using UnityEngine;
using TMPro;
using System.Collections;
using System.IO.Ports;

public class CompressionDetector : MonoBehaviour
{
    public Transform leftHand;
    public Transform rightHand;
    public Transform CompressionTarget; // Referentiepunt op de borst

    public float requiredDepth = 0.06f; // 6 cm compressie
    public float minTimeBetween = 0.3f; // Minstens 0.3s tussen compressies
    public int requiredCompressions = 30;
    public Collider compressionZone;

    [Header("UI")]
    public TextMeshProUGUI compressionCounterText;
    public GameObject compressionUI; // Canvas of panel met teller

    [Header("UI - Extra Feedback")]
    public GameObject extraUI;                         // 👈 Nieuw
    public TextMeshProUGUI extraUIText;

    private MainPhase mainPhase;

    private float lastCompressionTime = 0f;
    private int compressionCount = 0;
    private bool sessionActive = false;

    private bool wereHandsBelowLastFrame = false; // Edge detectie

    void Awake()
    {
        mainPhase = GetComponentInParent<MainPhase>();
    }

    void OnEnable()
    {
        extraUIText.text = "This person needs CPR! Start by overlapping your hands and pressing down in the center of the chest about 6 cm deep, following the rhythm of the haptic feedback. Watch the counter.";


        if (compressionUI != null)
            compressionUI.SetActive(true);

        if (extraUI != null)
            extraUI.SetActive(true);

        StartCompressionSession();

    }

    void OnDisable()
    {
        if (compressionUI != null)
            compressionUI.SetActive(false);

        if (extraUI != null)
            extraUI.SetActive(false);

        sessionActive = false;
    }

    void Update()
    {
        if (!sessionActive)
            return;

        float leftDepth = CompressionTarget.position.y - leftHand.position.y;
        float rightDepth = CompressionTarget.position.y - rightHand.position.y;

        bool eitherHandBelow = leftDepth >= requiredDepth || rightDepth >= requiredDepth;

        if (eitherHandBelow && !wereHandsBelowLastFrame &&
            Time.time - lastCompressionTime > minTimeBetween &&
            HandsInsideZone())
        {
            lastCompressionTime = Time.time;
            compressionCount++;
            UpdateUI();

            Debug.Log($"Compressie {compressionCount}/{requiredCompressions}");

            if (compressionCount >= requiredCompressions)
            {
                EndCompressionSession();
            }
        }

        wereHandsBelowLastFrame = eitherHandBelow;
    }

    public void StartCompressionSession()
    {
        Debug.Log("Fase gestart: start compressies (30x 6cm)");
        sessionActive = true;
        compressionCount = 0;
        lastCompressionTime = 0f;
        wereHandsBelowLastFrame = false;
        ArduinoManager.Instance.StartConstantPulseToMotor(1, 588); //motor 1 op 104 bpm
        ArduinoManager.Instance.StartConstantPulseToMotor(2, 588);
        UpdateUI();
    }

    void EndCompressionSession()
    {
        sessionActive = false;
        Debug.Log("30 compressies voltooid. Fase klaar.");

        ArduinoManager.Instance.StopMotor(1); //stop motors
        ArduinoManager.Instance.StopMotor(2);

        if (compressionUI != null)
            compressionUI.SetActive(false);

        if (mainPhase != null)
        {
            mainPhase.CompletePhase();
        }
        else
        {
            Debug.LogWarning("MainPhase niet gevonden in hiërarchie.");
        }
    }

    void UpdateUI()
    {
        if (compressionCounterText != null)
        {
            compressionCounterText.text = $"Compressions: {compressionCount} / {requiredCompressions}";
        }
    }

    bool HandsInsideZone()
    {
        return compressionZone.bounds.Contains(leftHand.position) ||
               compressionZone.bounds.Contains(rightHand.position);
    }
}