<?php

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

require_once AIEO_DIR . 'includes/seo/class-aieo-dfs-backlinks.php';

class AIEO_DMM_SEO_Backlinks extends AIEO_DMM_Module_Base {

	public function get_id()       { return 'seo_backlinks'; }
	public function get_icon()     { return 'link'; }
	public function get_label()    { return __( 'Backlinks', 'ai-eshop-optimizer' ); }
	public function get_priority() { return 8; }
	public function get_group()    { return 'seo'; }
	public function get_section()  { return 'linking'; }

	public function register_hooks() {
		add_action( 'wp_ajax_aieo_seo_backlinks_refresh', array( $this, 'ajax_refresh' ) );
		add_action( 'wp_ajax_aieo_seo_disavow_action', array( $this, 'ajax_disavow_action' ) );
		add_action( 'admin_post_aieo_seo_disavow_download', array( $this, 'download_disavow' ) );
	}

	private function guard() {
		AIEO_DMM::verify_ajax_request();
		if ( ! current_user_can( 'manage_woocommerce' ) && ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => __( 'Insufficient permissions.', 'ai-eshop-optimizer' ) ) );
		}
	}

	
	public function ajax_refresh() {
		$this->guard();
		$res = AIEO_DFS_Backlinks::refresh( 300 );
		if ( is_wp_error( $res ) ) {
			wp_send_json_error( array( 'message' => $res->get_error_message() ) );
		}
		wp_send_json_success( array(
			'message' => sprintf(
				
				__( 'Fetched %d referring domains.', 'ai-eshop-optimizer' ),
				(int) $res['stored']
			),
		) );
	}

	
	public function ajax_disavow_action() {
		$this->guard();
		
		$op     = isset( $_POST['op'] ) ? sanitize_key( wp_unslash( $_POST['op'] ) ) : '';
		$domain = isset( $_POST['domain'] ) ? sanitize_text_field( wp_unslash( $_POST['domain'] ) ) : '';

		if ( 'add' === $op && '' !== $domain ) {
			AIEO_DFS_Backlinks::disavow_add( $domain, __( 'Flagged in Backlinks', 'ai-eshop-optimizer' ) );
			wp_send_json_success( array( 'disavowed' => true ) );
		}
		if ( 'remove' === $op && '' !== $domain ) {
			AIEO_DFS_Backlinks::disavow_remove( $domain );
			wp_send_json_success( array( 'disavowed' => false ) );
		}
		if ( 'disavow_all_toxic' === $op ) {
			$n = AIEO_DFS_Backlinks::disavow_all_toxic();
			wp_send_json_success( array(
				'message' => sprintf(
					
					__( 'Added %d toxic domains to the disavow list.', 'ai-eshop-optimizer' ),
					(int) $n
				),
			) );
		}
		wp_send_json_error( array( 'message' => __( 'Invalid action.', 'ai-eshop-optimizer' ) ) );
	}

	
	public function download_disavow() {
		if ( ! current_user_can( 'manage_woocommerce' ) && ! current_user_can( 'manage_options' ) ) {
			wp_die( esc_html__( 'Insufficient permissions.', 'ai-eshop-optimizer' ) );
		}
		$nonce = isset( $_GET['nonce'] ) ? sanitize_text_field( wp_unslash( $_GET['nonce'] ) ) : '';
		if ( ! wp_verify_nonce( $nonce, AIEO_DMM::NONCE_ACTION ) ) {
			wp_die( esc_html__( 'Security check failed.', 'ai-eshop-optimizer' ) );
		}
		$host = preg_replace( '/[^a-z0-9.-]/', '_', (string) AIEO_DFS_Backlinks::target() );
		nocache_headers();
		header( 'Content-Type: text/plain; charset=utf-8' );
		header( 'Content-Disposition: attachment; filename="disavow-' . $host . '.txt"' );
		echo AIEO_DFS_Backlinks::disavow_file(); 
		exit;
	}

	public function render_subtab() {
		AIEO_DFS_Backlinks::ensure_tables();
		$this->render_template(
			'seo/backlinks.php',
			array(
				'available'   => AIEO_DFS_Backlinks::available(),
				'summary'     => AIEO_DFS_Backlinks::cached_summary(),
				'domains'     => AIEO_DFS_Backlinks::referring_domains( 200 ),
				'threshold'   => AIEO_DFS_Backlinks::toxic_threshold(),
				'disavow_n'   => AIEO_DFS_Backlinks::disavow_count(),
				'last'        => get_option( AIEO_DFS_Backlinks::LAST_OPT, '' ),
				'tool_url'    => AIEO_DFS_Backlinks::disavow_tool_url(),
				'download'    => wp_nonce_url( admin_url( 'admin-post.php?action=aieo_seo_disavow_download' ), AIEO_DMM::NONCE_ACTION, 'nonce' ),
				'nonce'       => wp_create_nonce( AIEO_DMM::NONCE_ACTION ),
				'ajax'        => admin_url( 'admin-ajax.php' ),
			)
		);
	}
}