<?php
/**
 * Handle admin POST actions for AI Content by Parallax.
 *
 * @package AIContentByParallax
 */

namespace AIContentByParallax\Admin;

defined( 'ABSPATH' ) || exit;

use AIContentByParallax\Config\Messages;
use AIContentByParallax\Features\OriginalSnapshot;

/**
 * Processes admin form submissions.
 */
class PostRequestHandlers {
	/**
	 * Configuration map for POST actions.
	 *
	 * @var array<string, array<string,string>>
	 **/
	protected static array $config = array();

	/**
	 * Wire up all POST actions for this class in one place.
	 *
	 * @return void
	 */
	public static function register(): void {
		$map = array(
			// action => [method, required_cap, nonce_action, nonce_field].
			'ai_content_by_parallax_restore_all_originals' => array( 'handle_restore_all_originals', 'manage_options', 'ai_content_by_parallax_restore_all_originals', '_wpnonce' ),
			'ai_content_by_parallax_restore_products_originals' => array( 'handle_restore_products_originals', 'manage_options', 'ai_content_by_parallax_restore_products_originals', '_wpnonce' ),
			'ai_content_by_parallax_restore_categories_originals' => array( 'handle_restore_categories_originals', 'manage_options', 'ai_content_by_parallax_restore_categories_originals', '_wpnonce' ),
			'ai_content_by_parallax_retake_original_snapshots' => array( 'handle_retake_original_snapshots', 'manage_options', 'ai_content_by_parallax_retake_original_snapshots', '_wpnonce' ),
		);

		foreach ( $map as $action => [$method, $cap, $nonce_action, $nonce_field] ) {
			add_action( "admin_post_{$action}", array( self::class, $method ) );
			self::$config[ $action ] = compact( 'cap', 'nonce_action', 'nonce_field' );
		}
	}

	/**
	 * Handle the "Reset to Originals" button click
	 *
	 * @return void
	 */
	public static function handle_restore_all_originals() {
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_die( esc_html( Messages::get( 'ajax.insufficient_perms' ) ) );
		}
		check_admin_referer( 'ai_content_by_parallax_restore_all_originals' );

		if ( function_exists( 'wp_raise_memory_limit' ) ) {
			wp_raise_memory_limit( 'admin' );
		}

		// Run restore.
		[$restored_products, $restored_terms] = OriginalSnapshot::restore_all_from_originals();

		// Set transient to show notice on next page load.
		update_option( 'ai_content_by_parallax_show_reset_notice', 1, false );

		$nonce = wp_create_nonce( 'parallax_restore_notice' );

		// Redirect with result counts.
		$redirect = wp_get_referer();
		if ( $redirect ) {
			$redirect = remove_query_arg( array( 'ai_content_by_parallax_restored', 'p', 't' ), $redirect );
		} else {
			$redirect = admin_url( 'index.php' );
		}

		wp_safe_redirect(
			add_query_arg(
				array(
					'ai_content_by_parallax_restored' => 1,
					'p'                               => $restored_products,
					't'                               => $restored_terms,
					'_wpnonce'                        => $nonce,
				),
				$redirect
			)
		);
		exit;
	}

	/**
	 * Handle the "Reset to Originals (Products)" button click.
	 *
	 * @return void
	 */
	public static function handle_restore_products_originals() {
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_die( esc_html( Messages::get( 'ajax.insufficient_perms' ) ) );
		}
		check_admin_referer( 'ai_content_by_parallax_restore_products_originals' );

		if ( function_exists( 'wp_raise_memory_limit' ) ) {
			wp_raise_memory_limit( 'admin' );
		}

		$restored_products = OriginalSnapshot::restore_products_from_originals();

		update_option( 'ai_content_by_parallax_show_reset_notice', 1, false );

		$redirect = wp_get_referer();
		if ( $redirect ) {
			$redirect = remove_query_arg( array( 'ai_content_by_parallax_restored', 'p', 't' ), $redirect );
		} else {
			$redirect = admin_url( 'index.php' );
		}

		wp_safe_redirect(
			add_query_arg(
				array(
					'ai_content_by_parallax_restored' => 1,
					'p'                               => $restored_products,
					't'                               => 0,
					'_wpnonce'                        => wp_create_nonce( 'parallax_restore_notice' ),
				),
				$redirect
			)
		);
		exit;
	}

	/**
	 * Handle the "Reset to Originals (Categories)" button click.
	 *
	 * @return void
	 */
	public static function handle_restore_categories_originals() {
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_die( esc_html( Messages::get( 'ajax.insufficient_perms' ) ) );
		}
		check_admin_referer( 'ai_content_by_parallax_restore_categories_originals' );

		if ( function_exists( 'wp_raise_memory_limit' ) ) {
			wp_raise_memory_limit( 'admin' );
		}

		$restored_terms = OriginalSnapshot::restore_categories_from_originals();

		update_option( 'ai_content_by_parallax_show_reset_notice', 1, false );

		$redirect = wp_get_referer();
		if ( $redirect ) {
			$redirect = remove_query_arg( array( 'ai_content_by_parallax_restored', 'p', 't' ), $redirect );
		} else {
			$redirect = admin_url( 'index.php' );
		}

		wp_safe_redirect(
			add_query_arg(
				array(
					'ai_content_by_parallax_restored' => 1,
					'p'                               => 0,
					't'                               => $restored_terms,
					'_wpnonce'                        => wp_create_nonce( 'parallax_restore_notice' ),
				),
				$redirect
			)
		);
		exit;
	}

	/**
	 * Handle the "Retake Product Data Snapshot" button click
	 *
	 * @return void
	 */
	public static function handle_retake_original_snapshots() {
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_die( esc_html( Messages::get( 'ajax.insufficient_perms' ) ) );
		}
		check_admin_referer( 'ai_content_by_parallax_retake_original_snapshots' );

		if ( function_exists( 'wp_raise_memory_limit' ) ) {
			wp_raise_memory_limit( 'admin' );
		}

		[$products, $terms] = OriginalSnapshot::retake_original_snapshots();

		// Show the reset banner again so admins know snapshots are fresh.
		update_option( 'ai_content_by_parallax_show_reset_notice', 1, false );

		$redirect = wp_get_referer();
		if ( $redirect ) {
			$redirect = remove_query_arg( array( 'ai_content_by_parallax_retake', 'rp', 'rt' ), $redirect );
		} else {
			$redirect = admin_url( 'index.php' );
		}

		wp_safe_redirect(
			add_query_arg(
				array(
					'ai_content_by_parallax_retake' => 1,
					'rp'                            => $products,
					'rt'                            => $terms,
					'_wpnonce'                      => wp_create_nonce( 'parallax_retake_notice' ),
				),
				$redirect
			)
		);
		exit;
	}
}