using BuildFlow.Platform.Application.Menus.Commands;
using BuildFlow.Platform.Application.Menus.Handlers;
using BuildFlow.Platform.Application.Menus.Queries;
using BuildFlow.Platform.Domain.Entities;
using BuildFlow.Platform.Domain.Enums;
using BuildFlow.Platform.Infrastructure.Persistence;
using BuildFlow.Shared.Domain.Exceptions;
using FluentAssertions;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Xunit;

namespace BuildFlow.Platform.Tests.Menus;

/// <summary>
/// 菜单管理测试。约束菜单主键使用 int64，并保证拖拽排序按 long Id 落库。
/// </summary>
public class MenuSortTests
{
    [Fact]
    public void MenuIdentifier_ShouldUseInt64()
    {
        typeof(Menu).GetProperty(nameof(Menu.Id))!.PropertyType.Should().Be(typeof(long));
        typeof(Menu).GetProperty(nameof(Menu.ParentId))!.PropertyType.Should().Be(typeof(long?));
    }

    [Fact]
    public async Task SortMenusCommand_ShouldUpdateMenusByInt64Ids()
    {
        await using var db = BuildInMemoryDb();
        db.Menus.AddRange(
            BuildMenu(1, "root", null, 0),
            BuildMenu(2, "child-a", 1, 0),
            BuildMenu(3, "child-b", 1, 1));
        await db.SaveChangesAsync();

        var handler = new SortMenusCommandHandler(db);

        var affected = await handler.Handle(
            new SortMenusCommand(
            [
                new MenuSortItem(2, null, 1),
                new MenuSortItem(3, null, 0),
            ]),
            CancellationToken.None);

        affected.Should().Be(2);
        var childA = await db.Menus.SingleAsync(m => m.Id == 2);
        var childB = await db.Menus.SingleAsync(m => m.Id == 3);
        childA.ParentId.Should().BeNull();
        childA.Order.Should().Be(1);
        childB.ParentId.Should().BeNull();
        childB.Order.Should().Be(0);
    }

    [Fact]
    public async Task SortMenusCommand_ShouldRejectMovingMenuUnderDescendant()
    {
        await using var db = BuildInMemoryDb();
        db.Menus.AddRange(
            BuildMenu(1, "root", null, 0),
            BuildMenu(2, "child", 1, 0),
            BuildMenu(3, "grand-child", 2, 0));
        await db.SaveChangesAsync();

        var handler = new SortMenusCommandHandler(db);

        var act = () => handler.Handle(
            new SortMenusCommand([new MenuSortItem(1, 3, 0)]),
            CancellationToken.None);

        await act.Should().ThrowAsync<BusinessException>()
            .WithMessage("不能将菜单移动到自己的子菜单下面");
    }

    [Fact]
    public async Task GetAllMenusQuery_ShouldExposeBuildFlowFormRuntimeMetadata()
    {
        await using var db = BuildInMemoryDb();
        var userId = Guid.NewGuid();
        var roleId = Guid.NewGuid();
        var formId = Guid.NewGuid();

        db.Users.Add(new User
        {
            Id = userId,
            Username = "admin",
            Email = "admin@buildflow.local",
            PasswordHash = "hash",
            CreatedBy = "test",
            UpdatedBy = "test",
            OperatorIP = "127.0.0.1",
        });
        db.Roles.Add(new Role
        {
            Id = roleId,
            Name = "Admin",
            CreatedBy = "test",
            UpdatedBy = "test",
            OperatorIP = "127.0.0.1",
        });
        db.UserRoles.Add(new UserRole
        {
            UserId = userId,
            RoleId = roleId,
            CreatedBy = "test",
            UpdatedBy = "test",
        });
        db.Menus.Add(BuildMenu(
            100,
            "expense.request",
            null,
            0,
            renderType: MenuRenderType.BuildFlowForm,
            formDefinitionId: formId,
            runtimeViewMode: MenuRuntimeViewMode.List));
        await db.SaveChangesAsync();

        var handler = new GetAllMenusQueryHandler(db);

        var routes = await handler.Handle(new GetAllMenusQuery(userId.ToString()), CancellationToken.None);

        var route = routes.Should().ContainSingle().Subject;
        route.Component.Should().Be("/buildflow/runtime/index");
        route.Meta.RenderType.Should().Be("BuildFlowForm");
        route.Meta.FormDefinitionId.Should().Be(formId);
        route.Meta.RuntimeViewMode.Should().Be("List");
    }

    private static PlatformDbContext BuildInMemoryDb()
    {
        var services = new ServiceCollection();
        services.AddDbContext<PlatformDbContext>(o => o.UseInMemoryDatabase($"platform-menu-{Guid.NewGuid()}"));
        return services.BuildServiceProvider().GetRequiredService<PlatformDbContext>();
    }

    private static Menu BuildMenu(
        long id,
        string code,
        long? parentId,
        int order,
        MenuRenderType renderType = MenuRenderType.Route,
        Guid? formDefinitionId = null,
        MenuRuntimeViewMode runtimeViewMode = MenuRuntimeViewMode.List)
        => new()
        {
            Id = id,
            Code = code,
            Name = code.Replace(".", "-", StringComparison.Ordinal),
            Path = $"/{code}",
            ParentId = parentId,
            Title = code,
            Order = order,
            RenderType = renderType,
            FormDefinitionId = formDefinitionId,
            RuntimeViewMode = runtimeViewMode,
            CreatedBy = "test",
            CreatedAt = DateTime.UtcNow,
            UpdatedBy = "test",
            UpdatedAt = DateTime.UtcNow,
            OperatorIP = "127.0.0.1",
        };
}