<?php
/**
 * Plugin Name: Door Status Indicator
 * Plugin URI:  https://gitea.alluna.pt/jfig/wp-api-consumer
 * Description: Lightweight, dependency‑free plugin that polls <https://nodered.jfig.net/api/v1/door-open>, caches the status for a few seconds, and shows a real‑time door open/closed indicator (🟢/🔴) via [door_status] shortcode and the Admin Bar.
 * Version:     1.1.0
 * Author:      Joao Figueiredo (ChatGPT helper)
 * Author URI:  https://jfig.net
 * License:     GPL v2 or later
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain: door-status-indicator
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit; // Exit if accessed directly.
}

/*
|--------------------------------------------------------------------------
| Configuration
|--------------------------------------------------------------------------
| Place environment‑specific constants inside door-status-config.php.
| They will be loaded automatically. If the file is missing we fall back to
| bundled defaults so the plugin keeps working out‑of‑the‑box.
*/

$config_file = plugin_dir_path( __FILE__ ) . 'door-status-config.php';
if ( file_exists( $config_file ) ) {
    require_once $config_file;
} else {
    // Fallback defaults – safe to adjust directly here if you prefer.
    define( 'DSI_API_URL',   'https://nodered.jfig.net/api/v1/door-open' );
    define( 'DSI_CACHE_KEY', 'dsi_door_open_status' );
    define( 'DSI_CACHE_TTL', 10 );
}

/*
|--------------------------------------------------------------------------
| Core – fetch & cache
|--------------------------------------------------------------------------
*/

/**
 * Retrieves the door‑open status (boolean) with transient caching.
 *
 * @return bool True if open, false if closed.
 */
function dsi_get_status() : bool {
    $cached = get_transient( DSI_CACHE_KEY );
    if ( false !== $cached ) {
        return (bool) $cached;
    }

    $response = wp_remote_get( DSI_API_URL, [
        'timeout'    => 3,
        'user-agent' => 'DoorStatusIndicator/1.1 (+https://wordpress.org/)',
    ] );

    if ( is_wp_error( $response ) ) {
        // On error, assume closed and set a short transient to avoid hammering.
        set_transient( DSI_CACHE_KEY, false, DSI_CACHE_TTL );
        return false;
    }

    $body    = wp_remote_retrieve_body( $response );
    $decoded = json_decode( $body, true );
    $status  = false;

    if ( is_bool( $decoded ) ) {
        $status = $decoded;
    } elseif ( is_array( $decoded ) && isset( $decoded['open'] ) ) {
        $status = (bool) $decoded['open'];
    }

    set_transient( DSI_CACHE_KEY, $status, DSI_CACHE_TTL );
    return $status;
}

/*
|--------------------------------------------------------------------------
| Shortcode [door_status]
|--------------------------------------------------------------------------
*/

/**
 * Outputs a 🟢 or 🔴 indicator reflecting current door status.
 * Usage: [door_status]
 *
 * @return string HTML span with coloured emoji.
 */
function dsi_shortcode() : string {
    $open  = dsi_get_status();
    $emoji = $open ? '🟢' : '🔴';

    return sprintf(
        '<span class="door-status-indicator" aria-label="Door is %s">%s</span>',
        $open ? 'open' : 'closed',
        $emoji
    );
}
add_shortcode( 'door_status', 'dsi_shortcode' );

/*
|--------------------------------------------------------------------------
| Admin Bar indicator
|--------------------------------------------------------------------------
*/

/**
 * Adds a live indicator to the WordPress Admin Bar (front‑ and back‑end).
 *
 * @param WP_Admin_Bar $wp_admin_bar The admin bar instance.
 */
function dsi_admin_bar( WP_Admin_Bar $wp_admin_bar ) : void {
    if ( ! current_user_can( 'read' ) ) {
        return; // Only show to logged‑in users who can read.
    }

    $open  = dsi_get_status();
    $emoji = $open ? '🟢' : '🔴';
    $text  = $open ? __( 'Door Open', 'door-status-indicator' ) : __( 'Door Closed', 'door-status-indicator' );

    $wp_admin_bar->add_node( [
        'id'    => 'door-status-indicator',
        'title' => sprintf( '%s %s', $emoji, $text ),
        'href'  => '#',
        'meta'  => [
            'title' => $text,
        ],
    ] );
}
add_action( 'admin_bar_menu', 'dsi_admin_bar', 1000 );

/*
|--------------------------------------------------------------------------
| Front‑end inline CSS
|--------------------------------------------------------------------------
*/

function dsi_enqueue_assets() : void {
    if ( is_admin() ) {
        return;
    }
    $css = '.door-status-indicator{font-size:1.2em;line-height:1}';
    wp_add_inline_style( 'wp-block-library', $css );
}
add_action( 'wp_enqueue_scripts', 'dsi_enqueue_assets' );

/*
|--------------------------------------------------------------------------
| WP‑CLI command (optional)
|--------------------------------------------------------------------------
*/

if ( defined( 'WP_CLI' ) && WP_CLI ) {
    WP_CLI::add_command( 'door-status', function() {
        $status = dsi_get_status() ? 'open 🟢' : 'closed 🔴';
        WP_CLI::success( "Door is $status" );
    } );
}

// End of file