<?php
/**
 * Plugin Name: AIT Easy Post Customization
 * Description: Manage post expiry dates, custom fields, email notifications, and more — with a premium dashboard design.
 * Version: 2.1.0
 * Author: Muhammad Kamran
 * License: GPL-2.0-or-later
 * Text Domain: ait-easy-post-customization
 * Requires at least: 5.0
 * Requires PHP: 7.4
 * Tested up to: 6.8
 */

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

// ---------------------------------------------------------------------------
// Activation hook
// ---------------------------------------------------------------------------

register_activation_hook( __FILE__, 'aitepc_expiry_date_plugin_activate' );
/**
 * On activation: seed default options and schedule daily cron events.
 */
function aitepc_expiry_date_plugin_activate() {
	if ( ! get_option( 'aitepc_expiry_date_post_types' ) ) {
		update_option( 'aitepc_expiry_date_post_types', array( 'post' ) );
	}

	// Cron: check for expired posts and apply expiry actions.
	if ( ! wp_next_scheduled( 'aitepc_check_expiry_date_event' ) ) {
		wp_schedule_event( time(), 'daily', 'aitepc_check_expiry_date_event' );
	}

	// Cron: send advance notification emails.
	if ( ! wp_next_scheduled( 'aitepc_check_expiry_notifications_event' ) ) {
		wp_schedule_event( time(), 'daily', 'aitepc_check_expiry_notifications_event' );
	}
}

// ---------------------------------------------------------------------------
// Deactivation hook
// ---------------------------------------------------------------------------

register_deactivation_hook( __FILE__, 'aitepc_expiry_date_plugin_deactivate' );
/**
 * On deactivation: clear all plugin cron events.
 */
function aitepc_expiry_date_plugin_deactivate() {
	$hooks = array(
		'aitepc_check_expiry_date_event',
		'aitepc_check_expiry_notifications_event',
	);

	foreach ( $hooks as $hook ) {
		$timestamp = wp_next_scheduled( $hook );
		if ( $timestamp ) {
			wp_unschedule_event( $timestamp, $hook );
		}
	}
}

// ---------------------------------------------------------------------------
// Cron: process expired posts
// ---------------------------------------------------------------------------

add_action( 'aitepc_check_expiry_date_event', 'aitepc_check_expired_posts' );
/**
 * Find all published posts whose expiry date has passed and apply the
 * configured expiry action (draft, trash, delete, or redirect).
 *
 * Delegates to aitepc_process_expiry_action() so the action can be
 * configured per-post or site-wide from the settings page.
 */
function aitepc_check_expired_posts() {
	$post_types = get_option( 'aitepc_expiry_date_post_types', array( 'post' ) );
	$tomorrow   = gmdate( 'Y-m-d', strtotime( '+1 day' ) );

	$args = array(
		'post_type'      => $post_types,
		'post_status'    => 'publish',
		'posts_per_page' => -1,
		'fields'         => 'ids',
		'no_found_rows'  => true,
		'meta_query'     => array(
			array(
				'key'     => '_aitepc_expiry_date',
				'value'   => $tomorrow,
				'compare' => '<',
				'type'    => 'DATE',
			),
		),
	);

	$expired_ids = get_posts( $args );

	foreach ( $expired_ids as $post_id ) {
		aitepc_process_expiry_action( $post_id );
	}
}

// ---------------------------------------------------------------------------
// Register post meta for REST / Gutenberg
// ---------------------------------------------------------------------------

add_action( 'init', 'aitepc_register_post_meta' );
/**
 * Expose plugin post-meta keys to the REST API so the Gutenberg sidebar
 * can read and write them via the core/editor data store.
 * Called on 'init' to ensure post types are registered first.
 */
function aitepc_register_post_meta() {
	$post_types = get_option( 'aitepc_expiry_date_post_types', array( 'post' ) );
	if ( empty( $post_types ) || ! is_array( $post_types ) ) {
		return;
	}

