using TMPro;
using UnityEngine;

/// <summary>
/// On-screen match HUD binder: drives the authored <c>MatchHudCanvas</c> widgets from live match state -
/// the current sub-phase + countdown (top centre) and a hunter crosshair during the seek phase. The visual
/// layout lives in the scene; this component creates nothing at runtime, it only binds. Attach it to the
/// MatchHudCanvas and wire the references in the Inspector.
///
/// Passive overlay: the authored canvas has no <see cref="UnityEngine.UI.GraphicRaycaster"/> and every graphic
/// is raycastTarget=false, so it never consumes pointer events, and its sortingOrder (90) sits below PaintHud's
/// (100) so tool panels always win. There is no change event for the phase/timer, so the values are polled once
/// per frame; the visible strings are only rebuilt when the displayed second / phase actually changes.
/// </summary>
[DisallowMultipleComponent]
public class MatchHud : MonoBehaviour
{
    [Tooltip("HUD canvas, toggled with the match. Empty = the Canvas on this GameObject.")]
    [SerializeField] private Canvas _canvas;

    [Tooltip("Sub-phase label in the top bar.")]
    [SerializeField] private TMP_Text _phaseText;

    [Tooltip("Countdown label in the top bar.")]
    [SerializeField] private TMP_Text _timeText;

    [SerializeField] private TMP_Text _hunterCount;
    [SerializeField] private TMP_Text _hiderCount;

    [Tooltip("Crosshair, shown only for the hunter during the seek phase.")]
    [SerializeField] private GameObject _crosshair;

    private int _lastSecond = -1;
    private int _lastHunters = -1;
    private int _lastHiders = -1;
    private MatchManager.MatchSubPhase _lastPhase = (MatchManager.MatchSubPhase)(-1);

    private void Awake()
    {
        if (!_canvas) _canvas = GetComponent<Canvas>();
        if (!_canvas || !_phaseText || !_timeText || !_crosshair || !_hunterCount || !_hiderCount)
        {
            Debug.LogError("[MatchHud] Unwired reference(s) - assign Canvas/Phase/Time/Crosshair/HunterCount/HiderCount in the Inspector.", this);
            enabled = false;
            return;
        }

        // Toggling the Canvas component (not the GameObject) keeps this binder's Update alive while hidden.
        _canvas.enabled = false; // shown once a match is active
    }

    private void Update()
    {
        var match = MatchManager.Instance;
        bool active = match && match.MatchActive;
        if (_canvas.enabled != active) _canvas.enabled = active;
        if (!active) return;

        var phase = match.LocalSubPhase;
        if (phase != _lastPhase)
        {
            _lastPhase = phase;
            _phaseText.text = PhaseLabel(phase);
        }

        int s = Mathf.CeilToInt(Mathf.Max(0f, match.LocalPhaseRemaining));
        if (s != _lastSecond)
        {
            _lastSecond = s;
            _timeText.text = $"{s / 60:0}:{s % 60:00}";
        }

        NetworkPlayerSetup.CountRoles(out int hunters, out int hiders);
        if (hunters != _lastHunters)
        {
            _lastHunters = hunters;
            _hunterCount.text = hunters.ToString();
        }
        if (hiders != _lastHiders)
        {
            _lastHiders = hiders;
            _hiderCount.text = hiders.ToString();
        }

        bool showCross = phase == MatchManager.MatchSubPhase.Seek && NetworkPlayerSetup.LocalViewerIsHunter();
        if (_crosshair.activeSelf != showCross) _crosshair.SetActive(showCross);
    }

    private static string PhaseLabel(MatchManager.MatchSubPhase phase)
    {
        switch (phase)
        {
            case MatchManager.MatchSubPhase.Hide: return "Hide";
            case MatchManager.MatchSubPhase.Seek: return "Seek";
            case MatchManager.MatchSubPhase.Resolution: return "Resolution";
            default: return "";
        }
    }
}