using Content.Server.NodeContainer;
using Content.Server.NodeContainer.EntitySystems;
using Content.Server.NodeContainer.Nodes;
using Content.Server.Power.Components;
using Content.Server.Power.Nodes;
using Content.Server.Power.NodeGroups;
using Content.Server.StationEvents.Components;
using Content.Shared.GameTicking.Components;
using Content.Shared.Pinpointer;
using Content.Shared.Station.Components;
using Content.Shared.Power;
using JetBrains.Annotations;
using Robust.Server.GameObjects;
using Robust.Shared.Map.Components;
using Robust.Shared.Utility;
using System.Linq;
using Content.Shared.NodeContainer;

namespace Content.Server.Power.EntitySystems;

[UsedImplicitly]
internal sealed partial class PowerMonitoringConsoleSystem : SharedPowerMonitoringConsoleSystem
{
    [Dependency] private readonly UserInterfaceSystem _userInterfaceSystem = default!;
    [Dependency] private readonly SharedMapSystem _sharedMapSystem = default!;

    // Note: this data does not need to be saved
    private Dictionary<EntityUid, Dictionary<Vector2i, PowerCableChunk>> _gridPowerCableChunks = new();
    private float _updateTimer = 1.0f;

    private const float UpdateTime = 1.0f;
    private const float RoguePowerConsumerThreshold = 100000;

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

        // Console events
        SubscribeLocalEvent<PowerMonitoringConsoleComponent, ComponentInit>(OnConsoleInit);
        SubscribeLocalEvent<PowerMonitoringConsoleComponent, EntParentChangedMessage>(OnConsoleParentChanged);
        SubscribeLocalEvent<PowerMonitoringCableNetworksComponent, ComponentInit>(OnCableNetworksInit);
        SubscribeLocalEvent<PowerMonitoringCableNetworksComponent, EntParentChangedMessage>(OnCableNetworksParentChanged);

        // UI events
        SubscribeLocalEvent<PowerMonitoringConsoleComponent, PowerMonitoringConsoleMessage>(OnPowerMonitoringConsoleMessage);
        SubscribeLocalEvent<PowerMonitoringConsoleComponent, BoundUIOpenedEvent>(OnBoundUIOpened);

        // Grid events
        SubscribeLocalEvent<GridSplitEvent>(OnGridSplit);
        SubscribeLocalEvent<CableComponent, CableAnchorStateChangedEvent>(OnCableAnchorStateChanged);
        SubscribeLocalEvent<PowerMonitoringDeviceComponent, AnchorStateChangedEvent>(OnDeviceAnchoringChanged);
        SubscribeLocalEvent<PowerMonitoringDeviceComponent, NodeGroupsRebuilt>(OnNodeGroupRebuilt);

        // Game rule events
        SubscribeLocalEvent<GameRuleStartedEvent>(OnPowerGridCheckStarted);
        SubscribeLocalEvent<GameRuleEndedEvent>(OnPowerGridCheckEnded);
    }

    #region EventHandling

    private void OnConsoleInit(EntityUid uid, PowerMonitoringConsoleComponent component, ComponentInit args)
    {
        RefreshPowerMonitoringConsole(uid, component);
    }

    private void OnConsoleParentChanged(EntityUid uid, PowerMonitoringConsoleComponent component, EntParentChangedMessage args)
    {
        RefreshPowerMonitoringConsole(uid, component);
    }

    private void OnCableNetworksInit(EntityUid uid, PowerMonitoringCableNetworksComponent component, ComponentInit args)
    {
        RefreshPowerMonitoringCableNetworks(uid, component);
    }

    private void OnCableNetworksParentChanged(EntityUid uid, PowerMonitoringCableNetworksComponent component, EntParentChangedMessage args)
    {
        RefreshPowerMonitoringCableNetworks(uid, component);
    }

    private void OnPowerMonitoringConsoleMessage(EntityUid uid, PowerMonitoringConsoleComponent component, PowerMonitoringConsoleMessage args)
    {
        var focus = EntityManager.GetEntity(args.FocusDevice);
        var group = args.FocusGroup;

        // Update this if the focus device has changed
        if (component.Focus != focus)
        {
            component.Focus = focus;

            if (TryComp<PowerMonitoringCableNetworksComponent>(uid, out var cableNetworks))
            {
                cableNetworks.FocusChunks.Clear(); // Component will be dirtied when these chunks are rebuilt, unless the focus is null

                if (focus == null)
                    Dirty(uid, cableNetworks);
            }
        }

