using Apimanager_backend.Config;
using Apimanager_backend.Data;
using Apimanager_backend.Dtos;
using Apimanager_backend.Filters;
using Apimanager_backend.Filters.ExceptionFilter;
using Apimanager_backend.Services;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.FileProviders;
using Serilog;
using Serilog.Sinks.MariaDB.Extensions;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

IConfiguration configuration = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
            .Build();
string? redStr = configuration["Redis:ConnectionString"];
string? constr = configuration.GetConnectionString("DefaultConnection");
//日志服务
/*
Log.Logger = new LoggerConfiguration()
    .MinimumLevel.Debug()
    .WriteTo.Console()
    .WriteTo.MariaDB(
        connectionString: constr,
        tableName: "Logs",
        autoCreateTable:true
    ).CreateLogger();
builder.Host.UseSerilog();
*/
builder.Services.AddDbContext<ApiContext>(option =>
option.UseMySql(constr, MySqlServerVersion.AutoDetect(constr))
);
builder.Services.AddAllService(configuration);
builder.Services.AddControllers(options =>
{
    //模型验证
    options.Filters.Add<ModelValidationFilter>();
    //Exception过滤器
    options.Filters.Add<generalExceptionFilter>();
}).ConfigureApiBehaviorOptions(option =>
{
    option.SuppressModelStateInvalidFilter = true;
})
.AddJsonOptions(options =>
{
    options.JsonSerializerOptions.MaxDepth = 64;
});

// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
var app = builder.Build();

app.Use(async (ctx, next) =>
{
    var controller = ctx.Request.RouteValues["controller"]?.ToString(); // YourController
    var action = ctx.Request.RouteValues["action"]?.ToString();
    if (controller != "Public" || action != "Invoke")
    {
        await next();
        return;
    }
    if (ctx.Request.Headers.TryGetValue("Authorization", out var hdr) &&
        hdr.ToString().StartsWith("Bearer "))
    {
        var token = hdr.ToString().Substring("Bearer ".Length).Trim();
        var code = ctx.Request.RouteValues["code"]!.ToString()!;
        RateLimiterDto rateLimiterDto = new RateLimiterDto();
        var userService = ctx.RequestServices.GetRequiredService<IUserService>();
        var apiService = ctx.RequestServices.GetRequiredService<IApiService>();
        var apiPackageItemService = ctx.RequestServices.GetRequiredService<IApiPackageItemService>();
        var userPackageService = ctx.RequestServices.GetRequiredService<IUserPackageService>();
        var user = await userService.GetByTokenAsync(token);
        var api = await apiService.GetApiInfoByEndpointAsync(code);
        var apiPackages = await apiPackageItemService.GetApiPackageItemsByApiIdAsync(api.Id);
        
        if (user == null || apiPackages.Count == 0)
        {
            ctx.Items["rateLimit"] = null;
        }
        else
        {
            var userPackages = await userPackageService.GetUserPackagesByUserIdAsync(user.Id);
            if (userPackages.Count == 0)
            {
                ctx.Items["rateLimit"] = null;
            }
            // 提取 list2 中的所有 package.id，变成 HashSet 提高查找效率
            var apipackage1 = new HashSet<int>(apiPackages.Select(x => x.ApiPackage.Id));


            var uPackages = userPackages
                .Where(x => apipackage1.Contains(x.Package.Id)).ToList();
            // 从 list1 中筛选出 user.id 存在于 list2 的项
            var commonPackages = uPackages
                .Select(x => x.Package)
                .ToList();
            var package = commonPackages.Count > 0 ? commonPackages.MaxBy(x => x.OneMinuteLimit) : null;
            var data = package == null ? null : new RateLimiterDto()
            {
                UserId = user.Id,
                RateLimit = package.OneMinuteLimit
            };
            ctx.Items["rateLimit"] = data;
            ctx.Items["userPackages"] = uPackages;
        }
    }
    else
    {
        ctx.Items["rateLimit"] = null;
    }
    if (ctx.Items["rateLimit"] == null)
    {
        ctx.Response.StatusCode = 429;
        ctx.Response.ContentType = "application/json";
        await ctx.Response.WriteAsJsonAsync(new ResponseBase<object>()
        {
            Code = 3003,
            Data = null,
            Message = "未授权或访问频率受限"
        });
        return; // ⛔ 不调用 next()，请求终止
    }
    await next();
    return;
});

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

//app.UseHttpsRedirection();

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

app.UseRateLimiter();
/*
app.Use(async (context, next) =>
{
    var controller = context.Request.RouteValues["controller"]?.ToString(); // YourController
    var action = context.Request.RouteValues["action"]?.ToString();     // Invoke
    var code = context.Request.RouteValues["code"]?.ToString();       // ← 就是你要的 GetUserList

    Console.WriteLine($"控制器: {controller}, 实际方法: {code}（映射到 Invoke）");

    // 你可以根据 code 设置速率限制策略、权限校验等

    await next();
});
*/

app.UseStaticFiles(new StaticFileOptions
{
    FileProvider = new PhysicalFileProvider(
        Path.Combine(Directory.GetCurrentDirectory(), "uploads")),
    RequestPath = "/uploads"
});

app.MapControllers();

app.Run();