using System.Collections.Frozen;
using SPTarkov.Server.Core.Constants;
using SPTarkov.DI.Annotations;
using SPTarkov.Server.Core.Context;
using SPTarkov.Server.Core.DI;
using SPTarkov.Server.Core.Models.Eft.Common.Tables;
using SPTarkov.Server.Core.Models.Eft.Match;
using SPTarkov.Server.Core.Models.Enums;
using SPTarkov.Server.Core.Models.Spt.Bots;
using SPTarkov.Server.Core.Models.Spt.Config;
using SPTarkov.Server.Core.Models.Utils;
using SPTarkov.Server.Core.Servers;
using SPTarkov.Server.Core.Services;
using SPTarkov.Server.Core.Utils;
using LogLevel = SPTarkov.Server.Core.Models.Spt.Logging.LogLevel;

namespace SPTarkov.Server.Core.Helpers;

[Injectable(InjectionType.Singleton)]
public class BotGeneratorHelper(
    ISptLogger<BotGeneratorHelper> _logger,
    RandomUtil _randomUtil,
    DurabilityLimitsHelper _durabilityLimitsHelper,
    ItemHelper _itemHelper,
    InventoryHelper _inventoryHelper,
    ContainerHelper _containerHelper,
    ApplicationContext _applicationContext,
    LocalisationService _localisationService,
    ConfigServer _configServer
    ) : IOnLoad
{
    // Equipment slot ids that do not conflict with other slots
    private static readonly FrozenSet<string> _slotsWithNoCompatIssues = [
        EquipmentSlots.Scabbard.ToString(),
        EquipmentSlots.Backpack.ToString(),
        EquipmentSlots.SecuredContainer.ToString(),
        EquipmentSlots.Holster.ToString(),
        EquipmentSlots.ArmBand.ToString()
    ];

    private BotConfig _botConfig;
    private string[] _pmcTypes;

    public Task OnLoad()
    {
        _botConfig = _configServer.GetConfig<BotConfig>();
        var pmcConfig = _configServer.GetConfig<PmcConfig>();
        _pmcTypes = [pmcConfig.UsecType.ToLower(), pmcConfig.BearType.ToLower()];
        return Task.CompletedTask;
    }

    public string GetRoute()
    {
        return "spt-botGeneratorHelper";
    }

    /// <summary>
    ///     Adds properties to an item
    ///     e.g. Repairable / HasHinge / Foldable / MaxDurability
    /// </summary>
    /// <param name="itemTemplate">Item extra properties are being generated for</param>
    /// <param name="botRole">Used by weapons to randomize the durability values. Null for non-equipped items</param>
    /// <returns>Item Upd object with extra properties</returns>
    public Upd GenerateExtraPropertiesForItem(TemplateItem? itemTemplate, string? botRole = null)
    {
        // Get raid settings, if no raid, default to day
        var raidSettings = _applicationContext
            .GetLatestValue(ContextVariableType.RAID_CONFIGURATION)
            ?.GetValue<GetRaidConfigurationRequestData>();

        RandomisedResourceDetails randomisationSettings = null;
        if (botRole is not null)
        {
            _botConfig.LootItemResourceRandomization.TryGetValue(botRole, out randomisationSettings);
        }


        Upd itemProperties = new();
        var hasProperties = false;

        if (itemTemplate?.Properties?.MaxDurability is not null && itemTemplate.Properties.MaxDurability > 0)
        {
            if (itemTemplate.Properties.WeapClass is not null)
            {
                // Is weapon
                itemProperties.Repairable = GenerateWeaponRepairableProperties(itemTemplate, botRole);
                hasProperties = true;
            }
            else if (itemTemplate.Properties.ArmorClass is not null)
            {
                // Is armor
                itemProperties.Repairable = GenerateArmorRepairableProperties(itemTemplate, botRole);
                hasProperties = true;
            }
        }

        if (itemTemplate?.Properties?.HasHinge ?? false)
        {
            itemProperties.Togglable = new UpdTogglable
            {
                On = true
            };
            hasProperties = true;
        }

