/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */

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

public abstract class Behavior
{
    public BehaviorData Data { get; }
    public EquippedItem Item { get; }
    private ConsumableItemEffect Consumable { get; }
    protected ItemManager ItemManager { get; }

    protected Entity Entity => Item?.Entity ?? Consumable.Entity;
    public float Temperature => Item?.Temperature ?? Consumable.Entity.MaxTemp;

    public float3 Direction
    {
        get
        {
            if(Item != null)
            {
                var hardpoint = Entity.Hardpoints[Item.Position.x, Item.Position.y];
                if (hardpoint != null && Entity.HardpointTransforms.ContainsKey(hardpoint))
                {
                    return normalize(Entity.HardpointTransforms[hardpoint].direction);
                }
                else
                {
                    var itemDirection = Entity.Direction.Rotate(Item.EquippableItem.Rotation);
                    return float3(itemDirection.x, 0, itemDirection.y);
                }
            }

            return float3(Entity.Direction.x, 0, Entity.Direction.y);
        }
    }

    protected Behavior(BehaviorData data, EquippedItem item)
    {
        Data = data;
        Item = item;
        ItemManager = Item.ItemManager;
    }

    protected Behavior(BehaviorData data, ConsumableItemEffect consumable)
    {
        Data = data;
        Consumable = consumable;
        ItemManager = consumable.Entity.ItemManager;
    }

    public float Evaluate(PerformanceStat stat) => Item?.Evaluate(stat) ?? Consumable.Evaluate(stat);
    protected void AddHeat(float heat) => Item?.AddHeat(heat); // TODO: Heat for Consumables

    protected void CauseDamage(float damage)
    {
        if (Item != null)
        {
            Item.EquippableItem.Durability -= damage;
            Entity.ItemDamage.OnNext((Item, damage));
        }
        else
        {
            Consumable.Entity.Hull.Durability -= damage;
            Consumable.Entity.HullDamage.OnNext(damage);
        }
    }

    protected void CauseWearDamage(float multiplier)
    {
        if (Item != null)
        {
            CauseDamage(Item.Wear * multiplier);
        }
    }

    public virtual bool Execute(float dt)
    {
        return true;
    }
}

public interface IActivatedBehavior
{
    void Activate();
    void Deactivate();
}

public interface IAnalogBehavior
{
    float Axis { get; set; }
}

public interface IEventBehavior
{
    void ResetEvents();
}

public interface IInitializableBehavior
{
    void Initialize();
}

public interface IInteractiveBehavior
{
    bool Exposed { get; }
}

public interface IAlwaysUpdatedBehavior
{
    void Update(float delta);
}

public interface IProgressBehavior
{
    float Progress { get; }
}

public interface IOrderedBehavior
{
    int Order { get; }
}

public interface IPersistentBehavior//<T> where T : IBehavior
{
    PersistentBehaviorData Store();
    void Restore(PersistentBehaviorData data);
}

public interface IPopulationAssignment
{
    int AssignedPopulation { get; set; }
}

[MessagePackObject]
public abstract class PersistentBehaviorData
{
}

[Inspectable,
 Union(0, typeof(GuidedWeaponData)),
 Union(1, typeof(LauncherData)),
 Union(2, typeof(ReactorData)),
 Union(3, typeof(RadiatorData)),
 Union(4, typeof(StatModifierData)),
 Union(5, typeof(SensorData)),
 Union(6, typeof(ReflectorData)),
 Union(7, typeof(ShieldData)),
 Union(8, typeof(ThrusterData)),
 Union(9, typeof(WearData)),
 Union(10, typeof(VelocityConversionData)),
 Union(11, typeof(VelocityLimitData)),
 Union(12, typeof(AetherDriveData)),
 // Union(14, typeof(TowingControllerData)),
 Union(15, typeof(CooldownData)),
 Union(16, typeof(HeatData)),
 // Union(17, typeof(HitscanData)),
 Union(18, typeof(ItemUsageData)),
 //Union(19, typeof(RadianceData)),
 Union(20, typeof(SwitchData)),
 Union(21, typeof(TriggerData)),
 Union(22, typeof(VisibilityData)),
 Union(23, typeof(ThermotoggleData)),
 Union(24, typeof(EnergyDrawData)),
 // Union(25, typeof(MiningControllerData)),
 Union(26, typeof(MiningToolData)),
 // Union(27, typeof(SurveyControllerData)),
 Union(28, typeof(ResourceScannerData)),
 // Union(29, typeof(WanderControllerData)),
 // Union(30, typeof(HaulingControllerData)),
 Union(31, typeof(CapacitorData)),
 Union(32, typeof(CockpitData)),
 Union(33, typeof(HeatStorageData)),
 Union(34, typeof(TurretControllerData)),
 Union(35, typeof(InstantWeaponData)),
 Union(36, typeof(ConstantWeaponData)),
 Union(37, typeof(ChargedWeaponData)),
 Union(38, typeof(AutoWeaponData))]
public abstract class BehaviorData
{
    [Inspectable, Key(0)]
    public int Group;

    public abstract Behavior CreateInstance(EquippedItem item);
    public abstract Behavior CreateInstance(ConsumableItemEffect consumable);

    public override string ToString()
    {
        return base.ToString().FormatTypeName();
    }
}