using Sharp.NetServer;
using NetServer.Test.Examples.Controllers;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.DependencyInjection;

namespace NetServer.Test.Examples;

/// <summary>
/// 完整的使用示例程序
/// 演示如何使用 Sharp.NetServer 框架构建 RESTful API
/// </summary>
public class ExampleProgram
{
    public static void Main(string[] args)
    {
        Console.WriteLine("=============================================");
        Console.WriteLine("  Sharp.NetServer 完整示例");
        Console.WriteLine("=============================================");
        Console.WriteLine();
        Console.WriteLine("这个示例展示了一个完整的 RESTful API 服务器");
        Console.WriteLine("包含用户管理、产品管理和认证功能");
        Console.WriteLine();

        // 创建服务器构建器
        var builder = new HttpServerBuilder();

        // 配置监听地址
        var port = args.Length > 0 && int.TryParse(args[0], out var p) ? p : 5000;
        builder.UseUrls($"http://localhost:{port}/");

        // 添加控制器（从当前程序集）
        builder.AddControllers(typeof(ExampleProgram).Assembly);

        // 配置 CORS - 允许跨域访问
        builder.UseCors(options =>
        {
            options.AllowAnyOrigin = true; // 生产环境应限制来源
            options.AllowedMethods = new[] { "GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS" };
            options.AllowedHeaders = new[] { "Content-Type", "Authorization", "X-Requested-With" };
            options.AllowCredentials = false; // AllowAnyOrigin=true 时必须为 false
        });

        // 启用认证和授权
        builder.UseAuthentication();
        builder.UseAuthorization();

        // 配置服务 - 注册认证提供者
        builder.ConfigureServices(services =>
        {
            services
                .AddSingleton<Sharp.NetServer.Abstractions.IAuthenticationProvider, SimpleAuthenticationProvider>();
        });

        // 启用限流 - 防止滥用
        builder.UseRateLimit();

        // 启用响应缓存 - 提高性能
        builder.UseResponseCache();

        // 配置日志
        builder.ConfigureLogging(services =>
        {
            services.AddLogging(logging =>
            {
                logging.AddConsole();
                logging.SetMinimumLevel(LogLevel.Information);
                logging.AddFilter("Microsoft", LogLevel.Warning); // 减少 Microsoft 库的日志
            });
        });

        // 添加自定义中间件 - 请求计时
        builder.UseMiddleware(next => async context =>
        {
            var startTime = DateTime.UtcNow;
            var path = context.Request.RawUrl;

            await next(context);

            var duration = (DateTime.UtcNow - startTime).TotalMilliseconds;
            if (duration > 100) // 慢请求警告
            {
                Console.ForegroundColor = ConsoleColor.Yellow;
                Console.WriteLine($"[SLOW] {path} took {duration:F2}ms");
                Console.ResetColor();
            }
        });

        // 构建服务器
        var server = builder.Build();

        Console.WriteLine("正在启动服务器...");
        Console.WriteLine();

        // 在后台启动服务器
        var cts = new CancellationTokenSource();
        _ = Task.Run(async () =>
        {
            try
            {
                await server.StartAsync(cts.Token);
            }
            catch (Exception ex)
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine($"服务器错误: {ex.Message}");
                Console.ResetColor();
            }
        }, cts.Token);

        // 等待服务器启动
        Thread.Sleep(1000);

        Console.ForegroundColor = ConsoleColor.Green;
        Console.WriteLine("✓ 服务器启动成功！");
        Console.ResetColor();
        Console.WriteLine();
        Console.WriteLine($"监听地址: http://localhost:{port}/");
        Console.WriteLine();

        PrintApiEndpoints(port);
        PrintExampleRequests(port);

        Console.WriteLine();
        Console.ForegroundColor = ConsoleColor.Cyan;
        Console.WriteLine("按任意键停止服务器...");
        Console.ResetColor();
        Console.ReadKey();

        Console.WriteLine();
        Console.WriteLine("正在停止服务器...");
        cts.Cancel();
        server.Stop();

        Console.ForegroundColor = ConsoleColor.Green;
        Console.WriteLine("✓ 服务器已停止");
        Console.ResetColor();
    }

    private static void PrintApiEndpoints(int port)
    {
        Console.WriteLine("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");
        Console.WriteLine("可用的 API 端点：");
        Console.WriteLine("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");
        Console.WriteLine();

