using BriarQueen.Data.Identifiers;
using BriarQueen.Framework.Coordinators.Events;
using BriarQueen.Framework.Events.Save;
using BriarQueen.Framework.Events.UI;
using BriarQueen.Framework.Managers.Input;
using BriarQueen.Framework.Managers.IO;
using BriarQueen.Framework.Services.Settings;
using System.Text.RegularExpressions;
using UnityEngine.InputSystem;
using VContainer;

namespace BriarQueen.Framework.Services.Tutorials
{
    public class TutorialService
    {
        private readonly EventCoordinator _eventCoordinator;
        private readonly SettingsService  _settingsService;
        private readonly SaveManager      _saveManager;
        private readonly InputManager     _inputManager;

        [Inject]
        public TutorialService(
            EventCoordinator eventCoordinator,
            SettingsService  settingsService,
            SaveManager      saveManager,
            InputManager     inputManager)
        {
            _eventCoordinator = eventCoordinator;
            _settingsService  = settingsService;
            _saveManager      = saveManager;
            _inputManager     = inputManager;
        }

        public void DisplayTutorial(TutorialPopupID tutorialPopupID)
        {
            var save         = _saveManager.CurrentSave;
            var tutorialVars = save?.PersistentVariables?.TutorialPopupVariables;

            if (tutorialVars == null)
                return;

            if (tutorialVars.HasBeenDisplayed(tutorialPopupID))
                return;

            tutorialVars.MarkDisplayed(tutorialPopupID);

            if (_settingsService.AreTutorialsEnabled())
            {
                var resolvedText = ResolveText(tutorialPopupID);
                _eventCoordinator.Publish(new DisplayTutorialPopupEvent(tutorialPopupID, resolvedText));
            }

            _eventCoordinator.PublishImmediate(new RequestGameSaveEvent());
        }

        // ── Text resolution ───────────────────────────────────────────

        /// <summary>
        /// Resolves {ActionName} tokens in the tutorial text for the given ID
        /// to the current binding display string for that action.
        /// Hotswap-safe — reads the current control scheme at call time.
        /// </summary>
        public string ResolveText(TutorialPopupID id)
        {
            if (!TutorialPopupTexts.TryGet(id, out var template))
                return string.Empty;

            return ResolveText(template);
        }

        /// <summary>
        /// Resolves {ActionName} tokens in an arbitrary string to the current
        /// binding display string for that action.
        /// </summary>
        public string ResolveText(string template)
        {
            if (string.IsNullOrWhiteSpace(template))
                return template;

            return Regex.Replace(template, @"\{(\w+)\}", match =>
            {
                var actionName = match.Groups[1].Value;
                var binding    = GetBindingDisplayString(actionName);
                return string.IsNullOrWhiteSpace(binding) ? match.Value : binding;
            });
        }

        /// <summary>
        /// Returns the display string for a named action's current binding,
        /// matched to the active control scheme.
        /// </summary>
        public string GetBindingDisplayString(string actionName)
        {
            if (_inputManager == null) return string.Empty;

            var action = _inputManager.GetAction(actionName);
            if (action == null) return string.Empty;

            var displayString = action.GetBindingDisplayString(group: _inputManager.CurrentControlScheme);

            return string.IsNullOrWhiteSpace(displayString) ? string.Empty : displayString;
        }
    }
}