using UnityEngine;

public class ShellController : MonoBehaviour
{
    [Header("Shell Parts")]
    [Tooltip("¿­¸®°í ´ÝÈ÷´Â À­Á¶°³ Transform")]
    [SerializeField] private Transform upperShell;

    [Header("Timing")]
    [SerializeField] private float openDuration = 1.5f;
    [SerializeField] private float closedDuration = 1.5f;

    [Header("Animation")]
    [SerializeField] private float closedAngle = 0f;
    [SerializeField] private float openAngle = -65f;
    [SerializeField] private float rotateSpeed = 8f;

    [Header("Start State")]
    [SerializeField] private bool startOpen = false;

    public bool IsOpen { get; private set; }
    public float StateTimer01 { get; private set; }

    private float timer;

    private void Start()
    {
        IsOpen = startOpen;
        timer = 0f;
        UpdateShellVisual(true);
    }

    private void Update()
    {
        UpdateShellState();
        UpdateShellVisual(false);
    }

    private void UpdateShellState()
    {
        timer += Time.deltaTime;

        float currentDuration = IsOpen ? openDuration : closedDuration;

        if (currentDuration <= 0f)
            currentDuration = 0.1f;

        StateTimer01 = Mathf.Clamp01(timer / currentDuration);

        if (timer >= currentDuration)
        {
            IsOpen = !IsOpen;
            timer = 0f;
            StateTimer01 = 0f;
        }
    }

    private void UpdateShellVisual(bool instant)
    {
        if (upperShell == null)
            return;

        float targetAngle = IsOpen ? openAngle : closedAngle;
        Quaternion targetRotation = Quaternion.Euler(targetAngle, 0f, 0f);

        if (instant)
        {
            upperShell.localRotation = targetRotation;
        }
        else
        {
            upperShell.localRotation = Quaternion.Lerp(
                upperShell.localRotation,
                targetRotation,
                Time.deltaTime * rotateSpeed
            );
        }
    }

    public void ResetShell()
    {
        IsOpen = startOpen;
        timer = 0f;
        StateTimer01 = 0f;
        UpdateShellVisual(true);
    }
}