// UI-Erweiterung der Post-Übersicht für Bulk-Aktionen
add_filter('bulk_actions-edit-post', 'kupf_tta_bulk_actions');
add_filter('bulk_actions-edit-zeitungsartikel', 'kupf_tta_bulk_actions');

function kupf_tta_bulk_actions($actions) {
    $actions['generate_tts'] = 'Audioversion erstellen';
    return $actions;
}

add_filter('handle_bulk_actions-edit-post', 'kupf_tta_handle_bulk_action', 10, 3);
add_filter('handle_bulk_actions-edit-zeitungsartikel', 'kupf_tta_handle_bulk_action', 10, 3);

function kupf_tta_handle_bulk_action($redirect_to, $doaction, $post_ids) {
    if ($doaction !== 'generate_tts') {
        return $redirect_to;
    }

    foreach ($post_ids as $post_id) {
        as_enqueue_async_action('kupf_tta_generate_audio_post', [$post_id, 'de-DE']);
    }

    return $redirect_to;
}

// Registrierung der Action Scheduler Hook
add_action('kupf_tta_generate_audio_post', 'kupf_tta_generate_audio_post', 10, 2);

// Audio-Datei-Erstellung
function kupf_tta_generate_audio_post($post_id, $language) {
    $post = get_post($post_id);
    $title = strip_tags($post->post_title);
    $content = wp_strip_all_tags($post->post_content);

    $text_to_speak = $title . ". " . $content;

    $audio_content = kupf_tta_google_tts_request($text_to_speak, $language);

    if (!$audio_content) {
        return;
    }

    $year = get_the_date('Y', $post_id);
    $upload_dir = wp_upload_dir();
    $dir_path = $upload_dir['basedir'] . "/$year/";

    if (!file_exists($dir_path)) {
        wp_mkdir_p($dir_path);
    }

    $file_path = $dir_path . $$year = get_the_date('Y', $post_id);
$upload_dir = wp_upload_dir();
$dir_path = $upload_dir['basedir'] . "/$year/";

if (!file_exists($dir_path)) {
    wp_mkdir_p($dir_path);
}

$file_path = $dir_path . $post_id . '-' . $language . '.mp3';

$audio_content = kupf_tta_google_tts_request($text, $language);

if ($audio_content) {
    file_put_contents($file_path, $audio_content);
} else {
    error_log("Failed to generate audio content for post ID: $post_id");
}

// Google Cloud TTS API Integration
function kupf_tta_google_tts_request($text, $language) {
    $api_key = 'YOUR_GOOGLE_CLOUD_API_KEY'; // Replace with a secure method to retrieve the API key
    $url = "https://texttospeech.googleapis.com/v1/text:synthesize?key=$api_key";

    $payload = [
        'input' => [
            'text' => $text
        ],
        'voice' => [
            'languageCode' => $language,
            'name' => 'de-DE-studio-C'
        ],
        'audioConfig' => [
            'audioEncoding' => 'MP3'
        ]
    ];

    $args = [
        'body' => json_encode($payload),
        'headers' => [
            'Content-Type' => 'application/json'
        ]
    ];

    $response = wp_remote_post($url, $args);

    if (is_wp_error($response)) {
        error_log('TTS API Request Error: ' . $response->get_error_message());
        return null;
    }

    $body = json_decode(wp_remote_retrieve_body($response), true);

    if (empty($body['audioContent'])) {
        error_log('No audio content returned from TTS API.');
        return null;
    }

    return base64_decode($body['audioContent']);
}$year = get_the_date('Y', $post_id);
$upload_dir = wp_upload_dir();
$dir_path = $upload_dir['basedir'] . "/$year/";

if (!file_exists($dir_path)) {
    wp_mkdir_p($dir_path);
}

$file_path = $dir_path . $post_id . '-' . $language . '.mp3';

$audio_content = kupf_tta_google_tts_request($text, $language);

if ($audio_content) {
    file_put_contents($file_path, $audio_content);
} else {
    error_log("Failed to generate audio content for post ID: $post_id");
}

