@page "/admin/servers/nodes"

@using System.Diagnostics
@using MoonCore.Exceptions
@using Moonlight.Client.App.Models.Crud
@using Moonlight.Client.App.Services
@using Moonlight.Shared.Http.Resources
@using MoonlightServers.Client.UI.Components.Forms
@using MoonlightServers.Shared.Http.Requests.Admin.Nodes
@using MoonlightServers.Shared.Http.Responses.Admin.Nodes
@using MoonlightServers.Client.UI.Components.Partials

@inject HttpApiClient HttpApiClient
@inject AlertService AlertService

@attribute [RequirePermission("admin.servers.nodes.get")]

<NavTabs Index="1" TextSize="text-base" Names="@( ["Servers", "Nodes", "Stars", "Manager"])" Links="@( ["/admin/servers", "/admin/servers/nodes", "/admin/servers/stars", "admin/servers/manager"])"/>

<div class="mt-5">
    <SmartCrud TItem="DetailNodeResponse"
               TCreateForm="CreateNodeRequest"
               TUpdateForm="UpdateNodeRequest"
               OnConfigure="OnConfigure">
        <View Context="ViewContext">
            <SmartColumn TItem="DetailNodeResponse" Field="@(x => x.Id)" Title="Id"/>
            <SmartColumn TItem="DetailNodeResponse" Field="@(x => x.Name)" Title="Name">
                <Template>
                    <a class="text-blue-500" href="#" @onclick:preventDefault @onclick="() => ViewContext.LaunchDetails(context)">@context.Name</a>
                </Template>
            </SmartColumn>
            <SmartColumn TItem="DetailNodeResponse" Field="@(x => x.Fqdn)" Title="FQDN"/>
            <SmartColumn TItem="DetailNodeResponse" Field="@(x => x.Id)">
                <Template>
                    <div class="flex justify-between">
                        @{
                            NodeFetchState? fetchState;

                            lock (StatusCache)
                                fetchState = StatusCache.ContainsKey(context.Id) ? StatusCache[context.Id] : null;
                        }

                        @if (fetchState == null)
                        {
                            <div class="text-slate-400">Loading status...</div>
                        }
                        else if (fetchState.Response != null)
                        {
                            var response = fetchState.Response!;
                            
                            <div class="text-green-500">
                                <i class="mr-1 align-middle text-lg bi bi-check-circle-fill text-green-500"></i>
                                <span>Online</span>
                            </div>
                            <div>
                                <i class="bi bi-cpu text-lg text-slate-400 mr-1"></i>
                                <span class="text-white">
                                    @(Math.Round(response.CpuUsage.Average(x => x), 2))%
                                </span>
                            </div>
                            <div>
                                <i class="bi bi-memory text-lg text-slate-400 mr-1"></i>
                                <span class="text-white">
                                    @Formatter.FormatSize((long)(response.MemoryTotal - response.MemoryAvailable))
                                    <span>/</span>
                                    @Formatter.FormatSize((long)response.MemoryTotal)
                                </span>
                            </div>
                            <div>
                                <i class="bi bi-hdd text-lg text-slate-400 mr-1"></i>
                                <span class="text-white">
                                    @Formatter.FormatSize((long)(response.DiskTotal - response.DiskFree))
                                    <span>/</span>
                                    @Formatter.FormatSize((long)response.DiskTotal)
                                </span>
                            </div>
                        }
                        else if(fetchState.Exception != null)
                        {
                            <div class="text-white">
                                <i class="mr-1 align-middle text-lg bi bi-exclamation-triangle-fill text-red-500"></i>
                                <span class="mr-1">Offline:</span>
                                
                                <a href="#" @onclick:preventDefault @onclick="() => ShowDetails(fetchState.Exception)" class="mr-1 text-red-400">
                                    Show details
                                </a>
                            </div>
                        }
                    </div>
                </Template>
            </SmartColumn>
        </View>
        <DetailView>
            <SmartTabs BarStyle="true" BarText="Details">
                <SmartTab Name="Overview">
                    <NodeOverview NodeId="@context.Id"/>
                </SmartTab>
                <SmartTab Name="Allocations">
                    <AllocationEditor NodeId="@context.Id"/>
                </SmartTab>
                <SmartTab Name="Logs">
                    <NodeLogs NodeId="@context.Id"/>
                </SmartTab>
            </SmartTabs>
        </DetailView>
    </SmartCrud>
</div>

@code
{
    private readonly Dictionary<int, NodeFetchState> StatusCache = new();

    private void OnConfigure(CrudOptions<DetailNodeResponse, CreateNodeRequest, UpdateNodeRequest> options)
    {
        options.Loader = async (page, pageSize) =>
        {
            var response = await HttpApiClient
                .GetJson<PagedResponse<DetailNodeResponse>>($"admin/servers/nodes?page={page}&pageSize={pageSize}");

            lock (StatusCache)
                StatusCache.Clear();

            Task.Run(async () =>
            {
                foreach (var node in response.Items)
                {
                    try
                    {
                        var status = await HttpApiClient.GetJson<StatusNodeResponse>($"admin/servers/nodes/{node.Id}/status");

                        lock (StatusCache)
                        {
                            StatusCache.Add(node.Id, new()
                            {
                                Response = status
                            });
                        }
                    }
                    catch (Exception e)
                    {
                        lock (StatusCache)
                        {
                            StatusCache.Add(node.Id, new()
                            {
                                Exception = e
                            });
                        }
                    }

                    await InvokeAsync(StateHasChanged);
                }
            });

            return response;
        };

        options.CreateFunction = async request => await HttpApiClient.Post("admin/servers/nodes", request);
        options.UpdateFunction = async (request, item) => await HttpApiClient.Patch($"admin/servers/nodes/{item.Id}", request);
        options.DeleteFunction = async item => await HttpApiClient.Delete($"admin/servers/nodes/{item.Id}");

        options.ShowCreateAsModal = false;
        options.ShowUpdateAsModal = false;
        options.ShowDetailsAsModal = false;

        options.ShowDetailsBar = false;

        options.OnConfigureCreate = option =>
        {
            option
                .DefaultPage
                .DefaultSection
                .AddProperty(x => x.Name);

            option
                .DefaultPage
                .DefaultSection
                .AddProperty(x => x.Fqdn);

            option
                .DefaultPage
                .DefaultSection
                .AddProperty(x => x.ApiPort);

            option
                .DefaultPage
                .DefaultSection
                .AddProperty(x => x.SslEnabled);
        };

        options.OnConfigureUpdate = (option, item) =>
        {
            option
                .DefaultPage
                .DefaultSection
                .AddProperty(x => x.Name);

            option
                .DefaultPage
                .DefaultSection
                .AddProperty(x => x.Fqdn);

            option
                .DefaultPage
                .DefaultSection
                .AddProperty(x => x.ApiPort);

            option
                .DefaultPage
                .DefaultSection
                .AddProperty(x => x.SslEnabled);
        };
    }

    private async Task ShowDetails(Exception e)
    {
        await AlertService.ErrorLog("Node connection error", e.ToStringDemystified());
    }

    class NodeFetchState
    {
        public StatusNodeResponse? Response { get; set; }
        public Exception? Exception { get; set; }
    }
}