def test_tree_shape(client):
    tree = client.get("/api/tree").json()
    assert [f["name"] for f in tree] == ["업무", "개인"]
    work = tree[0]
    biz = next(p for p in work["projects"] if p["id"] == "biz")
    assert {c["id"] for c in biz["children"]} == {"biz-okr", "biz-report", "biz-budget"}
    assert biz["task_count"] >= biz["children"][0]["task_count"]  # 재귀 합


def test_project_crud(client):
    created = client.post("/api/projects", json={"folder_id": "work", "name": "새 프로젝트"}).json()
    pid = created["id"]
    client.patch(f"/api/projects/{pid}", json={"name": "이름변경"})
    assert client.post(f"/api/projects/{pid}/pin").json()["pinned"] is True
    assert client.delete(f"/api/projects/{pid}").json()["deleted"] == pid


def test_folder_system_protected(client):
    # system 폴더(work)는 삭제 불가
    r = client.delete("/api/folders/work")
    assert r.status_code == 400


def test_project_cycle_move_blocked(client):
    # biz 를 자기 자식(biz-okr) 아래로 이동 시도 → 400
    r = client.patch("/api/projects/biz", json={"parent_id": "biz-okr"})
    assert r.status_code == 400