        // Update this if the focus group has changed
        if (component.FocusGroup != group)
        {
            component.FocusGroup = args.FocusGroup;
            Dirty(uid, component);
        }
    }

    private void OnBoundUIOpened(EntityUid uid, PowerMonitoringConsoleComponent component, BoundUIOpenedEvent args)
    {
        component.Focus = null;
        component.FocusGroup = PowerMonitoringConsoleGroup.Generator;

        if (TryComp<PowerMonitoringCableNetworksComponent>(uid, out var cableNetworks))
        {
            cableNetworks.FocusChunks.Clear();
            Dirty(uid, cableNetworks);
        }
    }

    private void OnGridSplit(ref GridSplitEvent args)
    {
        // Collect grids
        var allGrids = args.NewGrids.ToList();

        if (!allGrids.Contains(args.Grid))
            allGrids.Add(args.Grid);

        // Refresh affected power cable grids
        foreach (var grid in allGrids)
        {
            if (!TryComp<MapGridComponent>(grid, out var map))
                continue;

            RefreshPowerCableGrid(grid, map);
        }

        // Update power monitoring consoles that stand upon an updated grid
        var query = AllEntityQuery<PowerMonitoringConsoleComponent, PowerMonitoringCableNetworksComponent, TransformComponent>();
        while (query.MoveNext(out var ent, out var entConsole, out var entCableNetworks, out var entXform))
        {
            if (entXform.GridUid == null)
                continue;

            if (!allGrids.Contains(entXform.GridUid.Value))
                continue;

            RefreshPowerMonitoringConsole(ent, entConsole);
            RefreshPowerMonitoringCableNetworks(ent, entCableNetworks);
        }
    }

    public void OnCableAnchorStateChanged(EntityUid uid, CableComponent component, CableAnchorStateChangedEvent args)
    {
        var xform = args.Transform;

        if (xform.GridUid == null || !TryComp<MapGridComponent>(xform.GridUid, out var grid))
            return;

        if (!_gridPowerCableChunks.TryGetValue(xform.GridUid.Value, out var allChunks))
            allChunks = new();

        var tile = _sharedMapSystem.LocalToTile(xform.GridUid.Value, grid, xform.Coordinates);
        var chunkOrigin = SharedMapSystem.GetChunkIndices(tile, ChunkSize);

        if (!allChunks.TryGetValue(chunkOrigin, out var chunk))
        {
            chunk = new PowerCableChunk(chunkOrigin);
            allChunks[chunkOrigin] = chunk;
        }

        var relative = SharedMapSystem.GetChunkRelative(tile, ChunkSize);
        var flag = GetFlag(relative);

        if (args.Anchored)
            chunk.PowerCableData[(int) component.CableType] |= flag;

        else
            chunk.PowerCableData[(int) component.CableType] &= ~flag;

        var query = AllEntityQuery<PowerMonitoringCableNetworksComponent, TransformComponent>();
        while (query.MoveNext(out var ent, out var entCableNetworks, out var entXform))
        {
            if (entXform.GridUid != xform.GridUid)
                continue;

            entCableNetworks.AllChunks = allChunks;
            Dirty(ent, entCableNetworks);
        }
    }

    private void OnDeviceAnchoringChanged(EntityUid uid, PowerMonitoringDeviceComponent component, AnchorStateChangedEvent args)
    {
        var xform = Transform(uid);
        var gridUid = xform.GridUid;

        if (gridUid == null)
            return;

        if (component.IsCollectionMasterOrChild)
            AssignEntityAsCollectionMaster(uid, component, xform);

        var query = AllEntityQuery<PowerMonitoringConsoleComponent, TransformComponent>();
        while (query.MoveNext(out var ent, out var entConsole, out var entXform))
        {
            if (gridUid != entXform.GridUid)
                continue;

            if (!args.Anchored)
            {
                entConsole.PowerMonitoringDeviceMetaData.Remove(EntityManager.GetNetEntity(uid));
                Dirty(ent, entConsole);

                continue;
            }

            var name = MetaData(uid).EntityName;
            var coords = EntityManager.GetNetCoordinates(xform.Coordinates);

            var metaData = new PowerMonitoringDeviceMetaData(name, coords, component.Group, component.SpritePath, component.SpriteState);
            entConsole.PowerMonitoringDeviceMetaData.TryAdd(EntityManager.GetNetEntity(uid), metaData);

