@page "/dms/upload"
@using MudBlazor
@inject Pldpro.Web.UI.Services.IDocumentClient Client
@inject NavigationManager Nav
@inject ISnackbar Snackbar

<PageTitle>Upload</PageTitle>

<MudPaper Class="pa-4">
    <MudText Typo="Typo.h5" GutterBottom="true">Dokument-Upload</MudText>

    <MudStack Spacing="2">
        <MudSelect T="string" @bind-Value="_bucket" Label="Bucket" Dense="true" Style="min-width:260px" Required="true" RequiredError="Bitte Bucket wählen">
            @foreach (var b in _buckets)
            {
                <MudSelectItem Value="@b">@b</MudSelectItem>
            }
        </MudSelect>

        <MudTextField @bind-Value="_path"
                      Placeholder="Pfad (optional, z. B. rechnungen/2026)"
                      Variant="Variant.Outlined"
                      Adornment="Adornment.Start"
                      AdornmentIcon="@Icons.Material.Filled.Folder" />

        <InputFile OnChange="OnFilesSelected" multiple />


        <MudList T="string" Dense="true">
            @foreach (var msg in _messages)
            {
                <MudListItem>@msg</MudListItem>
            }
        </MudList>


        <MudStack Row="true" Spacing="2">
            <MudButton Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.List" OnClick="@(() => Nav.NavigateTo("/dms/list"))">
                Zur Liste
            </MudButton>
            <MudButton Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.Dashboard" OnClick="@(() => Nav.NavigateTo("/dms"))">
                Dashboard
            </MudButton>
        </MudStack>
    </MudStack>
</MudPaper>

@code {
    private List<string> _buckets = new();
    private string? _bucket;
    private string? _path;

    private RenderFragment? _result;
    private const long StreamLimit = 512L * 1024 * 1024;

    protected override async Task OnInitializedAsync()
    {
        try
        {
            _buckets = (await Client.ListBucketsAsync()).ToList();
            _bucket = _buckets.FirstOrDefault();
        }
        catch (Exception ex)
        {
            Snackbar.Add($"Buckets konnten nicht geladen werden: {ex.Message}", Severity.Error);
        }
    }


    private readonly List<string> _messages = new();

    private async Task OnFilesSelected(InputFileChangeEventArgs e)
    {
        if (string.IsNullOrWhiteSpace(_bucket))
        {
            Snackbar.Add("Bitte zuerst einen Bucket auswählen.", Severity.Warning);
            return;
        }

        foreach (var f in e.GetMultipleFiles())
        {
            try
            {
                await Client.UploadAsync(_bucket!, _path, f, StreamLimit);
                _messages.Add($"hochgeladen: {f.Name} ({f.Size:N0} Bytes)");
            }
            catch (Exception ex)
            {
                _messages.Add($"Fehler bei '{f.Name}': {ex.Message}");
            }
        }
   
    }
}