<?php
/**
 * Smush installer (update/upgrade procedures): Installer class
 *
 * @package Smush\Core
 * @since 2.8.0
 *
 * @author Anton Vanyukov <anton@incsub.com>
 *
 * @copyright (c) 2018, Incsub (http://incsub.com)
 */

namespace Smush\Core;

use WP_Smush;

if ( ! defined( 'WPINC' ) ) {
	die;
}

/**
 * Class Installer for handling updates and upgrades of the plugin.
 *
 * @since 2.8.0
 */
class Installer {

	/**
	 * Triggered on Smush deactivation.
	 *
	 * @since 3.1.0
	 */
	public static function smush_deactivated() {
		WP_Smush::get_instance()->core()->mod->cdn->unschedule_cron();
	}

	/**
	 * Check if a existing install or new.
	 *
	 * @since 2.8.0  Moved to this class from wp-smush.php file.
	 */
	public static function smush_activated() {
		if ( ! defined( 'WP_SMUSH_ACTIVATING' ) ) {
			define( 'WP_SMUSH_ACTIVATING', true );
		}

		$version = get_site_option( WP_SMUSH_PREFIX . 'version' );

		if ( ! class_exists( 'Settings' ) ) {
			/* @noinspection PhpIncludeInspection */
			require_once WP_SMUSH_DIR . 'core/class-settings.php';
		}

		Settings::get_instance()->init();
		$settings = Settings::get_instance()->get();

		// If the version is not saved or if the version is not same as the current version,.
		if ( ! $version || WP_SMUSH_VERSION !== $version ) {
			global $wpdb;
			// Check if there are any existing smush stats.
			$results = $wpdb->get_var(
				$wpdb->prepare(
					"SELECT meta_id FROM {$wpdb->postmeta} WHERE meta_key=%s LIMIT 1",
					'wp-smpro-smush-data'
				)
			); // db call ok; no-cache ok.

			if ( $results ) {
				update_site_option( 'wp-smush-install-type', 'existing' );
			} else {
				// Check for existing settings.
				if ( false !== $settings['auto'] ) {
					update_site_option( 'wp-smush-install-type', 'existing' );
				}
			}

			// Create directory smush table.
			self::directory_smush_table();

			// Store the plugin version in db.
			update_site_option( WP_SMUSH_PREFIX . 'version', WP_SMUSH_VERSION );
		}
	}

	/**
	 * Handle plugin upgrades.
	 *
	 * @since 2.8.0
	 */
	public static function upgrade_settings() {
		// Avoid to execute this over an over in same thread.
		if ( defined( 'WP_SMUSH_ACTIVATING' ) || ( defined( 'WP_SMUSH_UPGRADING' ) && WP_SMUSH_UPGRADING ) ) {
			return;
		}

		$version = get_site_option( WP_SMUSH_PREFIX . 'version' );

		if ( false === $version ) {
			self::smush_activated();
		}

		if ( false !== $version && WP_SMUSH_VERSION !== $version ) {

			if ( ! defined( 'WP_SMUSH_UPGRADING' ) ) {
				define( 'WP_SMUSH_UPGRADING', true );
			}

			if ( version_compare( $version, '3.0', '<' ) ) {
				self::upgrade_3_0();
			}

			if ( version_compare( $version, '3.2.0', '<' ) ) {
				self::upgrade_3_2_0();
			}

			if ( version_compare( $version, '3.2.2', '<' ) ) {
				self::upgrade_3_2_2();
			}

			if ( version_compare( $version, '3.2.2.1', '<' ) ) {
				self::upgrade_3_2_2_1();
			}

			if ( version_compare( $version, '3.3.2', '<' ) ) {
				self::upgrade_3_3_2();
			}

			if ( version_compare( $version, '3.4.0', '<' ) ) {
				self::upgrade_3_4();
			}

			// Create/upgrade directory smush table.
			self::directory_smush_table();

			// Store the latest plugin version in db.
			update_site_option( WP_SMUSH_PREFIX . 'version', WP_SMUSH_VERSION );
		}
	}

	/**
	 * Create or upgrade custom table for directory Smush.
	 *
	 * After creating or upgrading the custom table, update the path_hash
	 * column value and structure if upgrading from old version.
	 *
	 * @since 2.9.0
	 */
	public static function directory_smush_table() {
		// Create a class object, if doesn't exists.
		if ( ! is_object( WP_Smush::get_instance()->core()->mod->dir ) ) {
			WP_Smush::get_instance()->core()->mod->dir = new Modules\Dir();
		}

		// No need to continue on sub sites.
		if ( ! Modules\Dir::should_continue() ) {
			return;
		}

		// Create/upgrade directory smush table.
		WP_Smush::get_instance()->core()->mod->dir->create_table();
	}

