<?php
defined( 'ABSPATH' ) || die( 'Cheatin\' uh?' );

/**
 * Class that handles templates and menus.
 *
 * @since  1.7
 * @author Grégory Viguier
 */
class Imagify_Views {

	/**
	 * Class version.
	 *
	 * @var   string
	 * @since 1.7
	 */
	const VERSION = '1.0';

	/**
	 * Slug used for the settings page URL.
	 *
	 * @var    string
	 * @since  1.7
	 * @access protected
	 */
	protected $slug_settings;

	/**
	 * Slug used for the bulk optimization page URL.
	 *
	 * @var    string
	 * @since  1.7
	 * @access protected
	 */
	protected $slug_bulk;

	/**
	 * Slug used for the "custom folders" page URL.
	 *
	 * @var    string
	 * @since  1.7
	 * @access protected
	 */
	protected $slug_files;

	/**
	 * Stores the "custom folders" files list instance.
	 *
	 * @var    object Imagify_Files_List_Table
	 * @since  1.7
	 * @access protected
	 */
	protected $list_table;

	/**
	 * The single instance of the class.
	 *
	 * @var    object
	 * @since  1.7
	 * @access protected
	 */
	protected static $_instance;


	/** ----------------------------------------------------------------------------------------- */
	/** INSTANCE/INIT =========================================================================== */
	/** ----------------------------------------------------------------------------------------- */

	/**
	 * The constructor.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access protected
	 */
	protected function __construct() {
		$this->slug_settings = IMAGIFY_SLUG;
		$this->slug_bulk     = IMAGIFY_SLUG . '-bulk-optimization';
		$this->slug_files    = IMAGIFY_SLUG . '-files';
	}

	/**
	 * Get the main Instance.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access public
	 *
	 * @return object Main instance.
	 */
	public static function get_instance() {
		if ( ! isset( self::$_instance ) ) {
			self::$_instance = new self();
		}

		return self::$_instance;
	}

	/**
	 * Launch the hooks.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access public
	 */
	public function init() {
		// Menu items.
		add_action( 'admin_menu', array( $this, 'add_site_menus' ) );

		if ( imagify_is_active_for_network() ) {
			add_action( 'network_admin_menu', array( $this, 'add_network_menus' ) );
		}

		// Action links in plugins list.
		$basename = plugin_basename( IMAGIFY_FILE );
		add_filter( 'plugin_action_links_' . $basename,               array( $this, 'plugin_action_links' ) );
		add_filter( 'network_admin_plugin_action_links_' . $basename, array( $this, 'plugin_action_links' ) );

		// Save the "per page" option value from the files list screen.
		add_filter( 'set-screen-option', array( 'Imagify_Files_List_Table', 'save_screen_options' ), 10, 3 );
	}


	/** ----------------------------------------------------------------------------------------- */
	/** MENU ITEMS ============================================================================== */
	/** ----------------------------------------------------------------------------------------- */

	/**
	 * Add sub-menus for all sites.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access public
	 */
	public function add_site_menus() {
		// Sub-menu item: bulk optimization.
		add_media_page( __( 'Bulk Optimization', 'imagify' ), __( 'Bulk Optimization', 'imagify' ), imagify_get_capacity( 'bulk-optimize' ), $this->get_bulk_page_slug(), array( $this, 'display_bulk_page' ) );

		if ( imagify_is_active_for_network() ) {
			return;
		}

		/**
		 * Plugin is not network activated.
		 */
		if ( imagify_can_optimize_custom_folders() ) {
			// Sub-menu item: custom folders list.
			$screen_id = add_media_page( __( 'Other Media optimized by Imagify', 'imagify' ), __( 'Other Media', 'imagify' ), imagify_get_capacity( 'optimize-file' ), $this->get_files_page_slug(), array( $this, 'display_files_list' ) );

			if ( $screen_id ) {
				// Load the data for this page.
				add_action( 'load-' . $screen_id, array( $this, 'load_files_list' ) );
			}
		}

		// Sub-menu item: settings.
		add_options_page( 'Imagify', 'Imagify', imagify_get_capacity(), $this->get_settings_page_slug(), array( $this, 'display_settings_page' ) );
	}

	/**
	 * Add menu and sub-menus in the network admin when Imagify is network-activated.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access public
	 */
	public function add_network_menus() {
		global $submenu;

		if ( ! imagify_can_optimize_custom_folders() ) {
			// Main item: settings (edge case).
			add_menu_page( 'Imagify', 'Imagify', imagify_get_capacity(), $this->get_settings_page_slug(), array( $this, 'display_settings_page' ) );
			return;
		}

		// Main item: bulk optimization (custom folders).
		add_menu_page( __( 'Bulk Optimization', 'imagify' ), 'Imagify', imagify_get_capacity( 'optimize-file' ), $this->get_bulk_page_slug(), array( $this, 'display_bulk_page' ) );

