<?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:     0.6.2
 * 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',   '0.6.2' ); }
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/history.php';          // Track history + favourites (v0.5.0)
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',
        __( 'Track history', 'radio' ),
        __( 'History', 'radio' ),
        'read',
        'radio-history',
        'radio_render_history_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
        'radio_page_radio-history',   // History + Favourites (v0.5.0)
    );
    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' ),
        'popoutUrl' => admin_url( 'admin-post.php?action=radio_popout' ),
        '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' ),
            'addFav'       => __( 'Add to favourites', 'radio' ),
            'removeFav'    => __( 'Remove from favourites', 'radio' ),
            'clearConfirm' => __( 'Clear all track history? (Favourites are kept.)', '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() );
}

/**
 * AJAX: log a played track to the user's history (v0.5.0).
 * Nonce: same `radio_save_state` token used for state saves — both come
 * from the same `wp_localize_script` config available on player pages.
 */
add_action( 'wp_ajax_radio_log_track', 'radio_ajax_log_track' );
function radio_ajax_log_track() {
    if ( ! is_user_logged_in() ) { wp_send_json_error( 'Not logged in.', 401 ); }
    check_ajax_referer( 'radio_save_state', 'nonce' );
    $logged = radio_log_track( array(
        'artist'     => $_POST['artist']     ?? '',
        'title'      => $_POST['title']      ?? '',
        'station'    => $_POST['station']    ?? '',
        'station_id' => $_POST['station_id'] ?? '',
    ) );
    wp_send_json_success( array( 'logged' => (bool) $logged ) );
}

/**
 * AJAX: toggle whether a track is favourited.
 * Nonce: `radio_history` — created fresh per History-page render so the
 * AJAX is gated to users who actually loaded the page.
 */
add_action( 'wp_ajax_radio_toggle_favourite', 'radio_ajax_toggle_favourite' );
function radio_ajax_toggle_favourite() {
    if ( ! is_user_logged_in() ) { wp_send_json_error( 'Not logged in.', 401 ); }
    check_ajax_referer( 'radio_history', 'nonce' );
    $new_state = radio_toggle_favourite( array(
        'artist'     => $_POST['artist']     ?? '',
        'title'      => $_POST['title']      ?? '',
        'station'    => $_POST['station']    ?? '',
        'station_id' => $_POST['station_id'] ?? '',
    ) );
    wp_send_json_success( array( 'favourite' => (bool) $new_state ) );
}

/** AJAX: clear the current user's history (favourites preserved). */
add_action( 'wp_ajax_radio_clear_history', 'radio_ajax_clear_history' );
function radio_ajax_clear_history() {
    if ( ! is_user_logged_in() ) { wp_send_json_error( 'Not logged in.', 401 ); }
    check_ajax_referer( 'radio_history', 'nonce' );
    radio_clear_history_all();
    wp_send_json_success();
}

/**
 * v0.6.0 — Pop-out mini player. Renders a standalone HTML page (no WP
 * admin chrome) at `admin-post.php?action=radio_popout`, opened by the
 * JS via `window.open()`. The popup persists across main-tab navigation
 * so background music keeps playing when the user moves around the
 * admin. `&play=1` in the URL tells `radio.js` to auto-resume on load.
 */
add_action( 'admin_post_radio_popout', 'radio_render_popout_page' );
function radio_render_popout_page() {
    if ( ! current_user_can( 'read' ) ) {
        wp_die( esc_html__( 'You do not have permission to view this page.', 'radio' ) );
    }

    $state    = radio_get_state();
    $station  = radio_find_station( $state['station_id'] );
    $stations = radio_get_stations_grouped();
    $theme    = isset( $state['theme'] ) ? $state['theme'] : 'auto';
    if ( ! in_array( $theme, array( 'auto', 'light', 'dark' ), true ) ) { $theme = 'auto'; }