	$meta_configs = array(
		'_aitepc_expiry_date'   => array(
			'type'              => 'string',
			'sanitize_callback' => 'sanitize_text_field',
			'description'       => 'Post expiry date (Y-m-d)',
		),
		'_aitepc_expiry_action' => array(
			'type'              => 'string',
			'sanitize_callback' => 'sanitize_key',
			'description'       => 'Action taken when the post expires',
		),
		'_aitepc_redirect_url'  => array(
			'type'              => 'string',
			'sanitize_callback' => 'esc_url_raw',
			'description'       => 'Redirect destination URL (used with redirect action)',
		),
	);

	foreach ( $post_types as $post_type ) {
		foreach ( $meta_configs as $meta_key => $config ) {
			register_meta(
				'post',
				$meta_key,
				array(
					'object_subtype'    => $post_type,
					'type'              => $config['type'],
					'description'       => $config['description'],
					'single'            => true,
					'show_in_rest'      => true,
					'sanitize_callback' => $config['sanitize_callback'],
					'auth_callback'     => static function () {
						return current_user_can( 'edit_posts' );
					},
				)
			);
		}
	}
}

// ---------------------------------------------------------------------------
// Translations
// ---------------------------------------------------------------------------

add_action( 'plugins_loaded', 'aitepc_load_textdomain' );
/**
 * Load plugin text domain for translations.
 */
function aitepc_load_textdomain() {
	load_plugin_textdomain(
		'ait-easy-post-customization',
		false,
		dirname( plugin_basename( __FILE__ ) ) . '/languages'
	);
}

// ---------------------------------------------------------------------------
// Settings API: post-type selection
// ---------------------------------------------------------------------------

add_action( 'admin_init', 'aitepc_register_settings' );
/**
 * Register the post-type selection option and its settings fields.
 */
function aitepc_register_settings() {
	register_setting(
		'aitepc_expiry_group',
		'aitepc_expiry_date_post_types',
		array(
			'sanitize_callback' => 'aitepc_sanitize_post_types',
			'default'           => array( 'post' ),
		)
	);

	add_settings_section(
		'aitepc_post_types_section',
		__( 'Select Post Types for Expiry Date Metabox', 'ait-easy-post-customization' ),
		null,
		'aitepc-expiry-date-settings'
	);

	$all_post_types      = get_post_types( array( 'public' => true ), 'objects' );
	$filtered_post_types = array_filter(
		$all_post_types,
		static function ( $post_type ) {
			return ! in_array( $post_type->name, array( 'page', 'attachment' ), true );
		}
	);

	foreach ( $filtered_post_types as $post_type ) {
		add_settings_field(
			'aitepc_pt_' . $post_type->name,
			$post_type->label,
			'aitepc_pt_checkbox_cb',
			'aitepc-expiry-date-settings',
			'aitepc_post_types_section',
			array( 'pt' => $post_type->name )
		);
	}
}

/**
 * Sanitize the post types option — array of strings.
 *
 * @param  mixed $input Raw option value.
 * @return array        Sanitized array of post-type slugs.
 */
function aitepc_sanitize_post_types( $input ) {
	return is_array( $input ) ? array_map( 'sanitize_text_field', $input ) : array();
}

/**
 * Render a single post-type checkbox for the Settings API.
 *
 * @param array $args Field arguments containing 'pt' (post type slug).
 */
function aitepc_pt_checkbox_cb( $args ) {
	$options = get_option( 'aitepc_expiry_date_post_types', array() );
	$checked = in_array( $args['pt'], $options, true ) ? 'checked' : '';
	printf(
		'<input type="checkbox" name="aitepc_expiry_date_post_types[]" value="%s" %s class="form-check-input" />',
		esc_attr( $args['pt'] ),
		$checked
	);
}

// ---------------------------------------------------------------------------
// File includes — order matters (actions file before cron uses it)
// ---------------------------------------------------------------------------

require_once plugin_dir_path( __FILE__ ) . 'functions.php';
require_once plugin_dir_path( __FILE__ ) . 'plugin-files/aitepc-expiry-actions.php';
require_once plugin_dir_path( __FILE__ ) . 'plugin-files/aitepc-email-notifications.php';
require_once plugin_dir_path( __FILE__ ) . 'plugin-files/aitepc-rest-api.php';
require_once plugin_dir_path( __FILE__ ) . 'plugin-files/aitepc-settings.php';
require_once plugin_dir_path( __FILE__ ) . 'plugin-files/aitepc-expiry-metabox.php';
require_once plugin_dir_path( __FILE__ ) . 'plugin-files/aitepc-custom-fields.php';