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

namespace CampusErrand.Tests;

/// <summary>
/// Property 17: 跑腿评分计算
/// 对任意评价星级（1-5），分数变化应为：1星 -2, 2星 -1, 3星 0, 4星 +1, 5星 +2。
/// 跑腿总分应等于初始分 80 加上所有未禁用评价的分数变化之和，且总分范围在 0-100 之间。
/// **Feature: login-and-homepage, Property 17: 跑腿评分计算**
///
/// </summary>
public class RunnerScorePropertyTests : 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 GenerateToken(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>
    /// 属性：单次评价的分数变化符合规则（1星 -2, 2星 -1, 3星 0, 4星 +1, 5星 +2）
    /// </summary>
    [Property(MaxTest = 20)]
    public bool 评分变化符合星级规则(PositiveInt seed)
    {
        // 生成 1-5 的星级
        var rating = (seed.Get % 5) + 1;
        var expectedChange = rating - 3;

        var dbName = $"score_single_{Guid.NewGuid()}";
        using var factory = CreateFactory(dbName);

        var ownerId = 100;
        var runnerId = 200;

        // 准备数据
        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
            db.Users.Add(new User { Id = ownerId, OpenId = $"owner_{dbName}", Phone = "13900000001", Nickname = "单主", CreatedAt = DateTime.UtcNow });
            db.Users.Add(new User { Id = runnerId, OpenId = $"runner_{dbName}", Phone = "13900000002", Nickname = "跑腿", Role = UserRole.Runner, RunnerScore = 80, CreatedAt = DateTime.UtcNow });
            db.RunnerCertifications.Add(new RunnerCertification { UserId = runnerId, RealName = "测试", Phone = "13900000002", Status = CertificationStatus.Approved, CreatedAt = DateTime.UtcNow });

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

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

        // 获取订单 ID
        int orderId;
        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
            orderId = db.Orders.First().Id;
        }

        var response = client.PostAsJsonAsync($"/api/orders/{orderId}/review", new { Rating = rating, Content = "测试评价" }).Result;
        if (response.StatusCode != HttpStatusCode.OK) return false;

        // 验证数据库
        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
            var review = db.Reviews.First();
            var runner = db.Users.Find(runnerId)!;

            return review.ScoreChange == expectedChange
                && runner.RunnerScore == 80 + expectedChange;
        }
    }

    /// <summary>
    /// 属性：跑腿总分始终在 0-100 之间
    /// </summary>
    [Property(MaxTest = 20)]
    public bool 跑腿总分在有效范围内(PositiveInt seed)
    {
        var rating = (seed.Get % 5) + 1;

        var dbName = $"score_range_{Guid.NewGuid()}";
        using var factory = CreateFactory(dbName);

        var ownerId = 100;
        var runnerId = 200;
        // 使用极端初始分数来测试边界
        var initialScore = seed.Get % 2 == 0 ? 1 : 99;

        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
            db.Users.Add(new User { Id = ownerId, OpenId = $"owner_{dbName}", Phone = "13900000001", Nickname = "单主", CreatedAt = DateTime.UtcNow });
            db.Users.Add(new User { Id = runnerId, OpenId = $"runner_{dbName}", Phone = "13900000002", Nickname = "跑腿", Role = UserRole.Runner, RunnerScore = initialScore, CreatedAt = DateTime.UtcNow });
            db.RunnerCertifications.Add(new RunnerCertification { UserId = runnerId, RealName = "测试", Phone = "13900000002", Status = CertificationStatus.Approved, CreatedAt = DateTime.UtcNow });

            db.Orders.Add(new Order
            {
                OrderNo = $"ORD{Guid.NewGuid():N}"[..20],
                OwnerId = ownerId, RunnerId = runnerId,
                OrderType = OrderType.Pickup, Status = OrderStatus.Completed,
                ItemName = "测试", DeliveryLocation = "测试地点",
                Phone = "13800138000", Commission = 5.0m, TotalAmount = 5.0m,
                CreatedAt = DateTime.UtcNow, AcceptedAt = DateTime.UtcNow, CompletedAt = DateTime.UtcNow
            });
            db.SaveChanges();
        }

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

        int orderId;
        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
            orderId = db.Orders.First().Id;
        }

        var response = client.PostAsJsonAsync($"/api/orders/{orderId}/review", new { Rating = rating }).Result;
        if (response.StatusCode != HttpStatusCode.OK) return false;

        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
            var runner = db.Users.Find(runnerId)!;
            return runner.RunnerScore >= 0 && runner.RunnerScore <= 100;
        }
    }

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