<?php

namespace TotalTheme\Admin;

\defined( 'ABSPATH' ) || exit;

/**
 * Creates the admin panel for the customizer.
 */
class Import_Export {

	/**
	 * Instance.
	 */
	private static $instance;

	/**
	 * Create or retrieve the instance of Import_Export.
	 */
	public static function instance() {
		if ( is_null( static::$instance ) ) {
			static::$instance = new self();
			static::$instance->init_hooks();
		}

		return static::$instance;
	}

	/**
	 * Hook into actions and filters.
	 */
	public function init_hooks() {
		\add_action( 'admin_menu', [ $this, 'add_admin_submenu_page' ], 9999 );
		\add_action( 'admin_init', [ $this, 'register_settings' ] );
	}

	/**
	 * Add sub menu page.
	 */
	public function add_admin_submenu_page() {
		$hook_suffix = \add_submenu_page(
			\WPEX_THEME_PANEL_SLUG,
			\esc_attr__( 'Import/Export', 'total' ),
			\esc_attr__( 'Import/Export', 'total' ),
			'edit_theme_options',
			\WPEX_THEME_PANEL_SLUG . '-import-export',
			[ $this, 'render_admin_page' ]
		);

		add_action( "admin_print_scripts-{$hook_suffix}", [ $this, 'enqueue_scripts' ] );
	}

	/**
	 * Register a setting and its sanitization callback.
	 */
	public function register_settings() {
		\register_setting(
			'wpex_customizer_options',
			'wpex_customizer_options',
			[
				'sanitize_callback' => [ $this, 'save_options' ],
				'default' => null,
			]
		);
	}

	/**
	 * Register scripts.
	 */
	public function enqueue_scripts() {
		\wp_enqueue_script(
			'totaltheme-admin-import-export',
			\wpex_asset_url( 'js/admin/import-export.min.js' ),
			[ 'jquery' ],
			\WPEX_THEME_VERSION,
			true
		);

		\wp_localize_script( 'totaltheme-admin-import-export', 'totaltheme_admin_import_export_vars', array(
			'confirmReset'  => esc_html__( 'Confirm Reset', 'total' ),
			'importOptions' => esc_html__( 'Import Options', 'total' ),
		) );
	}

	/**
	 * Save options.
	 */
	public function save_options( $options ) {
		if ( $options ) {

			// Delete options if import set to -1.
			if ( isset( $options['reset'] ) && '-1' == $options['reset'] ) {

				// Get menu locations.
				$locations 	= \get_theme_mod( 'nav_menu_locations' );
				$save_menus	= [];

				if ( $locations ) {
					foreach ( $locations as $key => $val ) {
						$save_menus[$key] = $val;
					}
				}

				// Get sidebars.
				$widget_areas = \get_theme_mod( 'widget_areas' );

				// Remove all mods.
				\remove_theme_mods();

				// WP fix. Logo doesn't get removed with \remove_theme_mods();
				\set_theme_mod( 'custom_logo', '' );
				\remove_theme_mod( 'custom_logo' );

				// Re-add the menus.
				\set_theme_mod( 'nav_menu_locations', array_map( 'absint', $save_menus ) );
				\set_theme_mod( 'widget_areas', $widget_areas );

				// Error messages.
				$error_msg	= \esc_attr__( 'All settings have been reset.', 'total' );
				$error_type	= 'updated';

			}
			// Set theme mods based on json data.
			elseif ( ! empty( $options['import'] ) ) {

				// Decode input data.
				$theme_mods = \json_decode( $options['import'], true );

				// Validate json file then set new theme options.
				if ( function_exists( 'json_last_error' ) && \defined( 'JSON_ERROR_NONE' ) ) {
					if ( JSON_ERROR_NONE === \json_last_error() ) {
						// Loop through mods and add them.
						foreach ( $theme_mods as $theme_mod => $value ) {
							\set_theme_mod( $theme_mod, $value );
						}