        if (itemTemplate?.Properties?.Foldable ?? false)
        {
            itemProperties.Foldable = new UpdFoldable
            {
                Folded = false
            };
            hasProperties = true;
        }

        if (itemTemplate?.Properties?.WeapFireType?.Count == 0)
        {
            itemProperties.FireMode = itemTemplate.Properties.WeapFireType.Contains("fullauto")
                ? new UpdFireMode
                {
                    FireMode = "fullauto"
                }
                : new UpdFireMode
                {
                    FireMode = _randomUtil.GetArrayValue(itemTemplate.Properties.WeapFireType)
                };
            hasProperties = true;
        }

        if (itemTemplate?.Properties?.MaxHpResource is not null)
        {
            itemProperties.MedKit = new UpdMedKit
            {
                HpResource = GetRandomizedResourceValue(
                    itemTemplate.Properties.MaxHpResource ?? 0,
                    randomisationSettings?.Meds
                )
            };
            hasProperties = true;
        }

        if (itemTemplate?.Properties?.MaxResource is not null && itemTemplate.Properties?.FoodUseTime is not null)
        {
            itemProperties.FoodDrink = new UpdFoodDrink
            {
                HpPercent = GetRandomizedResourceValue(
                    itemTemplate.Properties.MaxResource ?? 0,
                    randomisationSettings?.Food
                )
            };
            hasProperties = true;
        }

        if (itemTemplate?.Parent == BaseClasses.FLASHLIGHT)
        {
            // Get chance from botconfig for bot type
            var lightLaserActiveChance = raidSettings.IsNightRaid
                ? GetBotEquipmentSettingFromConfig(botRole, "lightIsActiveNightChancePercent", 50)
                : GetBotEquipmentSettingFromConfig(botRole, "lightIsActiveDayChancePercent", 25);
            itemProperties.Light = new UpdLight
            {
                IsActive = _randomUtil.GetChance100(lightLaserActiveChance),
                SelectedMode = 0
            };
            hasProperties = true;
        }
        else if (itemTemplate?.Parent == BaseClasses.TACTICAL_COMBO)
        {
            // Get chance from botconfig for bot type, use 50% if no value found
            var lightLaserActiveChance = GetBotEquipmentSettingFromConfig(
                botRole,
                "laserIsActiveChancePercent",
                50
            );
            itemProperties.Light = new UpdLight
            {
                IsActive = _randomUtil.GetChance100(lightLaserActiveChance),
                SelectedMode = 0
            };
            hasProperties = true;
        }

        if (itemTemplate?.Parent == BaseClasses.NIGHTVISION)
        {
            // Get chance from botconfig for bot type
            var nvgActiveChance = raidSettings.IsNightRaid
                ? GetBotEquipmentSettingFromConfig(botRole, "nvgIsActiveChanceNightPercent", 90)
                : GetBotEquipmentSettingFromConfig(botRole, "nvgIsActiveChanceDayPercent", 15);
            itemProperties.Togglable = new UpdTogglable
            {
                On = _randomUtil.GetChance100(nvgActiveChance)
            };
            hasProperties = true;
        }

        // Togglable face shield
        if ((itemTemplate?.Properties?.HasHinge ?? false) && (itemTemplate.Properties.FaceShieldComponent ?? false))
        {
            var faceShieldActiveChance = GetBotEquipmentSettingFromConfig(
                botRole,
                "faceShieldIsActiveChancePercent",
                75
            );
            itemProperties.Togglable = new UpdTogglable
            {
                On = _randomUtil.GetChance100(faceShieldActiveChance)
            };
            hasProperties = true;
        }

        // Get chance from botconfig for bot type, use 75% if no value found
        return hasProperties ? itemProperties : null;
    }

