using System.Net;
using System.Net.Http.Headers;
using System.Net.Http.Json;
using System.Text.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 18: 评价可见性
/// 对任意 API 请求，当请求者为跑腿用户时，评价内容不应被返回；仅管理员可查看评价内容。
/// **Feature: login-and-homepage, Property 18: 评价可见性**
///
/// </summary>
public class ReviewVisibilityPropertyTests : 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>
    /// 准备含评价的数据
    /// </summary>
    private void SeedReviewData(WebApplicationFactory<Program> factory, string suffix)
    {
        using var scope = factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();

        var owner = new User { Id = 100, OpenId = $"owner_{suffix}", Phone = "13900000001", Nickname = "单主", CreatedAt = DateTime.UtcNow };
        var runner = new User { Id = 200, OpenId = $"runner_{suffix}", Phone = "13900000002", Nickname = "跑腿", Role = UserRole.Runner, RunnerScore = 80, CreatedAt = DateTime.UtcNow };
        var admin = new User { Id = 300, OpenId = $"admin_{suffix}", Phone = "13900000003", Nickname = "管理员", Role = UserRole.Admin, CreatedAt = DateTime.UtcNow };

        db.Users.AddRange(owner, runner, admin);

        var order = new Order
        {
            OrderNo = $"ORD{Guid.NewGuid():N}"[..20],
            OwnerId = 100, RunnerId = 200,
            OrderType = OrderType.Pickup, Status = OrderStatus.Completed,
            ItemName = "测试", DeliveryLocation = "测试地点",
            Phone = "13800138000", Commission = 5.0m, TotalAmount = 5.0m,
            IsReviewed = true,
            CreatedAt = DateTime.UtcNow, AcceptedAt = DateTime.UtcNow, CompletedAt = DateTime.UtcNow
        };
        db.Orders.Add(order);
        db.SaveChanges();

        db.Reviews.Add(new Review
        {
            OrderId = order.Id, RunnerId = 200, Rating = 4,
            Content = "服务很好", ScoreChange = 1, CreatedAt = DateTime.UtcNow
        });
        db.SaveChanges();
    }

    /// <summary>
    /// 属性：单主提交评价后，返回的响应中不包含评价内容（Content 为 null）
    /// </summary>
    [Property(MaxTest = 20)]
    public bool 提交评价响应不包含评价内容(PositiveInt seed)
    {
        var rating = (seed.Get % 5) + 1;
        var dbName = $"vis_submit_{Guid.NewGuid()}";
        using var factory = CreateFactory(dbName);

        // 准备数据（未评价的已完成订单）
        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
            db.Users.Add(new User { Id = 100, OpenId = $"owner_{dbName}", Phone = "13900000001", Nickname = "单主", CreatedAt = DateTime.UtcNow });
            db.Users.Add(new User { Id = 200, OpenId = $"runner_{dbName}", Phone = "13900000002", Nickname = "跑腿", Role = UserRole.Runner, RunnerScore = 80, CreatedAt = DateTime.UtcNow });

            db.Orders.Add(new Order
            {
                OrderNo = $"ORD{Guid.NewGuid():N}"[..20],
                OwnerId = 100, RunnerId = 200,
                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(100));

        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 = "这是评价内容" }).Result;

        if (response.StatusCode != HttpStatusCode.OK) return false;

        var json = response.Content.ReadFromJsonAsync<JsonElement>().Result;

        // 评价内容不应在普通用户的响应中返回
        if (json.TryGetProperty("content", out var contentProp))
        {
            return contentProp.ValueKind == JsonValueKind.Null;
        }
        return true; // 没有 content 字段也算通过
    }

    /// <summary>
    /// 属性：管理员可以查看评价内容
    /// </summary>
    [Property(MaxTest = 20)]
    public bool 管理员可查看评价内容(PositiveInt seed)
    {
        var dbName = $"vis_admin_{Guid.NewGuid()}";
        using var factory = CreateFactory(dbName);
        SeedReviewData(factory, Guid.NewGuid().ToString("N"));

        var client = factory.CreateClient();
        // 使用管理员 token
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", GenerateToken(300, "Admin"));

        var response = client.GetAsync("/api/admin/reviews").Result;
        if (response.StatusCode != HttpStatusCode.OK) return false;

        var json = response.Content.ReadFromJsonAsync<JsonElement>().Result;
        if (json.GetArrayLength() == 0) return false;

        var firstReview = json[0];
        // 管理员应能看到评价内容
        if (firstReview.TryGetProperty("content", out var contentProp))
        {
            return contentProp.ValueKind == JsonValueKind.String && contentProp.GetString() == "服务很好";
        }
        return false;
    }

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