	/**
	 * Update settings to new structure.
	 *
	 * @since 3.0
	 */
	private static function upgrade_3_0() {
		$keys = array(
			'networkwide',
			'auto',
			'lossy',
			'strip_exif',
			'resize',
			'detection',
			'original',
			'backup',
			'png_to_jpg',
			'nextgen',
			'gutenberg',
			's3',
		);

		if ( is_multisite() && ! get_site_option( WP_SMUSH_PREFIX . 'networkwide' ) ) {
			global $wpdb;

			$offset = 0;
			$limit  = 100;

			while ( $blogs = $wpdb->get_results( "SELECT blog_id FROM {$wpdb->blogs} LIMIT $offset, $limit", ARRAY_A ) ) {
				if ( $blogs ) {
					foreach ( $blogs as $blog ) {
						switch_to_blog( $blog['blog_id'] );

						$settings = get_option( WP_SMUSH_PREFIX . 'last_settings', array() );
						$settings = array_merge( Settings::get_instance()->get(), maybe_unserialize( $settings ) );
						update_option( WP_SMUSH_PREFIX . 'settings', $settings );
						// Remove previous data.
						delete_option( WP_SMUSH_PREFIX . 'last_settings' );

						foreach ( $keys as $key ) {
							delete_option( WP_SMUSH_PREFIX . $key );
						}
					}
					restore_current_blog();
				}
				$offset += $limit;
			}
		} else {
			// last_settings will be an array if user had any custom settings.
			$settings = get_site_option( WP_SMUSH_PREFIX . 'last_settings', array() );
			if ( is_array( $settings ) ) {
				$settings = array_merge( Settings::get_instance()->get(), $settings );
			} else {
				// last_settings will be a string if the Smush page hasn't been visited => get the new defaults.
				$settings = Settings::get_instance()->get();
			}

			update_site_option( WP_SMUSH_PREFIX . 'settings', $settings );
			// Remove previous data.
			delete_site_option( WP_SMUSH_PREFIX . 'last_settings' );

			foreach ( $keys as $key ) {
				delete_site_option( WP_SMUSH_PREFIX . $key );
			}
		}
	}

	/**
	 * Upgrade to 3.2.0.
	 *
	 * @since 3.2.0
	 */
	private static function upgrade_3_2_0() {
		// Not used.
		delete_option( 'smush_option' );
	}

	/**
	 * Upgrade to 3.2.2
	 *
	 * @since 3.2.2
	 */
	private static function upgrade_3_2_2() {
		// Show the upgrade notice for everyone.
		delete_site_option( WP_SMUSH_PREFIX . 'hide_upgrade_notice' );

		// Add new lazy-load options.
		$lazy = Settings::get_instance()->get_setting( WP_SMUSH_PREFIX . 'lazy_load' );

		if ( ! $lazy ) {
			return;
		}

		$selected = 'fadein';
		if ( $lazy['animation']['spinner'] ) {
			$selected = 'spinner';
		} elseif ( $lazy['animation']['disabled'] ) {
			$selected = false;
		}

		$animation = array(
			'selected'    => $selected,
			'fadein'      => array(
				'duration' => isset( $lazy['animation']['duration'] ) ? $lazy['animation']['duration'] : 400,
				'delay'    => isset( $lazy['animation']['delay'] ) ? $lazy['animation']['delay'] : 0,
			),
			'spinner'     => array(
				'selected' => 1,
				'custom'   => array(),
			),
			'placeholder' => array(
				'selected' => 1,
				'custom'   => array(),
				'color'    => '#F3F3F3',
			),
		);

		$lazy['animation'] = $animation;

		Settings::get_instance()->set_setting( WP_SMUSH_PREFIX . 'lazy_load', $lazy );
	}

	/**
	 * Upgrade to 3.2.2.1
	 *
	 * Fix the network wide access upgrade.
	 *
	 * @since 3.2.2.1
	 */
	private static function upgrade_3_2_2_1() {
		if ( ! is_multisite() ) {
			return;
		}

		wp_cache_flush();
		$network_enabled = get_site_option( WP_SMUSH_PREFIX . 'networkwide' );
		update_site_option( WP_SMUSH_PREFIX . 'networkwide', ! ( '1' === $network_enabled ) );
		wp_cache_flush();
	}

	/**
	 * Show notice on upgrade.
	 *
	 * @since 3.3.2
	 */
	private static function upgrade_3_3_2() {
		$install_type = get_site_option( 'wp-smush-install-type', false );
		if ( 'existing' === $install_type ) {
			set_site_transient( 'wp-smush-update-modal', true, 3600 );
		}
	}

	/**
	 * Adds new lazy load iframe setting.
	 *
	 * @since 3.4.0
	 */
	private static function upgrade_3_4() {
		// Add new lazy-load options.
		$lazy = Settings::get_instance()->get_setting( WP_SMUSH_PREFIX . 'lazy_load' );

		if ( ! $lazy ) {
			return;
		}

		$lazy['format']['iframe'] = true;

		Settings::get_instance()->set_setting( WP_SMUSH_PREFIX . 'lazy_load', $lazy );
	}

}