using System;
using Android.App;
using Android.Views;
using Google.Android.Material.BottomNavigation;
using Microsoft.Maui;
using Microsoft.Maui.Platform;

namespace Xamarin.Forms.Clinical6.Views
{
    public partial class DashboardTabPage
    {
        partial void RegisterPlatformBadgeHandler()
        {
            DashboardBadgeEvent -= Android_UpdateBadge;
            DashboardBadgeEvent += Android_UpdateBadge;
        }

        private void Android_UpdateBadge(object sender, int count)
        {
            try
            {
                var activity = Microsoft.Maui.ApplicationModel.Platform.CurrentActivity;
                if (activity == null) return;

                activity.RunOnUiThread(() =>
                {
                    try
                    {
                        var decor = activity.Window?.DecorView;
                        if (decor == null) return;

                        var root = decor as ViewGroup;
                        var bottomNav = FindBottomNavigationView(root);

                        if (bottomNav == null)
                        {
                            int bottomNavId = activity.Resources.GetIdentifier("maui_bottom_navigation_view", "id", activity.PackageName);
                            if (bottomNavId == 0)
                                bottomNavId = activity.Resources.GetIdentifier("bottom_navigation_view", "id", activity.PackageName);

                            if (bottomNavId != 0)
                                bottomNav = activity.FindViewById<BottomNavigationView>(bottomNavId);
                        }

                        if (bottomNav == null) return;
                        if (_alertTabIndex < 0 || _alertTabIndex >= bottomNav.Menu.Size()) return;

                        var menuItem = bottomNav.Menu.GetItem(_alertTabIndex);
                        if (menuItem == null) return;

                        var itemId = menuItem.ItemId;

                        if (count <= 0)
                        {
                            bottomNav.RemoveBadge(itemId);
                            return;
                        }

                        // Cap at 99 for display
                        int displayCount = Math.Min(count, 99);

                        // Create/update badge
                        var badge = bottomNav.GetOrCreateBadge(itemId);
                        badge.Number = displayCount;

                        // ---- POSITIONING LOGIC ----
                        try
                        {
                            var density = activity.Resources.DisplayMetrics.Density;
                            badge.HorizontalOffset = (int)(25 * density); // adjust right/left
                            badge.VerticalOffset = (int)(10 * density);   // adjust up/down
                        }
                        catch { }
                        // --------------------------------

                        // ---- COLOR ----
                        badge.BackgroundColor = global::Android.Graphics.Color.ParseColor("#B00020");

                        // ---- TEXT COLOR ----
                        try
                        {
                            var setTextColorMethod = badge.GetType().GetMethod("SetBadgeTextColor");
                            if (setTextColorMethod != null)
                            {
                                setTextColorMethod.Invoke(badge, new object[] { global::Android.Graphics.Color.White });
                            }
                            else
                            {
                                var prop = badge.GetType().GetProperty("BadgeTextColor");
                                if (prop != null && prop.CanWrite)
                                    prop.SetValue(badge, global::Android.Graphics.Color.White);
                            }
                        }
                        catch { }
                    }
                    catch (Exception exInner)
                    {
                        System.Diagnostics.Debug.WriteLine($"Android_UpdateBadge UI exception: {exInner}");
                    }
                });
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine($"Android_UpdateBadge exception: {ex}");
            }
        }

        private BottomNavigationView FindBottomNavigationView(ViewGroup root)
        {
            if (root == null) return null;

            for (int i = 0; i < root.ChildCount; i++)
            {
                var child = root.GetChildAt(i);
                if (child is BottomNavigationView bnv) return bnv;

                if (child is ViewGroup vg)
                {
                    var found = FindBottomNavigationView(vg);
                    if (found != null) return found;
                }
            }
            return null;
        }
    }
}