using System.Collections;
using System.Collections.Generic;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;
using UnityEngine;

public class RocketCameraController : MonoBehaviour
{
    [Header("Камера")]
    [SerializeField] private Camera mainCamera;
    [SerializeField] private Transform rocketRoot;
    [SerializeField] private float baseFOV = 60f;

    private Vector3 _cameraStartPos;
    private Quaternion _cameraStartRot;
    private Vector3 _rocketStartPos;
    private Vector3 _camVelocity = Vector3.zero;
    private bool _isActive;
    private RocketFlightCore _core;
    private float _flightTimer;
    private float _swayTime;

    private float _currentShake;
    private float _targetFOV;

    public void Initialize(RocketFlightCore core)
    {
        _core = core;
        _cameraStartPos = mainCamera.transform.position;
        _cameraStartRot = mainCamera.transform.rotation;
        _rocketStartPos = rocketRoot != null ? rocketRoot.position : Vector3.zero;
        baseFOV = mainCamera.fieldOfView;
        _targetFOV = baseFOV;
    }

    public void StartFlight()
    {
        _isActive = true;
        _flightTimer = 0f;
        _swayTime = 0f;
        _camVelocity = Vector3.zero;
        _currentShake = 0f;
    }

    public void StopFlight()
    {
        _isActive = false;
    }

    public void ResetCamera()
    {
        _isActive = false;
        _flightTimer = 0f;
        _camVelocity = Vector3.zero;
        _currentShake = 0f;
        mainCamera.transform.position = _cameraStartPos;
        mainCamera.transform.rotation = _cameraStartRot;
        mainCamera.fieldOfView = baseFOV;
    }

    public void TriggerSonicBoom()
    {
        StartCoroutine(SonicBoomShake());
    }

    public void SwitchToSpaceDrift() { }

    public void StartIgnitionShake(float shakeMultiplier)
    {
        StartCoroutine(IgnitionShake(shakeMultiplier));
    }

    private void Update()
    {
        if (!_isActive || _core == null || mainCamera == null) return;

        _flightTimer += Time.deltaTime;
        _swayTime += Time.deltaTime;

        UpdateCameraFollow();
        UpdateFOV();
        UpdateCameraRotation();
    }

    private void UpdateCameraFollow()
    {
        float rocketVisualY = rocketRoot.position.y - _rocketStartPos.y;
        float speedNorm = _core.GetSpeedNormalized();
        float spaceProgress = _core.GetSpaceProgress();

        float swayX = Mathf.Sin(_swayTime * 13.7f) * speedNorm * 0.06f;
        float swayY = Mathf.Sin(_swayTime * 9.3f) * speedNorm * 0.03f;

        float smoothTime = _core.FuelCutoff
            ? 0.4f
            : Mathf.Lerp(0.04f, 0.12f, spaceProgress);

        Vector3 target = _cameraStartPos
            + Vector3.up * rocketVisualY
            + new Vector3(swayX, swayY, 0f);

        mainCamera.transform.position = Vector3.SmoothDamp(
            mainCamera.transform.position,
            target,
            ref _camVelocity,
            smoothTime);

        if (_currentShake > 0f)
        {
            _currentShake = Mathf.Lerp(_currentShake, 0f, Time.deltaTime * 3f);
            mainCamera.transform.position += new Vector3(
                Random.Range(-_currentShake, _currentShake),
                Random.Range(-_currentShake * 0.5f, _currentShake * 0.5f),
                0f);
        }
    }

    private void UpdateFOV()
    {
        float speedNorm = _core.GetSpeedNormalized();
        float spaceProgress = _core.GetSpaceProgress();

        if (_core.FuelCutoff)
        {
            _targetFOV = Mathf.Lerp(_targetFOV, baseFOV, Time.deltaTime * 1.5f);
        }
        else if (spaceProgress > 0.1f)
        {
            _targetFOV = Mathf.Lerp(baseFOV + speedNorm * 15f, baseFOV + 22f, Mathf.Clamp01(spaceProgress * 2f));
        }
        else
        {
            _targetFOV = baseFOV + speedNorm * 20f;
        }

        mainCamera.fieldOfView = Mathf.Lerp(mainCamera.fieldOfView, _targetFOV, Time.deltaTime * 5f);
    }

    private void UpdateCameraRotation()
    {
        float speedNorm = _core.GetSpeedNormalized();
        float spaceProgress = _core.GetSpaceProgress();

        float roll = Mathf.Sin(_swayTime * 5f) * speedNorm * 0.6f;
        float tiltForward = spaceProgress > 0.3f
            ? Mathf.Lerp(0f, 4f, (spaceProgress - 0.3f) / 0.7f)
            : 0f;

        mainCamera.transform.rotation = Quaternion.Slerp(
            mainCamera.transform.rotation,
            _cameraStartRot * Quaternion.Euler(tiltForward, 0f, roll),
            Time.deltaTime * 2f);
    }

    private IEnumerator IgnitionShake(float shakeMultiplier)
    {
        float elapsed = 0f;
        float duration = 2.0f;
        while (elapsed < duration)
        {
            elapsed += Time.deltaTime;
            float progress = elapsed / duration;
            float power = progress < 0.15f
                ? Mathf.Lerp(0f, 0.5f * shakeMultiplier, progress / 0.15f)
                : Mathf.Lerp(0.5f * shakeMultiplier, 0.02f * shakeMultiplier, (progress - 0.15f) / 0.85f);
            _currentShake = power;
            yield return null;
        }
        _currentShake = 0f;
    }

    private IEnumerator SonicBoomShake()
    {
        float elapsed = 0f;
        float duration = 0.6f;
        while (elapsed < duration)
        {
            elapsed += Time.deltaTime;
            _currentShake = Mathf.Lerp(0.4f, 0f, elapsed / duration);
            yield return null;
        }
        _currentShake = 0f;
    }
}