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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media;
using Tango.Core.Commands;
using Tango.SharedUI;
using Tango.Touch.Controls;

namespace Tango.PPC.Common.Notifications
{
    /// <summary>
    /// Represents the PPC user notification provider responsible for displaying information, alerts and dialogs to the user.
    /// </summary>
    public interface INotificationProvider
    {
        /// <summary>
        /// Gets the collection of notification items.
        /// </summary>
        ObservableCollection<NotificationItem> NotificationItems { get; }

        /// <summary>
        /// Gets the notification items view.
        /// </summary>
        ICollectionView NotificationItemsView { get; }

        /// <summary>
        /// Gets the collection of taskbar items.
        /// </summary>
        ObservableCollection<TaskBarItem> TaskBarItems { get; }

        /// <summary>
        /// Gets the application bar items.
        /// </summary>
        ObservableCollection<AppBarItem> AppBarItems { get; }

        /// <summary>
        /// Gets a value indicating whether this instance has any application bar items.
        /// </summary>
        bool HasAppBarItems { get; }

        /// <summary>
        /// Gets a value indicating whether this instance has notification items.
        /// </summary>
        bool HasNotificationItems { get; }

        /// <summary>
        /// Gets the current message box.
        /// </summary>
        MessageBoxVM CurrentMessageBox { get; }

        /// <summary>
        /// Gets a value indicating whether this instance has message box.
        /// </summary>
        bool HasMessageBox { get; }

        /// <summary>
        /// Gets the current dialog.
        /// </summary>
        FrameworkElement CurrentDialog { get; }

        /// <summary>
        /// Gets the current app button.
        /// </summary>
        AppButton CurrentAppButton { get; }

        /// <summary>
        /// Gets a value indicating whether this instance has a dialog.
        /// </summary>
        bool HasDialog { get; }

        /// <summary>
        /// Shows an information message box.
        /// </summary>
        /// <param name="message">The message.</param>
        Task ShowInfo(String message);

        /// <summary>
        /// Shows warning message box.
        /// </summary>
        /// <param name="message">The message.</param>
        Task ShowWarning(String message);

        /// <summary>
        /// Shows an error message box.
        /// </summary>
        /// <param name="message">The message.</param>
        Task ShowError(String message);

        /// <summary>
        /// Shows a success message box.
        /// </summary>
        /// <param name="message">The message.</param>
        Task ShowSuccess(String message);

        /// <summary>
        /// Shows a question message box.
        /// </summary>
        /// <param name="message">The message.</param>
        Task<bool> ShowQuestion(String message);

        /// <summary>
        /// Inserts the notification item to the bottom of the notifications collection.
        /// </summary>
        /// <param name="item">The item.</param>
        NotificationItem PushNotification(NotificationItem item);

        /// <summary>
        /// Pushes the notification.
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        NotificationItem PushNotification<T>() where T : NotificationItem;

        /// <summary>
        /// Displays the specified dialog in a modal design.
        /// </summary>
        /// <typeparam name="VM"></typeparam>
        /// <param name="datacontext">The data context.</param>
        /// <param name="view">The view.</param>
        /// <returns></returns>
        Task<VM> ShowDialog<VM>(VM datacontext, FrameworkElement view) where VM : DialogViewVM;

        /// <summary>
        /// Displays the specified dialog in a modal design.
        /// The notification provider will try to locate the view automatically using conventions.
        /// </summary>
        /// <typeparam name="VM"></typeparam>
        /// <param name="datacontext">The data context.</param>
        /// <returns></returns>        
        Task<VM> ShowDialog<VM>(VM datacontext) where VM : DialogViewVM;

        /// <summary>
        /// Displays the specified dialog in a modal design.
        /// The data context instance will be automatically created.
        /// The notification provider will try to locate the view automatically using conventions.
        /// </summary>
        /// <typeparam name="VM"></typeparam>
        /// <returns></returns>
        Task<VM> ShowDialog<VM>() where VM : DialogViewVM;

        /// <summary>
        /// Removed the specified notification item.
        /// </summary>
        /// <param name="item">The item.</param>
        void PopNotification(NotificationItem item);

        /// <summary>
        /// Gets a value indicating whether this instance is in global busy state.
        /// </summary>
        bool IsInGlobalBusyState { get; }

        /// <summary>
        /// Sets the global busy message.
        /// </summary>
        /// <param name="message">The message.</param>
        void SetGlobalBusyMessage(String message);

        /// <summary>
        /// Releases the global busy message.
        /// </summary>
        void ReleaseGlobalBusyMessage();

        /// <summary>
        /// Gets the current global busy message.
        /// </summary>
        String GlobalBusyMessage { get; }

        /// <summary>
        /// Pushes the application bar item.
        /// </summary>
        /// <param name="appBarItem">The application bar item.</param>
        /// <returns></returns>
        AppBarItem PushAppBarItem(AppBarItem appBarItem);

        /// <summary>
        /// Pushes the application bar item.
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        T PushAppBarItem<T>() where T : AppBarItem;

        /// <summary>
        /// Pops the application bar item.
        /// </summary>
        /// <param name="appBarItem">The application bar item.</param>
        void PopAppBarItem(AppBarItem appBarItem);

        /// <summary>
        /// Pushes the task bar item.
        /// </summary>
        /// <param name="taskBarItem">The task bar item.</param>
        /// <returns></returns>
        TaskBarItem PushTaskBarItem(TaskBarItem taskBarItem);

        /// <summary>
        /// Handles the Push Task Bar Item event.
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        TaskBarItem PushTaskBarItem<T>() where T : TaskBarItem;

        /// <summary>
        /// Pops the task bar item.
        /// </summary>
        /// <param name="TaskBarItem">The task bar item.</param>
        void PopTaskBarItem(TaskBarItem taskBarItem);

        /// <summary>
        /// Gets or sets a value indicating whether to allow notifications visibility.
        /// </summary>
        bool NotificationsVisible { get; set; }

        /// <summary>
        /// Pushes the app button.
        /// </summary>
        /// <param name="appButton">The app button.</param>
        void PushAppButton(AppButton appButton);

        /// <summary>
        /// Pops the app button.
        /// </summary>
        /// <param name="appButton">The app button.</param>
        void PopAppButton(AppButton appButton);
    }
}