using API.DTO.Warehouse.Request;
using API.DTO.Warehouse.Response;
using FastEndpoints;
using Microsoft.EntityFrameworkCore;
using PyroFetes.Models;

namespace PyroFetes.Endpoints.Warehouse;

public class UpdateWarehouseEndpoint(PyroFetesDbContext db)
    : Endpoint<UpdateWarehouseDto, GetWarehouseDto>
{
    public override void Configure()
    {
        // Utilise {id} plutôt que {@id}
        Put("/api/warehouses/{@id}", x => new { x.Id });
        AllowAnonymous();
    }

    public override async Task HandleAsync(UpdateWarehouseDto req, CancellationToken ct)
    {
        // 🔹 On inclut les produits existants pour pouvoir les modifier
        var warehouseToEdit = await db.Warehouses
            .Include(w => w.WarehouseProducts)
            .SingleOrDefaultAsync(w => w.Id == req.Id, cancellationToken: ct);

        if (warehouseToEdit == null)
        {
            Console.WriteLine($"Aucun entrepôt avec l'ID {req.Id} trouvé.");
            await Send.NotFoundAsync(ct);
            return;
        }

        // 🔹 Mise à jour des champs de base
        warehouseToEdit.Name = req.Name;
        warehouseToEdit.MaxWeight = req.MaxWeight;
        warehouseToEdit.Current = req.Current;
        warehouseToEdit.MinWeight = req.MinWeight;
        warehouseToEdit.Address = req.Adress;
        warehouseToEdit.ZipCode = req.ZipCode;
        warehouseToEdit.City = req.City;

        // 🔹 Gestion des produits associés
        if (req.Products is not null)
        {
            // On supprime les anciens liens pour recréer proprement
            var existingLinks = warehouseToEdit.WarehouseProducts.ToList();
            if (existingLinks.Any())
                db.WarehouseProducts.RemoveRange(existingLinks);

            foreach (var p in req.Products)
            {
                var newLink = new WarehouseProduct
                {
                    WarehouseId = warehouseToEdit.Id,
                    ProductId = p.ProductId,
                    Quantity = p.Quantity
                };
                db.WarehouseProducts.Add(newLink);
            }
        }

        await db.SaveChangesAsync(ct);

        // 🔹 On renvoie la version mise à jour
        var response = new GetWarehouseDto
        {
            Id = warehouseToEdit.Id,
            Name = warehouseToEdit.Name,
            MaxWeight = warehouseToEdit.MaxWeight,
            Current = warehouseToEdit.Current,
            MinWeight = warehouseToEdit.MinWeight,
            Adress = warehouseToEdit.Address,
            ZipCode = warehouseToEdit.ZipCode,
            City = warehouseToEdit.City,
            Products = warehouseToEdit.WarehouseProducts.Select(wp => new WarehouseProductDto
            {
                ProductId = wp.ProductId,
                ProductName = wp.Product?.Name,
                Quantity = wp.Quantity
            }).ToList()
        };

        Console.WriteLine($"Entrepôt {warehouseToEdit.Name} mis à jour avec succès.");
        await Send.OkAsync(response, ct);
    }
}