@page "/stock/expeditions/create"
@using Blazored.Typeahead
@using Domain.Dtos.Stock
@using Domain.Entities
@using Services.Lookups
@using Services.Stock.Expeditions

@using phronCare.UIBlazor.Pages.Stock.Shared

@inject NavigationManager Navigation
@inject ExpeditionService expeditionService
@inject ISalesLookupService lookUpService
@inject IToastService toastService
@inject IModalService Modal

<EditForm Model="Model" OnValidSubmit="HandleValidSubmit">
    <DataAnnotationsValidator />
    <ValidationSummary />

    <div class="card mt-4" style="zoom:80%">
        <div class="card-header d-flex justify-content-center align-items-center">
            <h3 class="card-title m-0">Nueva Expedición</h3>
        </div>

        <div class="card-body">
            <div class="row mb-3">
                <div class="col-md-6">
                    <label class="form-label">Presupuesto aprobado</label>
                    <BlazoredTypeahead id="quotes" TItem="ELookUpItem" TValue="ELookUpItem"
                                       SearchMethod="SearchQuotes"
                                       Value="SelectedQuote"
                                       ValueChanged="OnQuoteSelected"
                                       ValueExpression="@(() => SelectedQuote)"
                                       MaximumSuggestions="10"
                                       Placeholder="Buscar presupuesto aprobado..."
                                       TextProperty="Nombre">
                        <ResultTemplate Context="item">
                            @item.Nombre
                        </ResultTemplate>
                        <SelectedTemplate Context="item">
                            @item.Nombre
                        </SelectedTemplate>
                    </BlazoredTypeahead>
                </div>
                <div class="col-md-6">
                    <label class="form-label">Ticket ID</label>
                    <InputText class="form-control" @bind-Value="ticketIdString" @bind-Value:event="oninput" />
                </div>
            </div>

            <div class="row mb-3">
                <div class="col-md-4">
                    <label class="form-label">Profesional</label>
                    <InputText class="form-control" @bind-Value="ExtraInfo.Professional" />
                </div>
                <div class="col-md-4">
                    <label class="form-label">Institución</label>
                    <InputText class="form-control" @bind-Value="ExtraInfo.Institution" />
                </div>
                <div class="col-md-4">
                    <label class="form-label">Paciente</label>
                    <InputText class="form-control" @bind-Value="ExtraInfo.Patient" />
                </div>
            </div>

            <div class="row mb-3">
                <div class="col-md-4">
                    <label class="form-label">Fecha de Cirugía</label>
                    <InputDate class="form-control" @bind-Value="ExtraInfo.SurgeryDate" />
                </div>
                <div class="col-md-8">
                    <label class="form-label">Observaciones</label>
                    <InputTextArea class="form-control" @bind-Value="Model.Observations" />
                </div>
            </div>

            @if (!string.IsNullOrWhiteSpace(DispatchInstruction))
            {
                <div class="alert alert-info">
                    <strong>Instrucciones desde presupuesto:</strong><br />
                    @DispatchInstruction
                </div>
            }
        </div>
    </div>

    <div class="card mt-3" style="zoom:90%">
        <div class="card-header d-flex justify-content-between align-items-center">
            <h5 class="card-title m-0">Productos a Expedir</h5>
            <div class="btn-group">
                <button class="btn btn-dark btn-sm" title="Agregar producto" @onclick="OpenStockItemSelectorModal">
                    <i class="fas fa-box"></i> Producto
                </button>
                <button class="btn btn-dark btn-sm" title="Agregar set">
                    <i class="fas fa-th-large"></i> Set-Box
                </button>
                <button class="btn btn-dark btn-sm" title="Escanear producto">
                    <i class="fas fa-barcode"></i> Scanner
                </button>
            </div>
        </div>

        <div class="card-body p-2">
            @if (Details.Any())
            {
                <div class="expedition-table-wrap">
                    <table class="table table-sm table-bordered expedition-table">
                        <thead class="table-light">
                            <tr>
                                <th>Producto</th>
                                <th>Cant.</th>
                                <th>Lote</th>
                                <th>Serial</th>
                                <th>Vencimiento</th>
                                <th>Ubicación</th>
                                <th style="width: 40px;"></th>
                            </tr>
                        </thead>
                        <tbody>
                            @foreach (var item in Details)
                            {
                                <tr>
                                    <td>@item.ProductId</td>
                                    <td>@item.Quantity</td>
                                    <td>@item.Batch</td>
                                    <td>@item.Serial</td>
                                    <td>@item.Expiration?.ToString("yyyy-MM-dd")</td>
                                    <td>@item.LocationId</td>
                                    <td>
                                        <button class="btn btn-link p-0" style="color: red;" title="Eliminar" @onclick="() => RemoveItem(item)">
                                            <i class="fas fa-trash"></i>
                                        </button>
                                    </td>
                                </tr>
                            }
                        </tbody>
                    </table>
                </div>
            }
            else
            {
                <p class="text-muted">No hay productos agregados.</p>
            }
        </div>
    </div>

    <div class="mt-3 d-flex justify-content-end">
        <button type="submit" class="btn btn-primary">Guardar Expedición</button>
    </div>
</EditForm>