            Dirty(ent, entConsole);
        }
    }

    public void OnNodeGroupRebuilt(EntityUid uid, PowerMonitoringDeviceComponent component, NodeGroupsRebuilt args)
    {
        if (component.IsCollectionMasterOrChild)
            AssignEntityAsCollectionMaster(uid, component);

        var query = AllEntityQuery<PowerMonitoringConsoleComponent, PowerMonitoringCableNetworksComponent>();
        while (query.MoveNext(out var _, out var entConsole, out var entCableNetworks))
        {
            if (entConsole.Focus == uid)
                entCableNetworks.FocusChunks.Clear(); // Component is dirtied when these chunks are rebuilt
        }
    }

    private void OnPowerGridCheckStarted(ref GameRuleStartedEvent ev)
    {
        if (!TryComp<PowerGridCheckRuleComponent>(ev.RuleEntity, out var rule))
            return;

        var query = AllEntityQuery<PowerMonitoringConsoleComponent, TransformComponent>();
        while (query.MoveNext(out var uid, out var console, out var xform))
        {
            if (CompOrNull<StationMemberComponent>(xform.GridUid)?.Station == rule.AffectedStation)
            {
                console.Flags |= PowerMonitoringFlags.PowerNetAbnormalities;
                Dirty(uid, console);
            }
        }
    }

    private void OnPowerGridCheckEnded(ref GameRuleEndedEvent ev)
    {
        if (!TryComp<PowerGridCheckRuleComponent>(ev.RuleEntity, out var rule))
            return;

        var query = AllEntityQuery<PowerMonitoringConsoleComponent, TransformComponent>();
        while (query.MoveNext(out var uid, out var console, out var xform))
        {
            if (CompOrNull<StationMemberComponent>(xform.GridUid)?.Station == rule.AffectedStation)
            {
                console.Flags &= ~PowerMonitoringFlags.PowerNetAbnormalities;
                Dirty(uid, console);
            }
        }
    }

    #endregion

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

        _updateTimer += frameTime;

        if (_updateTimer >= UpdateTime)
        {
            _updateTimer -= UpdateTime;

            var query = AllEntityQuery<PowerMonitoringConsoleComponent>();
            while (query.MoveNext(out var ent, out var console))
            {
                if (!_userInterfaceSystem.IsUiOpen(ent, PowerMonitoringConsoleUiKey.Key))
                    continue;

                UpdateUIState(ent, console);

            }
        }
    }

    private void UpdateUIState(EntityUid uid, PowerMonitoringConsoleComponent component)
    {
        var consoleXform = Transform(uid);

        if (consoleXform?.GridUid == null)
            return;

        var gridUid = consoleXform.GridUid.Value;

        if (!TryComp<MapGridComponent>(gridUid, out var mapGrid))
            return;

        // The grid must have a NavMapComponent to visualize the map in the UI
        EnsureComp<NavMapComponent>(gridUid);

        // Initializing data to be send to the client
        var totalSources = 0d;
        var totalBatteryUsage = 0d;
        var totalLoads = 0d;
        var allEntries = new List<PowerMonitoringConsoleEntry>();
        var sourcesForFocus = new List<PowerMonitoringConsoleEntry>();
        var loadsForFocus = new List<PowerMonitoringConsoleEntry>();
        var flags = component.Flags;

        // Reset RoguePowerConsumer flag
        component.Flags &= ~PowerMonitoringFlags.RoguePowerConsumer;

        // Record the load value of all non-tracked power consumers on the same grid as the console
        var powerConsumerQuery = AllEntityQuery<PowerConsumerComponent, TransformComponent>();
        while (powerConsumerQuery.MoveNext(out var ent, out var powerConsumer, out var xform))
        {
            if (xform.Anchored == false || xform.GridUid != gridUid)
                continue;

            if (TryComp<PowerMonitoringDeviceComponent>(ent, out var device))
                continue;

            // Flag an alert if power consumption is ridiculous
            if (powerConsumer.ReceivedPower >= RoguePowerConsumerThreshold)
                component.Flags |= PowerMonitoringFlags.RoguePowerConsumer;

            totalLoads += powerConsumer.DrawRate;
        }

        if (component.Flags != flags)
            Dirty(uid, component);

        // Loop over all tracked devices
        var powerMonitoringDeviceQuery = AllEntityQuery<PowerMonitoringDeviceComponent, TransformComponent>();
        while (powerMonitoringDeviceQuery.MoveNext(out var ent, out var device, out var xform))
        {
            // Ignore joint, non-master entities
            if (device.IsCollectionMasterOrChild && !device.IsCollectionMaster)
                continue;

            if (xform.Anchored == false || xform.GridUid != gridUid)
                continue;

            // Get the device power stats
            var powerStats = GetPowerStats(ent, device);
            //, out var powerSupplied, out var powerUsage, out var batteryUsage);

            // Update all running totals
            totalSources += powerStats.PowerSupplied;
            totalLoads += powerStats.PowerUsage;
            totalBatteryUsage += powerStats.BatteryUsage;

            // Continue on if the device is not in the current focus group
            if (device.Group != component.FocusGroup)
                continue;

