using System.Linq;
using Content.Server.Station.Systems;
using JetBrains.Annotations;
using Robust.Shared.Random;

namespace Content.Server.StationEvents.Events;

[UsedImplicitly]
public sealed class BureaucraticError : StationEventSystem
{
    [Dependency] private readonly StationJobsSystem _stationJobs = default!;

    public override string Prototype => "BureaucraticError";

    public override void Started()
    {
        base.Started();

        if (StationSystem.Stations.Count == 0) return; // No stations
        var chosenStation = RobustRandom.Pick(StationSystem.Stations.ToList());
        var jobList = _stationJobs.GetJobs(chosenStation).Keys.ToList();

        // Low chance to completely change up the late-join landscape by closing all positions except infinite slots.
        // Lower chance than the /tg/ equivalent of this event.
        if (RobustRandom.Prob(0.25f))
        {
            var chosenJob = RobustRandom.PickAndTake(jobList);
            _stationJobs.MakeJobUnlimited(chosenStation, chosenJob); // INFINITE chaos.
            foreach (var job in jobList)
            {
                if (_stationJobs.IsJobUnlimited(chosenStation, job))
                    continue;
                _stationJobs.TrySetJobSlot(chosenStation, job, 0);
            }
        }
        else
        {
            // Changing every role is maybe a bit too chaotic so instead change 20-30% of them.
            for (var i = 0; i < RobustRandom.Next((int)(jobList.Count * 0.20), (int)(jobList.Count * 0.30)); i++)
            {
                var chosenJob = RobustRandom.PickAndTake(jobList);
                if (_stationJobs.IsJobUnlimited(chosenStation, chosenJob))
                    continue;

                _stationJobs.TryAdjustJobSlot(chosenStation, chosenJob, RobustRandom.Next(-3, 6));
            }
        }
    }
}