    /// <summary>
    ///     Randomize the HpResource for bots e.g (245/400 resources)
    /// </summary>
    /// <param name="maxResource">Max resource value of medical items</param>
    /// <param name="randomizationValues">Value provided from config</param>
    /// <returns>Randomized value from maxHpResource</returns>
    protected double GetRandomizedResourceValue(double maxResource, RandomisedResourceValues? randomizationValues)
    {
        if (randomizationValues is null)
        {
            return maxResource;
        }

        if (_randomUtil.GetChance100(randomizationValues.ChanceMaxResourcePercent))
        {
            return maxResource;
        }

        return _randomUtil.GetDouble(
            _randomUtil.GetPercentOfValue(randomizationValues.ResourcePercent, maxResource, 0),
            maxResource
        );
    }

    /// <summary>
    ///     Get the chance for the weapon attachment or helmet equipment to be set as activated
    /// </summary>
    /// <param name="botRole">role of bot with weapon/helmet</param>
    /// <param name="setting">the setting of the weapon attachment/helmet equipment to be activated</param>
    /// <param name="defaultValue">default value for the chance of activation if the botrole or bot equipment role is undefined</param>
    /// <returns>Percent chance to be active</returns>
    protected double? GetBotEquipmentSettingFromConfig(string? botRole, string setting, double defaultValue)
    {
        if (botRole is null)
        {
            return defaultValue;
        }

        var botEquipmentSettings = _botConfig.Equipment[GetBotEquipmentRole(botRole)];
        if (botEquipmentSettings is null)
        {
            _logger.Warning(
                _localisationService.GetText(
                    "bot-missing_equipment_settings",
                    new
                    {
                        botRole,
                        setting,
                        defaultValue
                    }
                )
            );

            return defaultValue;
        }

        var props = botEquipmentSettings.GetType().GetProperties();
        var propValue = (double?) props.FirstOrDefault(x => string.Equals(x.Name, setting, StringComparison.CurrentCultureIgnoreCase))
            ?.GetValue(botEquipmentSettings);

        if (propValue is not null)
        {
            return propValue;
        }

        _logger.Warning(
            _localisationService.GetText(
                "bot-missing_equipment_settings_property",
                new
                {
                    botRole,
                    setting,
                    defaultValue
                }
            )
        );

        return defaultValue;
    }

    /// <summary>
    ///     Create a repairable object for a weapon that containers durability + max durability properties
    /// </summary>
    /// <param name="itemTemplate">weapon object being generated for</param>
    /// <param name="botRole">type of bot being generated for</param>
    /// <returns>Repairable object</returns>
    protected UpdRepairable GenerateWeaponRepairableProperties(TemplateItem itemTemplate, string? botRole = null)
    {
        var maxDurability = _durabilityLimitsHelper.GetRandomizedMaxWeaponDurability(itemTemplate, botRole);
        var currentDurability = _durabilityLimitsHelper.GetRandomizedWeaponDurability(
            itemTemplate,
            botRole,
            maxDurability
        );

        return new UpdRepairable
        {
            Durability = Math.Round(currentDurability, 5),
            MaxDurability = Math.Round(maxDurability, 5)
        };
    }

    /// <summary>
    ///     Create a repairable object for an armor that containers durability + max durability properties
    /// </summary>
    /// <param name="itemTemplate">weapon object being generated for</param>
    /// <param name="botRole">type of bot being generated for</param>
    /// <returns>Repairable object</returns>
    protected UpdRepairable GenerateArmorRepairableProperties(TemplateItem itemTemplate, string? botRole = null)
    {
        double maxDurability;
        double currentDurability;
        if (itemTemplate.Properties?.ArmorClass == 0)
        {
            maxDurability = itemTemplate.Properties.MaxDurability.Value;
            currentDurability = itemTemplate.Properties.MaxDurability.Value;
        }
        else
        {
            maxDurability = _durabilityLimitsHelper.GetRandomizedMaxArmorDurability(itemTemplate, botRole);
            currentDurability = _durabilityLimitsHelper.GetRandomizedArmorDurability(
                itemTemplate,
                botRole,
                maxDurability
            );
        }

        return new UpdRepairable
        {
            Durability = Math.Round(currentDurability, 5),
            MaxDurability = Math.Round(maxDurability, 5)
        };
    }

