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

<PageTitle>DMS</PageTitle>

<MudStack Spacing="3">
    <!-- Kopfzeile: Titel, Bucket-Auswahl und Aktionen -->
    <MudStack Row="true" AlignItems=AlignItems.Center Spacing="2">
        <MudText Typo="Typo.h4">Dokumenten-Management</MudText>
        <MudSpacer />
        <MudSelect T="string" @bind-Value="_bucket" Label="Bucket" Dense="true" Style="min-width:240px">
            @foreach (var b in _buckets)
            {
                <MudSelectItem Value="@b">@b</MudSelectItem>
            }
        </MudSelect>
        <MudButton Variant="Variant.Outlined" OnClick="Reload" StartIcon="@Icons.Material.Filled.Refresh">
            Aktualisieren
        </MudButton>
        <MudButton Variant="Variant.Filled" Color="Color.Primary"
                   OnClick="@(() => Nav.NavigateTo("/dms/upload"))"
                   StartIcon="@Icons.Material.Filled.CloudUpload">
            Upload
        </MudButton>
        <MudButton Variant="Variant.Outlined"
                   OnClick="@(() => Nav.NavigateTo("/dms/list"))"
                   StartIcon="@Icons.Material.Filled.List">
            Zur Liste
        </MudButton>
    </MudStack>

    <!-- Kennzahlen -->
    <MudGrid>
        <MudItem xs="12" md="3">
            <MudPaper Class="pa-4">
                <MudText Typo="Typo.subtitle1">Gesamt</MudText>
                <MudText Typo="Typo.h5">@_total.ToString("N0")</MudText>
            </MudPaper>
        </MudItem>
        <MudItem xs="12" md="3">
            <MudPaper Class="pa-4">
                <MudText Typo="Typo.subtitle1">Eingegangen</MudText>
                <MudText Typo="Typo.h5">@_eingegangen.ToString("N0")</MudText>
            </MudPaper>
        </MudItem>
        <MudItem xs="12" md="3">
            <MudPaper Class="pa-4">
                <MudText Typo="Typo.subtitle1">Freigegeben</MudText>
                <MudText Typo="Typo.h5">@_freigegeben.ToString("N0")</MudText>
            </MudPaper>
        </MudItem>
        <MudItem xs="12" md="3">
            <MudPaper Class="pa-4">
                <MudText Typo="Typo.subtitle1">Bezahlt</MudText>
                <MudText Typo="Typo.h5">@_bezahlt.ToString("N0")</MudText>
            </MudPaper>
        </MudItem>
    </MudGrid>

    <!-- Zuletzt hinzugefügt + Filter -->
    <MudPaper Class="pa-4">
        <MudStack Row="true" AlignItems=AlignItems.Center Spacing="2">
            <MudText Typo="Typo.h6">Zuletzt hinzugefügt</MudText>
            <MudSpacer />
            <MudTextField @bind-Value="_query"
                          Placeholder="Suche (optional)"
                          Adornment="Adornment.Start"
                          AdornmentIcon="@Icons.Material.Filled.Search"
                          Immediate="true" />
            <MudTextField @bind-Value="_prefix" Placeholder="Pfad-Prefix (optional, z. B. rechnungen/2026)" />
            <MudButton Variant="Variant.Outlined" OnClick="Reload" StartIcon="@Icons.Material.Filled.Search">
                Filtern
            </MudButton>
        </MudStack>

        <MudTable Items="_latest" Dense="true" Hover="true" Class="mt-3">
            <HeaderContent>
                <MudTh>Datei</MudTh>
                <MudTh>Pfad</MudTh>
                <MudTh>Größe</MudTh>
                <MudTh>Geändert</MudTh>
                <MudTh></MudTh>
            </HeaderContent>
            <RowTemplate>
                <MudTd>@context.FileName</MudTd>
                <MudTd>@context.PathPrefix</MudTd>
                <MudTd>@(context.Size?.ToString("N0"))</MudTd>
                <MudTd>@context.LastModified</MudTd>
                <MudTd Align="TableCellAlign.Right">
                    <MudTooltip Text="Details">
                        <MudIconButton Icon="@Icons.Material.Filled.Description"
                                       OnClick="@(() => Nav.NavigateTo($"/dms/detail/{Uri.EscapeDataString(context.Bucket)}/{EncodeKeyForPath(context.Key)}"))" />
                    </MudTooltip>
                    <MudTooltip Text="Download">
                        <MudIconButton Icon="@Icons.Material.Filled.Download"
                                       OnClick="@(() => Download(context))" />
                    </MudTooltip>
                </MudTd>
            </RowTemplate>
        </MudTable>
    </MudPaper>
</MudStack>

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

    private string? _query;
    private string? _prefix;

    private int _total;
    private int _eingegangen;
    private int _freigegeben;
    private int _bezahlt;

    private List<DocumentListItem> _latest = new();

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

    private async Task Reload()
    {
        if (string.IsNullOrWhiteSpace(_bucket))
        {
            _total = _eingegangen = _freigegeben = _bezahlt = 0;
            _latest = new();
            StateHasChanged();
            return;
        }

        // Kennzahlen: einmal komplette Liste (für kleine Datenmengen ok)
        var (allItems, total) = await Client.SearchAsync(_bucket!, _query, _prefix, 0, int.MaxValue);
        _total = total;

        // Aktuell sind Status nur UI-intern; wenn später persistiert, hier echte Counts laden.
        _eingegangen = allItems.Count(i => i.Status == DocumentStatus.Eingegangen);
        _freigegeben = allItems.Count(i => i.Status == DocumentStatus.Freigegeben);
        _bezahlt = allItems.Count(i => i.Status == DocumentStatus.Bezahlt);

        // Letzte 10
        var (latest, _) = await Client.SearchAsync(_bucket!, _query, _prefix, 0, 10);
        _latest = latest
            .OrderByDescending(i => i.LastModified ?? DateTime.MinValue)
            .Take(10)
            .ToList();

        StateHasChanged();
    }

    private void Download(DocumentListItem item)
    {
        var url = Client.GetDownloadUrl(item.Bucket, item.Key);
        Nav.NavigateTo(url, forceLoad: true);
    }

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