@page "/admin/servers/all"

@using MoonCore.Blazor.FlyonUi.Alerts
@using MoonCore.Blazor.FlyonUi.Common
@using MoonCore.Blazor.FlyonUi.Toasts
@using MoonCore.Helpers
@using MoonlightServers.Shared.Http.Responses.Admin.Nodes
@using MoonlightServers.Shared.Http.Responses.Admin.Servers
@using MoonlightServers.Shared.Http.Responses.Admin.Stars
@using MoonCore.Blazor.FlyonUi.Components
@using MoonCore.Blazor.FlyonUi.Grid
@using MoonCore.Blazor.FlyonUi.Grid.Columns
@using MoonCore.Common
@using Moonlight.Shared.Http.Responses.Admin.Users

@inject HttpApiClient ApiClient
@inject AlertService AlertService
@inject ToastService ToastService

@attribute [Authorize(Policy = "permissions:admin.servers.get")]

<div class="mb-3">
    <NavTabs Index="1" Names="@UiConstants.AdminNavNames" Links="@UiConstants.AdminNavLinks"/>
</div>

<div class="mb-5">
    <PageHeader Title="Servers">
        <a href="/admin/servers/all/create" class="btn btn-primary">
            Create
        </a>
    </PageHeader>
</div>

<DataGrid @ref="Grid"
          TGridItem="ServerResponse"
          ItemSource="ItemSource">
    <PropertyColumn Field="x => x.Id"/>
    <TemplateColumn Title="Name">
        <td>
            <a class="text-primary" href="/admin/servers/all/update/@context.Id">
                @context.Name
            </a>
        </td>
    </TemplateColumn>
    <TemplateColumn Title="Owner">
        <td>
            @{
                var owner = Users.GetValueOrDefault(context.OwnerId);
            }

            <span>
                @(owner?.Username ?? "N/A")
            </span>
        </td>
    </TemplateColumn>
    <TemplateColumn Title="Node">
        <td>
            @{
                var node = Nodes.GetValueOrDefault(context.NodeId);
            }

            <span>
                @(node?.Name ?? "N/A")
            </span>
        </td>
    </TemplateColumn>
    <TemplateColumn Title="Star">
        <td>
            @{
                var star = Stars.GetValueOrDefault(context.StarId);
            }

            <span>
                @(star?.Name ?? "N/A")
            </span>
        </td>
    </TemplateColumn>
    <TemplateColumn Title="Actions">
        <td>
            <div class="flex justify-end">
                <a href="/admin/servers/all/update/@(context.Id)" class="text-primary mr-2 sm:mr-3">
                    <i class="icon-pencil text-base"></i>
                </a>

                <a href="#" @onclick="() => DeleteAsync(context)" @onclick:preventDefault
                   class="text-error">
                    <i class="icon-trash text-base"></i>
                </a>
            </div>
        </td>
    </TemplateColumn>
</DataGrid>

@code
{
    private DataGrid<ServerResponse> Grid;

    private Dictionary<int, StarResponse> Stars = new();
    private Dictionary<int, NodeResponse> Nodes = new();
    private Dictionary<int, UserResponse> Users = new();

    private ItemSource<ServerResponse> ItemSource => ItemSourceFactory.From(LoadAsync);

    private async Task<IEnumerable<ServerResponse>> LoadAsync(int startIndex, int count)
    {
        var query = $"?startIndex={startIndex}&count={count}";

        var countedData = await ApiClient.GetJson<CountedData<ServerResponse>>($"api/admin/servers{query}");

        // Fetch relations

        var nodesToFetch = countedData.Items
            .Where(x => !Nodes.ContainsKey(x.Id))
            .Select(x => x.Id)
            .Distinct();

        foreach (var id in nodesToFetch)
        {
            var node = await ApiClient.GetJson<NodeResponse>($"api/admin/servers/nodes/{id}");
            Nodes[node.Id] = node;
        }

        var starsToFetch = countedData.Items
            .Where(x => !Stars.ContainsKey(x.Id))
            .Select(x => x.Id)
            .Distinct();

        foreach (var id in starsToFetch)
        {
            var star = await ApiClient.GetJson<StarResponse>($"api/admin/servers/stars/{id}");
            Stars[star.Id] = star;
        }

        var usersToFetch = countedData.Items
            .Where(x => !Users.ContainsKey(x.Id))
            .Select(x => x.Id)
            .Distinct();

        foreach (var id in usersToFetch)
        {
            var user = await ApiClient.GetJson<UserResponse>($"api/admin/users/{id}");
            Users[user.Id] = user;
        }

        return countedData;
    }

    private async Task DeleteAsync(ServerResponse response)
    {
        await AlertService.ConfirmDangerAsync(
            "Server deletion",
            $"Do you really want to delete the server '{response.Name}'",
            async () =>
            {
                await ApiClient.Delete($"api/admin/servers/{response.Id}");
                await ToastService.SuccessAsync("Successfully deleted server");

                await Grid.RefreshAsync();
            }
        );
    }
}