@page "/dms/detail/{Bucket}/{*Key}"
@using MudBlazor
@using Pldpro.Web.UI.Models
@inject Pldpro.Web.UI.Services.IDocumentClient Client
@inject NavigationManager Nav
@inject IDialogService Dialogs
@inject ISnackbar Snackbar

<PageTitle>Dokument</PageTitle>

@if (_loading)
{
    <MudStack AlignItems=AlignItems.Center Justify=Justify.Center Class="pa-6">
        <MudProgressCircular Indeterminate="true" />
    </MudStack>
}
else if (_doc is null)
{
    <MudPaper Class="pa-4">
        <MudAlert Severity="Severity.Error">
            Dokument nicht gefunden.
        </MudAlert>
        <MudButton Variant="Variant.Outlined" OnClick="Back" Class="mt-3">Zurück</MudButton>
    </MudPaper>
}
else
{
    <MudStack Spacing="2">
        <!-- Kopfzeile -->
        <MudStack Row="true" AlignItems=AlignItems.Center Spacing="2">
            <MudText Typo="Typo.h5">@_doc.FileName</MudText>
            <MudSpacer />
            <MudButton Variant="Variant.Outlined"
                       StartIcon="@Icons.Material.Filled.ArrowBack"
                       OnClick="Back">
                Zurück
            </MudButton>
        </MudStack>

        <MudGrid>
            <!-- Vorschau (Platzhalter) -->
            <MudItem xs="12" md="7">
                <MudPaper Class="pa-3" Elevation="1">
                    <MudText Typo="Typo.subtitle1">Vorschau</MudText>
                    <MudDivider Class="my-2" />
                    <MudAlert Severity="Severity.Info">
                        PDF‑Vorschau Platzhalter – später PDF.js/Viewer integrieren.
                    </MudAlert>
                </MudPaper>
            </MudItem>

            <!-- Details & Aktionen -->
            <MudItem xs="12" md="5">
                <MudPaper Class="pa-3" Elevation="1">
                    <MudText Typo="Typo.subtitle1">Details</MudText>
                    <MudDivider Class="my-2" />

                    <!-- Nicht-generische Tabelle -->
                    <MudSimpleTable Dense="true">
                        <thead>
                            <tr>
                                <th>Feld</th>
                                <th>Wert</th>
                            </tr>
                        </thead>
                        <tbody>
                            <tr><td>Bucket</td><td>@_doc.Bucket</td></tr>
                            <tr><td>Key</td><td>@_doc.Key</td></tr>
                            <tr><td>Dateiname</td><td>@_doc.FileName</td></tr>
                            <tr><td>Pfad</td><td>@_doc.PathPrefix</td></tr>
                            <tr><td>Größe</td><td>@(_doc.Size?.ToString("N0")) Bytes</td></tr>
                            <tr><td>Geändert</td><td>@_doc.LastModified</td></tr>
                        </tbody>
                    </MudSimpleTable>

                    <MudStack Row="true" Spacing="1" Class="mt-3">
                        <MudButton Color="Color.Primary"
                                   Variant="Variant.Filled"
                                   StartIcon="@Icons.Material.Filled.Download"
                                   OnClick="Download">
                            Download
                        </MudButton>

                        <MudButton Color="Color.Error"
                                   Variant="Variant.Text"
                                   StartIcon="@Icons.Material.Filled.Delete"
                                   OnClick="Delete">
                            Löschen
                        </MudButton>
                    </MudStack>
                </MudPaper>
            </MudItem>

        </MudGrid>
    </MudStack>
}

@code {
    [Parameter] public string Bucket { get; set; } = default!;
    [Parameter] public string Key { get; set; } = default!; // Catch-all wird von Blazor decodiert

    private DocumentDetail? _doc;
    private bool _loading;

    protected override async Task OnParametersSetAsync()
    {
        _loading = true;
        try
        {
            _doc = await Client.GetAsync(Bucket, Key);
        }
        catch (Exception ex)
        {
            Snackbar.Add($"Fehler beim Laden: {ex.Message}", Severity.Error);
            _doc = null;
        }
        finally
        {
            _loading = false;
        }
    }

    private void Back() => Nav.NavigateTo("/dms/list");

    private Task Download()
    {
        if (_doc is null) return Task.CompletedTask;
        var url = Client.GetDownloadUrl(_doc.Bucket, _doc.Key);
        Nav.NavigateTo(url, forceLoad: true);
        return Task.CompletedTask;
    }

    private async Task Delete()
    {
        if (_doc is null) return;

        // Du kannst alternativ ShowMessageBox verwenden, wenn du keinen eigenen ConfirmDialog nutzen willst:
        var confirm = await Dialogs.ShowMessageBox(
            title: "Dokument löschen",
            markupMessage: (MarkupString)$"Möchten Sie '<b>{_doc.FileName}</b>' endgültig löschen?",
            yesText: "Löschen",
            cancelText: "Abbrechen",
            options: new DialogOptions { CloseOnEscapeKey = true });

        if (confirm == true)
        {
            try
            {
                await Client.DeleteAsync(_doc.Bucket, _doc.Key);
                Snackbar.Add("Dokument gelöscht.", Severity.Success);
                Nav.NavigateTo("/dms/list");
            }
            catch (Exception ex)
            {
                Snackbar.Add($"Löschen fehlgeschlagen: {ex.Message}", Severity.Error);
            }
        }
    }
}