using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using MessagePack;
using Newtonsoft.Json;
using Unity.Mathematics;
using static Unity.Mathematics.math;

[MessagePackObject, JsonObject(MemberSerialization.OptIn), EntityTypeRestriction(HullType.Ship), Order(-100)]
public class MiningControllerData : ControllerData
{
    public override IBehavior CreateInstance(ItemManager context, Entity entity, EquippedItem item)
    {
        return new MiningController(context, this, entity, item);
    }
}

public class MiningController : ControllerBase<Mining>, IBehavior, IPersistentBehavior, IInitializableBehavior
{
    public BehaviorData Data => _data;
    
    private MiningControllerData _data;
    private EquippedItem Item { get; }
    private bool _taskStarted;
    private int _asteroid = -1;
    private MiningTool _miningTool;
    private Switch _toolSwitch;
    
    public MiningController(ItemManager itemManager, MiningControllerData data, Entity entity, EquippedItem item) : base(itemManager, data, entity)
    {
        _data = data;
        Item = item;
    }

    public new void Initialize()
    {
        _miningTool = Entity.GetBehavior<MiningTool>();
        _toolSwitch = Entity.GetSwitch<MiningTool>();
        base.Initialize();
    }

    public new bool Update(float delta)
    {
        // if (Task != null)
        // {
        //     if (!_taskStarted)
        //     {
        //         NextAsteroid();
        //         _taskStarted = true;
        //     }
        //     else
        //     {
        //         if (!Moving)
        //         {
        //             if (_entity.OccupiedCapacity < _entity.Capacity - 1)
        //             {
        //                 var asteroidTransform = Zone.GetAsteroidTransform(Task.Asteroids, _asteroid);
        //                 if (length(_entity.Position - asteroidTransform.xy) - asteroidTransform.w > _miningTool.Range)
        //                 {
        //                     _entity.SetMessage("Moving to target asteroid.");
        //                     MoveTo(() => Zone.GetAsteroidTransform(Task.Asteroids, _asteroid).xy, 
        //                         () => Zone.GetAsteroidVelocity(Task.Asteroids, _asteroid));
        //                     _toolSwitch.Activated = false;
        //                 }
        //                 else
        //                 {
        //                     if (Zone.AsteroidExists(Task.Asteroids, _asteroid))
        //                     {
        //                         _miningTool.AsteroidBelt = Task.Asteroids;
        //                         _miningTool.Asteroid = _asteroid;
        //                         _toolSwitch.Activated = true;
        //                         Aim.Objective = Zone.GetAsteroidTransform(Task.Asteroids, _asteroid).xy;
        //                         Aim.Update(delta);
        //                     }
        //                     else NextAsteroid();
        //                 }
        //             }
        //             else
        //             {
        //                 _entity.SetMessage("Out of cargo space. Returning home to offload cargo.");
        //                 GoHome(OnArriveHome);
        //             }
        //         }
        //     }
        // }
        return base.Update(delta);
    }

    // private void OnArriveHome()
    // {
    //     var homeEntity = _context.ItemData.Get<Entity>(HomeEntity);
    //     foreach (var item in _entity.Cargo
    //         .Select(id => _context.ItemData.Get<ItemInstance>(id))
    //         .Where(item => item is SimpleCommodity)
    //         .Cast<SimpleCommodity>()
    //         .ToArray())
    //     {
    //         int quantity = min((int) ((homeEntity.Capacity - homeEntity.OccupiedCapacity) / _context.GetData(item).Size), item.Quantity);
    //         var newItem = _entity.RemoveCargo(item, quantity);
    //         homeEntity.AddCargo(newItem);
    //         
    //         if (quantity < item.Quantity)
    //         {
    //             homeEntity.SetMessage("Colony is out of cargo space. Closing Mining Task.");
    //             FinishTask();
    //             _taskStarted = false;
    //             return;
    //         }
    //     }
    // }

    private void NextAsteroid()
    {
        _asteroid = Zone.NearestAsteroid(Task.Asteroids, Entity.Position);
        Entity.SetMessage("Selecting new asteroid.");
    }

    public PersistentBehaviorData Store()
    {
        return new MiningControllerPersistence
        {
            Task = Task
        };
    }

    public void Restore(PersistentBehaviorData data)
    {
        var miningControllerPersistence = data as MiningControllerPersistence;
        Task = miningControllerPersistence.Task;
    }
}

public class MiningControllerPersistence : PersistentBehaviorData
{
    [JsonProperty("task"), Key(0)]
    public Mining Task;
}