using GTA;
using GTA.Math;
using GTA.Native;
using RageCoop.Core;
using System;
using System.Collections.Generic;
using System.Linq;

namespace RageCoop.Client
{
    /// <summary>
    /// A synchronized vehicle instance
    /// </summary>
    public partial class SyncedVehicle : SyncedEntity
    {

        #region -- CONSTRUCTORS --

        /// <summary>
        /// Create a local entity (outgoing sync)
        /// </summary>
        /// <param name="v"></param>
        internal SyncedVehicle(Vehicle v)
        {

            ID = EntityPool.RequestNewID();
            MainVehicle = v;
            MainVehicle.CanPretendOccupants = false;
            OwnerID = Main.LocalPlayerID;
            SetUpFixedData();

        }
        internal void SetUpFixedData()
        {
            if (MainVehicle == null) { return; }

            IsAircraft = MainVehicle.IsAircraft;
            IsMotorcycle = MainVehicle.IsMotorcycle;
            HasRocketBoost = MainVehicle.HasRocketBoost;
            HasParachute = MainVehicle.HasParachute;
            HasRoof = MainVehicle.HasRoof;
            IsSubmarineCar = MainVehicle.IsSubmarineCar;
            IsDeluxo = MainVehicle.Model == 1483171323;
        }

        /// <summary>
        /// Create an empty VehicleEntity
        /// </summary>
        internal SyncedVehicle()
        {

        }
        internal SyncedVehicle(int id)
        {
            ID = id;
            LastSynced = Main.Ticked;
        }
        #endregion
        /// <summary>
        /// VehicleSeat,ID
        /// </summary>

        internal override void Update()
        {
#if DEBUG_VEH
            foreach(var s in _predictedTrace)
            {
                World.DrawMarker(MarkerType.DebugSphere, s, default, default, new Vector3(0.3f, 0.3f, 0.3f), Color.AliceBlue);
            }
            foreach (var s in _orgTrace)
            {
                World.DrawMarker(MarkerType.DebugSphere, s, default, default, new Vector3(0.3f, 0.3f, 0.3f), Color.Orange);
            }
#endif


            // Check if all data avalible
            if (!IsReady || Owner == null) { return; }

            // Check existence
            if ((MainVehicle == null) || (!MainVehicle.Exists()) || (MainVehicle.Model != Model))
            {
                if (!CreateVehicle())
                {
                    return;
                }
            }


            DisplayVehicle();
            // Skip update if no new sync message has arrived.
            if (!NeedUpdate)
            {
                return;
            }

            if (SteeringAngle != MainVehicle.SteeringAngle)
            {
                MainVehicle.CustomSteeringAngle((float)(Math.PI / 180) * SteeringAngle);
            }
            MainVehicle.ThrottlePower = ThrottlePower;
            MainVehicle.BrakePower = BrakePower;

            if (IsDead)
            {
                if (MainVehicle.IsDead)
                {
                    return;
                }

                MainVehicle.Explode();
            }
            else
            {
                if (MainVehicle.IsDead)
                {
                    Main.Delay(() =>
                    {
                        if (MainVehicle.IsDead && !IsDead)
                        {
                            MainVehicle.Repair();
                        }
                    }, 1000);
                }
            }
            if (MainVehicle.IsOnFire)
            {
                if (!Flags.HasVehFlag(VehicleDataFlags.IsOnFire))
                {
                    Function.Call(Hash.STOP_ENTITY_FIRE, MainVehicle);
                }
            }
            else if (Flags.HasVehFlag(VehicleDataFlags.IsOnFire))
            {
                Function.Call(Hash.START_ENTITY_FIRE, MainVehicle);
            }

            if (EngineRunning != MainVehicle.IsEngineRunning)
            {
                MainVehicle.IsEngineRunning = EngineRunning;
            }

            if (LightsOn != MainVehicle.AreLightsOn)
            {
                MainVehicle.AreLightsOn = LightsOn;
            }

            if (HighBeamsOn != MainVehicle.AreHighBeamsOn)
            {
                MainVehicle.AreHighBeamsOn = HighBeamsOn;
            }

            if (IsAircraft)
            {
                if (LandingGear != (byte)MainVehicle.LandingGearState)
                {
                    MainVehicle.LandingGearState = (VehicleLandingGearState)LandingGear;
                }
            }
            else
            {
                if (MainVehicle.HasSiren && SireneActive != MainVehicle.IsSirenActive)
                {
                    MainVehicle.IsSirenActive = SireneActive;
                }

                if (HornActive)
                {
                    if (!_lastHornActive)
                    {
                        _lastHornActive = true;
                        MainVehicle.SoundHorn(99999);
                    }
                }
                else if (_lastHornActive)
                {
                    _lastHornActive = false;
                    MainVehicle.SoundHorn(1);
                }

                if (HasRoof && MainVehicle.RoofState != RoofState)
                {
                    MainVehicle.RoofState = RoofState;
                }

                if (HasRocketBoost && Flags.HasFlag(VehicleDataFlags.IsRocketBoostActive) != MainVehicle.IsRocketBoostActive())
                {
                    MainVehicle.SetRocketBoostActive(Flags.HasFlag(VehicleDataFlags.IsRocketBoostActive));
                }
                if (HasParachute && Flags.HasFlag(VehicleDataFlags.IsParachuteActive) != MainVehicle.IsParachuteActive())
                {
                    MainVehicle.SetParachuteActive(Flags.HasFlag(VehicleDataFlags.IsParachuteActive));
                }
                if (IsSubmarineCar)
                {
                    if (Transformed)
                    {
                        if (!_lastTransformed)
                        {
                            _lastTransformed = true;
                            Function.Call(Hash.TRANSFORM_TO_SUBMARINE, MainVehicle.Handle, false);
                        }
                    }
                    else if (_lastTransformed)
                    {
                        _lastTransformed = false;
                        Function.Call(Hash.TRANSFORM_TO_CAR, MainVehicle.Handle, false);
                    }
                }
                else if (IsDeluxo)
                {
                    MainVehicle.SetDeluxoHoverState(IsDeluxoHovering);
                    if (IsDeluxoHovering)
                    {
                        MainVehicle.SetDeluxoWingRatio(DeluxoWingRatio);
                    }
                }

