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 20: 完成订单状态转换
/// 对任意处于进行中状态的订单，跑腿提交完成后状态应变为"待确认"，
/// 单主确认后状态应变为"已完成"；单主拒绝后状态应保持"进行中"。
/// **Feature: login-and-homepage, Property 20: 完成订单状态转换**
///
/// </summary>
public class CompleteOrderPropertyTests : 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>
    /// 准备进行中的订单数据（单主 + 跑腿 + 认证 + InProgress 订单）
    /// </summary>
    private (int ownerId, int runnerId, int orderId) SeedInProgressOrder(
        WebApplicationFactory<Program> factory, string suffix)
    {
        var ownerId = 100;
        var runnerId = 200;

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

        db.Users.Add(new User
        {
            Id = ownerId, OpenId = $"owner_{suffix}", Phone = "13900000001",
            Nickname = "单主", CreatedAt = DateTime.UtcNow
        });
        db.Users.Add(new User
        {
            Id = runnerId, OpenId = $"runner_{suffix}", Phone = "13900000002",
            Nickname = "跑腿", Role = UserRole.Runner, CreatedAt = DateTime.UtcNow
        });
        db.RunnerCertifications.Add(new RunnerCertification
        {
            UserId = runnerId, RealName = "测试跑腿", Phone = "13900000002",
            Status = CertificationStatus.Approved, CreatedAt = DateTime.UtcNow
        });

        var order = new Order
        {
            OrderNo = $"ORD{suffix}"[..Math.Min(20, 3 + suffix.Length)],
            OwnerId = ownerId, RunnerId = runnerId,
            OrderType = OrderType.Pickup, Status = OrderStatus.InProgress,
            ItemName = "测试物品", DeliveryLocation = "测试地点",
            Phone = "13800138000", Commission = 5.0m, TotalAmount = 5.0m,
            CreatedAt = DateTime.UtcNow, AcceptedAt = DateTime.UtcNow
        };
        db.Orders.Add(order);
        db.SaveChanges();

        return (ownerId, runnerId, order.Id);
    }

    /// <summary>
    /// 属性：跑腿提交完成后，订单状态变为 WaitConfirm
    /// </summary>
    [Property(MaxTest = 20)]
    public bool 跑腿提交完成后状态变为待确认(PositiveInt seed)
    {
        var dbName = $"complete_{Guid.NewGuid()}";
        using var factory = CreateFactory(dbName);
        var (_, runnerId, orderId) = SeedInProgressOrder(factory, Guid.NewGuid().ToString("N"));

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

        var response = client.PostAsJsonAsync($"/api/orders/{orderId}/complete",
            new { CompletionProof = seed.Get % 2 == 0 ? "https://img.test/proof.jpg" : (string?)null }).Result;

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

        // 验证数据库中的状态
        using var scope = factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
        var order = db.Orders.Find(orderId)!;

        return order.Status == OrderStatus.WaitConfirm && order.CompletedAt != null;
    }

    /// <summary>
    /// 属性：单主确认后，订单状态变为 Completed
    /// </summary>
    [Property(MaxTest = 20)]
    public bool 单主确认后状态变为已完成(PositiveInt seed)
    {
        var dbName = $"confirm_{Guid.NewGuid()}";
        using var factory = CreateFactory(dbName);
        var (ownerId, runnerId, orderId) = SeedInProgressOrder(factory, Guid.NewGuid().ToString("N"));

        var client = factory.CreateClient();

        // 先让跑腿提交完成
        client.DefaultRequestHeaders.Authorization =
            new AuthenticationHeaderValue("Bearer", GenerateToken(runnerId, "Runner"));
        var completeResp = client.PostAsJsonAsync($"/api/orders/{orderId}/complete",
            new { CompletionProof = (string?)null }).Result;
        if (completeResp.StatusCode != HttpStatusCode.OK) return false;

        // 单主确认
        client.DefaultRequestHeaders.Authorization =
            new AuthenticationHeaderValue("Bearer", GenerateToken(ownerId));
        var confirmResp = client.PostAsync($"/api/orders/{orderId}/confirm", null).Result;
        if (confirmResp.StatusCode != HttpStatusCode.OK) return false;

        using var scope = factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
        var order = db.Orders.Find(orderId)!;

        return order.Status == OrderStatus.Completed;
    }

    /// <summary>
    /// 属性：单主拒绝后，订单状态回到 InProgress
    /// </summary>
    [Property(MaxTest = 20)]
    public bool 单主拒绝后状态回到进行中(PositiveInt seed)
    {
        var dbName = $"reject_{Guid.NewGuid()}";
        using var factory = CreateFactory(dbName);
        var (ownerId, runnerId, orderId) = SeedInProgressOrder(factory, Guid.NewGuid().ToString("N"));

        var client = factory.CreateClient();

        // 先让跑腿提交完成
        client.DefaultRequestHeaders.Authorization =
            new AuthenticationHeaderValue("Bearer", GenerateToken(runnerId, "Runner"));
        var completeResp = client.PostAsJsonAsync($"/api/orders/{orderId}/complete",
            new { CompletionProof = (string?)null }).Result;
        if (completeResp.StatusCode != HttpStatusCode.OK) return false;

        // 单主拒绝
        client.DefaultRequestHeaders.Authorization =
            new AuthenticationHeaderValue("Bearer", GenerateToken(ownerId));
        var rejectResp = client.PostAsync($"/api/orders/{orderId}/reject", null).Result;
        if (rejectResp.StatusCode != HttpStatusCode.OK) return false;

        using var scope = factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
        var order = db.Orders.Find(orderId)!;

        return order.Status == OrderStatus.InProgress;
    }

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