using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

namespace comal.timesheets
{

    public class TitleBarItemsCollection : ObservableCollection<TitleBarItem> { }
    public class TitleBarIconsCollection : ObservableCollection<TitleBarIcon> { }

    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class TitleBar
    {
        
        public static readonly BindableProperty HeaderProperty = BindableProperty.CreateAttached(nameof(Header), typeof(string), typeof(TitleBar), "");
        
        public String Header
        {
            get => (String)GetValue(HeaderProperty);
            set => SetValue(HeaderProperty, value);
        } 
        
        public static readonly BindableProperty IconsProperty = BindableProperty.CreateAttached(nameof(Icons), typeof(TitleBarIconsCollection), typeof(TitleBar), null);
        
        public TitleBarIconsCollection Icons 
        { 
            get => (TitleBarIconsCollection)GetValue(IconsProperty);
            set => SetValue(IconsProperty,value); 
        }
        
        public static readonly BindableProperty ItemsProperty = BindableProperty.CreateAttached(nameof(Items), typeof(TitleBarItemsCollection), typeof(TitleBar), null);

        public TitleBarItemsCollection Items 
        { 
            get => (TitleBarItemsCollection)GetValue(ItemsProperty);
            set => SetValue(ItemsProperty,value); 
        }
        
        public static readonly BindableProperty HasBackButtonProperty = BindableProperty.CreateAttached(nameof(HasBackButton), typeof(bool), typeof(TitleBar), true);
        
        public bool HasBackButton
        {
            get => (bool)GetValue(HasBackButtonProperty);
            set => SetValue(HasBackButtonProperty, value);
        } 
        
        public TitleBar()
        {
            Items = new TitleBarItemsCollection();
            Icons = new TitleBarIconsCollection();
            InitializeComponent();
        }
        
        private void TitleBarItem_Tapped(object sender, EventArgs e)
        {
            if (sender is Image image)
                if (image.BindingContext is TitleBarItem item)
                    item.DoTap();
        }

        private void Back_Clicked(object sender, EventArgs e)
        {
            Navigation.PopAsync();
        }
    }
}