using System.Linq;
using Content.Client.CharacterInfo;
using Content.Client.Gameplay;
using Content.Client.UserInterface.Controls;
using Content.Client.UserInterface.Systems.Character.Controls;
using Content.Client.UserInterface.Systems.Character.Windows;
using Content.Client.UserInterface.Systems.Objectives.Controls;
using Content.Shared.Input;
using JetBrains.Annotations;
using Robust.Client.GameObjects;
using Robust.Client.UserInterface;
using Robust.Client.UserInterface.Controllers;
using Robust.Client.UserInterface.Controls;
using Robust.Shared.Input.Binding;
using Robust.Shared.Utility;
using static Content.Client.CharacterInfo.CharacterInfoSystem;
using static Robust.Client.UserInterface.Controls.BaseButton;

namespace Content.Client.UserInterface.Systems.Character;

[UsedImplicitly]
public sealed class CharacterUIController : UIController, IOnStateEntered<GameplayState>, IOnStateExited<GameplayState>, IOnSystemChanged<CharacterInfoSystem>
{
    [UISystemDependency] private readonly CharacterInfoSystem _characterInfo = default!;
    [UISystemDependency] private readonly SpriteSystem _sprite = default!;

    private CharacterWindow? _window;
    private MenuButton? CharacterButton => UIManager.GetActiveUIWidgetOrNull<MenuBar.Widgets.GameTopMenuBar>()?.CharacterButton;

    public void OnStateEntered(GameplayState state)
    {
        DebugTools.Assert(_window == null);

        _window = UIManager.CreateWindow<CharacterWindow>();
        LayoutContainer.SetAnchorPreset(_window, LayoutContainer.LayoutPreset.CenterTop);



        CommandBinds.Builder
            .Bind(ContentKeyFunctions.OpenCharacterMenu,
                 InputCmdHandler.FromDelegate(_ => ToggleWindow()))
             .Register<CharacterUIController>();
    }

    public void OnStateExited(GameplayState state)
    {
        if (_window != null)
        {
            _window.Dispose();
            _window = null;
        }

        CommandBinds.Unregister<CharacterUIController>();
    }

    public void OnSystemLoaded(CharacterInfoSystem system)
    {
        system.OnCharacterUpdate += CharacterUpdated;
        system.OnCharacterDetached += CharacterDetached;
    }

    public void OnSystemUnloaded(CharacterInfoSystem system)
    {
        system.OnCharacterUpdate -= CharacterUpdated;
        system.OnCharacterDetached -= CharacterDetached;
    }

    public void UnloadButton()
    {
        if (CharacterButton == null)
        {
            return;
        }

        CharacterButton.OnPressed -= CharacterButtonPressed;
    }

    public void LoadButton()
    {
        if (CharacterButton == null)
        {
            return;
        }

        CharacterButton.OnPressed += CharacterButtonPressed;

        if (_window == null)
        {
            return;
        }

        _window.OnClose += DeactivateButton;
        _window.OnOpen += ActivateButton;
    }

    private void DeactivateButton() => CharacterButton!.Pressed = false;
    private void ActivateButton() => CharacterButton!.Pressed = true;

    private void CharacterUpdated(CharacterData data)
    {
        if (_window == null)
        {
            return;
        }

        var (entity, job, objectives, briefing, entityName) = data;

        _window.SpriteView.SetEntity(entity);
        _window.NameLabel.Text = entityName;
        _window.SubText.Text = job;
        _window.Objectives.RemoveAllChildren();
        _window.ObjectivesLabel.Visible = objectives.Any();

        foreach (var (groupId, conditions) in objectives)
        {
            var objectiveControl = new CharacterObjectiveControl
            {
                Orientation = BoxContainer.LayoutOrientation.Vertical,
                Modulate = Color.Gray
            };

            objectiveControl.AddChild(new Label
            {
                Text = groupId,
                Modulate = Color.LightSkyBlue
            });

            foreach (var condition in conditions)
            {
                var conditionControl = new ObjectiveConditionsControl();
                conditionControl.ProgressTexture.Texture = _sprite.Frame0(condition.Icon);
                conditionControl.ProgressTexture.Progress = condition.Progress;
                var titleMessage = new FormattedMessage();
                var descriptionMessage = new FormattedMessage();
                titleMessage.AddText(condition.Title);
                descriptionMessage.AddText(condition.Description);

                conditionControl.Title.SetMessage(titleMessage);
                conditionControl.Description.SetMessage(descriptionMessage);

                objectiveControl.AddChild(conditionControl);
            }

            _window.Objectives.AddChild(objectiveControl);
        }

        if (briefing != null)
        {
            var briefingControl = new ObjectiveBriefingControl();
            briefingControl.Label.Text = briefing;
            _window.Objectives.AddChild(briefingControl);
        }

        var controls = _characterInfo.GetCharacterInfoControls(entity);
        foreach (var control in controls)
        {
            _window.Objectives.AddChild(control);
        }

        _window.RolePlaceholder.Visible = briefing == null && !controls.Any() && !objectives.Any();
    }

    private void CharacterDetached()
    {
        CloseWindow();
    }

    private void CharacterButtonPressed(ButtonEventArgs args)
    {
        ToggleWindow();
    }

    private void CloseWindow()
    {
        _window?.Close();
    }

    private void ToggleWindow()
    {
        if (_window == null)
            return;

        if (CharacterButton != null)
        {
            CharacterButton.Pressed = !_window.IsOpen;
        }

        if (_window.IsOpen)
        {
            CloseWindow();
        }
        else
        {
            _characterInfo.RequestCharacterInfo();
            _window.Open();
        }
    }
}