FootwearTest/FootwearTest/ViewModels/ReportViewModel.cs

using System.Threading.Tasks;
using CommunityToolkit.Mvvm.Input;
using FootwearTest.Models;
using FootwearTest.Services;

namespace FootwearTest.ViewModels;

public partial class ReportViewModel : ViewModelBase
{
    private readonly TestRunRepository _repository;
    private readonly ReportService _reportService;
    private readonly ExcelReportService _excelReportService;

    public ReportViewModel(TestRunRepository repository, ReportService reportService, ExcelReportService excelReportService)
    {
        _repository = repository;
        _reportService = reportService;
        _excelReportService = excelReportService;
        LoadLatestCommand = new AsyncRelayCommand(LoadLatestAsync);
        ExportLatestExcelCommand = new AsyncRelayCommand(ExportLatestExcelAsync);
        _ = LoadLatestAsync();
    }

    public IAsyncRelayCommand LoadLatestCommand { get; }
    public IAsyncRelayCommand ExportLatestExcelCommand { get; }

    private string _reportText = "暂无报告。完成一次试验后会自动生成报告文本。";
    private string _exportStatusText = "Excel 报告将导出到桌面“整鞋试验报告”文件夹。";
    private TestRunRecord? _latestRecord;

    public string ReportText
    {
        get => _reportText;
        set => SetProperty(ref _reportText, value);
    }

    public string ExportStatusText
    {
        get => _exportStatusText;
        set => SetProperty(ref _exportStatusText, value);
    }

    private async Task LoadLatestAsync()
    {
        var record = await _repository.GetLatestAsync();
        _latestRecord = record;
        ReportText = record is null ? "暂无报告。完成一次试验后会自动生成报告文本。" : _reportService.CreateTextReport(record);
        ExportStatusText = record is null ? "暂无可导出的报告。" : "Excel 报告将导出到桌面“整鞋试验报告”文件夹。";
    }

    private async Task ExportLatestExcelAsync()
    {
        var record = _latestRecord ?? await _repository.GetLatestAsync();
        if (record is null)
        {
            ExportStatusText = "暂无可导出的报告。";
            return;
        }

        var path = await _excelReportService.ExportAsync(record);
        ExportStatusText = $"已导出 Excel: {path}";
    }
}