SecretPluginLaboratories/CustomClasses/BloodFueledManager.cs

using LabApi.Events.Handlers;
using LabApi.Features.Wrappers;
using MEC;
using PlayerRoles.FirstPersonControl;
using PlayerRoles.PlayableScps.Scp939;
using Logger = LabApi.Features.Console.Logger;
using Random = System.Random;

namespace CustomClasses;

public class DisableStaminaRegenEffect : CustomPlayerEffect, IStaminaModifier
{
    public bool StaminaModifierActive => IsEnabled;
    public float StaminaUsageMultiplier => 1;

    public float StaminaRegenMultiplier => 0;
    public bool SprintingDisabled => false;

    public override EffectClassification Classification => EffectClassification.Negative;
}

public class BloodFueledStaminaEffect : CustomPlayerEffect, IStaminaModifier
{
    public bool StaminaModifierActive => IsEnabled;
    public float StaminaUsageMultiplier => 0.2f;

    public float StaminaRegenMultiplier => 1;
    public bool SprintingDisabled => false;

    public override EffectClassification Classification => EffectClassification.Positive;
}

public class BloodFueledManager
{
    private readonly CustomClasses _plugin;
    
    public static bool IsBloodFueled(Player player)
    {
        try
        {
            return player.CustomInfo.Contains("Blood Fueled");
        }
        catch
        {
            return false;
        }
    }

    public BloodFueledManager(CustomClasses plugin)
    {
        _plugin = plugin;
        PlayerEvents.Hurt += ev =>
        {
            if (ev.DamageHandler is not Scp939DamageHandler damageHandler) return;
            var attacker = Player.Get(damageHandler.Attacker.Hub);
            if (attacker == null) return;
            if (!IsBloodFueled(attacker)) return;

            
            if (ev.Player.Health <= 0)
            {
                attacker.Heal(25);
                attacker.StaminaRemaining += 0.2f;
                return;
            }
            
            attacker.Heal(15);
            attacker.StaminaRemaining += 0.1f;
        };

        Timing.RunCoroutine(DrainBlood());
    }

    public static IEnumerator<float> DrainBlood()
    {
        while (true)
        {
            yield return Timing.WaitForSeconds(1);
            foreach (var player in Player.ReadyList.Where(IsBloodFueled))
            {
                if (player.StaminaRemaining <= 0f)
                {
                    player.Health = Math.Min(Math.Max(player.Health - 50, 500), player.Health);
                    continue;
                }
                
                player.StaminaRemaining -= 0.005f;

                if (player.MaxHealth <= player.Health) continue;
                player.Heal(5);
                player.StaminaRemaining -= 0.001f;
            }
        }
        // ReSharper disable once IteratorNeverReturns
    }
}

public class BloodFueledHandler : CustomClassHandler
{
    public override void HandleSpawn(Player player, CustomClassConfig config, Random random)
    {
        player.SendBroadcast("You are the <color=#6e2e99>Blood Fueled</color>!", CustomClasses.BroadcastDuration);
        const string customInfo = "<color=#A0A0A0>Blood Fueled</color>";
        if (!Player.ValidateCustomInfo(customInfo, out var reason))
        {
            Logger.Error($"Invalid custom info for Blood Fueled: {reason}");
        }
        else
        {
            player.CustomInfo = customInfo;
            player.InfoArea |= PlayerInfoArea.CustomInfo;
        }

        player.MaxHumeShield = 0;
        player.HumeShield = 0;
        player.MaxHealth = 3500;
        player.Health = 3500;
        
        player.EnableEffect<DisableStaminaRegenEffect>(1, float.PositiveInfinity);
        player.EnableEffect<BloodFueledStaminaEffect>(1, float.PositiveInfinity);
    }
}