                Function.Call(Hash.SET_VEHICLE_BRAKE_LIGHTS, MainVehicle.Handle, BrakeLightsOn);


            }
            MainVehicle.LockStatus = LockStatus;

            if (LastFullSynced >= LastUpdated)
            {
                if (Flags.HasVehFlag(VehicleDataFlags.Repaired))
                {
                    MainVehicle.Repair();
                }
                if (Colors != null && Colors != _lastVehicleColors)
                {
                    Function.Call(Hash.SET_VEHICLE_COLOURS, MainVehicle, Colors[0], Colors[1]);

                    _lastVehicleColors = Colors;
                }
                MainVehicle.EngineHealth = EngineHealth;
                if (Mods != null && !Mods.Compare(_lastVehicleMods))
                {
                    Function.Call(Hash.SET_VEHICLE_MOD_KIT, MainVehicle, 0);

                    foreach (KeyValuePair<int, int> mod in Mods)
                    {
                        MainVehicle.Mods[(VehicleModType)mod.Key].Index = mod.Value;
                    }

                    _lastVehicleMods = Mods;
                }

                if (Function.Call<string>(Hash.GET_VEHICLE_NUMBER_PLATE_TEXT, MainVehicle) != LicensePlate)
                {
                    Function.Call(Hash.SET_VEHICLE_NUMBER_PLATE_TEXT, MainVehicle, LicensePlate);
                }

                if (_lastLivery != Livery)
                {
                    Function.Call(Hash.SET_VEHICLE_LIVERY, MainVehicle, Livery);
                    _lastLivery = Livery;
                }
                MainVehicle.SetDamageModel(DamageModel);
            }
            LastUpdated = Main.Ticked;
        }

        private void DisplayVehicle()
        {
            _predictedPosition = Predict(Position);
            var current = MainVehicle.ReadPosition();
            var dist = current.DistanceTo(_predictedPosition);
            var cali = dist * (_predictedPosition - current);
            if (Velocity.Length() < 0.1) { cali *= 10; }
            if (dist > 10)
            {
                MainVehicle.Position = _predictedPosition;
                MainVehicle.Velocity = Velocity;
                MainVehicle.Quaternion = Quaternion;
                return;
            }
            if (dist > 0.03)
            {
                MainVehicle.Velocity = Velocity + cali;
            }

            Vector3 calirot;
            if (IsFlipped || (calirot = GetCalibrationRotation()).Length() > 50)
            {
                MainVehicle.Quaternion = Quaternion.Slerp(MainVehicle.ReadQuaternion(), Quaternion, 0.5f);
                MainVehicle.RotationVelocity = RotationVelocity;
                return;
            }
            MainVehicle.RotationVelocity = RotationVelocity + calirot * 0.2f;
        }
        private Vector3 GetCalibrationRotation()
        {
            var rot = Quaternion.LookRotation(Quaternion * Vector3.RelativeFront, Quaternion * Vector3.RelativeTop).ToEulerAngles();
            var curRot = Quaternion.LookRotation(MainVehicle.ReadQuaternion() * Vector3.RelativeFront, MainVehicle.ReadQuaternion() * Vector3.RelativeTop).ToEulerAngles();

            var r = (rot - curRot).ToDegree();
            if (r.X > 180) { r.X = r.X - 360; }
            else if (r.X < -180) { r.X = 360 + r.X; }

            if (r.Y > 180) { r.Y = r.Y - 360; }
            else if (r.Y < -180) { r.Y = 360 + r.Y; }

            if (r.Z > 180) { r.Z = r.Z - 360; }
            else if (r.Z < -180) { r.Z = 360 + r.Z; }
            return r;
        }
        private bool CreateVehicle()
        {
            var existing = World.GetNearbyVehicles(Position, 2).ToList().FirstOrDefault();
            if (existing != null && existing != MainVehicle)
            {
                if (EntityPool.VehiclesByHandle.ContainsKey(existing.Handle))
                {
                    EntityPool.RemoveVehicle(ID);
                    return false;
                }
                existing.Delete();
            }
            MainVehicle?.Delete();
            MainVehicle = Util.CreateVehicle(Model, Position);
            if (!Model.IsInCdImage)
            {
                // GTA.UI.Notification.Show($"~r~(Vehicle)Model ({CurrentVehicleModelHash}) cannot be loaded!");
                return false;
            }
            if (MainVehicle == null)
            {
                Model.Request();
                return false;
            }
            lock (EntityPool.VehiclesLock)
            {
                EntityPool.Add(this);
            }
            MainVehicle.Quaternion = Quaternion;
            if (MainVehicle.HasRoof)
            {
                MainVehicle.RoofState = RoofState;
            }
            foreach (var w in MainVehicle.Wheels)
            {
                w.Fix();
            }
            if (IsInvincible) { MainVehicle.IsInvincible = true; }
            SetUpFixedData();
            Model.MarkAsNoLongerNeeded();
            return true;
        }
    }
}