EmailBill/WebApi/Program.cs

using FreeSql;
using Scalar.AspNetCore;
using Serilog;
using Service.AppSettingModel;
using Yitter.IdGenerator;

// 初始化雪花算法ID生成器
var options = new IdGeneratorOptions(1); // WorkerId 为 1，可根据实际部署情况调整
YitIdHelper.SetIdGenerator(options);

var builder = WebApplication.CreateBuilder(args);

// 配置 Serilog
builder.Host.UseSerilog((context, loggerConfig) =>
{
    loggerConfig.ReadFrom.Configuration(context.Configuration);
});

// Add services to the container.
builder.Services.AddControllers();
builder.Services.AddOpenApi();
builder.Services.AddHttpClient();

// 配置 CORS
builder.Services.AddCors(options =>
{
    options.AddDefaultPolicy(policy =>
    {
        policy.WithOrigins("http://localhost:5173")
              .AllowAnyHeader()
              .AllowAnyMethod();
    });
});

// 绑定配置
builder.Services.Configure<EmailSettings>(builder.Configuration.GetSection("EmailSettings"));
builder.Services.Configure<AISettings>(builder.Configuration.GetSection("OpenAI"));

// 配置 FreeSql + SQLite
var dbPath = Path.Combine(AppContext.BaseDirectory, "database");
if (!Directory.Exists(dbPath))
{
    Directory.CreateDirectory(dbPath);
}

// 使用绝对路径作为数据库文件路径
var dbFilePath = Path.Combine(dbPath, "EmailBill.db");
var connectionString = $"Data Source={dbFilePath}";
Log.Information("数据库路径: {DbPath}", dbFilePath);

var fsql = new FreeSqlBuilder()
    .UseConnectionString(DataType.Sqlite, connectionString)
    .UseAutoSyncStructure(true)
    .UseLazyLoading(true)
    .UseMonitorCommand(
        cmd => 
        {
            Log.Information("执行SQL: {Sql}", cmd.CommandText);
        }
    )
    .Build();

builder.Services.AddSingleton(fsql);

// 自动扫描注册服务和仓储
builder.Services.AddServices();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.MapOpenApi();
    app.MapScalarApiReference();
}

// 启用静态文件服务
app.UseDefaultFiles();
app.UseStaticFiles();

// 启用 CORS
app.UseCors();

app.MapControllers();

// 添加 SPA 回退路由（用于前端路由）
app.MapFallbackToFile("index.html");

// 启动后台邮件抓取服务（必须只注册一次）
app.Lifetime.ApplicationStarted.Register(() =>
{
    try
    {
        if (app.Services.GetRequiredService<IEmailBackgroundService>() is not EmailBackgroundService emailService)
        {
            return;
        }

        // 检查是否已在运行，避免重复启动
        if (!emailService.IsBusy)
        {
            emailService.RunWorkerAsync();
        }
    }
    catch (Exception ex)
    {
        var logger = app.Services.GetRequiredService<ILogger<Program>>();
        logger.LogError(ex, "启动后台服务失败");
    }
});

app.Run();