<?php

use WPML\FP\Obj;

/**
 * Class WCML_Currency_Switcher_Ajax
 */
class WCML_Currency_Switcher_Ajax {

	private $woocommerce_wpml;

	/**
	 * WCML_Currency_Switcher_Ajax constructor.
	 *
	 * @param woocommerce_wpml $woocommerce_wpml
	 */
	public function __construct( $woocommerce_wpml ) {
		$this->woocommerce_wpml = $woocommerce_wpml;

		add_action( 'wp_ajax_wcml_currencies_order', [ $this, 'wcml_currencies_order' ] );
		add_action( 'wp_ajax_wcml_currencies_switcher_preview', [ $this, 'wcml_currencies_switcher_preview' ] );
		add_action( 'wp_ajax_wcml_currencies_switcher_save_settings', [ $this, 'wcml_currencies_switcher_save_settings' ] );
		add_action( 'wp_ajax_wcml_delete_currency_switcher', [ $this, 'wcml_delete_currency_switcher' ] );
	}

	public function wcml_currencies_order() {
		$nonce = array_key_exists( 'wcml_nonce', $_POST ) ? sanitize_text_field( $_POST['wcml_nonce'] ) : false;
		if ( ! $nonce || ! wp_verify_nonce( $nonce, 'set_currencies_order_nonce' ) ) {
			wp_send_json_error( 'Invalid nonce' );
		}

		$this->woocommerce_wpml->settings['currencies_order'] = explode( ';', $_POST['order'] );
		$this->woocommerce_wpml->update_settings( $this->woocommerce_wpml->settings );
		wp_send_json_success( [ 'message' => esc_html__( 'Currencies order updated', 'woocommerce-multilingual' ) ] );
	}

	public function wcml_currencies_switcher_save_settings() {
		$nonce = array_key_exists( 'wcml_nonce', $_POST ) ? sanitize_text_field( $_POST['wcml_nonce'] ) : false;
		if ( ! $nonce || ! wp_verify_nonce( $nonce, 'wcml_currencies_switcher_save_settings' ) ) {
			wp_send_json_error( 'Invalid nonce' );
		}
		$wcml_settings     = $this->woocommerce_wpml->settings;
		$switcher_settings = [];

		// Allow some HTML in the currency switcher
		$currency_switcher_format = strip_tags( stripslashes_deep( $_POST['template'] ), '<img><span><u><strong><em>' );
		$currency_switcher_format = htmlentities( $currency_switcher_format );
		$currency_switcher_format = sanitize_text_field( $currency_switcher_format );
		$currency_switcher_format = html_entity_decode( $currency_switcher_format );

		$switcher_id = sanitize_text_field( $_POST['switcher_id'] );
		if ( $switcher_id == 'new_widget' ) {
			$switcher_id = sanitize_text_field( $_POST['widget_id'] );

		}

		$switcher_settings['widget_title']   = isset( $_POST['widget_title'] ) ? sanitize_text_field( $_POST['widget_title'] ) : '';
		$switcher_settings['switcher_style'] = sanitize_text_field( $_POST['switcher_style'] );
		$switcher_settings['template']       = $currency_switcher_format;

		do_action( 'wpml_register_single_string', 'woocommerce-multilingual', $switcher_id . '_switcher_format', $currency_switcher_format );

		foreach ( $_POST['color_scheme'] as $color_id => $color ) {
			$switcher_settings['color_scheme'][ sanitize_text_field( $color_id ) ] = sanitize_hex_color( $color );
		}

		$wcml_settings['currency_switchers'][ $switcher_id ] = $switcher_settings;

		// update widget settings
		if ( $switcher_id !== 'product' ) {
			$widget_settings = get_option( 'widget_currency_sel_widget' );
			$setting_match   = false;
			foreach ( $widget_settings as $key => $widget_setting ) {
				if ( isset( $widget_setting['id'] ) && $switcher_id == $widget_setting['id'] ) {
					$setting_match                       = true;
					$widget_settings[ $key ]['settings'] = $switcher_settings;
				}
			}

			if ( ! $setting_match ) {
				$widget_settings[] = [
					'id'       => $switcher_id,
					'settings' => $switcher_settings,
				];
			}

			update_option( 'widget_currency_sel_widget', $widget_settings );

			$this->synchronize_widget_instances( $widget_settings );
		}

		$this->woocommerce_wpml->update_settings( $wcml_settings );

		wp_send_json_success();
	}

	private function synchronize_widget_instances( $widget_settings ) {

		$sidebars_widgets = $this->get_sidebars_widgets();

		foreach ( $sidebars_widgets as $sidebar => $widgets ) {
			if ( 'wp_inactive_widgets' === $sidebar ) {
				continue;
			}