    /// <summary>
    ///     Can item be added to another item without conflict
    /// </summary>
    /// <param name="itemsEquipped">Items to check compatibilities with</param>
    /// <param name="tplToCheck">Tpl of the item to check for incompatibilities</param>
    /// <param name="equipmentSlot">Slot the item will be placed into</param>
    /// <returns>false if no incompatibilities, also has incompatibility reason</returns>
    public ChooseRandomCompatibleModResult IsItemIncompatibleWithCurrentItems(List<Item> itemsEquipped, string tplToCheck, string equipmentSlot)
    {
        // Skip slots that have no incompatibilities
        if (_slotsWithNoCompatIssues.Contains(equipmentSlot))
        {
            return new ChooseRandomCompatibleModResult
            {
                Incompatible = false,
                Found = false,
                Reason = ""
            };
        }

        // TODO: Can probably be optimized to cache itemTemplates as items are added to inventory
        var equippedItemsDb = itemsEquipped.Select(equippedItem => _itemHelper.GetItem(equippedItem.Template).Value).ToList();
        var (key, itemToEquip) = _itemHelper.GetItem(tplToCheck);

        if (!key)
        {
            _logger.Warning(
                _localisationService.GetText(
                    "bot-invalid_item_compatibility_check",
                    new
                    {
                        itemTpl = tplToCheck,
                        slot = equipmentSlot
                    }
                )
            );

            return new ChooseRandomCompatibleModResult
            {
                Incompatible = true,
                Found = false,
                Reason = $"item: {tplToCheck} does not exist in the database"
            };
        }

        if (itemToEquip?.Properties is null)
        {
            _logger.Warning(
                _localisationService.GetText(
                    "bot-compatibility_check_missing_props",
                    new
                    {
                        id = itemToEquip?.Id,
                        name = itemToEquip?.Name,
                        slot = equipmentSlot
                    }
                )
            );

            return new ChooseRandomCompatibleModResult
            {
                Incompatible = true,
                Found = false,
                Reason = $"item: {tplToCheck} does not have a _props field"
            };
        }

        // Does an equipped item have a property that blocks the desired item - check for prop "BlocksX" .e.g BlocksEarpiece / BlocksFaceCover
        var templateItems = equippedItemsDb.ToList();
        var blockingItem = templateItems.FirstOrDefault(item => HasBlockingProperty(item, equipmentSlot));
        if (blockingItem is not null)
            // this.logger.warning(`1 incompatibility found between - {itemToEquip[1]._name} and {blockingItem._name} - {equipmentSlot}`);
        {
            return new ChooseRandomCompatibleModResult
            {
                Incompatible = true,
                Found = false,
                Reason = $"{tplToCheck} {itemToEquip.Name} in slot: {equipmentSlot} blocked by: {blockingItem.Id} {blockingItem.Name}",
                SlotBlocked = true
            };
        }

        // Check if any of the current inventory templates have the incoming item defined as incompatible
        blockingItem = templateItems.FirstOrDefault(x => x?.Properties?.ConflictingItems?.Contains(tplToCheck) ?? false);
        if (blockingItem is not null)
            // this.logger.warning(`2 incompatibility found between - {itemToEquip[1]._name} and {blockingItem._props.Name} - {equipmentSlot}`);
        {
            return new ChooseRandomCompatibleModResult
            {
                Incompatible = true,
                Found = false,
                Reason = $"{tplToCheck} {itemToEquip.Name} in slot: {equipmentSlot} blocked by: {blockingItem.Id} {blockingItem.Name}",
                SlotBlocked = true
            };
        }

