using HtmlToPdfService.Core.Options;
using HtmlToPdfService.Core.Pool;
using HtmlToPdfService.Core.Services;
using HtmlToPdfService.Core.Storage;

var builder = WebApplication.CreateBuilder(args);

// 配置日志
builder.Logging.ClearProviders();
builder.Logging.AddConsole();
builder.Logging.AddDebug();

// 绑定配置选项
builder.Services.Configure<PdfServiceOptions>(
    builder.Configuration.GetSection("PdfService"));

// 注册服务
builder.Services.AddSingleton<IBrowserPool, BrowserPool>();
builder.Services.AddSingleton<IFileStorage, LocalFileStorage>();
builder.Services.AddScoped<IPdfService, PuppeteerPdfService>();
builder.Services.AddScoped<IImageService, PuppeteerImageService>();
builder.Services.AddScoped<ICallbackService, CallbackService>();

// 注册 HttpClient Factory（用于回调）
builder.Services.AddHttpClient("CallbackClient")
    .ConfigureHttpClient(client =>
    {
        client.Timeout = TimeSpan.FromSeconds(30);
    });

// 添加控制器
builder.Services.AddControllers();

// 添加 API 文档
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

// 添加 CORS
builder.Services.AddCors(options =>
{
    options.AddDefaultPolicy(policy =>
    {
        policy.AllowAnyOrigin()
              .AllowAnyMethod()
              .AllowAnyHeader();
    });
});

var app = builder.Build();

// 配置 HTTP 请求管道
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI(options =>
    {
        options.SwaggerEndpoint("/swagger/v1/swagger.json", "HTML to PDF Service API v1");
    });
}

app.UseCors();

app.MapControllers();

// 启动时预热浏览器池
var lifetime = app.Services.GetRequiredService<IHostApplicationLifetime>();
lifetime.ApplicationStarted.Register(async () =>
{
    var logger = app.Services.GetRequiredService<ILogger<Program>>();
    logger.LogInformation("应用程序已启动，开始预热浏览器池...");

    try
    {
        var browserPool = app.Services.GetRequiredService<IBrowserPool>();
        await browserPool.WarmUpAsync();
        logger.LogInformation("浏览器池预热完成");
    }
    catch (Exception ex)
    {
        logger.LogError(ex, "浏览器池预热失败");
    }
});

// 优雅关闭
lifetime.ApplicationStopping.Register(async () =>
{
    var logger = app.Services.GetRequiredService<ILogger<Program>>();
    logger.LogInformation("应用程序正在停止，清理资源...");

    try
    {
        var browserPool = app.Services.GetRequiredService<IBrowserPool>();
        await browserPool.DisposeAsync();
        logger.LogInformation("浏览器池已清理");
    }
    catch (Exception ex)
    {
        logger.LogError(ex, "清理浏览器池时出错");
    }
});

var logger = app.Services.GetRequiredService<ILogger<Program>>();
logger.LogInformation("HTML to PDF Service 已启动");
logger.LogInformation("Swagger UI: http://localhost:5000/swagger");

app.Run();