using FluentAssertions;
using Microsoft.EntityFrameworkCore;
using NSubstitute;
using Xunit;
using BuildFlow.Platform.Application.Users.Commands;
using BuildFlow.Platform.Application.Users.Handlers;
using BuildFlow.Platform.Domain.Common;
using BuildFlow.Shared.Domain.Exceptions;

namespace BuildFlow.Platform.Tests.Users;

/// <summary>
/// 分配角色 Command 处理器单元测试。覆盖分配成功 + 权限版本号自增、角色不存在拒绝。
/// </summary>
public class AssignRolesCommandHandlerTests
{
    [Fact]
    public async Task Handle_ValidAssignment_ShouldBumpPermissionVersion()
    {
        // Arrange
        var db = PlatformTestDb.CreateDbContext();
        var userId = Guid.NewGuid();
        await PlatformTestDb.SeedUserAsync(db, userId, "assign-target", permissionVersion: 3);
        var roleId = Guid.NewGuid();
        db.Roles.Add(PlatformTestDb.WithAudit(new BuildFlow.Platform.Domain.Entities.Role { Id = roleId, Name = "Editor" }));
        await db.SaveChangesAsync();
        var versionStore = Substitute.For<IPermissionVersionStore>();
        var handler = new AssignRolesCommandHandler(db, versionStore);

        // Act
        await handler.Handle(new AssignRolesCommand(userId, [roleId]), CancellationToken.None);

        // Assert：版本号自增（3 → 4）+ Redis 镜像同步
        var user = await db.Users.FirstAsync(u => u.Id == userId);
        user.PermissionVersion.Should().Be(4);
        await versionStore.Received(1).BumpAsync(Arg.Is<IEnumerable<Guid>>(ids => ids.Contains(userId)), Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Handle_NonExistentRole_ShouldThrowNotFound()
    {
        // Arrange
        var db = PlatformTestDb.CreateDbContext();
        var userId = Guid.NewGuid();
        await PlatformTestDb.SeedUserAsync(db, userId, "victim");
        var handler = new AssignRolesCommandHandler(db, Substitute.For<IPermissionVersionStore>());

        // Act
        var act = () => handler.Handle(new AssignRolesCommand(userId, [Guid.NewGuid()]), CancellationToken.None);

        // Assert
        await act.Should().ThrowAsync<NotFoundException>()
            .WithMessage("*部分角色不存在*");
    }
}