using UnityEngine;

namespace DanieleMarotta.RiversongCodeShowcase
{
    [RequiresWorldReadyForUpdate]
    public class DemoSystem : GameSystem, IUpdatable
    {
        [InjectService]
        private ISignalBus _signalBus;

        [InjectService]
        private GameConfig _config;

        [InjectService]
        private World _world;

        private bool _demoCompleted;

        private float _gameTime;

        public DemoSystem(IServiceLocator serviceLocator) : base(serviceLocator)
        {
        }

        public void Update()
        {
            if (_demoCompleted) return;

            _gameTime += Time.unscaledDeltaTime;

            var populationState = _world.PopulationState;
            var generalSettings = _config.GeneralSettings;

            if (populationState.Population < generalSettings.PopulationGoal || populationState.Happiness < generalSettings.HappinessGoal) return;

            _demoCompleted = true;

            _signalBus.Raise(new DemoCompletedSignal(_gameTime));
        }
    }
}