/*
 * notification-service.vala
 *
 * Main notification service for RSSuper on Linux.
 * Implements Gio.Notification API following freedesktop.org spec.
 */

using Gio;
using GLib;

namespace RSSuper {

/**
 * NotificationService - Main notification service for Linux
 * 
 * Handles desktop notifications using Gio.Notification.
 * Follows freedesktop.org notify-send specification.
 */
public class NotificationService : Object {
    
    // Singleton instance
    private static NotificationService? _instance;
    
    // Gio.Notification instance
    private Gio.Notification? _notification;
    
    // Tray icon reference
    private Gtk.App? _app;
    
    // Default title
    private string _default_title = "RSSuper";
    
    // Default urgency
    private Urgency _default_urgency = Urgency.NORMAL;
    
    /**
     * Get singleton instance
     */
    public static NotificationService? get_instance() {
        if (_instance == null) {
            _instance = new NotificationService();
        }
        return _instance;
    }
    
    /**
     * Get the instance (for singleton pattern)
     */
    private NotificationService() {
        _app = Gtk.App.get_active();
        _default_title = _app != null ? _app.get_name() : "RSSuper";
        _default_urgency = Urgency.NORMAL;
    }
    
    /**
     * Check if notification service is available
     */
    public bool is_available() {
        return Gio.Notification.is_available();
    }
    
    /**
     * Create a new notification
     *
     * @param title The notification title
     * @param body The notification body
     * @param urgency Urgency level (NORMAL, CRITICAL, LOW)
     * @param timestamp Optional timestamp (defaults to now)
     */
    public Notification create(string title, string body, 
                               Urgency urgency = Urgency.NORMAL,
                               DateTime timestamp = null) {
        
        _notification = Gio.Notification.new(_default_title);
        _notification.set_body(body);
        _notification.set_urgency(urgency);
        
        if (timestamp == null) {
            _notification.set_time_now();
        } else {
            _notification.set_time(timestamp);
        }
        
        return _notification;
    }
    
    /**
     * Create a notification with summary and icon
     */
    public Notification create(string title, string body, string icon,
                               Urgency urgency = Urgency.NORMAL,
                               DateTime timestamp = null) {
        
        _notification = Gio.Notification.new(title);
        _notification.set_body(body);
        _notification.set_urgency(urgency);
        
        if (timestamp == null) {
            _notification.set_time_now();
        } else {
            _notification.set_time(timestamp);
        }
        
        // Set icon
        try {
            _notification.set_icon(icon);
        } catch (Error e) {
            warning("Failed to set icon: %s", e.message);
        }
        
        return _notification;
    }
    
    /**
     * Create a notification with summary, body, and icon
     */
    public Notification create(string summary, string body, string icon,
                               Urgency urgency = Urgency.NORMAL,
                               DateTime timestamp = null) {
        
        _notification = Gio.Notification.new(summary);
        _notification.set_body(body);
        _notification.set_urgency(urgency);
        
        if (timestamp == null) {
            _notification.set_time_now();
        } else {
            _notification.set_time(timestamp);
        }
        
        // Set icon
        try {
            _notification.set_icon(icon);
        } catch (Error e) {
            warning("Failed to set icon: %s", e.message);
        }
        
        return _notification;
    }
    
    /**
     * Show the notification
     */
    public void show() {
        if (_notification == null) {
            warning("Cannot show null notification");
            return;
        }
        
        try {
            _notification.show();
        } catch (Error e) {
            warning("Failed to show notification: %s", e.message);
        }
    }
    
    /**
     * Show the notification with timeout
     *
     * @param timeout_seconds Timeout in seconds (default: 5)
     */
    public void show_with_timeout(int timeout_seconds = 5) {
        if (_notification == null) {
            warning("Cannot show null notification");
            return;
        }
        
        try {
            _notification.show_with_timeout(timeout_seconds * 1000);
        } catch (Error e) {
            warning("Failed to show notification with timeout: %s", e.message);
        }
    }
    
    /**
     * Get the notification instance
     */
    public Gio.Notification? get_notification() {
        return _notification;
    }
    
    /**
     * Set the default title
     */
    public void set_default_title(string title) {
        _default_title = title;
    }
    
    /**
     * Set the default urgency
     */
    public void set_default_urgency(Urgency urgency) {
        _default_urgency = urgency;
    }
    
    /**
     * Get the default title
     */
    public string get_default_title() {
        return _default_title;
    }
    
    /**
     * Get the default urgency
     */
    public Urgency get_default_urgency() {
        return _default_urgency;
    }
    
    /**
     * Get the app reference
     */
    public Gtk.App? get_app() {
        return _app;
    }
    
    /**
     * Check if the notification can be shown
     */
    public bool can_show() {
        return _notification != null && _notification.can_show();
    }
    
    /**
     * Get available urgency levels
     */
    public static List<Urgency> get_available_urgencies() {
        return Urgency.get_available();
    }
}

}