using Workflow.Application.BuildFlow.Common.Services;

namespace BuildFlow.Workflow.Tests.Performance;

/// <summary>在导出写入阶段触发取消或指定异常，并记录实际输出路径。</summary>
public sealed class CancellingExportExcelService(
    CancellationTokenSource? cancellation = null,
    Exception? exception = null) : IFormSchemaExcelService
{
    /// <summary>handler 传入的临时文件路径。</summary>
    public string? OutputPath { get; private set; }

    public byte[] BuildTemplate(string schemaJson, string formName) => [];

    public IEnumerable<ExcelParsedRow> Parse(
        string schemaJson,
        Stream xlsxStream,
        int maxRows,
        int maxCellTextLength) => [];

    /// <summary>记录路径后触发测试指定的失败。</summary>
    public Task WriteExportAsync(
        string schemaJson,
        string formName,
        IAsyncEnumerable<string> dataJsonRows,
        Stream output,
        CancellationToken ct)
    {
        OutputPath = (output as FileStream)?.Name;
        if (cancellation is not null)
        {
            cancellation.Cancel();
            ct.ThrowIfCancellationRequested();
        }

        throw exception ?? new InvalidOperationException("测试导出写入失败");
    }
}