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

namespace Tiku.IntegrationTests.Api;

public sealed class TenantAdminDirectEndpointTests
{
    [Fact]
    public async Task Tenant_admin_can_manage_classes_members_and_students()
    {
        await using var factory = new ApiTestFactory();
        var seed = await SeedAdminAsync(factory);
        var regionId = Guid.NewGuid();
        await factory.SeedAsync(new Region { Id = regionId, TenantId = seed.TenantId, Name = "四川" });
        using var client = factory.CreateClient();
        await LoginAsync(client, seed);

        var classResponse = await client.PutAsJsonAsync(
            "/api/tenant-admin/classes",
            new UpsertTenantAdminClassDto
            {
                RegionId = regionId,
                Code = "A001",
                Name = "冲刺一班",
                Order = 1
            });
        var classJson = await ReadJsonAsync(classResponse);
        var classId = classJson.RootElement.GetProperty("item").GetProperty("id").GetGuid();

        var memberResponse = await client.PutAsJsonAsync(
            "/api/tenant-admin/classes/members",
            new UpsertTenantAdminClassMemberDto
            {
                ClassId = classId,
                MemberType = "student",
                User = new TenantAdminUserLookupDto
                {
                    Phone = "13900000001",
                    Name = "张同学"
                },
                Metadata = JsonSerializer.SerializeToElement(new { source = "test" })
            });
        var memberJson = await ReadJsonAsync(memberResponse);
        var studentUserId = memberJson.RootElement.GetProperty("item").GetProperty("userId").GetGuid();

        var listResponse = await client.GetAsync($"/api/tenant-admin/students?classId={classId}");
        var listJson = await ReadJsonAsync(listResponse);
        var classesResponse = await client.GetAsync("/api/tenant-admin/classes");
        var classesJson = await ReadJsonAsync(classesResponse);

        Assert.Equal(HttpStatusCode.OK, classResponse.StatusCode);
        Assert.Equal(HttpStatusCode.OK, memberResponse.StatusCode);
        Assert.Equal(HttpStatusCode.OK, listResponse.StatusCode);
        Assert.Equal(studentUserId, listJson.RootElement.GetProperty("items")[0].GetProperty("userId").GetGuid());
        Assert.Equal(1, classesJson.RootElement.GetProperty("items")[0].GetProperty("studentCount").GetInt32());

        using var scope = factory.Services.CreateScope();
        var dbContext = scope.ServiceProvider.GetRequiredService<TikuDbContext>();
        Assert.True(await dbContext.StudentProfiles.AnyAsync(profile => profile.TenantId == seed.TenantId && profile.UserId == studentUserId));
        Assert.True(await dbContext.TenantMemberships.AnyAsync(member => member.TenantId == seed.TenantId && member.UserId == studentUserId && member.Role == TenantRole.Student));
        Assert.True(await dbContext.AuditLogs.AnyAsync(log => log.TenantId == seed.TenantId && log.Action == "tenant.class_member.upserted"));
    }

    [Fact]
    public async Task Tenant_admin_can_write_student_notes_and_followups()
    {
        await using var factory = new ApiTestFactory();
        var seed = await SeedAdminAsync(factory);
        var studentId = Guid.NewGuid();
        await factory.SeedAsync(
            new User { Id = studentId, Phone = "13900000002", Name = "李同学" },
            new TenantMembership { TenantId = seed.TenantId, UserId = studentId, Role = TenantRole.Student, Status = MembershipStatus.Active },
            new StudentProfile { TenantId = seed.TenantId, UserId = studentId });
        using var client = factory.CreateClient();
        await LoginAsync(client, seed);

        var noteResponse = await client.PutAsJsonAsync(
            "/api/tenant-admin/student-notes",
            new UpsertTenantAdminStudentNoteDto
            {
                StudentUserId = studentId,
                NoteType = "learning",
                Content = "需要关注英语词汇",
                IsPinned = true
            });
        var followupResponse = await client.PutAsJsonAsync(
            "/api/tenant-admin/student-followups",
            new UpsertTenantAdminStudentFollowupDto
            {
                StudentUserId = studentId,
                AssignedToUserId = seed.UserId,
                Title = "电话回访",
                FollowupType = "service",
                Priority = "high",
                Status = "in_progress"
            });
        var notesResponse = await client.GetAsync($"/api/tenant-admin/student-notes?studentUserId={studentId}");
        var followupsResponse = await client.GetAsync($"/api/tenant-admin/student-followups?studentUserId={studentId}");
        var notesJson = await ReadJsonAsync(notesResponse);
        var followupsJson = await ReadJsonAsync(followupsResponse);

        Assert.Equal(HttpStatusCode.OK, noteResponse.StatusCode);
        Assert.Equal(HttpStatusCode.OK, followupResponse.StatusCode);
        Assert.Single(notesJson.RootElement.GetProperty("items").EnumerateArray());
        Assert.Single(followupsJson.RootElement.GetProperty("items").EnumerateArray());
        Assert.Equal("电话回访", followupsJson.RootElement.GetProperty("items")[0].GetProperty("title").GetString());
    }

    [Fact]
    public async Task Student_status_update_revokes_active_sessions()
    {
        await using var factory = new ApiTestFactory();
        var seed = await SeedAdminAsync(factory);
        var studentId = Guid.NewGuid();
        await factory.SeedAsync(
            new User { Id = studentId, Phone = "13900000003", Name = "王同学" },
            new TenantMembership { TenantId = seed.TenantId, UserId = studentId, Role = TenantRole.Student, Status = MembershipStatus.Active },
            new AuthSession
            {
                TenantId = seed.TenantId,
                UserId = studentId,
                TokenHash = "student-session",
                Provider = "password",
                ExpiresAt = DateTimeOffset.UtcNow.AddHours(1)
            });
        using var client = factory.CreateClient();
        await LoginAsync(client, seed);

        var statusResponse = await client.PostAsJsonAsync(
            "/api/tenant-admin/students/status",
            new UpdateTenantAdminStudentStatusDto
            {
                UserId = studentId,
                Status = "disabled",
                Reason = "测试禁用"
            });

        Assert.Equal(HttpStatusCode.OK, statusResponse.StatusCode);
        using var scope = factory.Services.CreateScope();
        var dbContext = scope.ServiceProvider.GetRequiredService<TikuDbContext>();
        Assert.True(await dbContext.AuthSessions.AnyAsync(session => session.UserId == studentId && session.RevokedAt != null));
    }

    [Fact]
    public async Task Tenant_operator_cannot_access_tenant_admin_direct_endpoints()
    {
        await using var factory = new ApiTestFactory();
        var seed = await SeedAdminAsync(factory, TenantRole.TenantOperator);
        using var client = factory.CreateClient();
        await LoginAsync(client, seed);

        using var response = await client.GetAsync("/api/tenant-admin/students");

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

    private static async Task<(Guid TenantId, Guid UserId, string Phone)> SeedAdminAsync(
        ApiTestFactory factory,
        TenantRole role = TenantRole.TenantAdmin)
    {
        var tenantId = Guid.NewGuid();
        var userId = Guid.NewGuid();
        var phone = $"137{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 = "Tenant Admin"
            },
            new TenantMembership
            {
                TenantId = tenantId,
                UserId = userId,
                Role = role,
                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();
    }
}