        // Does item being checked get blocked/block existing item
        if (itemToEquip.Properties.BlocksHeadwear ?? false)
        {
            var existingHeadwear = itemsEquipped.FirstOrDefault(x => x.SlotId == Containers.Headwear);
            if (existingHeadwear is not null)
            {
                return new ChooseRandomCompatibleModResult
                {
                    Incompatible = true,
                    Found = false,
                    Reason = $"{tplToCheck} {itemToEquip.Name} is blocked by: {existingHeadwear.Template} in slot: {existingHeadwear.SlotId}",
                    SlotBlocked = true
                };
            }
        }

        // Does item being checked get blocked/block existing item
        if (itemToEquip.Properties.BlocksFaceCover.GetValueOrDefault(false))
        {
            var existingFaceCover = itemsEquipped.FirstOrDefault(item => item.SlotId == Containers.FaceCover);
            if (existingFaceCover is not null)
            {
                return new ChooseRandomCompatibleModResult
                {
                    Incompatible = true,
                    Found = false,
                    Reason = $"{tplToCheck} {itemToEquip.Name} is blocked by: {existingFaceCover.Template} in slot: {existingFaceCover.SlotId}",
                    SlotBlocked = true
                };
            }
        }

        // Does item being checked get blocked/block existing item
        if (itemToEquip.Properties.BlocksEarpiece.GetValueOrDefault(false))
        {
            var existingEarpiece = itemsEquipped.FirstOrDefault(item => item.SlotId == Containers.Earpiece);
            if (existingEarpiece is not null)
            {
                return new ChooseRandomCompatibleModResult
                {
                    Incompatible = true,
                    Found = false,
                    Reason = $"{tplToCheck} {itemToEquip.Name} is blocked by: {existingEarpiece.Template} in slot: {existingEarpiece.SlotId}",
                    SlotBlocked = true
                };
            }
        }

        // Does item being checked get blocked/block existing item
        if (itemToEquip.Properties.BlocksArmorVest.GetValueOrDefault(false))
        {
            var existingArmorVest = itemsEquipped.FirstOrDefault(item => item.SlotId == Containers.ArmorVest);
            if (existingArmorVest is not null)
            {
                return new ChooseRandomCompatibleModResult
                {
                    Incompatible = true,
                    Found = false,
                    Reason = $"{tplToCheck} {itemToEquip.Name} is blocked by: {existingArmorVest.Template} in slot: {existingArmorVest.SlotId}",
                    SlotBlocked = true
                };
            }
        }

        // Check if the incoming item has any inventory items defined as incompatible
        var blockingInventoryItem = itemsEquipped.FirstOrDefault(x => itemToEquip.Properties.ConflictingItems?.Contains(x.Template) ?? false);
        if (blockingInventoryItem is not null)
            // this.logger.warning(`3 incompatibility found between - {itemToEquip[1]._name} and {blockingInventoryItem._tpl} - {equipmentSlot}`)
        {
            return new ChooseRandomCompatibleModResult
            {
                Incompatible = true,
                Found = false,
                Reason = $"{tplToCheck} blocks existing item {blockingInventoryItem.Template} in slot {blockingInventoryItem.SlotId}"
            };
        }

        return new ChooseRandomCompatibleModResult
        {
            Incompatible = false,
            Reason = ""
        };
    }

    protected bool HasBlockingProperty(TemplateItem? item, string blockingPropertyName)
    {
        return item != null && item.Blocks.TryGetValue(blockingPropertyName, out var blocks) && blocks;
    }

    /// <summary>
    ///     Convert a bots role to the equipment role used in config/bot.json
    /// </summary>
    /// <param name="botRole">Role to convert</param>
    /// <returns>Equipment role (e.g. pmc / assault / bossTagilla)</returns>
    public string GetBotEquipmentRole(string botRole)
    {
        return _pmcTypes.Contains(botRole, StringComparer.OrdinalIgnoreCase)
            ? Sides.PmcEquipmentRole
            : botRole;
    }