        Console.ForegroundColor = ConsoleColor.Yellow;
        Console.WriteLine("【认证接口】");
        Console.ResetColor();
        Console.WriteLine($"  POST   http://localhost:{port}/api/auth/login");
        Console.WriteLine($"  POST   http://localhost:{port}/api/auth/logout");
        Console.WriteLine($"  GET    http://localhost:{port}/api/auth/me");
        Console.WriteLine($"  POST   http://localhost:{port}/api/auth/change-password");
        Console.WriteLine();

        Console.ForegroundColor = ConsoleColor.Yellow;
        Console.WriteLine("【用户管理】");
        Console.ResetColor();
        Console.WriteLine($"  GET    http://localhost:{port}/api/users");
        Console.WriteLine($"  GET    http://localhost:{port}/api/users/{{id}}");
        Console.WriteLine($"  POST   http://localhost:{port}/api/users");
        Console.WriteLine($"  PUT    http://localhost:{port}/api/users/{{id}}");
        Console.WriteLine($"  DELETE http://localhost:{port}/api/users/{{id}}");
        Console.WriteLine($"  GET    http://localhost:{port}/api/users/search?keyword=张");
        Console.WriteLine();

        Console.ForegroundColor = ConsoleColor.Yellow;
        Console.WriteLine("【产品管理】");
        Console.ResetColor();
        Console.WriteLine($"  GET    http://localhost:{port}/api/products");
        Console.WriteLine($"  GET    http://localhost:{port}/api/products/{{id}}");
        Console.WriteLine($"  POST   http://localhost:{port}/api/products");
        Console.WriteLine($"  PATCH  http://localhost:{port}/api/products/{{id}}/stock");
        Console.WriteLine($"  DELETE http://localhost:{port}/api/products/{{id}}");
        Console.WriteLine($"  GET    http://localhost:{port}/api/products/search?q=键盘");
        Console.WriteLine();
    }

    private static void PrintExampleRequests(int port)
    {
        Console.WriteLine("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");
        Console.WriteLine("示例请求（可以使用 curl 或 Postman 测试）：");
        Console.WriteLine("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");
        Console.WriteLine();

        Console.ForegroundColor = ConsoleColor.Cyan;
        Console.WriteLine("1. 用户登录（获取 Token）:");
        Console.ResetColor();
        Console.WriteLine($"   curl -X POST http://localhost:{port}/api/auth/login \\");
        Console.WriteLine($"        -H \"Content-Type: application/json\" \\");
        Console.WriteLine($"        -d '{{\"username\":\"admin\",\"password\":\"admin123\"}}'");
        Console.WriteLine();

        Console.ForegroundColor = ConsoleColor.Cyan;
        Console.WriteLine("2. 获取所有产品（无需认证）:");
        Console.ResetColor();
        Console.WriteLine($"   curl http://localhost:{port}/api/products");
        Console.WriteLine();

        Console.ForegroundColor = ConsoleColor.Cyan;
        Console.WriteLine("3. 搜索用户（无需认证）:");
        Console.ResetColor();
        Console.WriteLine($"   curl http://localhost:{port}/api/users/search?keyword=张");
        Console.WriteLine();

        Console.ForegroundColor = ConsoleColor.Cyan;
        Console.WriteLine("4. 获取用户信息（需要认证）:");
        Console.ResetColor();
        Console.WriteLine($"   curl http://localhost:{port}/api/users/1 \\");
        Console.WriteLine($"        -H \"Authorization: Bearer YOUR_TOKEN\"");
        Console.WriteLine();

        Console.ForegroundColor = ConsoleColor.Cyan;
        Console.WriteLine("5. 创建产品（需要 Admin 角色）:");
        Console.ResetColor();
        Console.WriteLine($"   curl -X POST http://localhost:{port}/api/products \\");
        Console.WriteLine($"        -H \"Content-Type: application/json\" \\");
        Console.WriteLine($"        -H \"Authorization: Bearer YOUR_TOKEN\" \\");
        Console.WriteLine($"        -d '{{\"name\":\"新产品\",\"price\":299,\"stock\":50,\"category\":\"测试\"}}'");
        Console.WriteLine();

        Console.ForegroundColor = ConsoleColor.Yellow;
        Console.WriteLine("💡 提示:");
        Console.ResetColor();
        Console.WriteLine("   - 默认管理员账号: admin / admin123");
        Console.WriteLine("   - 默认普通用户: user / user123");
        Console.WriteLine("   - Token 有效期: 1小时");
        Console.WriteLine("   - 某些接口有限流保护");
    }
}