using UnityEngine;
using System;

public class HoldNoteController : MonoBehaviour
{
    private bool isInsideJudgeZone = false;
    public event Action<bool> OnJudgeZoneChanged;
    private bool isMoving = false;
    private float speed = 0f;         // 运动速度
    private float activationTime;     // 何时开始移动（Time.time 基准）

    private void Update()
    {
        // 到达激活时间后开始移动
        if (!isMoving && Time.time >= activationTime)
        {
            isMoving = true;
        }

        if (isMoving)
        {
            transform.Translate(Vector3.down * speed * Time.deltaTime);
        }
    }

    /// <summary>
    /// 设置该段的“到达判定线的目标时间”(hitTime) 与分段延迟(delay)，并由此推导移动开始时间。
    /// 注意：这里必须使用与 HoldNote.hitTime 一致的时间基准（NoteSpawner 传入的谱面实时点），
    /// 否则用 Time.time + delay 会在首段/暂停/开歌延迟时产生系统性错位，导致永远 Miss。
    /// </summary>
    public void ConfigureTiming(float baseHitTime, float segmentDelay, float travelTime)
    {
        // baseHitTime = startTime + noteData.time (+ globalHitDelay)
        float hitTime = baseHitTime + segmentDelay;
        activationTime = hitTime - travelTime;
        isMoving = false;
    }

    /// <summary>
    /// 兼容旧接口：不推荐。旧版用 Time.time 会导致时间基准不一致。
    /// </summary>
    public void SetSegmentDelay(float segmentDelay)
    {
        // Fallback to old behavior if caller didn't use ConfigureTiming.
        activationTime = Time.time + segmentDelay;
        isMoving = false;
    }

    public void SetSpeed(float newSpeed)
    {
        speed = newSpeed;
    }

    public void StopMovement()
    {
        isMoving = false;
    }

    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (!collision.CompareTag("JudgmentLine")) return;

        isInsideJudgeZone = true;
        OnJudgeZoneChanged?.Invoke(true);
    }

    private void OnTriggerExit2D(Collider2D collision)
    {
        if (!collision.CompareTag("JudgmentLine")) return;

        isInsideJudgeZone = false;
        OnJudgeZoneChanged?.Invoke(false);
    }

    public bool IsInsideJudgArea()
    {
        return isInsideJudgeZone;
    }

    public float ActivationTime => activationTime;
    public float CurrentSpeed => speed;
}