<?php
/**
 * Radio — a free SomaFM player for your WordPress dashboard
 *
 * Plugin Name: Radio
 * Plugin URI:  https://icanhelp.ie/radio
 * Description: A small, focused, free radio player for your WordPress admin. 44 SomaFM stations grouped by 10 genres — ambient, electronic, lounge, rock, metal, jazz, world, reggae, holiday, specials. Plays via HTML5 audio; volume + station choice persist per-user.
 * Version:     0.3.2
 * Requires at least: 5.0
 * Requires PHP: 7.4
 * Author:      David Keane
 * Author URI:  https://rangersmyth.xyz/
 * License:     GPL v2 or later
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain: radio
 *
 * @package Radio
 */

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

// Plugin coordinates.
if ( ! defined( 'RADIO_VERSION' ) )   { define( 'RADIO_VERSION',   '0.3.2' ); }
if ( ! defined( 'RADIO_FILE' ) )      { define( 'RADIO_FILE',      __FILE__ ); }
if ( ! defined( 'RADIO_PATH' ) )      { define( 'RADIO_PATH',      plugin_dir_path( __FILE__ ) ); }
if ( ! defined( 'RADIO_URL' ) )       { define( 'RADIO_URL',       plugin_dir_url( __FILE__ ) ); }
if ( ! defined( 'RADIO_BASENAME' ) )  { define( 'RADIO_BASENAME',  plugin_basename( __FILE__ ) ); }
if ( ! defined( 'RADIO_GITEA_URL' ) ) { define( 'RADIO_GITEA_URL', 'https://git.davidtkeane.com/ranger/a-radio' ); }

// Includes — each file owns one concern.
require_once RADIO_PATH . 'inc/stations.php';         // the 44-station array + genre helpers
require_once RADIO_PATH . 'inc/state.php';            // user_meta storage for station/volume choice
require_once RADIO_PATH . 'inc/dashboard-widget.php'; // the compact mini-player on WP Dashboard
require_once RADIO_PATH . 'inc/admin-page.php';       // dedicated Radio admin page (larger player)
require_once RADIO_PATH . 'inc/about.php';            // About page
require_once RADIO_PATH . 'inc/settings.php';         // Settings page
require_once RADIO_PATH . 'inc/updater.php';          // self-hosted update checker against Gitea

/**
 * Admin menu registration. Radio gets its own top-level menu — having
 * the player one click away matters more than tucking it into Tools or
 * Settings. Icon is dashicons-format-audio for direct visual match.
 */
add_action( 'admin_menu', 'radio_register_admin_menu' );
function radio_register_admin_menu() {
    add_menu_page(
        __( 'Radio', 'radio' ),
        __( 'Radio', 'radio' ),
        'read',                       // any logged-in user with read access has their own radio
        'radio',
        'radio_render_main_page',
        'dashicons-format-audio',
        72                            // sits below Comments, above plugin entries
    );

    // "My Radio" — main landing submenu. Same slug as parent so clicking
    // either entry lands on the same page. Empty callback so only the
    // parent renderer fires (lesson learned from Buddy / Logbook duplicate-
    // form gotcha).
    add_submenu_page(
        'radio',
        __( 'My Radio', 'radio' ),
        __( 'My Radio', 'radio' ),
        'read',
        'radio',
        ''
    );

    add_submenu_page(
        'radio',
        __( 'Settings', 'radio' ),
        __( 'Settings', 'radio' ),
        'manage_options',
        'radio-settings',
        'radio_render_settings_page'
    );

    add_submenu_page(
        'radio',
        __( 'About', 'radio' ),
        __( 'About', 'radio' ),
        'read',
        'radio-about',
        'radio_render_about_page'
    );
}

