using Unity.Netcode;
using UnityEngine;
using UnityEngine.InputSystem;

public sealed class PlayerInteractionController : NetworkBehaviour, IPlayerSystem
{
    [SerializeField, Min(0.1f)] private float interactionDistance = 3f;
    [SerializeField] private LayerMask interactionMask = ~0;

    private Camera playerCamera;
    private IInteractable focusedInteractable;
    private IPlayerInteractionSession activeSession;
    private bool activeSessionReleaseRequested;
    private bool isInitialized;

    public void Initialize(PlayerFacade facade)
    {
        playerCamera = GetComponentInChildren<Camera>(true);
        isInitialized = playerCamera != null;
    }

    private void Update()
    {
        if (!isInitialized || !IsOwner || Keyboard.current == null)
            return;

        if (PlayerInteractionSessionRegistry.TryGetControlledSession(
                OwnerClientId,
                out activeSession))
        {
            focusedInteractable = null;

            if (!Keyboard.current.eKey.isPressed && !activeSessionReleaseRequested)
            {
                activeSessionReleaseRequested = true;
                activeSession.RequestRelease();
            }

            return;
        }

        activeSession = null;
        activeSessionReleaseRequested = false;
        focusedInteractable = FindFocusedInteractable();

        if (Keyboard.current.eKey.wasPressedThisFrame &&
            focusedInteractable != null &&
            focusedInteractable.IsInteractionAvailable)
        {
            focusedInteractable.RequestInteraction();
        }
    }

    private IInteractable FindFocusedInteractable()
    {
        Ray ray = new(playerCamera.transform.position, playerCamera.transform.forward);
        if (!Physics.Raycast(ray, out RaycastHit hit, interactionDistance, interactionMask, QueryTriggerInteraction.Collide))
            return null;

        foreach (MonoBehaviour component in hit.collider.GetComponentsInParent<MonoBehaviour>())
        {
            if (component is IInteractable interactable)
                return interactable;
        }

        return null;
    }

    private void OnGUI()
    {
        if (!IsOwner)
            return;

        if (activeSession != null)
        {
            DrawPrompt(activeSession.ReleasePrompt);
            return;
        }

        if (focusedInteractable == null)
            return;

        string prompt = focusedInteractable.IsInteractionAvailable
            ? "[E] " + focusedInteractable.InteractionPrompt
            : "In use";
        DrawPrompt(prompt);
    }

    private static void DrawPrompt(string prompt)
    {
        GUIStyle style = new(GUI.skin.label)
        {
            alignment = TextAnchor.MiddleCenter,
            fontSize = 16,
            normal = { textColor = Color.white }
        };

        Rect area = new(0f, Screen.height * 0.62f, Screen.width, 28f);
        GUI.Label(area, prompt, style);
    }
}