using System.Net;
using System.Net.Http.Headers;
using System.Net.Http.Json;
using CampusErrand.Data;
using CampusErrand.Models;
using CampusErrand.Models.Dtos;
using FsCheck;
using FsCheck.Xunit;
using Microsoft.AspNetCore.Mvc.Testing;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;

namespace CampusErrand.Tests;

/// <summary>
/// Property 12: 跑腿认证前置检查
/// 对任意未通过跑腿认证的用户，尝试接单时应被拒绝。
/// 已通过认证的用户应允许接单。
/// **Feature: login-and-homepage, Property 12: 跑腿认证前置检查**
///
/// </summary>
public class RunnerCertificationPropertyTests : IDisposable
{
    private const string JwtSecret = "YourSuperSecretKeyForJwtTokenGeneration_AtLeast32Chars!";
    private const string JwtIssuer = "CampusErrand";
    private const string JwtAudience = "CampusErrandApp";

    private readonly List<WebApplicationFactory<Program>> _factories = [];

    private WebApplicationFactory<Program> CreateFactory(string dbName)
    {
        var factory = new WebApplicationFactory<Program>()
            .WithWebHostBuilder(builder =>
            {
                builder.ConfigureServices(services =>
                {
                    var efDescriptors = services
                        .Where(d =>
                            d.ServiceType.FullName?.Contains("EntityFrameworkCore") == true
                            || d.ServiceType == typeof(DbContextOptions<AppDbContext>)
                            || d.ServiceType == typeof(DbContextOptions)
                            || d.ImplementationType?.FullName?.Contains("EntityFrameworkCore") == true)
                        .ToList();
                    foreach (var d in efDescriptors) services.Remove(d);

                    services.AddDbContext<AppDbContext>(options =>
                        options.UseInMemoryDatabase(dbName));
                });
            });
        _factories.Add(factory);
        return factory;
    }

    private static string GenerateUserToken(int userId, string role = "User")
    {
        var key = new Microsoft.IdentityModel.Tokens.SymmetricSecurityKey(
            System.Text.Encoding.UTF8.GetBytes(JwtSecret));
        var credentials = new Microsoft.IdentityModel.Tokens.SigningCredentials(
            key, Microsoft.IdentityModel.Tokens.SecurityAlgorithms.HmacSha256);
        var claims = new[]
        {
            new System.Security.Claims.Claim(System.Security.Claims.ClaimTypes.NameIdentifier, userId.ToString()),
            new System.Security.Claims.Claim(System.Security.Claims.ClaimTypes.Role, role)
        };
        var token = new System.IdentityModel.Tokens.Jwt.JwtSecurityToken(
            issuer: JwtIssuer, audience: JwtAudience, claims: claims,
            expires: DateTime.UtcNow.AddHours(1), signingCredentials: credentials);
        return new System.IdentityModel.Tokens.Jwt.JwtSecurityTokenHandler().WriteToken(token);
    }

    /// <summary>
    /// 准备一个待接单订单和单主用户
    /// </summary>
    private static int SeedOrderAndOwner(AppDbContext db, int ownerId)
    {
        db.Users.Add(new User
        {
            Id = ownerId,
            OpenId = $"owner_{ownerId}",
            Phone = "13900000001",
            Nickname = "单主",
            CreatedAt = DateTime.UtcNow
        });

        var order = new Order
        {
            OrderNo = $"ORD{Guid.NewGuid():N}"[..20],
            OwnerId = ownerId,
            OrderType = OrderType.Pickup,
            Status = OrderStatus.Pending,
            ItemName = "测试物品",
            DeliveryLocation = "测试地点",
            Phone = "13800138000",
            Commission = 5.0m,
            TotalAmount = 5.0m,
            CreatedAt = DateTime.UtcNow
        };
        db.Orders.Add(order);
        db.SaveChanges();
        return order.Id;
    }

    /// <summary>
    /// 属性：未通过跑腿认证的用户接单应被拒绝
    /// </summary>
    [Property(MaxTest = 20)]
    public bool 未认证用户接单被拒绝(PositiveInt seed)
    {
        var dbName = $"cert_no_{Guid.NewGuid()}";
        using var factory = CreateFactory(dbName);

        var runnerId = 10 + (seed.Get % 90);
        var ownerId = runnerId + 100;
        int orderId;

        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();

            orderId = SeedOrderAndOwner(db, ownerId);

            // 创建跑腿用户但不创建认证记录
            db.Users.Add(new User
            {
                Id = runnerId,
                OpenId = $"runner_{runnerId}",
                Phone = "13900000002",
                Nickname = "未认证跑腿",
                Role = UserRole.User,
                IsBanned = false,
                CreatedAt = DateTime.UtcNow
            });
            db.SaveChanges();
        }

        var client = factory.CreateClient();
        client.DefaultRequestHeaders.Authorization =
            new AuthenticationHeaderValue("Bearer", GenerateUserToken(runnerId));

        var response = client.PostAsync($"/api/orders/{orderId}/accept", null).Result;

        // 未认证用户接单应返回 400
        return response.StatusCode == HttpStatusCode.BadRequest;
    }

    /// <summary>
    /// 属性：已通过跑腿认证的用户可以正常接单
    /// </summary>
    [Property(MaxTest = 20)]
    public bool 已认证用户可以接单(PositiveInt seed)
    {
        var dbName = $"cert_yes_{Guid.NewGuid()}";
        using var factory = CreateFactory(dbName);

        var runnerId = 10 + (seed.Get % 90);
        var ownerId = runnerId + 100;
        int orderId;

        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();

            orderId = SeedOrderAndOwner(db, ownerId);

            // 创建已认证的跑腿用户
            db.Users.Add(new User
            {
                Id = runnerId,
                OpenId = $"runner_{runnerId}",
                Phone = "13900000002",
                Nickname = "已认证跑腿",
                Role = UserRole.Runner,
                IsBanned = false,
                CreatedAt = DateTime.UtcNow
            });

            // 创建已通过的认证记录
            db.RunnerCertifications.Add(new RunnerCertification
            {
                UserId = runnerId,
                RealName = "测试跑腿",
                Phone = "13900000002",
                Status = CertificationStatus.Approved,
                CreatedAt = DateTime.UtcNow,
                ReviewedAt = DateTime.UtcNow
            });
            db.SaveChanges();
        }

        var client = factory.CreateClient();
        client.DefaultRequestHeaders.Authorization =
            new AuthenticationHeaderValue("Bearer", GenerateUserToken(runnerId, "Runner"));

        var response = client.PostAsync($"/api/orders/{orderId}/accept", null).Result;

        // 已认证用户接单应返回 200
        return response.StatusCode == HttpStatusCode.OK;
    }

    public void Dispose()
    {
        foreach (var f in _factories) f.Dispose();
        _factories.Clear();
    }
}