using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using static Unity.Mathematics.math;
using Random = Unity.Mathematics.Random;

public class AgentController
{
    public Entity Entity { get; }
    public EntityAgent EntityAgent { get; }
    public GameContext Context { get; }
    public Guid Zone { get; set; }

    public Guid HomeZone;

    private Locomotion _locomotion;
    private VelocityMatch _velocityMatch;
    private Random _random = new Random((uint) (DateTime.Now.Ticks%uint.MaxValue));
    private Guid _targetOrbit;

    public AgentController(GameContext context, Guid zone, Entity entity)
    {
        Entity = entity;
        Zone = zone;
        Context = context;
        EntityAgent = new EntityAgent(context, zone, entity);
        _locomotion = new Locomotion(entity);
        _velocityMatch = new VelocityMatch(context, entity);
        _velocityMatch.OnMatch += () =>
        {
            EntityAgent.CurrentBehavior = _locomotion;
            RandomTarget();
        };
        EntityAgent.CurrentBehavior = _locomotion;
        RandomTarget();
    }

    public void Update(float delta)
    {
        EntityAgent.Update(delta);
        // Context.Log(
        //     $"Agent Mode: {EntityAgent.CurrentBehavior.GetType()} " +
        //     $"Agent Distance: {distance} " +
        //     $"Turnaround Distance: {_stoppingDistance + _turnaroundDistance} " +
        //     $"Objective: {_objective.Key.ID.ToString().Substring(0, 8)}");

        if (EntityAgent.CurrentBehavior == _locomotion)
        {
            var orbitData = Context.Cache.Get<OrbitData>(_targetOrbit);
            _velocityMatch.TargetOrbit = _targetOrbit;
            var matchDistanceTime = _velocityMatch.MatchDistanceTime;
            _locomotion.Objective = Context.GetOrbitPosition(_targetOrbit) + Context.GetOrbitVelocity(_targetOrbit) * matchDistanceTime.y;
            var distance = length(_locomotion.Objective - Entity.Position);
            if (distance < matchDistanceTime.x)
                EntityAgent.CurrentBehavior = _velocityMatch;
        }
    }

    private void RandomTarget()
    {
        var entities = Context.ZonePlanets[Zone];
        _targetOrbit = Context.Cache.Get<PlanetData>(entities[_random.NextInt(entities.Length)]).Orbit;
    }
}