using HarmonyLib;
using UnityEngine;
using UnityModManagerNet;

namespace RailroaderPhysicsOverhaul;

public static class Main
{
    internal static UnityModManager.ModEntry ModEntry { get; private set; }
    public  static ModSettings Settings { get; private set; }

    public static bool Load(UnityModManager.ModEntry modEntry)
    {
        ModEntry = modEntry;

        // Load persisted settings (creates defaults if Settings.xml doesn't exist yet).
        Settings = ModSettings.Load(modEntry);

        // Apply settings to runtime state before any patches run.
        ConsistLOD.Enabled           = Settings.OptimizerEnabled;
        ConsistLOD.DistanceThreshold = Settings.DistanceThreshold;
        ConsistLOD.ResyncInterval    = Settings.ResyncInterval;
        ConsistLOD.BlacklistEnabled  = Settings.BlacklistEnabled;
        ConsistLOD.IsBlacklist       = Settings.IsBlacklist;
        foreach (string name in Settings.RoadNumberList)
            ConsistLOD.RoadNumberList.Add(name);

        ConsistLOD.ExcludeLocomotives           = Settings.ExcludeLocosFromLOD;
        ConsistFreezer.ExcludeLocomotives       = Settings.ExcludeLocosFromFreeze;
        ConsistFreezer.AutoFreezeEnabled        = Settings.AutoFreezeEnabled;
        ConsistFreezer.AutoFreezeDistance       = Settings.AutoFreezeDistance;
        ConsistFreezer.AutoFreezeSpeedThreshold = Settings.AutoFreezeSpeedThreshold;

        var harmony = new Harmony(modEntry.Info.Id);
        harmony.PatchAll();
        PhysicsTimer.TryPatchPositionCars(harmony, modEntry.Logger);

        var go = new GameObject("RailroaderPhysicsOverhaul.Overlay");
        Object.DontDestroyOnLoad(go);
        var overlay = go.AddComponent<PhysicsOverlayGUI>();
        overlay.Visible  = Settings.ShowOverlay;
        overlay.Opacity  = Settings.OverlayOpacity;
        go.AddComponent<CarDebugVisualizer>();

        // UMM settings panel callbacks.
        modEntry.OnGUI     = entry => SettingsGUI.Draw(entry, Settings);
        modEntry.OnSaveGUI = entry => Settings.Save(entry);

        modEntry.Logger.Log("RailroaderPhysicsOverhaul loaded.");
        return true;
    }
}