using FluentAssertions;
using Xunit;
using Workflow.Application.Form.ComponentRegistry.Handlers;
using Workflow.Application.Form.ComponentRegistry.Queries;
using Workflow.Domain.Entities;

namespace BuildFlow.Workflow.Tests.Form;

/// <summary>
/// manifest handler 单元测试：验证后端元数据驱动的物料清单查询逻辑
/// （分组、排序、IsActive 过滤、轻量投影不含 SupportedProps）。
/// </summary>
public class GetFormComponentManifestQueryHandlerTests
{
    private static WorkflowDbContext CreateDb(params FormComponentRegistry[] seeds)
    {
        var db = TestDbFactory.Create();
        if (seeds.Length > 0)
        {
            db.FormComponentRegistries.AddRange(seeds);
            db.SaveChanges();
        }
        return db;
    }

    private static FormComponentRegistry Seed(
        string name,
        string category,
        int sortOrder,
        bool active = true,
        string supportedProps = "{\"basic\":[]}") => new()
    {
        Id = Guid.NewGuid(),
        Name = name,
        DisplayName = name + "显示名",
        Category = category,
        Icon = "lucide:test",
        DefaultSchema = "{}",
        SupportedProps = supportedProps,
        IsActive = active,
        SortOrder = sortOrder,
    };

    [Fact]
    public async Task Returns_Groups_By_Category_Sorted_By_SortOrder()
    {
        // 跨分类、乱序插入，验证分组聚合 + 组内/组间排序
        var db = CreateDb(
            Seed("Select", "选择控件", 2),
            Seed("Input", "基础输入", 1),
            Seed("RadioGroup", "选择控件", 1),
            Seed("Textarea", "基础输入", 2)
        );
        var handler = new GetFormComponentManifestQueryHandler(db);

        var result = await handler.Handle(new GetFormComponentManifestQuery(), default);

        // 分组顺序：基础输入(sortOrder min=1) 在 选择控件(min=1) 之前？同 min 时按出现稳定顺序
        // 基础输入组内最小 sortOrder=1，选择控件组内最小=1，两者相等，稳定排序保持插入顺序
        result.Groups.Should().HaveCount(2);
        var basic = result.Groups.First(g => g.Title == "基础输入");
        basic.Items.Select(i => i.Name).Should().Equal(["Input", "Textarea"]);
        var select = result.Groups.First(g => g.Title == "选择控件");
        select.Items.Select(i => i.Name).Should().Equal(["RadioGroup", "Select"]);
    }

    [Fact]
    public async Task Filters_Out_Inactive_Components()
    {
        var db = CreateDb(
            Seed("Input", "基础输入", 1, active: true),
            Seed("Hidden", "基础输入", 2, active: false)
        );
        var handler = new GetFormComponentManifestQueryHandler(db);

        var result = await handler.Handle(new GetFormComponentManifestQuery(), default);

        result.Groups.Should().ContainSingle();
        result.Groups[0].Items.Should().ContainSingle();
        result.Groups[0].Items[0].Name.Should().Be("Input");
    }

    [Fact]
    public async Task Projection_Excludes_SupportedProps()
    {
        // manifest 是轻量接口：物料面板不需要 SupportedProps（那是属性面板用的全量接口的职责）
        var db = CreateDb(
            Seed("Input", "基础输入", 1, supportedProps: "{\"basic\":[{\"key\":\"placeholder\"}]}")
        );
        var handler = new GetFormComponentManifestQueryHandler(db);

        var result = await handler.Handle(new GetFormComponentManifestQuery(), default);

        var item = result.Groups[0].Items[0];
        // ComponentManifestItem 只应有这 6 个字段，不含 SupportedProps
        item.Name.Should().Be("Input");
        item.DisplayName.Should().Be("Input显示名");
        item.Category.Should().Be("基础输入");
        item.Icon.Should().Be("lucide:test");
        item.DefaultSchema.Should().Be("{}");
        item.SortOrder.Should().Be(1);
        // 确认 DTO 类型本身没有 SupportedProps 字段（编译期保证，运行期额外断言属性集）
        item.GetType().GetProperties().Select(p => p.Name)
            .Should().NotContain("SupportedProps");
    }

    [Fact]
    public async Task Returns_Empty_When_No_Active_Components()
    {
        var db = CreateDb(Seed("Hidden", "x", 1, active: false));
        var handler = new GetFormComponentManifestQueryHandler(db);

        var result = await handler.Handle(new GetFormComponentManifestQuery(), default);

        result.Groups.Should().BeEmpty();
    }
}