    /// <summary>
    ///     Adds an item with all its children into specified equipmentSlots, wherever it fits.
    /// </summary>
    /// <param name="equipmentSlots">Slot to add item+children into</param>
    /// <param name="rootItemId">Root item id to use as mod items parentId</param>
    /// <param name="rootItemTplId">Root itms tpl id</param>
    /// <param name="itemWithChildren">Item to add</param>
    /// <param name="inventory">Inventory to add item+children into</param>
    /// <param name="containersIdFull"></param>
    /// <returns>ItemAddedResult result object</returns>
    public ItemAddedResult AddItemWithChildrenToEquipmentSlot(
        HashSet<EquipmentSlots> equipmentSlots,
        string rootItemId,
        string? rootItemTplId,
        List<Item> itemWithChildren,
        BotBaseInventory inventory,
        HashSet<string>? containersIdFull = null)
    {
        // Track how many containers are unable to be found
        var missingContainerCount = 0;
        foreach (var equipmentSlotId in equipmentSlots)
        {
            if (containersIdFull?.Contains(equipmentSlotId.ToString()) ?? false)
            {
                continue;
            }

            // Get container to put item into
            var container = inventory.Items.FirstOrDefault(item => item.SlotId == equipmentSlotId.ToString());
            if (container is null)
            {
                missingContainerCount++;
                if (missingContainerCount == equipmentSlots.Count)
                {
                    // Bot doesn't have any containers we want to add item to
                    if (_logger.IsLogEnabled(LogLevel.Debug))
                    {
                        _logger.Debug(
                            $"Unable to add item: {itemWithChildren.FirstOrDefault()?.Template} to bot as it lacks the following containers: {string.Join(",", equipmentSlots)}"
                        );
                    }

                    return ItemAddedResult.NO_CONTAINERS;
                }

                // No container of desired type found, skip to next container type
                continue;
            }

            // Get container details from db
            var (key, value) = _itemHelper.GetItem(container.Template);
            if (!key)
            {
                _logger.Warning(_localisationService.GetText("bot-missing_container_with_tpl", container.Template));

                // Bad item, skip
                continue;
            }

            if (value?.Properties?.Grids?.Count == 0)
                // Container has no slots to hold items
            {
                continue;
            }

            // Get x/y grid size of item
            var itemSize = _inventoryHelper.GetItemSize(rootItemTplId, rootItemId, itemWithChildren);

            // Iterate over each grid in the container and look for a big enough space for the item to be placed in
            var currentGridCount = 1;
            var totalSlotGridCount = value?.Properties?.Grids?.Count;
            foreach (var slotGrid in value?.Properties?.Grids ?? [])
            {
                // Grid is empty, skip or item size is bigger than grid
                if (slotGrid.Props?.CellsH == 0 ||
                    slotGrid.Props?.CellsV == 0 ||
                    itemSize[0] * itemSize[1] > slotGrid.Props?.CellsV * slotGrid.Props?.CellsH)
                {
                    continue;
                }

                // Can't put item type in grid, skip all grids as we're assuming they have the same rules
                if (!ItemAllowedInContainer(slotGrid, rootItemTplId))
                    // Multiple containers, maybe next one allows item, only break out of loop for the containers grids
                {
                    break;
                }

                // Get all root items in found container
                var existingContainerItems = (inventory.Items ?? []).Where(item => item.ParentId == container.Id && item.SlotId == slotGrid.Name
                );

                // Get root items in container we can iterate over to find out what space is free
                var containerItemsToCheck = existingContainerItems.Where(x => x.SlotId == slotGrid.Name);
                var containerItemsWithChildren = GetContainerItemsWithChildren(containerItemsToCheck, inventory.Items);

                if (slotGrid.Props is not null)
                {
                    // Get rid of an items free/used spots in current grid
                    var slotGridMap = _inventoryHelper.GetContainerMap(
                        slotGrid.Props.CellsH.GetValueOrDefault(),
                        slotGrid.Props.CellsV.GetValueOrDefault(),
                        containerItemsWithChildren,
                        container.Id
                    );

                    // Try to fit item into grid
                    var findSlotResult = _containerHelper.FindSlotForItem(slotGridMap, itemSize[0], itemSize[1]);

