using Fake.Application;
using Newtonsoft.Json;
using Oms.Application.Dtos.Orders;
using Oms.Application.Labeling;
using Oms.Application.Services.Orders.Issues;
using Oms.Domain.OrdersAggregate.Consts;
using Oms.Domain.OrdersAggregate.Entities;

namespace Oms.Application.Services.Orders;

public partial class OrderService
{
    internal Task PayForBatchAsync(int orderId, CancellationToken cancellationToken = default) =>
        PayAsync(new OrderActionInput { Id = orderId });

    internal Task PreDeclareForBatchAsync(int orderId, CancellationToken cancellationToken = default) =>
        PreDeclareAsync(new OrderActionInput { Id = orderId });

    internal Task InterceptForBatchAsync(int orderId, CancellationToken cancellationToken = default) =>
        InterceptAsync(new OrderActionInput { Id = orderId });

    internal Task CancelInterceptForBatchAsync(int orderId, CancellationToken cancellationToken = default) =>
        CancelInterceptAsync(new OrderActionInput { Id = orderId });

    internal Task DeleteForBatchAsync(int orderId, CancellationToken cancellationToken = default) =>
        DeleteAsync(new OrderActionInput { Id = orderId });

    internal Task<OrderPrintOutput> PrintForBatchAsync(int orderId, CancellationToken cancellationToken = default) =>
        PrintAsync(new OrderActionInput { Id = orderId });

    internal async Task<LabelPdfGenerateResult> GenerateLabelPdfForBatchAsync(
        int orderId,
        CancellationToken cancellationToken = default)
    {
        var order = await GetOrderOrThrowAsync(orderId);
        var mapped = (await MapOrderOutputsAsync([order])).First();
        return await LabelPdfGenerationService.GenerateAndPersistAsync(
            order,
            mapped,
            templateIdOverride: null,
            operatorName: null,
            operatorUserId: 0,
            cancellationToken);
    }

    internal async Task MarkProblematicForBatchAsync(
        int orderId,
        string? payloadJson,
        int operatorUserId,
        CancellationToken cancellationToken = default)
    {
        var input = DeserializeBatchPayload<OrderMarkProblematicInput>(payloadJson)
            ?? throw new BusinessException("问题件参数无效");
        input.OrderIds = [orderId];

        var payload = await ResolveProblematicPayloadAsync(input);
        var request = new ProblematicMarkRequest
        {
            IssueType = payload.IssueType,
            Title = payload.Title,
            Content = payload.Content,
            IssueTemplateId = payload.IssueTemplateId,
            NotifyMethod = payload.NotifyMethod,
            Remark = payload.Remark,
        };

        var order = await GetOrderOrThrowAsync(orderId);
        var sendNotification = !string.IsNullOrWhiteSpace(request.NotifyMethod);
        var reason = await ExceptionWorkflowService.TryMarkProblematicAsync(
            order,
            request,
            operatorUserId,
            sendNotification);
        if (!string.IsNullOrWhiteSpace(reason))
        {
            throw new BusinessException(reason);
        }
    }

    internal async Task MarkClaimedForBatchAsync(
        int orderId,
        string? payloadJson,
        CancellationToken cancellationToken = default)
    {
        var input = DeserializeBatchPayload<OrderMarkClaimedInput>(payloadJson)
            ?? throw new BusinessException("理赔件参数无效");
        var payload = NormalizeClaimedPayload(input);
        var order = await GetOrderOrThrowAsync(orderId);

        if (!OrderExceptionStatusRules.CanMarkException(order.OrderStatus))
        {
            throw new BusinessException(OrderExceptionStatusRules.GetForbiddenReason(order.OrderStatus));
        }

        var fromStatus = order.OrderStatus;
        order.PreviousOrderStatus = fromStatus;
        order.OrderStatus = OrderStatusCodes.Claimed;
        order.HandleStatus = OrderHandleStatusCodes.Pending;
        order.ClaimType = payload.ClaimType;
        order.ClaimAmount = payload.ClaimAmount;
        order.ClaimCurrency = payload.ClaimCurrency;
        order.ClaimReason = payload.ClaimReason;
        order.ClaimTime = DateTime.Now;
        order.IssueType = null;
        order.IssueTitle = null;
        order.IssueContent = null;
        order.IssueTemplateId = null;
        order.IssueRemark = null;
        order.IssueTime = null;

        await OrderRepository.UpdateAsync(order);
        await OrderExceptionEventRepository.InsertAsync(new OrderExceptionEvent
        {
            OrderId = order.Id,
            EventType = OrderExceptionEventTypeCodes.MarkClaimed,
            FromStatus = fromStatus,
            ToStatus = OrderStatusCodes.Claimed,
            FromHandleStatus = null,
            ToHandleStatus = OrderHandleStatusCodes.Pending,
            ClaimType = payload.ClaimType,
            ClaimAmount = payload.ClaimAmount,
            ClaimCurrency = payload.ClaimCurrency,
            ClaimReason = payload.ClaimReason,
            Remark = payload.Remark,
        });
    }

    internal async Task UpdateHandleStatusForBatchAsync(
        int orderId,
        string? payloadJson,
        CancellationToken cancellationToken = default)
    {
        var input = DeserializeBatchPayload<OrderHandleStatusUpdateInput>(payloadJson)
            ?? throw new BusinessException("处理状态参数无效");
        var targetStatus = input.HandleStatus?.Trim().ToLowerInvariant();
        if (!string.Equals(targetStatus, OrderHandleStatusCodes.Processed, StringComparison.Ordinal))
        {
            throw new BusinessException("仅支持标记为已处理");
        }

        var order = await GetOrderOrThrowAsync(orderId);
        if (order.OrderStatus is not (OrderStatusCodes.Problematic or OrderStatusCodes.Claimed))
        {
            throw new BusinessException("仅问题件或理赔件可更新处理状态");
        }

        if (OrderHandleStatusCodes.IsProcessed(order.HandleStatus))
        {
            throw new BusinessException("订单已处理");
        }

        order.HandleStatus = OrderHandleStatusCodes.Processed;
        await OrderRepository.UpdateAsync(order);
        await OrderExceptionEventRepository.InsertAsync(new OrderExceptionEvent
        {
            OrderId = order.Id,
            EventType = OrderExceptionEventTypeCodes.HandleProcessed,
            FromStatus = order.OrderStatus,
            ToStatus = order.OrderStatus,
            FromHandleStatus = OrderHandleStatusCodes.Pending,
            ToHandleStatus = OrderHandleStatusCodes.Processed,
            Remark = input.Remark?.Trim(),
        });
    }

    private static T? DeserializeBatchPayload<T>(string? payloadJson)
        where T : class
    {
        if (string.IsNullOrWhiteSpace(payloadJson))
        {
            return null;
        }

        return JsonConvert.DeserializeObject<T>(payloadJson);
    }
}