using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using TMPro;

public class LightWave : MonoBehaviour
{
    public float growSpeed = 2f;
    public float maxMultiplier = 9f;
    public bool isFront = false;
    public Camera heroCamera;

    public TextMeshProUGUI waveText;

    [HideInInspector] public bool showBothTextsAtOnce = false;
    [HideInInspector] public LightWave wave2ref;

    [HideInInspector] public float _eventTime;
    [HideInInspector] public bool _textSet = false;

    private bool _running = false;
    private float _sizeMultiplier = 1f;
    private ParticleSystem _ps;
    private float _baseStartSize;

    private const double SpeedOfLight = 299792458.0;
    private const double HeroSpeed = 10.0;
    private const double DroneSpeed = 40.0;
    private const double DistFront = 9.99;
    private const double DistBack = 9.57;
    private const double DistObserver = 20.0;

    void Awake()
    {
        _ps = GetComponent<ParticleSystem>();
        var main = _ps.main;
        _baseStartSize = main.startSizeMultiplier;
        _ps.Stop();
        gameObject.SetActive(false);

        if (waveText != null)
            waveText.gameObject.SetActive(false);
    }

    public void StartWave()
    {
        gameObject.SetActive(true);
        _ps.Play();
        _running = true;
        _eventTime = Time.time;
        _sizeMultiplier = 1f;
        _textSet = false;
        showBothTextsAtOnce = false;
        wave2ref = null;

        bool isDrone = GameManager.Instance != null && GameManager.Instance.useDrone;
        if (isDrone)
        {
            var main = _ps.main;
            main.startSizeMultiplier = _baseStartSize;
            return;
        }

        bool isView2 = GameManager.Instance != null && GameManager.Instance.isView2;
        if (!isView2)
            ShowText(this);
    }

    public void ShowTextForBoth()
    {
        ShowText(this);
        if (wave2ref != null)
            ShowText(wave2ref);
    }

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

        bool isView2 = GameManager.Instance != null && GameManager.Instance.isView2;
        bool isDrone = GameManager.Instance != null && GameManager.Instance.useDrone;

        if (!isFront && !isView2 && !isDrone)
        {
            _sizeMultiplier += growSpeed * Time.deltaTime;
            _sizeMultiplier = Mathf.Min(_sizeMultiplier, maxMultiplier);
            var main = _ps.main;
            main.startSizeMultiplier = _baseStartSize * _sizeMultiplier;
        }
    }

    void ShowText(LightWave wave)
    {
        if (wave.waveText == null) return;

        bool isSimulation = GameManager.Instance != null && GameManager.Instance.isSimulation;
        bool isView2 = GameManager.Instance != null && GameManager.Instance.isView2;
        string label = wave.isFront ? "Хвилю 1" : "Хвилю 2";

        double jitter = isView2 && GameManager.Instance != null ? GameManager.Instance.view2Jitter : 0.0;
        if (isSimulation)
        {
            double simC = 5000.0;
            double simV = GameManager.Instance != null ? GameManager.Instance.simV : 2000.0;
            double dist = isView2 ? (DistObserver + jitter) : (wave.isFront ? DistFront : DistBack);
            double relSpeed = isView2 ? simC : (wave.isFront ? (simC + simV) : (simC - simV));
            double timeS = dist / relSpeed;
            wave.waveText.text = $"Зафіксували {label} через {timeS:F5} с";
        }
        else
        {
            double dist = isView2 ? (DistObserver + jitter) : (wave.isFront ? DistFront : DistBack);
            double relSpeed = isView2 ? SpeedOfLight : (wave.isFront ? (SpeedOfLight + HeroSpeed) : (SpeedOfLight - HeroSpeed));
            double timeNs = (dist / relSpeed) * 1e9;
            wave.waveText.text = $"Зафіксували {label} через {timeNs:F2} нс";
        }

        wave.waveText.gameObject.SetActive(true);
        wave._textSet = true;

        if (!wave.isFront)
        {
            RestartManager rm = FindObjectOfType<RestartManager>();
            if (rm != null)
                rm.ShowRestart();
        }
    }

    public void SetDroneText(bool front, bool isSimulation, float simDelay)
    {
        if (waveText == null) return;

        bool isView2 = GameManager.Instance != null && GameManager.Instance.isView2;
        string label = front ? "Хвилю 1" : "Хвилю 2";

        double droneJitter = isView2 && GameManager.Instance != null ? GameManager.Instance.view2Jitter : 0.0;
        if (isSimulation)
        {
            double simC = 5000.0;
            double simV = GameManager.Instance != null ? GameManager.Instance.simVDrone : 3000.0;
            double dist = isView2 ? (DistObserver + droneJitter) : (front ? DistFront : DistBack);
            double relSpeed = isView2 ? simC : (front ? (simC + simV) : (simC - simV));
            double timeS = dist / relSpeed;
            waveText.text = $"Зафіксували {label} через {timeS:F5} с";
        }
        else
        {
            double dist = isView2 ? (DistObserver + droneJitter) : (front ? DistFront : DistBack);
            double relSpeed;
            if (isView2)
                relSpeed = SpeedOfLight;
            else
                relSpeed = front ? (SpeedOfLight + DroneSpeed) : (SpeedOfLight - DroneSpeed);
            double timeNs = (dist / relSpeed) * 1e9;
            waveText.text = $"Зафіксували {label} через {timeNs:F2} нс";
        }

        waveText.gameObject.SetActive(true);
        _textSet = true;

        if (!front)
        {
            RestartManager rm = FindObjectOfType<RestartManager>();
            if (rm != null)
                rm.ShowRestart();
        }
    }

    bool IsAnyPartVisible(Camera cam, Vector3 center, float radius)
    {
        Vector3[] points =
        {
            center + Vector3.forward * radius,
            center + Vector3.back * radius,
            center + Vector3.left * radius,
            center + Vector3.right * radius,
            center + Vector3.up * radius,
            center + Vector3.down * radius
        };

        foreach (var p in points)
        {
            Vector3 v = cam.WorldToViewportPoint(p);
            if (v.z > 0 && v.x >= 0 && v.x <= 1 && v.y >= 0 && v.y <= 1)
                return true;
        }

        return false;
    }

    public void ResetText()
    {
        _textSet = false;
        if (waveText != null)
            waveText.gameObject.SetActive(false);
    }

    public void ResetSize()
    {
        _sizeMultiplier = 1f;
        var main = _ps.main;
        main.startSizeMultiplier = _baseStartSize;
    }
}