using System.Text;
using RebootKit.Engine.UI;
using Unity.Netcode;
using UnityEngine;
using UnityEngine.UIElements;

namespace RebootKit.Engine.Development {
    public class DebugOverlayView : UIDocumentView {
        const string k_DebugLabelClassName = "rr__debug-label";
        
        VisualElement m_RootElement;
        
        Label m_FPSLabel;
        Label m_NetworkStatsLabel;

        void Update() {
            if (m_RootElement == null) {
                return;
            }

            Resolution resolution = Screen.currentResolution;
            m_FPSLabel.text = $"fps: {Mathf.RoundToInt(1f / Time.deltaTime)} | dt: {Time.deltaTime:F4}ms | runtime: {Time.time:F4}s | resolution: {resolution.width}x{resolution.height}@{resolution.refreshRateRatio}Hz";
            
            NetworkManager nm = NetworkManager.Singleton;
            
            StringBuilder sb = new StringBuilder();
            
            sb.Append("Network: ");
            sb.Append($"IsServer: {nm.IsServer.ToString()}");
            sb.Append($" | IsClient: {nm.IsClient.ToString()}");
            sb.Append($" | IsHost: {nm.IsHost.ToString()}");
            
            m_NetworkStatsLabel.text = sb.ToString();
        }

        public override VisualElement Build() {
            m_RootElement = new VisualElement();
            
            CreateLabel($"Toggle Overlay [F3] | RebootKit | game: {Application.productName}, version: {Application.version}");
            m_FPSLabel = CreateLabel($"FPS: {Application.targetFrameRate.ToString()}");
            
            m_NetworkStatsLabel = CreateLabel("Network Stats");
            
            return m_RootElement;
        }

        Label CreateLabel(string text) {
            Label label = (Label)LabelBuilder.New(text).Build();
            label.AddToClassList(k_DebugLabelClassName);

            m_RootElement.Add(label);
            return label;
        }
    }
}