    $cfg = array(
        'state'     => $state,
        'stations'  => radio_get_stations_flat(),
        'ajaxUrl'   => admin_url( 'admin-ajax.php' ),
        'nonce'     => wp_create_nonce( 'radio_save_state' ),
        'popoutUrl' => '', // already in popout — no further popouts
        'autoPlay'  => isset( $_GET['play'] ), // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- query flag only, no state change
        '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' ),
        ),
    );
    ?>
<!DOCTYPE html>
<html lang="<?php echo esc_attr( str_replace( '_', '-', get_bloginfo( 'language' ) ) ); ?>">
<head>
    <meta charset="<?php bloginfo( 'charset' ); ?>">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title><?php printf( esc_html__( 'Radio — %s', 'radio' ), esc_html( $station['name'] ) ); ?></title>
    <link rel="stylesheet" href="<?php echo esc_url( includes_url( 'css/dashicons.min.css' ) ); ?>?ver=<?php echo esc_attr( get_bloginfo( 'version' ) ); ?>">
    <link rel="stylesheet" href="<?php echo esc_url( RADIO_URL . 'assets/css/radio.css' ); ?>?ver=<?php echo esc_attr( RADIO_VERSION ); ?>">
    <style>
        :root { --wp-admin-theme-color: #2271b1; }
        html, body { margin: 0; padding: 0; }
        body { padding: 14px; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background: #f0f0f1; color: #1d2327; font-size: 13px; }
        .radio-popout-header { display: flex; justify-content: space-between; align-items: center; margin: 0 0 12px; }
        .radio-popout-header h1 { margin: 0; font-size: 14px; font-weight: 600; color: #1d2327; }
        .radio-popout-header h1::before { content: '📻 '; }
        .radio-popout-close { background: none; border: 0; font-size: 18px; cursor: pointer; color: #646970; padding: 4px 8px; line-height: 1; border-radius: 3px; }
        .radio-popout-close:hover { color: #b32d2e; background: rgba(179,45,46,0.08); }
        .radio-popout-wrap { background: #fff; border: 1px solid #c3c4c7; padding: 14px; border-radius: 3px; }
        .radio-popout-wrap .radio-player__station-select select { max-width: 100%; }
        .radio-popout-wrap .radio-player__volume { width: 100%; }
        .radio-popout-wrap .radio-player__controls { flex-direction: column; align-items: stretch; gap: 10px; }
        body.radio-theme-dark { background: #101213; color: #f0f0f1; }
        body.radio-theme-dark .radio-popout-header h1 { color: #f0f0f1; }
        body.radio-theme-dark .radio-popout-wrap { background: #1d2327; border-color: #3c434a; }
        body.radio-theme-dark .radio-popout-close { color: #a7aaad; }
    </style>
</head>
<body class="radio-popout radio-theme-<?php echo esc_attr( $theme ); ?>">

    <div class="radio-popout-header">
        <h1><?php esc_html_e( 'Radio', 'radio' ); ?></h1>
        <button type="button" class="radio-popout-close" onclick="window.close()" title="<?php esc_attr_e( 'Close', 'radio' ); ?>">✕</button>
    </div>

    <div class="radio-popout-wrap">
        <div class="radio-player" data-radio-surface="popout">

            <div class="radio-player__now">
                <span class="radio-player__indicator" aria-hidden="true">
                    <span class="radio-player__bars"><span></span><span></span><span></span><span></span></span>
                    <canvas class="radio-player__viz" data-radio-viz hidden></canvas>
                </span>
                <span class="radio-player__label"><?php esc_html_e( 'Now Playing', 'radio' ); ?></span>
                <span class="radio-player__station-name" data-radio-name><?php echo esc_html( $station['name'] ); ?></span>
                <span class="radio-player__station-genre" data-radio-genre><?php echo esc_html( $station['genre'] ); ?></span>
                <p class="radio-player__station-desc" data-radio-desc><?php echo esc_html( $station['description'] ); ?></p>
                <p class="radio-player__track" data-radio-track hidden></p>
            </div>

            <div class="radio-player__controls">
                <button type="button" class="button button-primary radio-player__play" data-radio-play>
                    <span class="radio-player__play-glyph" data-radio-play-glyph aria-hidden="true">&#9654;</span>
                    <span data-radio-play-label><?php esc_html_e( 'Play', 'radio' ); ?></span>
                </button>
                <div class="radio-player__volume">
                    <button type="button" class="radio-player__mute" data-radio-mute aria-label="<?php esc_attr_e( 'Mute', 'radio' ); ?>">
                        <span class="dashicons dashicons-controls-volumeon" aria-hidden="true"></span>
                    </button>
                    <input type="range" min="0" max="100" value="<?php echo esc_attr( (int) round( $state['volume'] * 100 ) ); ?>" data-radio-volume aria-label="<?php esc_attr_e( 'Volume', 'radio' ); ?>">
                    <span class="radio-player__volume-pct" data-radio-volume-pct><?php echo esc_html( (int) round( $state['volume'] * 100 ) ); ?>%</span>
                </div>
            </div>

            <div class="radio-player__station-select">
                <label for="radio-station-popout"><?php esc_html_e( 'Station', 'radio' ); ?></label>
                <select id="radio-station-popout" data-radio-station>
                    <?php foreach ( $stations as $genre => $entries ) :
                        if ( empty( $entries ) ) { continue; }
                        ?>
                        <optgroup label="<?php echo esc_attr( $genre ); ?>">
                            <?php foreach ( $entries as $entry ) : ?>
                                <option value="<?php echo esc_attr( $entry['id'] ); ?>" data-url="<?php echo esc_attr( $entry['url'] ); ?>" data-desc="<?php echo esc_attr( $entry['description'] ); ?>" data-genre="<?php echo esc_attr( $entry['genre'] ); ?>" <?php selected( $entry['id'], $state['station_id'] ); ?>>
                                    <?php echo esc_html( $entry['name'] ); ?>
                                </option>
                            <?php endforeach; ?>
                        </optgroup>
                    <?php endforeach; ?>
                </select>
            </div>

            <div class="radio-player__error" data-radio-error hidden></div>
            <audio data-radio-audio preload="none" crossorigin="anonymous"></audio>
        </div>
    </div>

    <script>window.RadioPlugin = <?php echo wp_json_encode( $cfg ); ?>;</script>
    <script src="<?php echo esc_url( RADIO_URL . 'assets/js/radio.js' ); ?>?ver=<?php echo esc_attr( RADIO_VERSION ); ?>"></script>
</body>
</html>
    <?php
    exit;
}

/**
 * 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 );
    }
}