@page "/systems/list"
@using RackPeek.Domain.Persistence
@using RackPeek.Domain.Resources.SystemResources
@using RackPeek.Domain.Resources.SystemResources.UseCases
@inject NavigationManager Nav

<!-- TODO: Get rid of First -->
<ResourcesListComponent TResource="SystemResource"
                        Title="@PageTitle"
                        TestId="systems"
                        Resources="@Systems"
                        ShouldGroup="true"
                        GroupBy="@(s => { return s.RunsOn.FirstOrDefault(); })"
                        OnCreated="NavigateToNewResource">

    <ItemTemplate Context="systemResource">
        <div data-testid=@($"systems-list-item-{systemResource.Name.Replace(" ", "-")}")>
            <SystemCardComponent System="systemResource"
                                 OnSave="UpdateSystem"
                                 OnDeleted="Reload"/>
        </div>
    </ItemTemplate>

</ResourcesListComponent>

@code {

    [Inject] IResourceCollection Repo { get; set; } = default!;
    [Inject] ISystemRepository SystemRepo { get; set; } = default!;
    [Inject] UpdateSystemUseCase UpdateSystemUseCase { get; set; } = default!;

    [Parameter]
    [SupplyParameterFromQuery(Name = "type")]
    public string? Type { get; set; }

    [Parameter]
    [SupplyParameterFromQuery(Name = "os")]
    public string? Os { get; set; }

    public IReadOnlyList<SystemResource> Systems { get; set; } = new List<SystemResource>();

    // Computed title that reflects active filters
    private string PageTitle
    {
        get
        {
            var type = Normalize(Type);
            var os = Normalize(Os);

            if (string.IsNullOrEmpty(type) && string.IsNullOrEmpty(os))
                return "Systems";

            var parts = new List<string>();
            if (!string.IsNullOrEmpty(type)) parts.Add(type);
            if (!string.IsNullOrEmpty(os)) parts.Add(os);

            return $"Systems ({string.Join(" / ", parts)})";
        }
    }

    protected override async Task OnInitializedAsync()
    {
        await Reload();
        await base.OnInitializedAsync();
    }

    protected override async Task OnParametersSetAsync()
    {
        // If query params change while staying on the page, keep list + title in sync
        await Reload();
        await base.OnParametersSetAsync();
    }

    private async Task Reload(string _ = "")
    {
        var type = Normalize(Type);
        var os = Normalize(Os);

        if (string.IsNullOrEmpty(type) && string.IsNullOrEmpty(os))
        {
            Systems = await Repo.GetAllOfTypeAsync<SystemResource>();
        }
        else
        {
            Systems = await SystemRepo.GetFilteredAsync(type, os);
        }
    }

    private static string? Normalize(string? s)
    {
        return string.IsNullOrWhiteSpace(s) ? null : s.Trim();
    }

    private async Task UpdateSystem(SystemEditModel edit)
    {
        await UpdateSystemUseCase.ExecuteAsync(
            edit.Name,
            edit.Type,
            edit.Os,
            edit.Cores,
            edit.Ram,
            edit.Ip,
            edit.RunsOn,
            edit.Notes
        );

        await Reload();
    }

    private Task NavigateToNewResource(string name)
    {
        Nav.NavigateTo($"resources/systems/{Uri.EscapeDataString(name)}");
        return Task.CompletedTask;
    }

}