		// Sub-menu item: custom folders list.
		$screen_id = add_submenu_page( $this->get_bulk_page_slug(), __( 'Other Media optimized by Imagify', 'imagify' ), __( 'Other Media', 'imagify' ), imagify_get_capacity( 'optimize-file' ), $this->get_files_page_slug(), array( $this, 'display_files_list' ) );

		// Sub-menu item: settings.
		add_submenu_page( $this->get_bulk_page_slug(), 'Imagify', __( 'Settings', 'imagify' ), imagify_get_capacity(), $this->get_settings_page_slug(), array( $this, 'display_settings_page' ) );

		// Change the sub-menu label.
		if ( ! empty( $submenu[ $this->get_bulk_page_slug() ] ) ) {
			$submenu[ $this->get_bulk_page_slug() ][0][0] = __( 'Bulk Optimization', 'imagify' ); // WPCS: override ok.
		}

		if ( $screen_id ) {
			// On the "Other Media optimized by Imagify" page, load the data.
			add_action( 'load-' . $screen_id, array( $this, 'load_files_list' ) );
		}
	}


	/** ----------------------------------------------------------------------------------------- */
	/** PLUGIN ACTION LINKS ===================================================================== */
	/** ----------------------------------------------------------------------------------------- */

	/**
	 * Add links to the plugin row in the plugins list.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access public
	 *
	 * @param  array $actions An array of action links.
	 * @return array
	 */
	public function plugin_action_links( $actions ) {
		array_unshift( $actions, sprintf( '<a href="%s" target="_blank">%s</a>', esc_url( imagify_get_external_url( 'documentation' ) ), __( 'Documentation', 'imagify' ) ) );
		array_unshift( $actions, sprintf( '<a href="%s">%s</a>', esc_url( get_imagify_admin_url( 'bulk-optimization' ) ), __( 'Bulk Optimization', 'imagify' ) ) );
		array_unshift( $actions, sprintf( '<a href="%s">%s</a>', esc_url( get_imagify_admin_url() ), __( 'Settings', 'imagify' ) ) );
		return $actions;
	}


	/** ----------------------------------------------------------------------------------------- */
	/** MAIN PAGE TEMPLATES ===================================================================== */
	/** ----------------------------------------------------------------------------------------- */

	/**
	 * The main settings page.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access public
	 */
	public function display_settings_page() {
		$this->print_template( 'page-settings' );
	}

	/**
	 * The bulk optimization page.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access public
	 */
	public function display_bulk_page() {
		$data = array(
			// Global chart.
			'total_attachments'             => 0,
			'unoptimized_attachments'       => 0,
			'optimized_attachments'         => 0,
			'errors_attachments'            => 0,
			// Stats block.
			'already_optimized_attachments' => 0,
			'original_size'                 => 0,
			'optimized_size'                => 0,
			'optimized_percent'             => 0,
			// Limits.
			'unoptimized_attachment_limit'  => 0,
			// What to optimize.
			'icon'                          => 'images-alt2',
			'title'                         => __( 'Optimize your images', 'imagify' ),
			'groups'                        => array(),
		);

		if ( imagify_is_screen( 'bulk' ) ) {
			if ( ! is_network_admin() ) {
				/**
				 * Library: in each site.
				 */
				$total_saving_data = imagify_count_saving_data();

				// Global chart.
				$data['total_attachments']             += imagify_count_attachments();
				$data['unoptimized_attachments']       += imagify_count_unoptimized_attachments();
				$data['optimized_attachments']         += imagify_count_optimized_attachments();
				$data['errors_attachments']            += imagify_count_error_attachments();
				// Stats block.
				$data['already_optimized_attachments'] += $total_saving_data['count'];
				$data['original_size']                 += $total_saving_data['original_size'];
				$data['optimized_size']                += $total_saving_data['optimized_size'];
				// Limits.
				$data['unoptimized_attachment_limit']  += imagify_get_unoptimized_attachment_limit();
				// Group.
				$data['groups']['library'] = array(
					/**
					 * The group_id corresponds to the file names like 'part-bulk-optimization-results-row-{$group_id}'.
					 * It is also used in get_imagify_localize_script_translations() and imagify_get_folder_type_data().
					 */
					'group_id' => 'library',
					'context'  => 'wp',
					'title'    => __( 'Media Library', 'imagify' ),
					/* translators: 1 is the opening of a link, 2 is the closing of this link. */
					'footer'   => sprintf( __( 'You can also re-optimize your images from your %1$sMedia Library%2$s screen.', 'imagify' ), '<a href="' . esc_url( admin_url( 'upload.php' ) ) . '">', '</a>' ),
				);
			}

