@using Groceries.Data
@using Microsoft.EntityFrameworkCore

@layout Layout

@inject AppDbContext DbContext
@inject NavigationManager Navigation
@inject IHttpContextAccessor HttpContextAccessor

<PageTitle>Groceries &ndash; Items</PageTitle>

<div class="row">
    <h1 class="row__fill">Items</h1>
    <SearchForm data-turbo-frame="table" data-turbo-action="advance">
        <input type="hidden" name="page" value="1" />
    </SearchForm>
</div>

<turbo-frame id="table" target="top">
    <section class="table">
        <table>
            <thead>
                <tr>
                    <th scope="col" class="table__header table__header--shaded">Brand</th>
                    <th scope="col" class="table__header table__header--shaded" style="width: 100%">Name</th>
                    <th scope="col" class="table__header table__header--shaded">Last Purchased</th>
                    <th scope="col" class="table__header table__header--shaded">Barcode</th>
                    @*<th scope="col" class="table__header table__header--shaded"></th>*@
                </tr>
            </thead>
            <tbody>
                @foreach (var item in items)
                {
                    <tr>
                        <td class="table__cell">@item.Brand</td>
                        <td class="table__cell">@item.Name</td>
                        <td class="table__cell">
                            <time datetime="@item.LastPurchasedAt?.ToString("o")">@item.LastPurchasedAt?.ToLongDateString()</time>
                        </td>
                        <td class="table__cell table__cell--icon" style="width: fit-content">@(item.HasBarcode ? "✓" : "")</td>
                        @*<td class="table__cell">
                            <a class="link" href="/items/edit/@item.Id">Edit</a>
                        </td>*@
                    </tr>
                }
            </tbody>
        </table>
        <TablePaginator Model="items" />
    </section>
</turbo-frame>

@code {
    [SupplyParameterFromQuery]
    public int? Page { get; set; }

    [SupplyParameterFromQuery]
    public string? Search { get; set; }

    private record ItemModel(Guid Id, string Brand, string Name, bool HasBarcode, DateTime? LastPurchasedAt);

    private ListPageModel<ItemModel> items = ListPageModel.Empty<ItemModel>();

    protected override async Task OnParametersSetAsync()
    {
        var itemsQuery = DbContext.Items.AsQueryable();
        if (!string.IsNullOrEmpty(Search))
        {
            var searchPattern = $"%{Search}%";
            itemsQuery = itemsQuery.Where(item => EF.Functions.ILike(item.Brand + ' ' + item.Name, searchPattern));
        }

        items = await itemsQuery
            .OrderBy(item => item.Brand)
            .ThenBy(item => item.Name)
            .GroupJoin(
                DbContext.ItemPurchases.Where(purchase => purchase.IsLastPurchase),
                item => item.Id,
                lastPurchase => lastPurchase.ItemId,
                (item, lastPurchase) => new { item, lastPurchase })
            .SelectMany(
                group => group.lastPurchase.DefaultIfEmpty(),
                (group, lastPurchase) => new ItemModel(
                    group.item.Id,
                    group.item.Brand,
                    group.item.Name,
                    group.item.Barcodes.Count != 0,
                    lastPurchase != null ? lastPurchase.CreatedAt : null))
            .ToListPageModelAsync(Page.GetValueOrDefault(), cancellationToken: HttpContextAccessor.HttpContext!.RequestAborted);

        if (items.Page != Page)
        {
            Navigation.NavigateTo(Navigation.GetUriWithQueryParameter("page", items.Page));
        }
    }
}