using UnityEngine;

public class EndlessDescenderController : MonoBehaviour, ITouchInputConsumer
{
    private float targetFingerX;
    private bool isTouchActive;
    private float originY;

    void Awake()
    {
        originY = transform.position.y;
    }

    void Start()
    {
        // Register as default consumer for input
        InputManager.Instance?.SetDefaultConsumer(this);
        // Initialize target to current position
        targetFingerX = transform.position.x;
        isTouchActive = false;
    }

    // Implement new ITouchInputConsumer contract
    public void OnTap(Vector2 worldPosition)
    {
        // Treat tap as a quick move to the tapped X position
        targetFingerX = Mathf.Clamp(worldPosition.x, GameManager.Instance.EndlessDescenderClampXMin, GameManager.Instance.EndlessDescenderClampXMax);
        isTouchActive = true;
    }

    public void OnDragStart(Vector2 position)
    {
        //
    }

    public void OnDrag(Vector2 position)
    {
        //
    }

    public void OnDragEnd(Vector2 position)
    {
        //
    }

    public void OnHoldStart(Vector2 worldPosition)
    {
        // Start hold, update target X
        targetFingerX = Mathf.Clamp(worldPosition.x, GameManager.Instance.EndlessDescenderClampXMin, GameManager.Instance.EndlessDescenderClampXMax);
        isTouchActive = true;
    }

    public void OnHold(Vector2 worldPosition)
    {
        // Update target x as finger moves
        targetFingerX = Mathf.Clamp(worldPosition.x, GameManager.Instance.EndlessDescenderClampXMin, GameManager.Instance.EndlessDescenderClampXMax);
    }

    public void OnHoldEnd(Vector2 worldPosition)
    {
        // Stop hold
        isTouchActive = false;
    }

    void Update()
    {
        if (!isTouchActive) return;
        float currentX = transform.position.x;
        float lerpSpeed = GameManager.Instance.EndlessDescenderLerpSpeed;
        float maxOffset = GameManager.Instance.EndlessDescenderMaxOffset;
        float exponent = GameManager.Instance.EndlessDescenderSpeedExponent;
        float targetX = targetFingerX;
        float offset = targetX - currentX;
        offset = Mathf.Clamp(offset, -maxOffset, maxOffset);
        float absOffset = Mathf.Abs(offset);
        float t = Mathf.Pow(absOffset / maxOffset, exponent); // Non-linear drop-off
        float moveStep = Mathf.Sign(offset) * maxOffset * t * Time.deltaTime * lerpSpeed;
        // Prevent overshooting
        moveStep = Mathf.Clamp(moveStep, -absOffset, absOffset);
        float newX = currentX + moveStep;
        newX = Mathf.Clamp(newX, GameManager.Instance.EndlessDescenderClampXMin, GameManager.Instance.EndlessDescenderClampXMax);
        float newY = originY;
        // Add vertical offset from WobbleBehavior if present
        WobbleBehavior wobble = GetComponent<WobbleBehavior>();
        if (wobble != null)
        {
            newY += wobble.VerticalOffset;
        }
        transform.position = new Vector3(newX, newY, transform.position.z);
        // Debug.Log($"EndlessDescenderController: Moved from {oldPos} to {transform.position} (targetX={targetX}, lerpSpeed={lerpSpeed}, offset={offset}, exponent={exponent}, moveStep={moveStep})");
    }

    // Optionally, handle touch release if needed
    // You can add a method to reset isTouchActive if desired
}