            // Generate a new console entry with which to populate the UI
            var entry = new PowerMonitoringConsoleEntry(EntityManager.GetNetEntity(ent), device.Group, powerStats.PowerValue, powerStats.BatteryLevel);
            allEntries.Add(entry);
        }

        // Update the UI focus data (if applicable)
        if (component.Focus != null)
        {
            if (TryComp<NodeContainerComponent>(component.Focus, out var nodeContainer) &&
                TryComp<PowerMonitoringDeviceComponent>(component.Focus, out var device))
            {
                // Record the tracked sources powering the device
                if (nodeContainer.Nodes.TryGetValue(device.SourceNode, out var sourceNode))
                    GetSourcesForNode(component.Focus.Value, sourceNode, out sourcesForFocus);

                // Search for the enabled load node (required for portable generators)
                var loadNodeName = device.LoadNode;

                if (device.LoadNodes != null)
                {
                    var foundNode = nodeContainer.Nodes.FirstOrNull(x => x.Value is CableDeviceNode && (x.Value as CableDeviceNode)?.Enabled == true);

                    if (foundNode != null)
                        loadNodeName = foundNode.Value.Key;
                }

                // Record the tracked loads on the device
                if (nodeContainer.Nodes.TryGetValue(loadNodeName, out var loadNode))
                    GetLoadsForNode(component.Focus.Value, loadNode, out loadsForFocus);

                // If the UI focus changed, update the highlighted power network
                if (TryComp<PowerMonitoringCableNetworksComponent>(uid, out var cableNetworks) &&
                    cableNetworks.FocusChunks.Count == 0)
                {
                    var reachableEntities = new List<EntityUid>();

                    if (sourceNode?.NodeGroup != null)
                    {
                        foreach (var node in sourceNode.NodeGroup.Nodes)
                            reachableEntities.Add(node.Owner);
                    }

                    if (loadNode?.NodeGroup != null)
                    {
                        foreach (var node in loadNode.NodeGroup.Nodes)
                            reachableEntities.Add(node.Owner);
                    }

                    UpdateFocusNetwork(uid, cableNetworks, gridUid, mapGrid, reachableEntities);
                }
            }
        }

        // Set the UI state
        _userInterfaceSystem.SetUiState(uid,
            PowerMonitoringConsoleUiKey.Key,
            new PowerMonitoringConsoleBoundInterfaceState
                (totalSources,
                totalBatteryUsage,
                totalLoads,
                allEntries.ToArray(),
                sourcesForFocus.ToArray(),
                loadsForFocus.ToArray()));
    }

    private PowerStats GetPowerStats(EntityUid uid, PowerMonitoringDeviceComponent device)
    {
        var stats = new PowerStats();

        if (device.Group == PowerMonitoringConsoleGroup.Generator)
        {
            // This covers most power sources
            if (TryComp<PowerSupplierComponent>(uid, out var supplier))
            {
                stats.PowerValue = supplier.CurrentSupply;
                stats.PowerSupplied += stats.PowerValue;
            }

            // Edge case: radiation collectors
            else if (TryComp<BatteryDischargerComponent>(uid, out var _) &&
                TryComp<PowerNetworkBatteryComponent>(uid, out var battery))
            {
                stats.PowerValue = battery.NetworkBattery.CurrentSupply;
                stats.PowerSupplied += stats.PowerValue;


                stats.BatteryLevel = GetBatteryLevel(uid);
            }
        }

        else if (device.Group == PowerMonitoringConsoleGroup.SMES ||
            device.Group == PowerMonitoringConsoleGroup.Substation ||
            device.Group == PowerMonitoringConsoleGroup.APC)
        {

            if (TryComp<PowerNetworkBatteryComponent>(uid, out var battery))
            {
                stats.BatteryLevel = GetBatteryLevel(uid);

                stats.PowerValue = battery.CurrentSupply;

                // Load due to network battery recharging
                stats.PowerUsage += Math.Max(battery.CurrentReceiving - battery.CurrentSupply, 0d);

                // Track battery usage
                stats.BatteryUsage += Math.Max(battery.CurrentSupply - battery.CurrentReceiving, 0d);

                // Records loads attached to APCs
                if (device.Group == PowerMonitoringConsoleGroup.APC && battery.Enabled)
                {
                    stats.PowerUsage += battery.NetworkBattery.LoadingNetworkDemand;
                }
            }
        }

        // Master devices add the power values from all entities they represent (if applicable)
        if (device.IsCollectionMasterOrChild && device.IsCollectionMaster)
        {
            foreach ((var child, var childDevice) in device.ChildDevices)
            {
                if (child == uid)
                    continue;

