<?php
/**
 * Abstract base class for custom post types.
 *
 * @package WP_FediStream
 */

namespace WP_FediStream\PostTypes;

// Prevent direct file access.
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

/**
 * Abstract post type class.
 *
 * Provides common functionality for all custom post types.
 */
abstract class AbstractPostType {

    /**
     * Post type key.
     *
     * @var string
     */
    protected string $post_type;

    /**
     * Constructor.
     */
    public function __construct() {
        add_action( 'init', array( $this, 'register' ) );
        add_action( 'add_meta_boxes', array( $this, 'add_meta_boxes' ) );
        add_action( 'save_post_' . $this->post_type, array( $this, 'save_meta' ), 10, 2 );
    }

    /**
     * Register the post type.
     *
     * @return void
     */
    abstract public function register(): void;

    /**
     * Add meta boxes.
     *
     * @return void
     */
    abstract public function add_meta_boxes(): void;

    /**
     * Save post meta.
     *
     * @param int      $post_id Post ID.
     * @param \WP_Post $post    Post object.
     * @return void
     */
    abstract public function save_meta( int $post_id, \WP_Post $post ): void;

    /**
     * Get the post type key.
     *
     * @return string
     */
    public function get_post_type(): string {
        return $this->post_type;
    }

    /**
     * Verify nonce and user capabilities before saving.
     *
     * @param int    $post_id Post ID.
     * @param string $nonce_action Nonce action name.
     * @param string $nonce_name Nonce field name.
     * @return bool Whether save should proceed.
     */
    protected function can_save( int $post_id, string $nonce_action, string $nonce_name ): bool {
        // Verify nonce.
        if ( ! isset( $_POST[ $nonce_name ] ) || ! wp_verify_nonce( sanitize_key( $_POST[ $nonce_name ] ), $nonce_action ) ) {
            return false;
        }

        // Check autosave.
        if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
            return false;
        }

        // Check permissions.
        if ( ! current_user_can( 'edit_post', $post_id ) ) {
            return false;
        }

        return true;
    }

    /**
     * Sanitize and save a text meta field.
     *
     * @param int    $post_id Post ID.
     * @param string $meta_key Meta key.
     * @param string $post_key POST array key.
     * @return void
     */
    protected function save_text_meta( int $post_id, string $meta_key, string $post_key ): void {
        if ( isset( $_POST[ $post_key ] ) ) {
            update_post_meta( $post_id, $meta_key, sanitize_text_field( wp_unslash( $_POST[ $post_key ] ) ) );
        }
    }

    /**
     * Sanitize and save a textarea meta field.
     *
     * @param int    $post_id Post ID.
     * @param string $meta_key Meta key.
     * @param string $post_key POST array key.
     * @return void
     */
    protected function save_textarea_meta( int $post_id, string $meta_key, string $post_key ): void {
        if ( isset( $_POST[ $post_key ] ) ) {
            update_post_meta( $post_id, $meta_key, sanitize_textarea_field( wp_unslash( $_POST[ $post_key ] ) ) );
        }
    }

    /**
     * Sanitize and save an integer meta field.
     *
     * @param int    $post_id Post ID.
     * @param string $meta_key Meta key.
     * @param string $post_key POST array key.
     * @return void
     */
    protected function save_int_meta( int $post_id, string $meta_key, string $post_key ): void {
        if ( isset( $_POST[ $post_key ] ) ) {
            update_post_meta( $post_id, $meta_key, absint( $_POST[ $post_key ] ) );
        }
    }

    /**
     * Sanitize and save a URL meta field.
     *
     * @param int    $post_id Post ID.
     * @param string $meta_key Meta key.
     * @param string $post_key POST array key.
     * @return void
     */
    protected function save_url_meta( int $post_id, string $meta_key, string $post_key ): void {
        if ( isset( $_POST[ $post_key ] ) ) {
            update_post_meta( $post_id, $meta_key, esc_url_raw( wp_unslash( $_POST[ $post_key ] ) ) );
        }
    }

    /**
     * Sanitize and save a boolean meta field.
     *
     * @param int    $post_id Post ID.
     * @param string $meta_key Meta key.
     * @param string $post_key POST array key.
     * @return void
     */
    protected function save_bool_meta( int $post_id, string $meta_key, string $post_key ): void {
        $value = isset( $_POST[ $post_key ] ) ? 1 : 0;
        update_post_meta( $post_id, $meta_key, $value );
    }

    /**
     * Sanitize and save an array meta field.
     *
     * @param int    $post_id Post ID.
     * @param string $meta_key Meta key.
     * @param string $post_key POST array key.
     * @return void
     */
    protected function save_array_meta( int $post_id, string $meta_key, string $post_key ): void {
        if ( isset( $_POST[ $post_key ] ) && is_array( $_POST[ $post_key ] ) ) {
            $values = array_map( 'sanitize_text_field', wp_unslash( $_POST[ $post_key ] ) );
            update_post_meta( $post_id, $meta_key, $values );
        } else {
            delete_post_meta( $post_id, $meta_key );
        }
    }

    /**
     * Sanitize and save a date meta field.
     *
     * @param int    $post_id Post ID.
     * @param string $meta_key Meta key.
     * @param string $post_key POST array key.
     * @return void
     */
    protected function save_date_meta( int $post_id, string $meta_key, string $post_key ): void {
        if ( isset( $_POST[ $post_key ] ) && ! empty( $_POST[ $post_key ] ) ) {
            $date = sanitize_text_field( wp_unslash( $_POST[ $post_key ] ) );
            // Validate date format (YYYY-MM-DD).
            if ( preg_match( '/^\d{4}-\d{2}-\d{2}$/', $date ) ) {
                update_post_meta( $post_id, $meta_key, $date );
            }
        } else {
            delete_post_meta( $post_id, $meta_key );
        }
    }
}