using UnityEngine;

[RequireComponent(typeof(SphereCollider))]
public class NPCInteract : MonoBehaviour
{
    public DialogueNode startNode;
    public string npcDisplayName = "Смотритель ворот";
    public float interactionRadius = 3f;
    public KeyCode interactKey = KeyCode.E;
    public DialogueManager dialogueManager;
    public Renderer highlightRenderer;
    public Color highlightColor = new Color(1f, 0.78f, 0.22f, 1f);

    private Transform player;
    private bool playerInRange;
    private Color baseColor;
    private Material runtimeMaterial;

    private void Awake()
    {
        SphereCollider trigger = GetComponent<SphereCollider>();
        trigger.isTrigger = true;
        trigger.radius = interactionRadius;

        if (highlightRenderer == null)
            highlightRenderer = GetComponentInChildren<Renderer>();

        if (highlightRenderer != null)
        {
            runtimeMaterial = highlightRenderer.material;
            baseColor = runtimeMaterial.color;
        }
    }

    private void Start()
    {
        if (dialogueManager == null)
            dialogueManager = DialogueManager.Instance;

        SimplePlayerController controller = FindObjectOfType<SimplePlayerController>();
        if (controller != null)
            player = controller.transform;
    }

    private void Update()
    {
        if (player != null)
            SetPlayerInRange(Vector3.Distance(transform.position, player.position) <= interactionRadius);

        bool dialogueActive = dialogueManager != null && dialogueManager.IsDialogueActive;

        if (!playerInRange || dialogueActive)
            return;

        ShowHint();

        if (Input.GetKeyDown(interactKey) && startNode != null && dialogueManager != null)
            dialogueManager.StartDialogue(startNode, npcDisplayName);
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.GetComponentInParent<SimplePlayerController>() != null)
        {
            player = other.transform;
            SetPlayerInRange(true);
        }
    }

    private void OnTriggerExit(Collider other)
    {
        if (other.GetComponentInParent<SimplePlayerController>() != null)
            SetPlayerInRange(false);
    }

    private void OnDrawGizmosSelected()
    {
        Gizmos.color = new Color(1f, 0.75f, 0.2f, 0.25f);
        Gizmos.DrawSphere(transform.position, interactionRadius);
        Gizmos.color = new Color(1f, 0.75f, 0.2f, 1f);
        Gizmos.DrawWireSphere(transform.position, interactionRadius);
    }

    private void SetPlayerInRange(bool inRange)
    {
        if (playerInRange == inRange)
            return;

        playerInRange = inRange;
        SetHighlight(inRange);

        if (!inRange && DialogueHUD.Instance != null)
            DialogueHUD.Instance.HideHint();
    }

    private void SetHighlight(bool enabled)
    {
        if (runtimeMaterial == null)
            return;

        runtimeMaterial.color = enabled ? highlightColor : baseColor;
    }

    private void ShowHint()
    {
        if (DialogueHUD.Instance != null)
            DialogueHUD.Instance.ShowHint("Нажмите E для разговора");
        else if (dialogueManager != null && dialogueManager.hintText != null)
        {
            dialogueManager.hintText.text = "Нажмите E для разговора";
            dialogueManager.hintText.gameObject.SetActive(true);
        }
    }
}