@code {
    private ELSExpeditionHeader Model = new();
    private ExtraInfoModel ExtraInfo = new();
    private ELookUpItem? SelectedQuote;

    private List<ELSExpeditionDetail> Details = new();
    private List<ProductSetItemDto> ProductSetItems = new();

    private string DispatchInstruction = string.Empty;

    private string ticketIdString
    {
        get => Model.TicketId?.ToString() ?? string.Empty;
        set => Model.TicketId = Guid.TryParse(value, out var guid) ? guid : null;
    }

    private async Task<IEnumerable<ELookUpItem>> SearchQuotes(string filter)
    {
        return await lookUpService.SearchApprovedQuotesAsync(filter);
    }

    private async Task OnQuoteSelected(ELookUpItem? selected)
    {
        if (selected is null || string.IsNullOrWhiteSpace(selected.Nombre))
        {
            SelectedQuote = null;
            ExtraInfo = new(); // Limpiar datos cargados
            DispatchInstruction = "";
            return;
        }

        SelectedQuote = selected;

        var quoteNumber = selected.Nombre.Split(" - ")[0];
        var quote = await expeditionService.GetQuoteByNumberAsync(quoteNumber);

        if (quote is null)
        {
            toastService.ShowError("No se pudo cargar el presupuesto.");
            return;
        }

        ExtraInfo.Professional = quote.ProfessionalName;
        ExtraInfo.Institution = quote.InstitutionName;
        ExtraInfo.Patient = quote.PatientName;
        ExtraInfo.SurgeryDate = quote.EstimatedDate;
        DispatchInstruction = quote.Observations ?? "";
    }

    private void AddProduct()
    {
        // TODO: abrir modal de producto individual
    }

    private void AddSet()
    {
        // TODO: abrir modal de set
    }

    private void ScanProduct()
    {
        // TODO: activar input de escáner
    }

    private void RemoveItem(ELSExpeditionDetail item)
    {
        Details.Remove(item);
    }

    private async Task HandleValidSubmit()
    {
        // TODO: Lógica de guardado de la expedición completa
    }

    private async Task OpenStockItemSelectorModal()
    {
        var parameters = new ModalParameters();
        parameters.Add(nameof(StockItemSelectorModal.SetItems), ProductSetItems);
        parameters.Add(nameof(StockItemSelectorModal.Snapshot), BuildSnapshotFromDetails()); // ← clave

        var options = new ModalOptions { Size = ModalSize.Large, HideHeader = true };
        var modal = Modal.Show<StockItemSelectorModal>("", parameters, options);

        var result = await modal.Result;

        if (!result.Cancelled && result.Data is List<StockItemSelectionDto> selectedItems)
        {
            MergeSelectionsByBusinessKey(selectedItems);   // ← usar merge (ver abajo)
            StateHasChanged();
            toastService.ShowSuccess($"{selectedItems.Count} item(s) agregados/actualizados.");
        }
    }

    private void MergeSelectionsByBusinessKey(List<StockItemSelectionDto> selected)
    {
        foreach (var s in selected)
        {
            var exp = s.Expiration.HasValue ? DateOnly.FromDateTime(s.Expiration.Value) : (DateOnly?)null;

            var key = StockKeys.BuildBusinessKey(
                s.ProductId,
                s.LocationId,
                s.Batch ?? string.Empty,
                exp,
                s.Serial ?? string.Empty
            );

            var existing = Details.FirstOrDefault(d =>
                StockKeys.BuildBusinessKey(d.ProductId, d.LocationId, d.Batch ?? string.Empty, d.Expiration, d.Serial ?? string.Empty) == key
            );

            var newQty = s.Quantity < 0 ? 0 : s.Quantity;

            // Serial ⇒ siempre 1
            if (!string.IsNullOrWhiteSpace(s.Serial))
                newQty = 1;

            if (existing is not null)
            {
                if (newQty == 0)
                {
                    if (existing.Quantity > 0)
                    {
                        // ⚠️ Caso snapshot con 0 → ignorar, mantener la fila
                        continue;
                    }

                    // 0 explícito válido → borrar
                    Details.Remove(existing);
                }
                else
                {
                    // SET: exactamente lo que vino del modal
                    existing.Quantity = newQty;
                    existing.ProductName = s.ProductName;
                    existing.Batch = s.Batch;
                    existing.Serial = s.Serial;
                    existing.Expiration = exp;
                    existing.LocationId = s.LocationId;
                    existing.TraceabilityType = s.TraceabilityType;
                }
            }
            else
            {
                if (newQty > 0)
                {
                    Details.Add(new ELSExpeditionDetail
                    {
                        ProductId = s.ProductId,
                        ProductName = s.ProductName,
                        Quantity = newQty,
                        Batch = s.Batch,
                        Expiration = exp,
                        TraceabilityType = s.TraceabilityType,
                        Serial = s.Serial,
                        LocationId = s.LocationId
                    });
                }
            }
        }
    }

    private class ExtraInfoModel
    {
        public string? Professional { get; set; }
        public string? Institution { get; set; }
        public string? Patient { get; set; }
        public DateTime? SurgeryDate { get; set; }
    }

    private List<StockSnapshotItem> BuildSnapshotFromDetails()
    {
        return Details.Select(d =>
        {
            var key = StockKeys.BuildBusinessKey(
                d.ProductId,
                d.LocationId,
                d.Batch ?? string.Empty,
                d.Expiration,
                d.Serial ?? string.Empty
            );

            return new StockSnapshotItem
            {
                ProductId = d.ProductId,
                ProductName = d.ProductName,
                LocationId = d.LocationId,
                Batch = d.Batch ?? string.Empty,
                Expiration = d.Expiration,
                Serial = d.Serial ?? string.Empty,
                TraceabilityType = d.TraceabilityType, // UI only (no DB)
                Quantity = d.Quantity,
                BusinessKey = key
            };
        }).ToList();
    }
}