                    // Free slot found, add item
                    if (findSlotResult.Success ?? false)
                    {
                        var parentItem = itemWithChildren.FirstOrDefault(i => i.Id == rootItemId);

                        // Set items parent to container id
                        if (parentItem is not null)
                        {
                            parentItem.ParentId = container.Id;
                            parentItem.SlotId = slotGrid.Name;
                            parentItem.Location = new ItemLocation
                                {
                                    X = findSlotResult.X,
                                    Y = findSlotResult.Y,
                                    R = findSlotResult.Rotation ?? false ? ItemRotation.Vertical : ItemRotation.Horizontal
                                }
                                ;
                        }

                        (inventory.Items ?? []).AddRange(itemWithChildren);

                        return ItemAddedResult.SUCCESS;
                    }
                }

                // If we've checked all grids in container and reached this point, there's no space for item
                if (currentGridCount >= totalSlotGridCount)
                {
                    break;
                }

                currentGridCount++;
                // No space in this grid, move to next container grid and try again
            }

            // if we got to this point, the item couldn't be placed on the container
            if (containersIdFull is null)
            {
                continue;
            }

            // if the item was a one by one, we know it must be full. Or if the maps cant find a slot for a one by one
            if (itemSize[0] == 1 && itemSize[1] == 1)
            {
                containersIdFull.Add(equipmentSlotId.ToString());
            }
        }

        return ItemAddedResult.NO_SPACE;
    }

    /// <summary>
    ///     Take a list of items and check if they need children + add them
    /// </summary>
    /// <param name="containerRootItems"></param>
    /// <param name="inventoryItems"></param>
    /// <returns></returns>
    protected List<Item> GetContainerItemsWithChildren(IEnumerable<Item> containerRootItems, List<Item> inventoryItems)
    {
        var result = new List<Item>();
        if (!containerRootItems.Any())
        {
            // Container has no root items
            return result;
        }

        // Filter out all items without location prop, (child items)
        var itemsWithoutLocation = inventoryItems.Where(item => item.Location is null).ToList();
        foreach (var rootItem in containerRootItems)
        {
            // Check item in container for children, store for later insertion into `containerItemsToCheck`
            // (used later when figuring out how much space weapon takes up)
            var itemWithChildItems = _itemHelper.FindAndReturnChildrenAsItems(itemsWithoutLocation, rootItem.Id);

            // Item had children, replace existing data with item + its children
            result.Add(rootItem);
            result.AddRange(itemWithChildItems);
        }

        return result;
    }

    /// <summary>
    ///     Is the provided item allowed inside a container
    /// </summary>
    /// <param name="slotGrid">Items sub-grid we want to place item inside</param>
    /// <param name="itemTpl">Item tpl being placed</param>
    /// <returns>True if allowed</returns>
    protected bool ItemAllowedInContainer(Grid? slotGrid, string? itemTpl)
    {
        var propFilters = slotGrid?.Props?.Filters;
        var excludedFilter = propFilters?.FirstOrDefault()?.ExcludedFilter ?? [];
        var filter = propFilters?.FirstOrDefault()?.Filter ?? [];

        if (propFilters?.Count == 0)
            // no filters, item is fine to add
        {
            return true;
        }

        // Check if item base type is excluded
        var itemDetails = _itemHelper.GetItem(itemTpl).Value;

        // if item to add is found in exclude filter, not allowed
        if (excludedFilter.Contains(itemDetails?.Parent ?? string.Empty))
        {
            return false;
        }

        // If Filter array only contains 1 filter and its for basetype 'item', allow it
        if (filter.Count == 1 && filter.Contains(BaseClasses.ITEM))
        {
            return true;
        }

        // If allowed filter has something in it + filter doesnt have basetype 'item', not allowed
        if (filter.Count > 0 && !filter.Contains(itemDetails?.Parent ?? string.Empty))
        {
            return false;
        }

        return true;
    }
}