                // Safeguard to prevent infinite loops
                if (childDevice.IsCollectionMaster && childDevice.ChildDevices.ContainsKey(uid))
                    continue;

                var childResult = GetPowerStats(child, childDevice);

                stats.PowerValue += childResult.PowerValue;
                stats.PowerSupplied += childResult.PowerSupplied;
                stats.PowerUsage += childResult.PowerUsage;
                stats.BatteryUsage += childResult.BatteryUsage;
            }
        }

        return stats;
    }

    private float? GetBatteryLevel(EntityUid uid)
    {
        if (!TryComp<BatteryComponent>(uid, out var battery))
            return null;

        var effectiveMax = battery.MaxCharge;
        if (effectiveMax == 0)
            effectiveMax = 1;

        return battery.CurrentCharge / effectiveMax;
    }

    private void GetSourcesForNode(EntityUid uid, Node node, out List<PowerMonitoringConsoleEntry> sources)
    {
        sources = new List<PowerMonitoringConsoleEntry>();

        if (node.NodeGroup is not PowerNet netQ)
            return;

        var indexedSources = new Dictionary<EntityUid, PowerMonitoringConsoleEntry>();
        var currentSupply = 0f;
        var currentDemand = 0f;

        foreach (var powerSupplier in netQ.Suppliers)
        {
            var ent = powerSupplier.Owner;

            if (uid == ent)
                continue;

            currentSupply += powerSupplier.CurrentSupply;

            if (TryComp<PowerMonitoringDeviceComponent>(ent, out var entDevice))
            {
                // Combine entities represented by an master into a single entry
                if (entDevice.IsCollectionMasterOrChild && !entDevice.IsCollectionMaster)
                    ent = entDevice.CollectionMaster;

                if (indexedSources.TryGetValue(ent, out var entry))
                {
                    entry.PowerValue += powerSupplier.CurrentSupply;
                    indexedSources[ent] = entry;

                    continue;
                }

                indexedSources.Add(ent, new PowerMonitoringConsoleEntry(EntityManager.GetNetEntity(ent), entDevice.Group, powerSupplier.CurrentSupply, GetBatteryLevel(ent)));
            }
        }

        foreach (var batteryDischarger in netQ.Dischargers)
        {
            var ent = batteryDischarger.Owner;

            if (uid == ent)
                continue;

            if (!TryComp<PowerNetworkBatteryComponent>(ent, out var entBattery))
                continue;

            currentSupply += entBattery.CurrentSupply;

            if (TryComp<PowerMonitoringDeviceComponent>(ent, out var entDevice))
            {
                // Combine entities represented by an master into a single entry
                if (entDevice.IsCollectionMasterOrChild && !entDevice.IsCollectionMaster)
                    ent = entDevice.CollectionMaster;

                if (indexedSources.TryGetValue(ent, out var entry))
                {
                    entry.PowerValue += entBattery.CurrentSupply;
                    indexedSources[ent] = entry;

                    continue;
                }

                indexedSources.Add(ent, new PowerMonitoringConsoleEntry(EntityManager.GetNetEntity(ent), entDevice.Group, entBattery.CurrentSupply, GetBatteryLevel(ent)));
            }
        }

        sources = indexedSources.Values.ToList();

        // Get the total demand for the network
        foreach (var powerConsumer in netQ.Consumers)
        {
            currentDemand += powerConsumer.ReceivedPower;
        }

        foreach (var batteryCharger in netQ.Chargers)
        {
            var ent = batteryCharger.Owner;

            if (!TryComp<PowerNetworkBatteryComponent>(ent, out var entBattery))
                continue;

            currentDemand += entBattery.CurrentReceiving;
        }

        // Exit if supply / demand is negligible
        if (MathHelper.CloseTo(currentDemand, 0) || MathHelper.CloseTo(currentSupply, 0))
            return;

        // Work out how much power this device (and those it represents) is actually receiving
        if (!TryComp<PowerNetworkBatteryComponent>(uid, out var battery))
            return;

        var powerUsage = battery.CurrentReceiving;

        if (TryComp<PowerMonitoringDeviceComponent>(uid, out var device) && device.IsCollectionMaster)
        {
            foreach ((var child, var _) in device.ChildDevices)
            {
                if (TryComp<PowerNetworkBatteryComponent>(child, out var childBattery))
                    powerUsage += childBattery.CurrentReceiving;
            }
        }

