using System;
using TINK.View.Info.BikeInfo;
#if USEMASTERDETAIL || USEFLYOUT
using TINK.View.MasterDetail;
#endif
using TINK.ViewModel.MasterDetail;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

namespace TINK.View
{
    /// <summary>
    /// Delegate to perform navigation.
    /// </summary>
    public delegate void ShowPageDelegate(Type p_oType, string p_strTitle = null);

    [XamlCompilation(XamlCompilationOptions.Compile)]
#if USEMASTERDETAIL || USEFLYOUT
    public partial class MainPage : MasterDetailPage, INavigationMasterDetail
#else
    public partial class MainPage : MasterDetailPage
#endif
    {
        public MainPage()
        {
            InitializeComponent();
            MasterPage.ShowPageViewService = ShowPage;

            // Any type of split behaviour conflics with map shifting functionality.
            MasterBehavior = MasterBehavior.Popover; 

            var navigationPage = Detail as NavigationPage;
            if (navigationPage == null)
            {
                return;
            }

#if USEMASTERDETAIL || USEFLYOUT
            var detailPage = navigationPage.RootPage as IDetailPage;
            if (detailPage == null)
            {
                return;
            }

            detailPage.NavigationMasterDetail = this;
#endif
        }

        /// <summary> Creates and a page an shows it.</summary>
        /// <param name="p_oTypeOfPage">Type of page to show.</param>
        public void ShowPage(
            Type p_oTypeOfPage, 
            string p_strTitle = null)
        {
            if (p_oTypeOfPage == null)
                return;

            var page = (Page)Activator.CreateInstance(p_oTypeOfPage);
            page.Title = p_strTitle ?? Helper.GetCaption(p_oTypeOfPage);

#if USEMASTERDETAIL || USEFLYOUT
            var l_oPage = page as IDetailPage;
            if (l_oPage != null)
            {
                l_oPage.NavigationMasterDetail = this;
            }
#endif

#if !BACKSTYLE
            // When bike info page is shown do not allow to close this carousel before all pages were displayed.
            IsGestureEnabled = p_oTypeOfPage != typeof(BikeInfoCarouselPage);

            Detail = new NavigationPage(page);
            IsPresented = false;
#else
            Detail.Navigation.PushAsync(page);
            IsPresented = false;

            while (Detail.Navigation.NavigationStack.Count > 2)
            {
                // Ensure that stack does never contains more than 2 pages (root page + one child)
                // This can occure if from child via swipe onther child is opened.
                // Remove item after adding new one to avoid flickering.
                Detail.Navigation.RemovePage(Detail.Navigation.NavigationStack[1]);
            }
#endif

            MasterPage.ListView.SelectedItem = null;
        }
    }
}