"""ExistingSystemExplorer 测试：CodeStructure → ExistingSystemInfo 分层组装。"""
import pytest

from genesis.data_models import CodeStructure, ControllerInfo, EntityInfo, ServiceInfo
from genesis.impact.existing_system_explorer import ExistingSystemExplorer


def _code() -> CodeStructure:
    return CodeStructure(
        root_path="/fake/root",
        language="java",
        modules=["trade-order"],
        classes=[],
        controllers=[
            ControllerInfo(name="OrderController", class_name="OrderController", path="OrderController.java",
                           base_path="/api/order", endpoints=["/api/order/{id}"], source_uri="OrderController.java"),
        ],
        services=[ServiceInfo(name="OrderService", class_name="OrderService", path="OrderService.java",
                              methods=["query"], source_uri="OrderService.java")],
        entities=[EntityInfo(name="OrderEntity", class_name="OrderEntity", path="OrderEntity.java",
                             table_name="t_order", fields=["id"], source_uri="OrderEntity.java")],
        endpoints=[],
        raw_imports=[],
    )


def test_explore_assembles_layers():
    info = ExistingSystemExplorer().explore(_code())
    assert len(info.controller_layer) == 1
    assert info.controller_layer[0].class_name == "OrderController"
    assert len(info.service_layer) == 1
    assert info.service_layer[0].class_name == "OrderService"
    assert len(info.entity_layer) == 1
    assert info.entity_layer[0].table_name == "t_order"
    assert info.source_path == "/fake/root"


def test_explore_empty_code():
    code = CodeStructure(root_path="/x", language="java", modules=[], classes=[], controllers=[],
                         services=[], entities=[], endpoints=[], raw_imports=[])
    info = ExistingSystemExplorer().explore(code)
    assert info.controller_layer == []
    assert info.service_layer == []
    assert info.entity_layer == []
    assert info.api_endpoints == []