using System.Numerics;
using Robust.Client.AutoGenerated;
using Robust.Client.UserInterface.Controls;
using Robust.Client.UserInterface.XAML;
using Content.Shared._White.CartridgeLoader.Cartridges;
using Content.Shared.Roles;
using Robust.Shared.Prototypes;

namespace Content.Client._White.CartridgeLoader.Cartridges;

[GenerateTypedNameReferences]
public sealed partial class MessagesUiFragment : BoxContainer
{
    public event Action<string>? OnMessageSent;
    public event Action<int?>? OnButtonPressed;

    private string _searchText = string.Empty;

    public MessagesUiFragment()
    {
        RobustXamlLoader.Load(this);
        Input.OnTextEntered += _ =>
        {
            if (!string.IsNullOrEmpty(Input.Text))
                OnMessageSent?.Invoke(Input.Text);
            Input.Clear();
        };

        BackButton.OnPressed += _ => OnButtonPressed?.Invoke(null);
        SearchBar.OnTextChanged += OnSearchTextChanged;

        UpdateState(MessagesUiStateMode.UserList, [], [], null);
    }

    public void UpdateState(MessagesUiStateMode mode, List<(MessagesUserData, int?)>? users, List<(string, int?)>? messages, string? name)
    {
        MessageContainer.DisposeAllChildren();
        Input.Orphan();
        BackButton.Orphan();

        SearchBar.Visible = false;

        if (mode == MessagesUiStateMode.Chat && messages != null)
        {
            HeaderLabel.Text = name;

            foreach (var (senderName, message) in messages)
            {
                AddNote($"{senderName} {message}");
            }

            OverContainer.AddChild(Input);
            HeaderBox.AddChild(BackButton);
            BackButton.SetPositionInParent(0);
        }
        else if (mode == MessagesUiStateMode.Error)
        {
            HeaderLabel.Text = Loc.GetString("messages-pda-error-header");
            AddNote(Loc.GetString("messages-pda-error-message"));
        }
        else if (mode == MessagesUiStateMode.UserList && users != null)
        {
            SearchBar.Visible = true;
            HeaderLabel.Text = Loc.GetString("messages-pda-chat-choice");
            foreach (var (messagesUser, userUid) in users)
            {
                AddButton(userUid, messagesUser.Name + ", " +  messagesUser.Job, messagesUser.Department);
            }
        }
    }

    ///<summary>
    /// Adding a button for selecting a chat
    ///</summary>
    private void AddButton(int? userUid, string userName, string departmentId)
    {
        var styleClass = IoCManager.Resolve<IPrototypeManager>().Index<DepartmentPrototype>(departmentId).ButtonStyle;

        var button = new Button
        {
            Text = userName,
            HorizontalExpand = true,
            ClipText = true,
            StyleClasses = { styleClass },
            MinWidth = 60
        };
        button.OnPressed += _ => OnButtonPressed?.Invoke(userUid);
        MessageContainer.AddChild(button);
    }

    ///<summary>
    /// Adding a text label to the message container
    ///</summary>
    private void AddNote(string note)
    {
        MessageContainer.AddChild(new Label
        {
            Text = note,
            HorizontalExpand = true,
            ClipText = false
        });
    }

    private bool ButtonIsVisible(Button button)
    {
        return string.IsNullOrEmpty(_searchText) || button.Text == null || button.Text.Contains(_searchText, StringComparison.OrdinalIgnoreCase);
    }

    private void UpdateVisibleButtons()
    {
        foreach (var child in MessageContainer.Children)
        {
            if (child is Button button)
                button.Visible = ButtonIsVisible(button);
        }
    }

    private void OnSearchTextChanged(LineEdit.LineEditEventArgs args)
    {
        _searchText = args.Text;

        UpdateVisibleButtons();
        MessagesScroll.SetScrollValue(Vector2.Zero);
    }
}