			$found = false;
			if ( is_array( $widgets ) ) {
				foreach ( $widgets as $key => $widget_id ) {
					if ( strpos( $widget_id, WCML_Currency_Switcher_Widget::SLUG ) === 0 ) {

						if ( $found ) { // Only synchronize the first CS widget instance per sidebar
							unset( $sidebars_widgets[ $sidebar ][ $key ] );
							continue;
						}

						$found = true;

					}
				}
			}

			if ( ! $found ) {

				foreach ( $widget_settings as $key => $widget_setting ) {
					if ( is_array( $widget_setting ) && Obj::prop( 'id', $widget_setting ) == $sidebar ) {
						array_unshift( $sidebars_widgets[ $sidebar ], WCML_Currency_Switcher_Widget::SLUG . '-' . $key );
					}
				}
			}
		}

		$this->update_sidebars_widgets( $sidebars_widgets );

	}

	public function wcml_delete_currency_switcher() {
		$nonce = array_key_exists( 'wcml_nonce', $_POST ) ? sanitize_text_field( $_POST['wcml_nonce'] ) : false;
		if ( ! $nonce || ! wp_verify_nonce( $nonce, 'delete_currency_switcher' ) ) {
			wp_send_json_error();
		}

		$switcher_id = sanitize_text_field( $_POST['switcher_id'] );

		$wcml_settings = $this->woocommerce_wpml->get_settings();

		unset( $wcml_settings['currency_switchers'][ $switcher_id ] );

		$this->woocommerce_wpml->update_settings( $wcml_settings );

		$sidebars_widgets = $this->get_sidebars_widgets();

		foreach ( $sidebars_widgets as $sidebar => $widgets ) {
			if ( $sidebar != $switcher_id ) {
				continue;
			}

			if ( is_array( $widgets ) ) {
				foreach ( $widgets as $key => $widget_id ) {
					if ( strpos( $widget_id, WCML_Currency_Switcher_Widget::SLUG ) === 0 ) {
						unset( $sidebars_widgets[ $sidebar ][ $key ] );
					}
				}
			}
		}

		$this->update_sidebars_widgets( $sidebars_widgets );

		wp_send_json_success();
	}

	public function wcml_currencies_switcher_preview() {
		$nonce = array_key_exists( 'wcml_nonce', $_POST ) ? sanitize_text_field( $_POST['wcml_nonce'] ) : false;
		if ( ! $nonce || ! wp_verify_nonce( $nonce, 'wcml_currencies_switcher_preview' ) ) {
			wp_send_json_error( 'Invalid nonce' );
		}
		$return = [];

		$inline_css = $this->woocommerce_wpml->cs_templates->get_color_picket_css(
			$_POST['switcher_id'],
			[
				'switcher_style' => $_POST['switcher_style'],
				'color_scheme'   => $_POST['color_scheme'],
			]
		);

		$template = $this->woocommerce_wpml->cs_templates->get_template( $_POST['switcher_style'] );

		if ( $template->has_styles() ) {
			$return['inline_styles_id'] = $template->get_inline_style_handler() . '-inline-css';
		} else {
			$return['inline_styles_id'] = 'wcml-cs-inline-styles-' . $_POST['switcher_id'] . '-' . $_POST['switcher_style'];
		}

		$return['inline_css'] = $inline_css;

		ob_start();
		$this->woocommerce_wpml->multi_currency->currency_switcher->wcml_currency_switcher(
			[
				'switcher_id'    => $_POST['switcher_id'],
				'format'         => isset( $_POST['template'] ) ? stripslashes_deep( $_POST['template'] ) : '%name% (%symbol%) - %code%',
				'switcher_style' => $_POST['switcher_style'],
				'color_scheme'   => $_POST['color_scheme'],
				'preview'        => true,
			]
		);
		$switcher_preview = ob_get_contents();
		ob_end_clean();

		$return['preview'] = $switcher_preview;

		wp_send_json_success( $return );
	}

	public function get_sidebars_widgets() {
		if ( ! function_exists( 'wp_get_sidebars_widgets' ) ) {
			require_once ABSPATH . '/wp-admin/includes/widgets.php';
		}
		$sidebars_widgets = wp_get_sidebars_widgets();

		return is_array( $sidebars_widgets ) ? $sidebars_widgets : [];
	}
	public function update_sidebars_widgets( $sidebars_widgets ) {
		remove_action( 'pre_update_option_sidebars_widgets', [ $this->woocommerce_wpml->multi_currency->currency_switcher, 'update_option_sidebars_widgets' ], 10 );

		wp_set_sidebars_widgets( $sidebars_widgets );

		add_action( 'pre_update_option_sidebars_widgets', [ $this->woocommerce_wpml->multi_currency->currency_switcher, 'update_option_sidebars_widgets' ], 10, 2 );
	}
}