using System;
using UnityEngine;
using UnityEngine.UIElements;

namespace DanroJump.UI.Gameplay
{
    /// <summary>
    /// Полноэкранное предложение продолжить забег за баланс.
    /// </summary>
    public sealed class ContinueGameOverlayWindow : IDisposable
    {
        private const float OpenInputGuardSeconds = 0.45f;

        private readonly VisualElement root;
        private readonly Label titleLabel;
        private readonly Label detailsLabel;
        private readonly Button continueButton;
        private readonly Button menuButton;
        private float inputEnabledAtTime = float.NegativeInfinity;

        public ContinueGameOverlayWindow(VisualElement root)
        {
            this.root = root;
            if (this.root != null)
            {
                this.root.focusable = true;
            }

            titleLabel = root?.Q<Label>("ContinueGameTitle");
            detailsLabel = root?.Q<Label>("ContinueGameDetails");
            continueButton = root?.Q<Button>("ContinueGameButton");
            menuButton = root?.Q<Button>("ContinueMenuButton");

            if (continueButton != null)
            {
                continueButton.clicked += HandleContinueClicked;
            }

            if (menuButton != null)
            {
                menuButton.clicked += HandleMenuClicked;
            }
        }

        public event Action ContinueRequested;
        public event Action MenuRequested;

        public bool IsOpen { get; private set; }

        public void SetOffer(int cost, int lives)
        {
            SetLabel(titleLabel, "Продолжить игру?");
            SetLabel(detailsLabel, $"Стоимость: {Math.Max(0, cost)}. Дополнительные жизни: {Math.Max(1, lives)}.");
            if (continueButton != null)
            {
                continueButton.SetEnabled(true);
            }
        }

        public void SetUnavailable()
        {
            SetLabel(titleLabel, "Игра окончена");
            SetLabel(detailsLabel, "Недостаточно баланса или функция отключена в сервисных настройках.");
            if (continueButton != null)
            {
                continueButton.SetEnabled(false);
            }
        }

        public void Open()
        {
            if (root == null)
            {
                return;
            }

            root.style.display = DisplayStyle.Flex;
            root.SetEnabled(true);
            IsOpen = true;
            inputEnabledAtTime = Time.unscaledTime + OpenInputGuardSeconds;
            root.Focus();
        }

        public void Close()
        {
            if (root == null)
            {
                return;
            }

            root.style.display = DisplayStyle.None;
            root.SetEnabled(false);
            IsOpen = false;
        }

        public void Dispose()
        {
            if (continueButton != null)
            {
                continueButton.clicked -= HandleContinueClicked;
            }

            if (menuButton != null)
            {
                menuButton.clicked -= HandleMenuClicked;
            }
        }

        private static void SetLabel(Label label, string value)
        {
            if (label != null)
            {
                label.text = value;
            }
        }

        private void HandleContinueClicked()
        {
            if (IsInputGuardActive())
            {
                return;
            }

            ContinueRequested?.Invoke();
        }

        private void HandleMenuClicked()
        {
            if (IsInputGuardActive())
            {
                return;
            }

            MenuRequested?.Invoke();
        }

        private bool IsInputGuardActive()
        {
            return Time.unscaledTime < inputEnabledAtTime;
        }
    }
}