						// Success message.
						$error_msg  = \esc_attr__( 'Settings imported successfully.', 'total' );
						$error_type = 'updated';
					}

					// Display invalid json data error.
					else {
						$error_msg  = \esc_attr__( 'Invalid Import Data.', 'total' );
						$error_type = 'error';
					}

				} else {
					$error_msg  = \esc_attr__( 'The version of PHP on your server is very outdated and can not support a proper import. Please make sure your server has been updated to the WordPress "supported" version of PHP.', 'total' );
					$error_type = 'error';
				}

			}

			// No json data entered.
			else {
				$error_msg = \esc_attr__( 'No import data found.', 'total' );
				$error_type = 'error';
			}

		}

	}

	/**
	 * Settings page output.
	 */
	public function render_admin_page() {
		if ( ! \current_user_can( 'edit_theme_options' ) ) {
			return;
		}

		$default_options = [
			'import' => '',
			'reset'  => '',
		];

		$options = \get_option( 'wpex_customizer_options', $default_options );
		?>

		<div class="wpex-theme-import-export wrap">

			<?php
			// Need to insert h1 for notices.
			echo '<h1 style="display:none;" aria-hidden="true"></h1>'; ?>

			<div class="notice notice-warning"><p><?php \esc_html_e( 'This will export/import/delete ALL theme_mods that means if other plugins are adding settings in the Customizer it will export/import/delete those as well.', 'total' ); ?></p></div>

			<form method="post" action="options.php">
				<?php \settings_fields( 'wpex_customizer_options' ); ?>
				<table class="form-table">
					<tr valign="top">
						<th scope="row"><?php \esc_html_e( 'Export Settings', 'total' ); ?></th>
						<td>
							<?php
							// Get an array of all the theme mods.
							if ( $theme_mods = \get_theme_mods() ) {
								$mods = [];
								foreach ( $theme_mods as $theme_mod => $value ) {
									$mods[$theme_mod] = \maybe_unserialize( $value );
								}
								$json = \json_encode( $mods );
								$disabled = '';
							} else {
								$json     = \esc_attr__( 'No Settings Found', 'total' );
								$disabled = ' disabled';
							}
							echo '<textarea class="wpex-theme-import-export__settings" rows="10" cols="50" readonly style="width:100%;">' . $json . '</textarea>'; ?>
							<p class="submit">
								<a href="#" class="wpex-theme-import-export__highlight button-primary<?php echo \esc_attr( $disabled ); ?>"><?php \esc_html_e( 'Highlight Options', 'total' ); ?></a>
							</p>
						</td>
					</tr>
					<tr valign="top">
						<th scope="row"><?php \esc_html_e( 'Import Settings', 'total' ); ?></th>
						<td>
							<textarea name="wpex_customizer_options[import]" rows="10" cols="50" style="width:100%;"></textarea>
							<input class="wpex-theme-import-export__reset" name="wpex_customizer_options[reset]" type="hidden" value=""></input>
							<p class="submit">
								<input type="submit" class="wpex-theme-import-export__submit button-primary" value="<?php \esc_attr_e( 'Import Options', 'total' ) ?>">
								<a href="#" class="wpex-theme-import-export__delete button-secondary"><?php \esc_html_e( 'Reset Options', 'total' ); ?></a>
								<a href="#" class="wpex-theme-import-export__delete-cancel button-secondary" style="display:none;"><?php \esc_html_e( 'Cancel Reset', 'total' ); ?></a>
							</p>
							<div class="wpex-theme-import-export__warning error inline" style="display:none;">
								<p style="margin:.5em 0;"><?php \esc_attr_e( 'Always make sure you have a backup of your settings before resetting, just incase! Your menu locations and widget areas will not reset and will remain intact. All customizer and addon settings will reset.', 'total' ); ?></p>
							</div>
						</td>
					</tr>
				</table>
			</form>
		</div>
	<?php }

}