs();
				?>
			</div>
			<div class="icl_tm_wrap wpml-wrap">
				<?php
				$this->build_content();
				?>
			</div>
			<?php
		}
	}

	public function build_content_dashboard_fetch_translations_box() {
		if ( TranslationProxy::is_current_service_active_and_authenticated() ) {
			$tm_polling_box = new WPML_TM_Polling_Box();
			echo $tm_polling_box->render();
		}
	}


	/**
	 * Used only by unit tests at the moment
	 *
	 * @return mixed
	 */
	public function get_post_types() {
		return $this->post_types;
	}


	protected function heading( $text ) {
		?>
		<h3 class="wpml-tm-section-header wpml-tm-dashboard-h3"><?php echo esc_html( $text ); ?></h3>
		<?php
	}

	private function current_user_can_access( $tab_item ) {
		$current_user_can = isset( $tab_item['current_user_can'] ) ? $tab_item['current_user_can'] : false;

		if ( is_array( $current_user_can ) ) {
			foreach ( $current_user_can as $capability ) {
				if ( current_user_can( $capability ) ) {
					return true;
				}
			}
			return false;
		} else {
			return current_user_can( $current_user_can );
		}
	}

	abstract protected function get_page_slug();

	abstract protected function get_default_tab();
}
