using System;
using CitizenFX.Core;
using CitizenFX.Core.Native;
using CitizenFX.Core.UI;
using TaxiJob.Client.Extensions;

namespace TaxiJob.Client.Handler {
    public static class NpcTaxiHandler {
        public static bool IsCustomer;
        private static Vehicle _taxi;
        private static Blip _blip;
        private static Ped _driver;

        private static bool _arrived;
        private static bool _hasDestination;
        private static Vector3 _destination;
        private static bool _atDestination;
        private static int _lastUpdate;
        private static Vector3 _lastPosition;
        private static bool _pause;

        public static async void StartNpcJob() {
            if (IsCustomer) return;
            await BaseScript.Delay(5000);
            Notify.Info("Ein Taxi ist auf dem Weg zu ihnen!");
            var spawn = GetDistantSpawn(700);
            
            // Spawn Taxi
            var model = (Model)VehicleHash.Taxi;
            await model.Load();
            _taxi = await World.CreateVehicle(model, spawn.ToVector3(), spawn.W);
            _taxi.Mods.LicensePlate = await TaxiJob.GeneratePlate();
            _taxi.AsMissionEntry();
            TaxiJob.SetFuel(_taxi, 100.0f);
            
            // Blip
            _blip = new Blip(API.AddBlipForEntity(_taxi.Handle));
            _blip.Sprite = (BlipSprite)198;
            _blip.Color = BlipColor.Yellow;
            _blip.Name = "Taxi";
            
            // Driver
            model = new Model(-573920724);
            await model.Load();
            _driver = await World.CreatePed(model, spawn.ToVector3());
            _driver.SetIntoVehicle(_taxi, VehicleSeat.Driver);
            _driver.CanBeTargetted = false;
            _driver.AsMissionEntry();
            
            // Drive to Player
            _driver.Task.DriveTo(_taxi, World.GetNextPositionOnStreet(Game.PlayerPed.Position), 10f, 20f, 262975);
            Taximeter.Reset();
            _lastPosition = _taxi.Position;
            Taximeter.Pause(false);
            _arrived = false;
            _pause = false;
            IsCustomer = true;
        }

        public static void OnTick() {
            if (!_driver.IsInVehicle(_taxi)) {
                TaxiJob.SetFuel(_taxi, 0.0f);
                IsCustomer = false;
                _blip?.Delete();
                _blip = null;
                Taximeter.Reset();
            }
            
            if (!_arrived && Game.PlayerPed.IsInVehicle(_taxi)) {
                _arrived = true;
                _atDestination = false;
                _hasDestination = false;
                _driver.PlayAmbientSpeech("GENERIC_HI");
                _blip?.Delete();
                _blip = null;
                Taximeter.SetVisible(true);
            }

            if (_arrived && !_hasDestination && World.WaypointPosition != Vector3.Zero) {
                _hasDestination = true;
                _destination = World.GetNextPositionOnStreet(World.WaypointPosition);
                _driver.Task.DriveTo(_taxi, _destination, 10f, 20f, 262975);
            }

            if (_hasDestination && !_atDestination && World.GetDistance(_taxi.Position, _destination) <= 10.5f && !Game.PlayerPed.IsInVehicle(_taxi)) {
                _atDestination = true;
                
                var price = (int)Math.Round(Convert.ToSingle(Taximeter.Attributes.CurrentFare) + 0.5f);
                BaseScript.TriggerServerEvent("taxijob:server:bill", price, Game.Player.ServerId);
                
                Taximeter.Reset();
            }

            if (_atDestination && World.GetDistance(_taxi.Position, Game.PlayerPed.Position) >= 5) {
                _taxi.MarkAsNoLongerNeeded();
                _driver.MarkAsNoLongerNeeded();

                _hasDestination = false;
                _destination = Vector3.Zero;
                _atDestination = false;
                _taxi = null;
                _driver = null;
                IsCustomer = false;
            }

            var current = Game.GameTime;
            if (current - _lastUpdate >= 2000) {
                _lastUpdate = current;
                Taximeter.CalculatePrice(_lastPosition, _taxi.Position);
                _lastPosition = _taxi.Position;
            }
            
            if (!(_hasDestination && !_atDestination)) return;
            
            Screen.DisplayHelpTextThisFrame("Drücke ~INPUT_VEH_SHUFFLE~ um die Fahrt " + (_pause ? "fortzusetzen" : "zu pausieren"));
            if (Game.IsControlJustReleased(0, Control.VehicleShuffle)) {
                if (_pause) {
                    if (World.WaypointPosition != Vector3.Zero) _destination = World.GetNextPositionOnStreet(World.WaypointPosition);
                    _driver?.Task.DriveTo(_taxi, _destination, 10f, 20f, 262975);
                }
                else {
                    _driver?.Task.DriveTo(_taxi, _taxi.Position + (_taxi.ForwardVector * 20f), 10f, 5f, 262975);
                }
                _pause = !_pause;
            }

            if (!Game.PlayerPed.IsInVehicle(_taxi)) {
                _atDestination = true;
                
                var price = (int)Math.Round(Convert.ToSingle(Taximeter.Attributes.CurrentFare) + 0.5f);
                BaseScript.TriggerServerEvent("taxijob:server:bill", price, Game.Player.ServerId);
                
                Taximeter.Reset();
            }
        }

        private static Vector4 GetDistantSpawn(int distance) {
            Vector3 player = Game.PlayerPed.Position;
            Vector3 location = Vector3.Zero;
            float heading = 0f;
            int unused = 0;
            API.GetNthClosestVehicleNodeWithHeading(player.X, player.Y, player.Z, distance, ref location, ref heading, ref unused, 9, 3.0f, 2.5f);
            return new Vector4(location, heading);
        }
    }
}