using System.Net;
using System.Net.Http.Json;
using System.Text.Json;
using Microsoft.Extensions.DependencyInjection;
using Tiku.Api.Contracts;
using Tiku.Domain.Catalog;
using Tiku.Domain.Common;
using Tiku.Domain.Identity;
using Tiku.Domain.Learning;
using Tiku.Domain.Tenancy;
using Tiku.Infrastructure.Auth;
using Tiku.Infrastructure.Persistence;

namespace Tiku.IntegrationTests.Api;

public sealed class ProfileEndpointTests
{
    [Fact]
    public async Task Logged_in_student_can_get_and_update_profile()
    {
        await using var factory = new ApiTestFactory();
        var seed = await SeedStudentAsync(factory);
        var regionId = Guid.NewGuid();
        var schoolId = Guid.NewGuid();
        var majorId = Guid.NewGuid();
        await factory.SeedAsync(
            new Region { Id = regionId, TenantId = seed.TenantId, Name = "四川" },
            new School { Id = schoolId, TenantId = seed.TenantId, RegionId = regionId, Name = "美术学院" },
            new Major { Id = majorId, TenantId = seed.TenantId, RegionId = regionId, SchoolId = schoolId, Name = "视觉传达" });
        using var client = factory.CreateClient();
        await LoginAsync(client, seed);

        using var getResponse = await client.GetAsync("/api/profile/me");
        var getJson = await ReadJsonAsync(getResponse);
        using var patchResponse = await client.PatchAsJsonAsync(
            "/api/profile/me",
            new UpdateProfileDto
            {
                Name = "张三",
                AvatarPreset = "female",
                RegionId = regionId,
                SelectedSchoolId = schoolId,
                SelectedMajorId = majorId,
                Stats = JsonSerializer.SerializeToElement(new { level = 3 }),
                RecentActivities = JsonSerializer.SerializeToElement(new[] { new { type = "login" } })
            });
        var patchJson = await ReadJsonAsync(patchResponse);

        Assert.Equal(HttpStatusCode.OK, getResponse.StatusCode);
        Assert.NotEqual(Guid.Empty, getJson.RootElement.GetProperty("profileId").GetGuid());
        Assert.Equal(HttpStatusCode.OK, patchResponse.StatusCode);
        Assert.Equal("张三", patchJson.RootElement.GetProperty("name").GetString());
        Assert.Equal("female", patchJson.RootElement.GetProperty("avatarPreset").GetString());
        Assert.Equal(regionId, patchJson.RootElement.GetProperty("regionId").GetGuid());
    }

    [Fact]
    public async Task Exam_countdowns_use_current_profile_target()
    {
        await using var factory = new ApiTestFactory();
        var seed = await SeedStudentAsync(factory);
        var regionId = Guid.NewGuid();
        var schoolId = Guid.NewGuid();
        await factory.SeedAsync(
            new StudentProfile
            {
                TenantId = seed.TenantId,
                UserId = seed.UserId,
                RegionId = regionId,
                SelectedSchoolId = schoolId
            },
            new ExamDate
            {
                TenantId = seed.TenantId,
                RegionId = regionId,
                SchoolId = schoolId,
                ExamName = "校考",
                ExamAt = DateTimeOffset.UtcNow.AddDays(10)
            },
            new ExamDate
            {
                TenantId = seed.TenantId,
                RegionId = Guid.NewGuid(),
                ExamName = "其他地区考试",
                ExamAt = DateTimeOffset.UtcNow.AddDays(1)
            });
        using var client = factory.CreateClient();
        await LoginAsync(client, seed);

        using var response = await client.GetAsync("/api/profile/exam-countdowns");
        var json = await ReadJsonAsync(response);

        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        var item = json.RootElement.GetProperty("items").EnumerateArray().Single();
        Assert.Equal("校考", item.GetProperty("examName").GetString());
        Assert.True(item.GetProperty("daysLeft").GetInt32() >= 9);
    }

    [Fact]
    public async Task Profile_requires_authentication()
    {
        await using var factory = new ApiTestFactory();
        using var client = factory.CreateClient();

        using var response = await client.GetAsync("/api/profile/me");

        Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);
    }

    private static async Task<(Guid TenantId, Guid UserId, string Phone)> SeedStudentAsync(ApiTestFactory factory)
    {
        var tenantId = Guid.NewGuid();
        var userId = Guid.NewGuid();
        var phone = $"136{Random.Shared.Next(10000000, 99999999)}";
        var passwordHash = new PasswordHasher().Hash("passw0rd!");
        await factory.SeedAsync(
            new Tenant
            {
                Id = tenantId,
                Slug = tenantId.ToString("N"),
                Name = "Test Tenant",
                Status = TenantStatus.Active,
                Metadata = JsonDefaults.Object()
            },
            new User
            {
                Id = userId,
                Phone = phone,
                Name = "Student"
            },
            new TenantMembership
            {
                TenantId = tenantId,
                UserId = userId,
                Role = TenantRole.Student,
                Status = MembershipStatus.Active
            },
            new UserIdentity
            {
                UserId = userId,
                Provider = "password",
                ProviderSubject = phone,
                Phone = phone,
                SecretPayload = CreateSecretPayload(passwordHash)
            });

        return (tenantId, userId, phone);
    }

    private static async Task LoginAsync(
        HttpClient client,
        (Guid TenantId, Guid UserId, string Phone) seed)
    {
        var loginResponse = await client.PostAsJsonAsync(
            "/api/auth/login/password",
            new PasswordLoginDto
            {
                TenantId = seed.TenantId,
                Phone = seed.Phone,
                Password = "passw0rd!"
            });
        var loginJson = await ReadJsonAsync(loginResponse);
        var accessToken = loginJson.RootElement
            .GetProperty("tokens")
            .GetProperty("accessToken")
            .GetString();
        client.DefaultRequestHeaders.Authorization = new("Bearer", accessToken);
    }

    private static async Task<JsonDocument> ReadJsonAsync(HttpResponseMessage response)
    {
        var stream = await response.Content.ReadAsStreamAsync();
        return await JsonDocument.ParseAsync(stream);
    }

    private static JsonElement CreateSecretPayload(string passwordHash)
    {
        using var document = JsonDocument.Parse(
            $$"""{"passwordHash":{{JsonSerializer.Serialize(passwordHash)}}}""");
        return document.RootElement.Clone();
    }
}