"""D-3 bridge_client 单元测试（symbol 转换 + HTTP mock）。

不依赖 Windows/miniQMT——bridge_client 是纯 HTTP 客户端，mock urllib 即可。
覆盖：to_bridge_code 转换规则、place_order 成功/失败返回、失败不抛异常。
"""
import urllib.error
from unittest.mock import MagicMock, patch

from sanguo_trader.bridge_client import BridgeClient, to_bridge_code


class TestToBridgeCode:
    """sanguo symbol（纯数字码）→ bridge code（sh/sz 前缀）转换。

    规则与 sanguo_data.datareader.guess_exchange 一致。
    """

    def test_sh_codes(self):
        """沪市：60/68/51/56/58 开头。"""
        assert to_bridge_code("600000") == "sh600000"
        assert to_bridge_code("688981") == "sh688981"
        assert to_bridge_code("510300") == "sh510300"

    def test_sz_codes(self):
        """深市：00/30/15 开头。"""
        assert to_bridge_code("000001") == "sz000001"
        assert to_bridge_code("300750") == "sz300750"
        assert to_bridge_code("159915") == "sz159915"

    def test_already_prefixed(self):
        """已含 sh/sz 前缀 → 小写直返。"""
        assert to_bridge_code("sh600000") == "sh600000"
        assert to_bridge_code("SZ000001") == "sz000001"


class TestBridgeClientHttp:
    """BridgeClient HTTP 调用 mock（不真发请求）。"""

    def test_place_order_ok(self):
        """成功返回 {ok, order_id}。"""
        with patch("sanguo_trader.bridge_client.urllib.request.urlopen") as mu:
            resp = MagicMock()
            resp.read.return_value = b'{"ok": true, "order_id": 12345}'
            mu.return_value.__enter__.return_value = resp
            client = BridgeClient("http://b.test", "tok")
            r = client.place_order("sh600000", "buy", 10.5, 100)
        assert r == {"ok": True, "order_id": 12345}
        mu.assert_called_once()  # 确实发了请求

    def test_place_order_network_failure_returns_none(self):
        """网络失败 → 返回 None，不抛异常（影子下单旁路原则）。"""
        with patch("sanguo_trader.bridge_client.urllib.request.urlopen") as mu:
            mu.side_effect = urllib.error.URLError("conn refused")
            client = BridgeClient("http://b.test", "tok")
            r = client.place_order("sh600000", "buy", 10.5, 100)
        assert r is None

    def test_get_account_failure_returns_none(self):
        with patch("sanguo_trader.bridge_client.urllib.request.urlopen") as mu:
            mu.side_effect = TimeoutError("slow")
            client = BridgeClient("http://b.test", "tok")
            r = client.get_account()
        assert r is None