namespace Yh.SchClass.OpenApi.Tests;

/// <summary>SchTree（教师组树）端点契约与 <see cref="TeaTreeVo"/> 反序列化。</summary>
public class SchClassSchTreeClientTests
{
    private const string Root = "/oapi/SchGroup/";

    [Fact]
    public async Task SchGroup_GetTeaTree_路径与参数名对齐()
    {
        var handler = SchClassTestHost.Ok();
        var api = SchClassTestHost.Api(handler);

        // 双参数齐全：按 Java 参数原名 SchSerID / schId 提交
        await api.SchTree.GetTeaTreeAsync("S1", 2);
        SchClassTestHost.Verify(handler, HttpMethod.Get, Root + "GetTeaTree", "?SchSerID=S1&schId=2");

        // 仅 schId（服务端优先使用）
        await api.SchTree.GetTeaTreeAsync(null, 5);
        SchClassTestHost.Verify(handler, HttpMethod.Get, Root + "GetTeaTree", "?schId=5");

        // 仅 SchSerID
        await api.SchTree.GetTeaTreeAsync("S9", null);
        SchClassTestHost.Verify(handler, HttpMethod.Get, Root + "GetTeaTree", "?SchSerID=S9");

        // 都缺：服务端返回 []（不抛异常）
        await api.SchTree.GetTeaTreeAsync();
        SchClassTestHost.Verify(handler, HttpMethod.Get, Root + "GetTeaTree", "");
    }

    [Fact]
    public async Task TeaTreeVO_嵌套树按Java原名反序列化()
    {
        // 教师叶子节点无 children 字段（Java @JsonInclude(NON_NULL) 省略）
        var handler = FakeHandler.Json(HttpStatusCode.OK, """
        [{"id":10,"name":"第一中学","pid":0,"no":1,"type":1,"isParent":true,"photo":"",
          "children":[
            {"id":31,"name":"教师组","pid":10,"no":1,"type":1,"isParent":true,"photo":"",
             "children":[
               {"id":32,"name":"语文组","pid":31,"no":1,"type":1,"isParent":true,"photo":"",
                "children":[
                  {"id":77,"name":"王老师","pid":32,"no":0,"type":2,"isParent":false,"photo":""}]},
               {"id":99,"name":"李老师","pid":31,"no":0,"type":2,"isParent":false,"photo":""}]}]}]
        """);

        var tree = await SchClassTestHost.Api(handler).SchTree.GetTeaTreeAsync("S001", null);

        Assert.Single(tree);
        var sch = tree[0];
        Assert.Equal(10, sch.Id);
        Assert.Equal("第一中学", sch.Name);
        Assert.Equal(0, sch.Pid);
        Assert.Equal(1, sch.Type);
        Assert.True(sch.IsParent);
        Assert.Equal("", sch.Photo);

        var teaGroup = Assert.Single(sch.Children!);
        Assert.Equal(31, teaGroup.Id);
        Assert.Equal("教师组", teaGroup.Name);
        Assert.Equal(10, teaGroup.Pid);

        Assert.Equal(2, teaGroup.Children!.Count);
        var subject = teaGroup.Children[0];
        Assert.Equal("语文组", subject.Name);
        var tea = Assert.Single(subject.Children!);
        Assert.Equal(77, tea.Id);
        Assert.Equal("王老师", tea.Name);
        Assert.Equal(32, tea.Pid);
        Assert.Equal(0, tea.No);
        Assert.Equal(2, tea.Type);
        Assert.False(tea.IsParent);
        Assert.Null(tea.Children);

        var ungrouped = teaGroup.Children[1];
        Assert.Equal(99, ungrouped.Id);
        Assert.Equal("李老师", ungrouped.Name);
        Assert.Null(ungrouped.Children);
    }

    [Fact]
    public async Task GetTeaTree_两参数都缺时服务端空数组返回空列表()
    {
        var handler = FakeHandler.Json(HttpStatusCode.OK, "[]");

        var tree = await SchClassTestHost.Api(handler).SchTree.GetTeaTreeAsync();

        Assert.NotNull(tree);
        Assert.Empty(tree);
    }

    [Fact]
    public async Task GetTeaTree_服务端404时归一为空列表()
    {
        var handler = FakeHandler.Empty(HttpStatusCode.NotFound);

        var tree = await SchClassTestHost.Api(handler).SchTree.GetTeaTreeAsync("S001", null);

        Assert.NotNull(tree);
        Assert.Empty(tree);
    }
}