@page "/dms/list"
@using MudBlazor
@using Pldpro.Web.UI.Models
@inject Pldpro.Web.UI.Services.IDocumentClient Client
@inject NavigationManager Nav

<MudPaper Class="pa-4">
    <MudStack Row="true" Spacing="2" AlignItems=AlignItems.Center>
        <MudSelect T="string" @bind-Value="_bucket" Label="Bucket" Dense="true" Style="min-width:220px" Required="true">
            @foreach (var b in _buckets)
            {
                <MudSelectItem Value="@b">@b</MudSelectItem>
            }
        </MudSelect>
        <MudTextField @bind-Value="_prefix" Placeholder="Pfad-Prefix (optional, z. B. rechnungen/2026)" />
        <MudTextField @bind-Value="_query" Placeholder="Suche (Datei/Ordner)"
                      Adornment="Adornment.Start" AdornmentIcon="@Icons.Material.Filled.Search" Immediate="true" />
        <MudSpacer />
        <MudButton Variant="Variant.Outlined" OnClick="Reload" StartIcon="@Icons.Material.Filled.Search">Suchen</MudButton>
        <MudButton Variant="Variant.Filled" OnClick="@(() => Nav.NavigateTo("/dms/upload"))"
                   StartIcon="@Icons.Material.Filled.CloudUpload">Upload</MudButton>
    </MudStack>

    <!-- WICHTIG: T="DocumentListItem" angeben -->
    <MudTable T="DocumentListItem" Items="_items" Dense="true" Hover="true" Class="mt-3">
        <HeaderContent>
            <MudTh>Datei</MudTh>
            <MudTh>Bucket</MudTh>
            <MudTh>Pfad</MudTh>
            <MudTh>Größe</MudTh>
            <MudTh>Geändert</MudTh>
            <MudTh></MudTh>
        </HeaderContent>

        <!-- @context ist vom Typ DocumentListItem -->
        <RowTemplate>
            <MudTd DataLabel="Datei">@context.FileName</MudTd>
            <MudTd DataLabel="Bucket">@context.Bucket</MudTd>
            <MudTd DataLabel="Pfad">@context.PathPrefix</MudTd>
            <MudTd DataLabel="Größe">@context.Size?.ToString("N0")</MudTd>
            <MudTd DataLabel="Geändert">@context.LastModified</MudTd>
            <MudTd Align="TableCellAlign.Right">
                <MudButton Variant="Variant.Text"
                           OnClick="@(() => Nav.NavigateTo($"/dms/detail/{Uri.EscapeDataString(context.Bucket)}/{EncodeKeyForPath(context.Key)}"))">
                    Details
                </MudButton>
            </MudTd>
        </RowTemplate>

        <PagerContent>
            <MudTablePager PageSizeOptions="new int[] { 10, 25, 50 }" @bind-PageSize="_pageSize" />
        </PagerContent>
    </MudTable>

    <MudStack Row="true" Spacing="1" AlignItems=AlignItems.Center Justify=Justify.Center Class="mt-2">
        <MudButton Variant="Variant.Outlined" Disabled="@(_page == 0)" OnClick="Prev">Zurück</MudButton>
        <MudText>Seite @(_page + 1)</MudText>
        <MudButton Variant="Variant.Outlined" Disabled="@(((_page + 1) * _pageSize) >= _total)" OnClick="Next">Weiter</MudButton>
    </MudStack>
</MudPaper>

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

    private int _page = 0, _pageSize = 25, _total = 0;
    private List<DocumentListItem> _items = new();

    protected override async Task OnInitializedAsync()
    {
        _buckets = (await Client.ListBucketsAsync()).ToList();
        _bucket = _buckets.FirstOrDefault();
        if (!string.IsNullOrWhiteSpace(_bucket))
            await Reload();
    }

    private async Task Reload()
    {
        if (string.IsNullOrWhiteSpace(_bucket)) return;
        var (items, total) = await Client.SearchAsync(_bucket!, _query, _prefix, _page, _pageSize);
        _items = items.ToList();       // <- Items ist List<DocumentListItem>
        _total = total;
    }

    private async Task Prev() { if (_page > 0) { _page--; await Reload(); } }
    private async Task Next() { if (((_page + 1) * _pageSize) < _total) { _page++; await Reload(); } }

    private static string EncodeKeyForPath(string key)
        => string.Join("/", (key ?? string.Empty)
            .Split('/', StringSplitOptions.RemoveEmptyEntries)
            .Select(Uri.EscapeDataString));
}