			if ( imagify_can_optimize_custom_folders() && ( imagify_is_active_for_network() && is_network_admin() || ! imagify_is_active_for_network() ) ) {
				/**
				 * Custom folders: in network admin only if network activated, in each site otherwise.
				 */
				// Global chart.
				$data['total_attachments']             += Imagify_Files_Stats::count_all_files();
				$data['unoptimized_attachments']       += Imagify_Files_Stats::count_no_status_files();
				$data['optimized_attachments']         += Imagify_Files_Stats::count_optimized_files();
				$data['errors_attachments']            += Imagify_Files_Stats::count_error_files();
				// Stats block.
				$data['already_optimized_attachments'] += Imagify_Files_Stats::count_success_files();
				$data['original_size']                 += Imagify_Files_Stats::get_original_size();
				$data['optimized_size']                += Imagify_Files_Stats::get_optimized_size();

				if ( ! Imagify_Folders_DB::get_instance()->has_items() ) {
					// New Feature!
					$data['no-custom-folders'] = true;
				} elseif ( Imagify_Folders_DB::get_instance()->has_active_folders() ) {
					// Group.
					$data['groups']['custom-folders'] = array(
						'group_id' => 'custom-folders',
						'context'  => 'File',
						'title'    => __( 'Custom folders', 'imagify' ),
						/* translators: 1 is the opening of a link, 2 is the closing of this link. */
						'footer'   => sprintf( __( 'You can re-optimize your images more finely directly in the %1$simages management%2$s.', 'imagify' ), '<a href="' . esc_url( get_imagify_admin_url( 'files-list' ) ) . '">', '</a>' ),
					);
				}
			}
		}

		/**
		 * Filter the data to use on the bulk optimization page.
		 *
		 * @since  1.7
		 * @author Grégory Viguier
		 *
		 * @param array $data The data to use.
		 */
		$data = apply_filters( 'imagify_bulk_page_data', $data );

		/**
		 * Percentages.
		 */
		if ( $data['total_attachments'] && $data['optimized_attachments'] ) {
			$data['optimized_attachments_percent'] = round( 100 * $data['optimized_attachments'] / $data['total_attachments'] );
		} else {
			$data['optimized_attachments_percent'] = 0;
		}

		if ( $data['original_size'] && $data['optimized_size'] ) {
			$data['optimized_percent'] = ceil( 100 - ( 100 * $data['optimized_size'] / $data['original_size'] ) );
		} else {
			$data['optimized_percent'] = 0;
		}

		$this->print_template( 'page-bulk', $data );
	}

	/**
	 * The page displaying the "custom folders" files.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access public
	 */
	public function display_files_list() {
		$this->print_template( 'page-files-list' );
	}

	/**
	 * Initiate the "custom folders" list table data.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access public
	 */
	public function load_files_list() {
		// Instantiate the list.
		$this->list_table = new Imagify_Files_List_Table( array(
			'screen' => 'imagify-files',
		) );

		// Query the Items.
		$this->list_table->prepare_items();
	}


	/** ----------------------------------------------------------------------------------------- */
	/** GETTERS ================================================================================= */
	/** ----------------------------------------------------------------------------------------- */

	/**
	 * Get the settings page slug.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access public
	 *
	 * @return string
	 */
	public function get_settings_page_slug() {
		return $this->slug_settings;
	}

	/**
	 * Get the bulk optimization page slug.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access public
	 *
	 * @return string
	 */
	public function get_bulk_page_slug() {
		return $this->slug_bulk;
	}

	/**
	 * Get the "custom folders" files page slug.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access public
	 *
	 * @return string
	 */
	public function get_files_page_slug() {
		return $this->slug_files;
	}


	/** ----------------------------------------------------------------------------------------- */
	/** GENERIC TEMPLATE TOOLS ================================================================== */
	/** ----------------------------------------------------------------------------------------- */

	/**
	 * Get a template contents.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access public
	 *
	 * @param  string $template The template name.
	 * @param  mixed  $data     Some data to pass to the template.
	 * @return string|bool      The page contents. False if the template doesn't exist.
	 */
	public function get_template( $template, $data = array() ) {
		$path = str_replace( '_', '-', $template );
		$path = IMAGIFY_PATH . 'views/' . $template . '.php';

		if ( ! imagify_get_filesystem()->exists( $path ) ) {
			return false;
		}

		ob_start();
		include $path;
		$contents = ob_get_clean();

		return trim( (string) $contents );
	}

	/**
	 * Print a template.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 * @access public
	 *
	 * @param string $template The template name.
	 * @param mixed  $data     Some data to pass to the template.
	 */
	public function print_template( $template, $data = array() ) {
		echo $this->get_template( $template, $data );
	}
}