        // Update the power value for each source based on the fraction of power the entity is actually draining from each
        var powerFraction = Math.Min(powerUsage / currentSupply, 1f) * Math.Min(currentSupply / currentDemand, 1f);

        for (int i = 0; i < sources.Count; i++)
        {
            var entry = sources[i];
            sources[i] = new PowerMonitoringConsoleEntry(entry.NetEntity, entry.Group, entry.PowerValue * powerFraction, entry.BatteryLevel);
        }
    }

    private void GetLoadsForNode(EntityUid uid, Node node, out List<PowerMonitoringConsoleEntry> loads, List<EntityUid>? children = null)
    {
        loads = new List<PowerMonitoringConsoleEntry>();

        if (node.NodeGroup is not PowerNet netQ)
            return;

        var indexedLoads = new Dictionary<EntityUid, PowerMonitoringConsoleEntry>();
        var currentDemand = 0f;

        foreach (var powerConsumer in netQ.Consumers)
        {
            var ent = powerConsumer.Owner;

            if (uid == ent)
                continue;

            currentDemand += powerConsumer.ReceivedPower;

            if (TryComp<PowerMonitoringDeviceComponent>(ent, out var entDevice))
            {
                // Combine entities represented by an master into a single entry
                if (entDevice.IsCollectionMasterOrChild && !entDevice.IsCollectionMaster)
                    ent = entDevice.CollectionMaster;

                if (indexedLoads.TryGetValue(ent, out var entry))
                {
                    entry.PowerValue += powerConsumer.ReceivedPower;
                    indexedLoads[ent] = entry;

                    continue;
                }

                indexedLoads.Add(ent, new PowerMonitoringConsoleEntry(EntityManager.GetNetEntity(ent), entDevice.Group, powerConsumer.ReceivedPower, GetBatteryLevel(ent)));
            }
        }

        foreach (var batteryCharger in netQ.Chargers)
        {
            var ent = batteryCharger.Owner;

            if (uid == ent)
                continue;

            if (!TryComp<PowerNetworkBatteryComponent>(ent, out var battery))
                continue;

            currentDemand += battery.CurrentReceiving;

            if (TryComp<PowerMonitoringDeviceComponent>(ent, out var entDevice))
            {
                // Combine entities represented by an master into a single entry
                if (entDevice.IsCollectionMasterOrChild && !entDevice.IsCollectionMaster)
                    ent = entDevice.CollectionMaster;

                if (indexedLoads.TryGetValue(ent, out var entry))
                {
                    entry.PowerValue += battery.CurrentReceiving;
                    indexedLoads[ent] = entry;

                    continue;
                }

                indexedLoads.Add(ent, new PowerMonitoringConsoleEntry(EntityManager.GetNetEntity(ent), entDevice.Group, battery.CurrentReceiving, GetBatteryLevel(ent)));
            }
        }

        loads = indexedLoads.Values.ToList();

        // Exit if demand is negligible
        if (MathHelper.CloseTo(currentDemand, 0))
            return;

        var supplying = 0f;

        // Work out how much power this device (and those it represents) is actually supplying
        if (TryComp<PowerNetworkBatteryComponent>(uid, out var entBattery))
            supplying = entBattery.CurrentSupply;

        else if (TryComp<PowerSupplierComponent>(uid, out var entSupplier))
            supplying = entSupplier.CurrentSupply;

        if (TryComp<PowerMonitoringDeviceComponent>(uid, out var device) && device.IsCollectionMaster)
        {
            foreach ((var child, var _) in device.ChildDevices)
            {
                if (TryComp<PowerNetworkBatteryComponent>(child, out var childBattery))
                    supplying += childBattery.CurrentSupply;

                else if (TryComp<PowerSupplierComponent>(child, out var childSupplier))
                    supplying += childSupplier.CurrentSupply;
            }
        }

        // Update the power value for each load based on the fraction of power these entities are actually draining from this device
        var powerFraction = Math.Min(supplying / currentDemand, 1f);

        for (int i = 0; i < indexedLoads.Values.Count; i++)
        {
            var entry = loads[i];
            loads[i] = new PowerMonitoringConsoleEntry(entry.NetEntity, entry.Group, entry.PowerValue * powerFraction, entry.BatteryLevel);
        }
    }

    // Designates a supplied entity as a 'collection master'. Other entities which share this
    // entities collection name and are attached on the same load network are assigned this entity
    // as the master that represents them on the console UI. This way you can have one device
    // represent multiple connected devices
    private void AssignEntityAsCollectionMaster
        (EntityUid uid,
        PowerMonitoringDeviceComponent? device = null,
        TransformComponent? xform = null,
        NodeContainerComponent? nodeContainer = null)
    {
        if (!Resolve(uid, ref device, ref nodeContainer, ref xform, false))
            return;

