using BuildFlow.Application.Roles.Handlers;
using BuildFlow.Application.Roles.Queries;
using BuildFlow.Domain.Entities;
using BuildFlow.Infrastructure.Persistence;
using FluentAssertions;
using Microsoft.EntityFrameworkCore;
using Xunit;

namespace BuildFlow.Rag.Tests.Roles;

/// <summary>
/// 角色列表查询处理器单元测试。覆盖正常查询和空表场景。
/// </summary>
public class GetRoleListQueryHandlerTests
{
    private static async Task<(RagDbContext db, GetRoleListQueryHandler handler)> SetupAsync()
    {
        var options = new DbContextOptionsBuilder<RagDbContext>()
            .UseInMemoryDatabase($"rolelist-{Guid.NewGuid()}")
            .Options;
        var db = new RagDbContext(options);

        db.Roles.AddRange(
            new Role { Id = Guid.NewGuid(), Name = "SuperAdmin", CreatedBy = "s", UpdatedBy = "s", OperatorIP = "0" },
            new Role { Id = Guid.NewGuid(), Name = "Admin", CreatedBy = "s", UpdatedBy = "s", OperatorIP = "0" },
            new Role { Id = Guid.NewGuid(), Name = "User", CreatedBy = "s", UpdatedBy = "s", OperatorIP = "0" }
        );
        await db.SaveChangesAsync();

        var handler = new GetRoleListQueryHandler(db);
        return (db, handler);
    }

    [Fact]
    public async Task GetRoleList_ReturnsAllRoles()
    {
        // Arrange
        var (db, handler) = await SetupAsync();

        // Act
        var result = await handler.Handle(new GetRoleListQuery(), CancellationToken.None);

        // Assert
        result.Should().HaveCount(3);
        result.Select(r => r.Name).Should().Contain(new[] { "SuperAdmin", "Admin", "User" });
    }

    [Fact]
    public async Task GetRoleList_OnEmptyDatabase_ReturnsEmptyList()
    {
        // Arrange
        var options = new DbContextOptionsBuilder<RagDbContext>()
            .UseInMemoryDatabase($"rolelist-empty-{Guid.NewGuid()}")
            .Options;
        var db = new RagDbContext(options);
        var handler = new GetRoleListQueryHandler(db);

        // Act
        var result = await handler.Handle(new GetRoleListQuery(), CancellationToken.None);

        // Assert
        result.Should().BeEmpty();
    }
}