// SPDX-FileCopyrightText: 2025 Aiden <28298836+Aidenkrz@users.noreply.github.com>
// SPDX-FileCopyrightText: 2025 Aviu00 <93730715+Aviu00@users.noreply.github.com>
// SPDX-FileCopyrightText: 2025 Misandry <mary@thughunt.ing>
// SPDX-FileCopyrightText: 2025 gus <august.eymann@gmail.com>
//
// SPDX-License-Identifier: AGPL-3.0-or-later

using Content.Server.Body.Components;
using Content.Server.Body.Systems;
using Content.Server.Fluids.EntitySystems;
using Content.Server.Popups;
using Content.Shared._Shitcode.Wizard.Projectiles;
using Content.Shared._Shitcode.Wizard.SanguineStrike;
using Content.Shared.Chemistry.Components;
using Content.Shared.Chemistry.Components.SolutionManager;
using Content.Shared.Chemistry.EntitySystems;
using Content.Shared.FixedPoint;
using Robust.Server.Audio;
using Robust.Server.GameObjects;
using Robust.Shared.Map;
using Robust.Shared.Prototypes;

namespace Content.Server._Shitcode.Wizard.Systems;

public sealed class SanguineStrikeSystem : SharedSanguineStrikeSystem
{
    [Dependency] private readonly PopupSystem _popup = default!;
    [Dependency] private readonly PointLightSystem _light = default!;
    [Dependency] private readonly TransformSystem _transform = default!;
    [Dependency] private readonly AudioSystem _audio = default!;
    [Dependency] private readonly BloodstreamSystem _bloodStream = default!;
    [Dependency] private readonly SharedSolutionContainerSystem _solution = default!;
    [Dependency] private readonly PuddleSystem _puddle = default!;
    [Dependency] private readonly IPrototypeManager _proto = default!;

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

        SubscribeLocalEvent<SanguineStrikeComponent, ComponentInit>(OnInit);
        SubscribeLocalEvent<SanguineStrikeComponent, ComponentRemove>(OnRemove);
    }

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

        var query = EntityQueryEnumerator<SanguineStrikeComponent>();
        while (query.MoveNext(out var uid, out var sanguine))
        {
            sanguine.Lifetime -= frameTime;

            if (sanguine.Lifetime <= 0)
                RemCompDeferred(uid, sanguine);
        }
    }

    private void OnRemove(Entity<SanguineStrikeComponent> ent, ref ComponentRemove args)
    {
        var (uid, comp) = ent;

        if (TerminatingOrDeleted(uid))
            return;

        _popup.PopupEntity(Loc.GetString("sanguine-strike-end", ("item", uid)), uid);

        if (comp.HadPointLight)
            return;

        RemComp<PointLightComponent>(uid);
    }

    private void OnInit(Entity<SanguineStrikeComponent> ent, ref ComponentInit args)
    {
        var (uid, comp) = ent;

        if (HasComp<PointLightComponent>(uid))
        {
            comp.HadPointLight = true;
            return;
        }

        var light = _light.EnsureLight(uid);
        _light.SetRadius(uid, comp.LightRadius, light);
        _light.SetEnergy(uid, comp.LightEnergy, light);
        _light.SetColor(uid, comp.Color, light);
    }

    public override void ParticleEffects(EntityUid user, IReadOnlyList<EntityUid> targets, EntProtoId particle)
    {
        base.ParticleEffects(user, targets, particle);

        var xform = Transform(user);

        var trailQuery = GetEntityQuery<TrailComponent>();
        foreach (var target in targets)
        {
            var ent = Spawn(particle, xform.Coordinates);
            _transform.SetParent(ent, Transform(ent), user, xform);

            if (!trailQuery.TryComp(ent, out var comp))
                continue;

            comp.SpawnEntityPosition = target;
            Dirty(ent, comp);
        }
    }

    public override void BloodSteal(EntityUid user,
        IReadOnlyList<EntityUid> hitEntities,
        FixedPoint2 bloodStealAmount,
        EntityCoordinates? bloodSpillCoordinates)
    {
        base.BloodSteal(user, hitEntities, bloodStealAmount, bloodSpillCoordinates);

        var bloodQuery = GetEntityQuery<BloodstreamComponent>();
        var solutionQuery = GetEntityQuery<SolutionContainerManagerComponent>();

        // I love solutions :)
        if (!bloodQuery.TryComp(user, out var userBlood) || !solutionQuery.TryComp(user, out var userSolution) ||
            !_solution.ResolveSolution((user, userSolution), userBlood.BloodSolutionName, ref userBlood.BloodSolution))
            return;

        List<Entity<BloodstreamComponent, SolutionContainerManagerComponent>> bloodEntities = new();
        foreach (var hitEnt in hitEntities)
        {
            if (bloodQuery.TryComp(hitEnt, out var hitBlood) && solutionQuery.TryComp(hitEnt, out var hitSolution))
                bloodEntities.Add((hitEnt, hitBlood, hitSolution));
        }

        if (bloodEntities.Count == 0)
            return;

        Solution tempSol = new();
        var missingBlood = userBlood.BloodMaxVolume - userBlood.BloodSolution.Value.Comp.Solution.Volume;
        missingBlood = FixedPoint2.Max(FixedPoint2.Zero, missingBlood);
        var bloodSuckAmount = bloodStealAmount / bloodEntities.Count;
        foreach (var (entity, blood, solution) in bloodEntities)
        {
            if (!_solution.ResolveSolution((entity, solution),
                    blood.BloodSolutionName,
                    ref blood.BloodSolution))
                continue;

            var bloodToRemove = FixedPoint2.Min(blood.BloodSolution.Value.Comp.Solution.Volume,
                bloodSuckAmount);
            tempSol.MaxVolume += bloodToRemove;
            tempSol.AddSolution(_solution.SplitSolution(blood.BloodSolution.Value, bloodToRemove), _proto);
        }

        var restoredBlood = FixedPoint2.Min(tempSol.Volume, missingBlood);
        _bloodStream.TryModifyBloodLevel(user, restoredBlood, userBlood);
        _bloodStream.TryModifyBleedAmount(user, -userBlood.BleedAmount, userBlood);
        if (restoredBlood >= tempSol.Volume || tempSol.Volume <= 0 || tempSol.Contents.Count <= 0)
            return;

        var toRemove = restoredBlood / tempSol.Volume;
        for (var i = tempSol.Contents.Count - 1; i >= 0; i--)
        {
            tempSol.RemoveReagent(tempSol.Contents[i].Reagent,
                tempSol.Contents[i].Quantity * toRemove,
                true,
                true);
        }

        if (bloodSpillCoordinates != null)
            _puddle.TrySpillAt(bloodSpillCoordinates.Value, tempSol, out _);
    }

    protected override void Hit(EntityUid uid,
        SanguineStrikeComponent component,
        EntityUid user,
        IReadOnlyList<EntityUid> hitEntities)
    {
        base.Hit(uid, component, user, hitEntities);

        var xform = Transform(uid);

        BloodSteal(user, hitEntities, component.BloodSuckAmount, xform.Coordinates);

        _audio.PlayPvs(component.LifestealSound, xform.Coordinates);

        Spawn(component.Effect, _transform.GetMapCoordinates(xform));

        ParticleEffects(user, hitEntities, component.BloodEffect);

        RemCompDeferred(uid, component);
    }
}