using Newtonsoft.Json;
using SmartB2B.Enova.Contracts;
using SmartB2B.Enova.Service.Diagnostics;
using SmartB2B.Enova.Service.Rpc;

namespace SmartB2B.Enova.Service.Orders;

public sealed class PlaceOrderHandler
{
    private readonly IEnovaOrderAdapter _adapter;
    private readonly EnovaAdapterConfiguration _configuration;
    private readonly SemaphoreSlim _orderLock = new(1, 1);

    public PlaceOrderHandler(IEnovaOrderAdapter adapter, EnovaAdapterConfiguration configuration)
    {
        _adapter = adapter;
        _configuration = configuration;
    }

    public async Task<object?> HandleAsync(RpcInvocation invocation, CancellationToken cancellationToken)
    {
        if (!invocation.Contains("currency_iso"))
        {
            throw WampErrorFactory.Create("eu.smartb2b.missing_currency", "Pole currency_iso jest wymagane.");
        }

        var currency = invocation.Get<string>("currency_iso")?.Trim();
        if (!string.Equals(currency, "PLN", StringComparison.OrdinalIgnoreCase))
        {
            throw WampErrorFactory.Create(
                "eu.smartb2b.erp.currency_not_supported",
                $"Waluta '{currency}' nie jest obsługiwana. Wymagana waluta: PLN.",
                new Dictionary<string, object?> { ["currency_iso"] = currency });
        }

        var inputLines = invocation.Get<PlaceOrderLine[]>("lines", []) ?? [];
        var request = new OrderRequest
        {
            CustomerCode = invocation.Get<string>("companyErpId") ?? string.Empty,
            CustomerReference = invocation.Get<string>("purchase_order_number"),
            Notes = invocation.Get<string>("notes"),
            DocumentDefinition = _configuration.DocumentDefinition,
            WarehouseCode = invocation.Get<string>("warehouseErpId") ?? _configuration.DefaultWarehouseCode,
            SaveMode = _configuration.SaveMode,
            Items = inputLines.Select(line => new OrderLineRequest
            {
                ProductCode = line.Symbol ?? string.Empty,
                Quantity = line.Quantity,
                UnitPrice = line.PriceNetto,
                Discount = line.Discount
            }).ToArray()
        };

        var errors = OrderValidator.Validate(request);
        if (errors.Count > 0)
        {
            throw WampErrorFactory.Create(
                "eu.smartb2b.erp.invalid_order_lines",
                string.Join(" | ", errors),
                new Dictionary<string, object?> { ["errors"] = errors });
        }

        ConsoleLogger.Verbose(
            $"ZO: żądanie zweryfikowane; definicja={request.DocumentDefinition}, " +
            $"magazyn={request.WarehouseCode ?? "(standardowy)"}, tryb={request.SaveMode}.");
        ConsoleLogger.Verbose("ZO: oczekiwanie na wyłączną sekcję operacji Enovy.");
        await _orderLock.WaitAsync(cancellationToken).ConfigureAwait(false);
        try
        {
            Console.WriteLine(
                $"Tworzenie ZO: kontrahent={request.CustomerCode}, pozycje={request.Items.Count}, referencja={request.CustomerReference ?? "(brak)"}.");

            OrderResult result;
            try
            {
                ConsoleLogger.Verbose("ZO: przekazanie żądania do adaptera Enovy.");
                result = await Task.Run(() => _adapter.CreateOrder(request), cancellationToken)
                    .ConfigureAwait(false);
            }
            catch (EnovaOperationException exception)
            {
                ConsoleLogger.Error(
                    $"Błąd tworzenia ZO [{exception.ErrorUri}]: {exception.Message}",
                    exception);
                await SentryReporter.CaptureAsync(exception, scope =>
                    {
                        scope.SetTag("rpc.procedure", "eu.smartb2b.place_order");
                        scope.SetTag("wamp.error_uri", exception.ErrorUri);
                    })
                    .ConfigureAwait(false);
                throw WampErrorFactory.FromEnova(exception);
            }

            Console.WriteLine($"Utworzono ZO {result.Number} (ID: {result.Id}).");
            ConsoleLogger.Verbose(
                $"ZO: zapis zakończony; stan={result.SaveMode}, magazyn={result.WarehouseCode}, " +
                $"netto={result.Net}, VAT={result.Vat}, brutto={result.Gross}.");
            return new KeywordResult(new Dictionary<string, object?>
            {
                ["order_erp_id"] = result.Id,
                ["order_erp_symbol"] = result.Number,
                ["value_netto"] = result.Net,
                ["value_brutto"] = result.Gross,
                ["stocks"] = Array.Empty<object>()
            });
        }
        finally
        {
            _orderLock.Release();
            ConsoleLogger.Verbose("ZO: zwolniono wyłączną sekcję operacji Enovy.");
        }
    }
}

public sealed class PlaceOrderLine
{
    [JsonProperty("symbol")]
    public string? Symbol { get; init; }

    [JsonProperty("quantity")]
    public decimal Quantity { get; init; }

    [JsonProperty("price_netto")]
    public decimal PriceNetto { get; init; }

    [JsonProperty("discount")]
    public decimal Discount { get; init; }
}