using UnityEngine;

public class CharacterMovement : MonoBehaviour
{
    public enum MovementState { Walking, Waiting, PlayingAnimation, Finished }
    public MovementState state = MovementState.Walking;

    public Transform[] waypoints;
    public float speed = 2f;

    private int currentWaypoint = 0;
    private Animator animator;

    [Header("Camera Zoom")]
    public CameraController cameraController;

    private string currentAnimName = "";
    private bool animStarted = false;

    void Start()
    {
        animator = GetComponentInChildren<Animator>();

        if (waypoints.Length == 0)
        {
            Debug.LogError("Waypoints not assigned.");
            return;
        }

        animator.SetTrigger("StartWalking");
    }

    void Update()
    {
        switch (state)
        {
            case MovementState.Walking:
                MoveToWaypoint();
                break;

            case MovementState.PlayingAnimation:
                WaitForAnimationToEnd();
                break;

            case MovementState.Waiting:
                // Do nothing until told to resume
                break;

            case MovementState.Finished:
                // All done
                break;
        }
    }

    void MoveToWaypoint()
    {
        if (currentWaypoint >= waypoints.Length)
        {
            state = MovementState.Finished;
            return;
        }

        Transform target = waypoints[currentWaypoint];
        transform.position = Vector3.MoveTowards(transform.position, target.position, speed * Time.deltaTime);
        transform.LookAt(target.position);

        if (Vector3.Distance(transform.position, target.position) < 0.1f)
        {
            switch (currentWaypoint)
            {
                case 0:
                    PlayAnimation("OpenDoor");
                    break;
                case 1:
                    PlayAnimation("StartWalking"); // walk inside again
                    state = MovementState.Walking;
                    break;
                case 2:
                    PlayAnimation("SitDown");
                    break;
            }

            currentWaypoint++;
        }
    }

    void PlayAnimation(string animName)
    {
        animator.SetTrigger(animName);
        currentAnimName = animName;
        animStarted = false;
        state = MovementState.PlayingAnimation;
    }

    void WaitForAnimationToEnd()
    {
        AnimatorStateInfo stateInfo = animator.GetCurrentAnimatorStateInfo(0);

        if (!animStarted)
        {
            if (stateInfo.IsName(currentAnimName))
            {
                animStarted = true;
            }
        }
        else
        {
            if (stateInfo.normalizedTime >= 1f && stateInfo.IsName(currentAnimName))
            {
                if (currentAnimName == "SitDown" && cameraController != null)
                {
                    cameraController.StartZoom();
                    state = MovementState.Finished;
                }
                else
                {
                    animator.SetTrigger("StartWalking");
                    state = MovementState.Walking;
                }
            }
        }
    }
}