// Google Cloud TTS API Integration
function kupf_tta_google_tts_request($text, $language) {
    $api_key = 'YOUR_GOOGLE_CLOUD_API_KEY'; // Replace with a secure method to retrieve the API key
    $url = "https://texttospeech.googleapis.com/v1/text:synthesize?key=$api_key";

    $payload = [
        'input' => [
            'text' => $text
        ],
        'voice' => [
            'languageCode' => $language,
            'name' => 'de-DE-studio-C'
        ],
        'audioConfig' => [
            'audioEncoding' => 'MP3'
        ]
    ];

    $args = [
        'body' => json_encode($payload),
        'headers' => [
            'Content-Type' => 'application/json'
        ]
    ];

    $response = wp_remote_post($url, $args);

    if (is_wp_error($response)) {
        error_log('TTS API Request Error: ' . $response->get_error_message());
        return null;
    }

    $body = json_decode(wp_remote_retrieve_body($response), true);

    if (empty($body['audioContent'])) {
        error_log('No audio content returned from TTS API.');
        return null;
    }

    return base64_decode($body['audioContent']);
}$year = get_the_date('Y', $post_id);
$upload_dir = wp_upload_dir();
$dir_path = $upload_dir['basedir'] . "/$year/";

if (!file_exists($dir_path)) {
    wp_mkdir_p($dir_path);
}

$file_path = $dir_path . $post_id . '-' . $language . '.mp3';

$audio_content = kupf_tta_google_tts_request($text, $language);

if ($audio_content) {
    file_put_contents($file_path, $audio_content);
} else {
    error_log("Failed to generate audio content for post ID: $post_id");
}

// Google Cloud TTS API Integration
function kupf_tta_google_tts_request($text, $language) {
    $api_key = 'YOUR_GOOGLE_CLOUD_API_KEY'; // Replace with a secure method to retrieve the API key
    $url = "https://texttospeech.googleapis.com/v1/text:synthesize?key=$api_key";

    $payload = [
        'input' => [
            'text' => $text
        ],
        'voice' => [
            'languageCode' => $language,
            'name' => 'de-DE-studio-C'
        ],
        'audioConfig' => [
            'audioEncoding' => 'MP3'
        ]
    ];

    $args = [
        'body' => json_encode($payload),
        'headers' => [
            'Content-Type' => 'application/json'
        ]
    ];

    $response = wp_remote_post($url, $args);

    if (is_wp_error($response)) {
        error_log('TTS API Request Error: ' . $response->get_error_message());
        return null;
    }

    $body = json_decode(wp_remote_retrieve_body($response), true);

    if (empty($body['audioContent'])) {
        error_log('No audio content returned from TTS API.');
        return null;
    }

    return base64_decode($body['audioContent']);
}post_id . '-' . $language . '.mp3';

    file_put_contents($file_path, $audio_content);
}

// Google Cloud TTS API Integration
function kupf_tta_google_tts_request($text, $language) {
    $api_key = 'YOUR_GOOGLE_CLOUD_API_KEY'; // API-Key sicher speichern und abrufen!
    $url = "https://texttospeech.googleapis.com/v1/text:synthesize?key=$api_key";

    $payload = [
        'input' => [
            'text' => $text
        ],
        'voice' => [
            'languageCode' => $language,
            'name' => 'de-DE-studio-C'
        ],
        'audioConfig' => [
            'audioEncoding' => 'MP3'
        ]
    ];

    $args = [
        'body' => json_encode($payload),
        'headers' => [
            'Content-Type' => 'application/json'
        ]
    ];

    $response = wp_remote_post($url, $args);

    if (is_wp_error($response)) {
        error_log('TTS API Request Error: ' . $response->get_error_message());
        return null;
    }
    if (empty($body['audioContent'])) {
        error_log('No audio content returned from TTS API.');
        return null;
    }

    $body = json_decode(wp_remote_retrieve_body($response), true);

    if (!isset($body['audioContent'])) {
        error_log('TTS API Response Error: ' . wp_remote_retrieve_body($response));
        return null;
    }

    return base64_decode($body['audioContent']);
}