/**
 * Enqueue Radio's CSS + JS on its own admin pages and on the main
 * dashboard (where the mini-player widget lives).
 */
add_action( 'admin_enqueue_scripts', 'radio_enqueue_admin_assets' );
function radio_enqueue_admin_assets( $hook ) {
    $radio_hooks = array(
        'index.php',                 // WP Dashboard (the widget lives here)
        'toplevel_page_radio',       // Radio main page
        'radio_page_radio-settings', // Settings
        'radio_page_radio-about',    // About
    );
    if ( ! in_array( $hook, $radio_hooks, true ) ) { return; }

    wp_enqueue_style(
        'radio-admin',
        RADIO_URL . 'assets/css/radio.css',
        array(),
        RADIO_VERSION
    );

    wp_enqueue_script(
        'radio-admin',
        RADIO_URL . 'assets/js/radio.js',
        array(),
        RADIO_VERSION,
        true
    );

    // Pass per-user state + station list + AJAX URL to JS.
    wp_localize_script( 'radio-admin', 'RadioPlugin', array(
        'state'     => radio_get_state(),
        'stations'  => radio_get_stations_flat(),
        'ajaxUrl'   => admin_url( 'admin-ajax.php' ),
        'nonce'     => wp_create_nonce( 'radio_save_state' ),
        'strings'   => array(
            'play'       => __( 'Play', 'radio' ),
            'pause'      => __( 'Pause', 'radio' ),
            'loading'    => __( 'Loading…', 'radio' ),
            'error'      => __( 'Stream error — try another station.', 'radio' ),
            'saveError'  => __( 'Preferences not saved — check your connection.', 'radio' ),
            'mute'       => __( 'Mute', 'radio' ),
            'unmute'     => __( 'Unmute', 'radio' ),
            'nowPlaying' => __( 'Now Playing', 'radio' ),
            'volume'     => __( 'Volume', 'radio' ),
            'station'    => __( 'Station', 'radio' ),
        ),
    ) );
}

/**
 * AJAX endpoint for saving per-user state (station / volume changes).
 * Avoids a full page reload on every interaction.
 */
add_action( 'wp_ajax_radio_save_state', 'radio_ajax_save_state' );
function radio_ajax_save_state() {
    if ( ! is_user_logged_in() ) {
        wp_send_json_error( 'Not logged in.', 401 );
    }
    check_ajax_referer( 'radio_save_state', 'nonce' );

    $patch = array();
    if ( isset( $_POST['station_id'] ) ) {
        $patch['station_id'] = sanitize_key( wp_unslash( $_POST['station_id'] ) );
    }
    if ( isset( $_POST['volume'] ) ) {
        $patch['volume'] = max( 0.0, min( 1.0, (float) $_POST['volume'] ) );
    }

    if ( empty( $patch ) ) {
        wp_send_json_error( 'Nothing to save.', 400 );
    }

    radio_update_state( $patch );
    wp_send_json_success( radio_get_state() );
}

/**
 * Surface the user's theme choice (auto/light/dark) to CSS as a body
 * class. `radio-theme-dark` forces dark; `radio-theme-auto` lets the
 * CSS respect `prefers-color-scheme`; `radio-theme-light` is the
 * default no-op.
 */
add_filter( 'admin_body_class', 'radio_admin_body_class' );
function radio_admin_body_class( $classes ) {
    if ( ! is_user_logged_in() ) { return $classes; }
    $state = radio_get_state();
    $theme = isset( $state['theme'] ) ? $state['theme'] : 'auto';
    if ( ! in_array( $theme, array( 'auto', 'light', 'dark' ), true ) ) { $theme = 'auto'; }
    return $classes . ' radio-theme-' . $theme;
}

/**
 * Activation hook: ensure the version option is set so the updater can
 * track it.
 */
register_activation_hook( __FILE__, 'radio_on_activate' );
function radio_on_activate() {
    if ( false === get_option( 'radio_version' ) ) {
        add_option( 'radio_version', RADIO_VERSION );
    } else {
        update_option( 'radio_version', RADIO_VERSION );
    }
}