@using RackPeek.Domain.Resources.SystemResources
@using RackPeek.Domain.Resources.SystemResources.UseCases
@inject ISystemRepository SystemRepository
@inject UpdateSystemUseCase UpdateSystemUseCase
@inject NavigationManager Nav

<div class="min-h-screen bg-zinc-950 text-zinc-200 font-mono p-6 space-y-6">

    <AddSystemComponent OnCreated="NavigateToNewResource"/>

    @if (_systems is null)
    {
        <div class="text-zinc-500">loading systems…</div>
    }
    else if (_systems.Count == 0)
    {
        <div class="text-zinc-500">no systems found</div>
    }
    else
    {
        <div class="space-y-4">
            @foreach (var group in _systems
                .OrderBy(s => s.Name)
                .GroupBy(s => s.RunsOn)
                .OrderByDescending(g => g.Count()))
            {
                foreach (var systemResource in group)
                {
                    <SystemCardComponent System="systemResource"
                                         OnSave="UpdateSystem"
                                         OnDeleted="Callback"/>
                }
            }
        </div>
    }
</div>
@code {
    [Parameter] public string? TypeFilter { get; set; }
    [Parameter] public string? OsFilter { get; set; }

    private IReadOnlyList<SystemResource>? _systems;

    protected override async Task OnParametersSetAsync()
    {
        await Reload();
    }

    private async Task Reload()
    {
        var type = Normalize(TypeFilter);
        var os = Normalize(OsFilter);

        if (string.IsNullOrEmpty(type) && string.IsNullOrEmpty(os))
        {
            _systems = await SystemRepository.GetAllAsync();
        }
        else
        {
            _systems = await SystemRepository.GetFilteredAsync(
            type,
            os
            );
        }
    }

    private static string? Normalize(string? s)
        => string.IsNullOrWhiteSpace(s) ? null : s.Trim();

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

        await Reload();
    }

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

    private async Task Callback(string obj)
    {
        await Reload();
    }
}