using Content.Server.Chat.Managers; // DeltaV
using Content.Server._DV.StationEvents.NextEvent; // DeltaV
using Content.Server.GameTicking;
using Content.Server.GameTicking.Rules;
using Content.Server.StationEvents.Components;
using Content.Shared.GameTicking.Components;
using Robust.Shared.Random;
using Robust.Shared.Timing; // DeltaV

namespace Content.Server.StationEvents;

public sealed class RampingStationEventSchedulerSystem : GameRuleSystem<RampingStationEventSchedulerComponent>
{
    [Dependency] private readonly IChatManager _chatManager = default!; // DeltaV
    [Dependency] private readonly IGameTiming _timing = default!; // DeltaV
    [Dependency] private readonly IRobustRandom _random = default!;
    [Dependency] private readonly EventManagerSystem _event = default!;
    [Dependency] private readonly GameTicker _gameTicker = default!;
    [Dependency] private readonly NextEventSystem _next = default!; // DeltaV

    /* DeltaV
    /// <summary>
    /// Returns the ChaosModifier which increases as round time increases to a point.
    /// </summary>
    public float GetChaosModifier(EntityUid uid, RampingStationEventSchedulerComponent component)
    {
        var roundTime = (float) _gameTicker.RoundDuration().TotalSeconds;
        if (roundTime > component.EndTime)
            return component.MaxChaos;

        return component.MaxChaos / component.EndTime * roundTime + component.StartingChaos;
    }
    */

    protected override void Started(EntityUid uid, RampingStationEventSchedulerComponent component, GameRuleComponent gameRule, GameRuleStartedEvent args)
    {
        base.Started(uid, component, gameRule, args);

        /* DeltaV
        // Worlds shittiest probability distribution
        // Got a complaint? Send them to
        component.MaxChaos = _random.NextFloat(component.AverageChaos, component.AverageChaos + component.AverageChaos / 4); // DeltaV - Survival starts a bit faster but ends the same
        // This is in minutes, so *60 for seconds (for the chaos calc)
        component.EndTime = _random.NextFloat(component.AverageEndTime - component.AverageEndTime / 4, component.AverageEndTime + component.AverageEndTime / 4) * 60f;
        component.StartingChaos = component.MaxChaos / 10;
        */

        PickNextEventTime(uid, component);

        // Begin DeltaV Additions: init NextEventComp
        if (TryComp<NextEventComponent>(uid, out var nextEventComponent)
            && _event.TryGenerateRandomEvent(component.ScheduledGameRules, TimeSpan.FromSeconds(component.TimeUntilNextEvent)) is {} firstEvent)
        {
            _chatManager.SendAdminAlert(Loc.GetString("station-event-system-run-event-delayed", ("eventName", firstEvent), ("seconds", (int)component.TimeUntilNextEvent)));
            _next.UpdateNextEvent(nextEventComponent, firstEvent, GameTicker.RoundDuration() + TimeSpan.FromSeconds(component.TimeUntilNextEvent));
        }
        // End DeltaV Additions: init NextEventComp
    }

    public override void Update(float frameTime)
    {
        base.Update(frameTime);

        if (!_event.EventsEnabled)
            return;

        var query = EntityQueryEnumerator<RampingStationEventSchedulerComponent, GameRuleComponent>();
        while (query.MoveNext(out var uid, out var scheduler, out var gameRule))
        {
            if (!GameTicker.IsGameRuleActive(uid, gameRule))
                continue;

            if (scheduler.TimeUntilNextEvent > 0f)
            {
                scheduler.TimeUntilNextEvent -= frameTime;
                continue;
            }

            // Begin DeltaV Additions: events using NextEventComponent
            if (TryComp<NextEventComponent>(uid, out var nextEventComponent)) // If there is a nextEventComponent use the stashed event instead of running it directly.
            {
                PickNextEventTime(uid, scheduler);
                var nextEventTime = GameTicker.RoundDuration() + TimeSpan.FromSeconds(scheduler.TimeUntilNextEvent);
                if (_event.TryGenerateRandomEvent(scheduler.ScheduledGameRules, nextEventTime) is not {} generatedEvent)
                    continue;

                _chatManager.SendAdminAlert(Loc.GetString("station-event-system-run-event-delayed", ("eventName", generatedEvent), ("seconds", (int)scheduler.TimeUntilNextEvent)));
                // Cycle the stashed event with the new generated event and time.
                string? storedEvent = _next.UpdateNextEvent(nextEventComponent, generatedEvent, nextEventTime);
                if (string.IsNullOrEmpty(storedEvent)) //If there was no stored event don't try to run it.
                    continue;

                GameTicker.AddGameRule(storedEvent);
                continue;
            }
            // End DeltaV Additions: events using NextEventComponent

            PickNextEventTime(uid, scheduler);
            _event.RunRandomEvent(scheduler.ScheduledGameRules);
        }
    }

    /// <summary>
    /// Sets the timing of the next event addition.
    /// </summary>
    private void PickNextEventTime(EntityUid uid, RampingStationEventSchedulerComponent component)
    {
        /* DeltaV
        var mod = GetChaosModifier(uid, component);

        // 4-12 minutes baseline. Will get faster over time as the chaos mod increases.
        component.TimeUntilNextEvent = _random.NextFloat(240f / mod, 720f / mod);
        */

        // Begin DeltaV Additions
        var averageTimeUntilNextEvent = component.TimeKeyPoints[0].Y;
        var timeUntilNextEventDeviation = _random.NextFloat(-1f, 1f) * component.TimeDeviation;
        var roundTime = (float)_gameTicker.RoundDuration().TotalMinutes;
        var absoluteTimePoint = 0f;

        foreach (var point in component.TimeKeyPoints)
        {
            absoluteTimePoint += point.X;
            if (roundTime >= absoluteTimePoint)
                averageTimeUntilNextEvent = point.Y;
        }

        component.TimeUntilNextEvent = (averageTimeUntilNextEvent + timeUntilNextEventDeviation) * 60;
        // End DeltaV Additions
    }
}