using System.Collections;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;
using UnityEngine.XR;

public class ElevatorSceneTransition : MonoBehaviour
{
    [Header("シーン設定")]
    [SerializeField] private string bossSceneName = "BossStage";
    [SerializeField] private string playerTag = "Player";

    [Header("UI設定")]
    [SerializeField] private GameObject loadingCanvas;
    [SerializeField] private Text progressText;
    [SerializeField] private Slider progressSlider;

    [Header("演出設定")]
    [SerializeField] private Transform elevatorCageTransform;
    [SerializeField] private float shakeMagnitude = 0.015f;
    [SerializeField] private float hapticAmplitude = 0.15f;
    [SerializeField] private Transform playerTransform;

    private bool isLoadingStarted;
    private Vector3 originalCagePosition;

    private void Start()
    {
        if (loadingCanvas != null) loadingCanvas.SetActive(false);

        if (elevatorCageTransform != null)
        {
            originalCagePosition = elevatorCageTransform.position;
        }
    }

    private void OnTriggerEnter(Collider other)
    {
        if (isLoadingStarted) return;

        if (other.CompareTag(playerTag))
        {
            isLoadingStarted = true;

            if (playerTransform == null)
            {
                playerTransform = other.transform;
            }

            StartCoroutine(LoadSceneAsyncRoutine());
        }
    }

    private IEnumerator LoadSceneAsyncRoutine()
    {
        if (loadingCanvas != null) loadingCanvas.SetActive(true);

        AsyncOperation asyncLoad = SceneManager.LoadSceneAsync(bossSceneName);
        asyncLoad.allowSceneActivation = false;

        float hapticTimer = 0f;

        while (asyncLoad.progress < 0.9f)
        {
            float currentProgress = Mathf.Clamp01(asyncLoad.progress / 0.9f);
            if (progressText != null) progressText.text = $"LOADING: {(currentProgress * 100f):F0}%";
            if (progressSlider != null) progressSlider.value = currentProgress;

            Vector3 previousCagePosition = elevatorCageTransform.position;

            if (elevatorCageTransform != null)
            {
                Vector3 randomOffset = Random.insideUnitSphere * shakeMagnitude;
                randomOffset.y = 0;
                elevatorCageTransform.position = originalCagePosition + randomOffset;
            }

            Vector3 cageDelta = elevatorCageTransform.position - previousCagePosition;

            if (playerTransform != null && cageDelta != Vector3.zero)
            {
                playerTransform.position += cageDelta;
            }

            hapticTimer += Time.deltaTime;
            if (hapticTimer >= 0.1f)
            {
                TriggerBothHandHaptics(hapticAmplitude, 0.08f);
                hapticTimer = 0f;
            }

            yield return null;
        }

        if (elevatorCageTransform != null)
        {
            Vector3 previousCagePosition = elevatorCageTransform.position;
            elevatorCageTransform.position = originalCagePosition;
            Vector3 cageDelta = elevatorCageTransform.position - previousCagePosition;
            if (playerTransform != null) playerTransform.position += cageDelta;
        }

        if (progressText != null) progressText.text = "ARRIVED";
        if (progressSlider != null) progressSlider.value = 1f;

        yield return new WaitForSeconds(1.0f);

        asyncLoad.allowSceneActivation = true;
    }

    private void TriggerBothHandHaptics(float amplitude, float duration)
    {
        InputDevice leftDevice = InputDevices.GetDeviceAtXRNode(XRNode.LeftHand);
        if (leftDevice.isValid) leftDevice.SendHapticImpulse(0, amplitude, duration);

        InputDevice rightDevice = InputDevices.GetDeviceAtXRNode(XRNode.RightHand);
        if (rightDevice.isValid) rightDevice.SendHapticImpulse(0, amplitude, duration);
    }
}