using System.Text;
using FreeSql;
using F9WebAiTest.Api.Hubs;
using F9WebAiTest.Api.Services;
using F9WebAiTest.Application;
using F9WebAiTest.Application.Services;
using F9WebAiTest.Application.Services.Notice;
using F9WebAiTest.Infrastructure;
using F9WebAiTest.Infrastructure.Data;
using MediatR;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.SignalR;
using Microsoft.IdentityModel.Tokens;

var builder = WebApplication.CreateBuilder(args);

// 分层注册
builder.Services.AddInfrastructure(builder.Configuration);
builder.Services.AddApplication();

// JWT 认证
var jwtKey = builder.Configuration["Jwt:Key"];
builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
    .AddJwtBearer(options =>
    {
        options.TokenValidationParameters = new TokenValidationParameters
        {
            ValidateIssuer = true,
            ValidateAudience = true,
            ValidateLifetime = true,
            ValidateIssuerSigningKey = true,
            ValidIssuer = builder.Configuration["Jwt:Issuer"],
            ValidAudience = builder.Configuration["Jwt:Audience"],
            IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(jwtKey))
        };
        // SignalR 通过 query string 传递 token，需从 access_token 读取
        options.Events = new JwtBearerEvents
        {
            OnMessageReceived = context =>
            {
                var accessToken = context.Request.Query["access_token"];
                if (!string.IsNullOrEmpty(accessToken) && context.HttpContext.Request.Path.StartsWithSegments("/hubs"))
                {
                    context.Token = accessToken;
                }
                return Task.CompletedTask;
            }
        };
    });
builder.Services.AddAuthorization();

builder.Services.AddControllers()
    .AddJsonOptions(options =>
    {
        // long 序列化为字符串，避免雪花 ID 超出 JS 安全整数范围导致精度丢失
        options.JsonSerializerOptions.Converters.Add(new F9WebAiTest.Api.JsonConverters.LongToStringJsonConverter());
    });

// SignalR 实时推送 + 自定义用户标识 + 即时推送器（创建消息时直接推送，无后台投递服务）
builder.Services.AddSignalR();
builder.Services.AddSingleton<IUserIdProvider, NotificationUserIdProvider>();
builder.Services.AddScoped<INotificationPusher, NotificationPusher>();

// 业务状态变更事件 → SignalR 推送（多端状态同步）
builder.Services.AddScoped<INotificationHandler<BusinessChangedEvent>, BusinessChangedEventHandler>();

// CORS
builder.Services.AddCors(options =>
{
    options.AddPolicy("AllowAll", policy =>
        policy.AllowAnyOrigin().AllowAnyHeader().AllowAnyMethod());
});

// NSwag（OpenAPI 文档 + Swagger UI + 可生成 TS/C# 客户端）
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddOpenApiDocument(settings =>
{
    settings.Title = "企业 RBAC 管理系统 API";
    settings.Version = "v1";
    settings.Description = "基于 NSwag 生成的 OpenAPI 文档，可用于生成 TypeScript/C# 客户端";
    settings.AddSecurity("Bearer", new NSwag.OpenApiSecurityScheme
    {
        Type = NSwag.OpenApiSecuritySchemeType.Http,
        Scheme = "bearer",
        BearerFormat = "JWT",
        Description = "请输入 access token（格式：Bearer {token}）"
    });
    settings.OperationProcessors.Add(new NSwag.Generation.Processors.Security.AspNetCoreOperationSecurityScopeProcessor("Bearer"));
});

var app = builder.Build();

// 初始化数据库（FreeSql CodeFirst 建表 + 种子）
using (var scope = app.Services.CreateScope())
{
    var fsql = scope.ServiceProvider.GetRequiredService<IFreeSql>();
    var snowflake = scope.ServiceProvider.GetRequiredService<F9WebAiTest.Application.Interfaces.SnowflakeID.ISnowflakeIdGenerator>();
    DbSeeder.Seed(fsql, snowflake);
}

// NSwag 中间件（swagger 文档 + UI）
app.UseOpenApi();
app.UseSwaggerUi();

app.UseCors("AllowAll");
app.UseAuthentication();
app.UseAuthorization();

app.MapControllers();
app.MapHub<NotificationHub>("/hubs/notification");

app.Run();