        // If the device is not attached to a network, exit
        var nodeName = device.SourceNode == string.Empty ? device.LoadNode : device.SourceNode;

        if (!nodeContainer.Nodes.TryGetValue(nodeName, out var node) ||
            node.ReachableNodes.Count == 0)
        {
            // Make a child the new master of the collection if necessary
            if (device.ChildDevices.TryFirstOrNull(out var kvp))
            {
                var newMaster = kvp.Value.Key;
                var newMasterDevice = kvp.Value.Value;

                newMasterDevice.CollectionMaster = newMaster;
                newMasterDevice.ChildDevices.Clear();

                foreach ((var child, var childDevice) in device.ChildDevices)
                {
                    newMasterDevice.ChildDevices.Add(child, childDevice);

                    childDevice.CollectionMaster = newMaster;
                    UpdateCollectionChildMetaData(child, newMaster);
                }

                UpdateCollectionMasterMetaData(newMaster, newMasterDevice.ChildDevices.Count);
            }

            device.CollectionMaster = uid;
            device.ChildDevices.Clear();
            UpdateCollectionMasterMetaData(uid, 0);

            return;
        }

        // Check to see if the device has a valid existing master
        if (!device.IsCollectionMaster &&
            device.CollectionMaster.IsValid() &&
            TryComp<NodeContainerComponent>(device.CollectionMaster, out var masterNodeContainer) &&
            DevicesHaveMatchingNodes(nodeContainer, masterNodeContainer))
            return;

        // If not, make this a new master
        device.CollectionMaster = uid;
        device.ChildDevices.Clear();

        // Search for children
        var query = AllEntityQuery<PowerMonitoringDeviceComponent, TransformComponent, NodeContainerComponent>();
        while (query.MoveNext(out var ent, out var entDevice, out var entXform, out var entNodeContainer))
        {
            if (entDevice.CollectionName != device.CollectionName)
                continue;

            if (ent == uid)
                continue;

            if (entXform.GridUid != xform.GridUid)
                continue;

            if (!DevicesHaveMatchingNodes(nodeContainer, entNodeContainer))
                continue;

            device.ChildDevices.Add(ent, entDevice);

            entDevice.CollectionMaster = uid;
            UpdateCollectionChildMetaData(ent, uid);
        }

        UpdateCollectionMasterMetaData(uid, device.ChildDevices.Count);
    }

    private bool DevicesHaveMatchingNodes(NodeContainerComponent nodeContainerA, NodeContainerComponent nodeContainerB)
    {
        foreach ((var key, var nodeA) in nodeContainerA.Nodes)
        {
            if (!nodeContainerB.Nodes.TryGetValue(key, out var nodeB))
                return false;

            if (nodeA.NodeGroup != nodeB.NodeGroup)
                return false;
        }

        return true;
    }

    private void UpdateCollectionChildMetaData(EntityUid child, EntityUid master)
    {
        var netEntity = EntityManager.GetNetEntity(child);
        var xform = Transform(child);

        var query = AllEntityQuery<PowerMonitoringConsoleComponent, TransformComponent>();
        while (query.MoveNext(out var ent, out var entConsole, out var entXform))
        {
            if (entXform.GridUid != xform.GridUid)
                continue;

            if (!entConsole.PowerMonitoringDeviceMetaData.TryGetValue(netEntity, out var metaData))
                continue;

            metaData.CollectionMaster = EntityManager.GetNetEntity(master);
            entConsole.PowerMonitoringDeviceMetaData[netEntity] = metaData;

            Dirty(ent, entConsole);
        }
    }

    private void UpdateCollectionMasterMetaData(EntityUid master, int childCount)
    {
        var netEntity = EntityManager.GetNetEntity(master);
        var xform = Transform(master);

        var query = AllEntityQuery<PowerMonitoringConsoleComponent, TransformComponent>();
        while (query.MoveNext(out var ent, out var entConsole, out var entXform))
        {
            if (entXform.GridUid != xform.GridUid)
                continue;

            if (!entConsole.PowerMonitoringDeviceMetaData.TryGetValue(netEntity, out var metaData))
                continue;

            if (childCount > 0)
            {
                var name = MetaData(master).EntityPrototype?.Name ?? MetaData(master).EntityName;
                metaData.EntityName = Loc.GetString("power-monitoring-window-object-array", ("name", name), ("count", childCount + 1));
            }

            else
            {
                metaData.EntityName = MetaData(master).EntityName;
            }

            metaData.CollectionMaster = null;
            entConsole.PowerMonitoringDeviceMetaData[netEntity] = metaData;

            Dirty(ent, entConsole);
        }
    }

    private Dictionary<Vector2i, PowerCableChunk> RefreshPowerCableGrid(EntityUid gridUid, MapGridComponent grid)
    {
        // Clears all chunks for the associated grid
        var allChunks = new Dictionary<Vector2i, PowerCableChunk>();
        _gridPowerCableChunks[gridUid] = allChunks;

