using UnityEngine;
using AppleHills.Core.Settings;
using Core;
using Core.Settings;

namespace Input
{
    /// <summary>
    /// Saveable data for PlayerTouchController state
    /// </summary>
    [System.Serializable]
    public class PlayerSaveData
    {
        public Vector3 worldPosition;
        public Quaternion worldRotation;
    }

    /// <summary>
    /// Handles player movement in response to tap and hold input events.
    /// Supports both direct and pathfinding movement modes.
    /// Extends BasePlayerMovementController with save/load functionality.
    /// Interaction capability (MoveToAndNotify) is provided by base class.
    /// </summary>
    public class PlayerTouchController : BasePlayerMovementController
    {

        // Save system configuration
        public override bool AutoRegisterForSave => true;
        // Scene-specific SaveId - each level has its own player state
        public override string SaveId => $"{gameObject.scene.name}/PlayerController";
        
        protected override void LoadSettings()
        {
            var configs = GameManager.GetSettingsObject<IPlayerMovementConfigs>();
            _movementSettings = configs.DefaultPlayerMovement;
        }

        internal override void OnManagedStart()
        {
            base.OnManagedStart();
            
            // Register with InputManager as default consumer
            if (InputManager.Instance != null)
            {
                InputManager.Instance.RegisterController("trafalgar", this, setAsDefaultConsumer: true);
                Logging.Debug($"[PlayerTouchController] Registered controller '{gameObject.name}' as default consumer");
            }
        }

        #region IInteractingCharacter Override
        
        /// <summary>
        /// PlayerTouchController-specific interaction movement.
        /// Handles main character movement + follower dispatch based on interactable.characterToInteract setting.
        /// </summary>
        public override async System.Threading.Tasks.Task<bool> MoveToInteractableAsync(Interactions.InteractableBase interactable)
        {
            var characterToInteract = interactable.characterToInteract;
            
            // If None, skip movement
            if (characterToInteract == Interactions.CharacterToInteract.None)
            {
                return true;
            }
            
            // Determine stop distance based on interaction type
            float stopDistance;
            if (characterToInteract == Interactions.CharacterToInteract.Trafalgar)
            {
                // Move ONLY main character directly to item (close distance)
                stopDistance = Core.GameManager.Instance.PlayerStopDistanceDirectInteraction;
            }
            else // Pulver or Both
            {
                // Move main character to radius (far distance)
                stopDistance = Core.GameManager.Instance.PlayerStopDistance;
            }
            
            // Calculate stop position for main character
            Vector3 stopPoint = interactable.transform.position;
            bool customTargetFound = false;
            
            // Check for custom CharacterMoveToTarget for main character
            var moveTargets = interactable.GetComponentsInChildren<Interactions.CharacterMoveToTarget>();
            foreach (var target in moveTargets)
            {
                if (target.characterType == Interactions.CharacterToInteract.Trafalgar || 
                    target.characterType == Interactions.CharacterToInteract.Both)
                {
                    stopPoint = target.GetTargetPosition();
                    customTargetFound = true;
                    break;
                }
            }
            
            // If no custom target, calculate based on distance
            if (!customTargetFound)
            {
                stopPoint = Utils.MovementUtilities.CalculateStopPosition(
                    interactable.transform.position,
                    transform.position,
                    stopDistance
                );
            }
            
            // Move main character
            bool mainCharacterArrived = await Utils.MovementUtilities.MoveToPositionAsync(this, stopPoint);
            
            if (!mainCharacterArrived)
            {
                return false; // Movement cancelled
            }
            
            // Handle follower dispatch based on interaction type
            if (characterToInteract == Interactions.CharacterToInteract.Pulver || 
                characterToInteract == Interactions.CharacterToInteract.Both)
            {
                // Find follower and dispatch to interactable
                var followerController = FindFirstObjectByType<FollowerController>();
                if (followerController != null)
                {
                    // Determine follower target position
                    Vector3 followerTarget = interactable.transform.position;
                    
                    // Check for custom target for Pulver
                    foreach (var target in moveTargets)
                    {
                        if (target.characterType == Interactions.CharacterToInteract.Pulver || 
                            target.characterType == Interactions.CharacterToInteract.Both)
                        {
                            followerTarget = target.GetTargetPosition();
                            break;
                        }
                    }
                    
                    // Wait for follower to arrive
                    var tcs = new System.Threading.Tasks.TaskCompletionSource<bool>();
                    
                    void OnFollowerArrived()
                    {
                        followerController.OnPickupArrived -= OnFollowerArrived;
                        followerController.ReturnToPlayer(transform);
                        tcs.TrySetResult(true);
                    }
                    
                    followerController.OnPickupArrived += OnFollowerArrived;
                    followerController.GoToPoint(followerTarget);
                    
                    await tcs.Task;
                }
            }
            
            return true; // Success
        }
        
        #endregion


        #region Save/Load Lifecycle Hooks

        internal override string OnSceneSaveRequested()
        {
            var saveData = new PlayerSaveData
            {
                worldPosition = transform.position,
                worldRotation = transform.rotation
            };
            return JsonUtility.ToJson(saveData);
        }

        internal override void OnSceneRestoreRequested(string serializedData)
        {
            if (string.IsNullOrEmpty(serializedData))
            {
                Logging.Debug("[PlayerTouchController] No saved state to restore");
                return;
            }

            try
            {
                var saveData = JsonUtility.FromJson<PlayerSaveData>(serializedData);
                if (saveData != null)
                {
                    transform.position = saveData.worldPosition;
                    transform.rotation = saveData.worldRotation;
                    Logging.Debug($"[PlayerTouchController] Restored position: {saveData.worldPosition}");
                }
            }
            catch (System.Exception ex)
            {
                Logging.Warning($"[PlayerTouchController] Failed to restore state: {ex.Message}");
            }
        }

        #endregion
    }
}