"""部分更新防 NULL 覆盖：编辑时未传的可选字段不得把数据库旧值清空为 NULL。"""
import json

from modules.file_template.schemas import FileTemplateForm
from modules.file_template.service import file_template_service
from modules.city.schemas import CityForm
from modules.city.service import update_city
from modules.city.repository import city_repo
from modules.system.dept.schemas import DeptForm
from modules.system.dept.service import update_dept
from modules.system.dept.repository import dept_repo
from modules.article.schemas import ArticleForm
from modules.article.service import update_article
from modules.article.repository import article_repo


def _body(result):
    return json.loads(result.body)


# ============ base 层 _build_update_fields ============

def test_build_update_fields_excludes_none(fake_request):
    data = FileTemplateForm(id=1, name='模板', sort=5)  # code/file_name/file_path/note 未传 → None
    fields = file_template_service._build_update_fields(fake_request, data)
    assert 'id' not in fields
    assert 'name' in fields
    assert 'sort' in fields
    assert 'code' not in fields
    assert 'filePath' not in fields
    assert 'update_user' in fields
    assert 'update_time' in fields


# ============ city：编辑顶级时 parent_id 不被清空 ============

def test_update_city_preserves_parent_id_when_omitted(monkeypatch, fake_request):
    monkeypatch.setattr(city_repo, 'get_by_id', lambda uid: object())
    captured = {}
    monkeypatch.setattr(city_repo, 'update', lambda uid, fields: captured.update(fields) or True)

    data = CityForm(
        id=1, name='省', shortName='s', pinyin='p', cityCode='010',
        areaCode='11', zipCode='100', level=1, lng='0', lat='0',
    )  # parentId 未传 → None
    result = update_city(fake_request, data)
    assert _body(result)['ok'] is True
    assert 'parentId' not in captured


# ============ dept：编辑顶级时 parent_id 不被清空 ============

def test_update_dept_preserves_parent_id_when_omitted(monkeypatch, fake_request):
    monkeypatch.setattr(dept_repo, 'exists_by_field', lambda *a, **k: False)
    monkeypatch.setattr(dept_repo, 'get_by_id', lambda uid: object())
    captured = {}
    monkeypatch.setattr(dept_repo, 'update', lambda uid, fields: captured.update(fields) or True)

    data = DeptForm(id=1, name='部门', code='D1', type=1, sort=1)  # parent_id/note 未传 → None
    result = update_dept(fake_request, data)
    assert _body(result)['ok'] is True
    assert 'parentId' not in captured
    assert 'note' not in captured


# ============ article：未传的 category_id/intro/author 不被清空 ============

def test_update_article_preserves_optional_fields_when_omitted(monkeypatch, fake_request):
    class _OldArticle:
        cover = None
        images = None
        content = None

    monkeypatch.setattr(article_repo, 'get_by_id', lambda uid: _OldArticle())
    captured = {}
    monkeypatch.setattr(article_repo, 'update', lambda uid, fields: captured.update(fields) or True)

    data = ArticleForm(id=1, title='标题', status=0)  # category_id/intro/author 未传 → None
    result = update_article(fake_request, data)
    assert _body(result)['ok'] is True
    assert 'title' in captured
    assert 'categoryId' not in captured
    assert 'intro' not in captured
    assert 'author' not in captured