        // Adds all power cables to the grid
        var query = AllEntityQuery<CableComponent, TransformComponent>();
        while (query.MoveNext(out var ent, out var cable, out var entXform))
        {
            if (entXform.GridUid != gridUid)
                continue;

            var tile = _sharedMapSystem.GetTileRef(gridUid, grid, entXform.Coordinates);
            var chunkOrigin = SharedMapSystem.GetChunkIndices(tile.GridIndices, ChunkSize);

            if (!allChunks.TryGetValue(chunkOrigin, out var chunk))
            {
                chunk = new PowerCableChunk(chunkOrigin);
                allChunks[chunkOrigin] = chunk;
            }

            var relative = SharedMapSystem.GetChunkRelative(tile.GridIndices, ChunkSize);
            var flag = GetFlag(relative);

            chunk.PowerCableData[(int) cable.CableType] |= flag;
        }

        return allChunks;
    }

    private void UpdateFocusNetwork(EntityUid uid, PowerMonitoringCableNetworksComponent component, EntityUid gridUid, MapGridComponent grid, List<EntityUid> nodeList)
    {
        component.FocusChunks.Clear();

        foreach (var ent in nodeList)
        {
            var xform = Transform(ent);
            var tile = _sharedMapSystem.GetTileRef(gridUid, grid, xform.Coordinates);
            var gridIndices = tile.GridIndices;
            var chunkOrigin = SharedMapSystem.GetChunkIndices(gridIndices, ChunkSize);

            if (!component.FocusChunks.TryGetValue(chunkOrigin, out var chunk))
            {
                chunk = new PowerCableChunk(chunkOrigin);
                component.FocusChunks[chunkOrigin] = chunk;
            }

            var relative = SharedMapSystem.GetChunkRelative(gridIndices, ChunkSize);
            var flag = GetFlag(relative);

            if (TryComp<CableComponent>(ent, out var cable))
                chunk.PowerCableData[(int) cable.CableType] |= flag;
        }

        Dirty(uid, component);
    }

    private void RefreshPowerMonitoringConsole(EntityUid uid, PowerMonitoringConsoleComponent component)
    {
        component.Focus = null;
        component.FocusGroup = PowerMonitoringConsoleGroup.Generator;
        component.PowerMonitoringDeviceMetaData.Clear();
        component.Flags = 0;

        var xform = Transform(uid);

        if (xform.GridUid == null)
            return;

        var grid = xform.GridUid.Value;

        var query = AllEntityQuery<PowerMonitoringDeviceComponent, TransformComponent>();
        while (query.MoveNext(out var ent, out var entDevice, out var entXform))
        {
            if (grid != entXform.GridUid)
                continue;

            var netEntity = EntityManager.GetNetEntity(ent);
            var name = MetaData(ent).EntityName;
            var netCoords = EntityManager.GetNetCoordinates(entXform.Coordinates);

            var metaData = new PowerMonitoringDeviceMetaData(name, netCoords, entDevice.Group, entDevice.SpritePath, entDevice.SpriteState);

            if (entDevice.IsCollectionMasterOrChild)
            {
                if (!entDevice.IsCollectionMaster)
                {
                    metaData.CollectionMaster = EntityManager.GetNetEntity(entDevice.CollectionMaster);
                }

                else if (entDevice.ChildDevices.Count > 0)
                {
                    name = MetaData(ent).EntityPrototype?.Name ?? MetaData(ent).EntityName;
                    metaData.EntityName = Loc.GetString("power-monitoring-window-object-array", ("name", name), ("count", entDevice.ChildDevices.Count + 1));
                }
            }

            component.PowerMonitoringDeviceMetaData.Add(netEntity, metaData);
        }

        Dirty(uid, component);
    }

    private void RefreshPowerMonitoringCableNetworks(EntityUid uid, PowerMonitoringCableNetworksComponent component)
    {
        var xform = Transform(uid);

        if (xform.GridUid == null)
            return;

        var grid = xform.GridUid.Value;

        if (!TryComp<MapGridComponent>(grid, out var map))
            return;

        if (!_gridPowerCableChunks.TryGetValue(grid, out var allChunks))
            allChunks = RefreshPowerCableGrid(grid, map);

        component.AllChunks = allChunks;
        component.FocusChunks.Clear();

        Dirty(uid, component);
    }

    private struct PowerStats
    {
        public double PowerValue { get; set; }
        public double PowerSupplied { get; set; }
        public double PowerUsage { get; set; }
        public double BatteryUsage { get; set; }
        public float? BatteryLevel { get; set; }
    }
}