"""接口集成测试（FastAPI TestClient）：错误码 + 鉴权 + 正常用例结构。"""
import base64

import pytest
from fastapi.testclient import TestClient
from conftest import fixture

import app as app_module

URL = "/api/v1/face/measure"
H = {"X-Internal-Token": "testpass"}   # 与 worker_config.json 一致


@pytest.fixture(scope="module")
def client():
    # with 触发 lifespan：加载模型单例（detector + 尽力加载 segmenter）
    with TestClient(app_module.app) as c:
        yield c


def _post(client, fixture_name=None, headers=H, data=None, extra_files=None):
    files = {}
    if fixture_name:
        files["image_file"] = (fixture_name, open(fixture(fixture_name), "rb"), "application/octet-stream")
    if extra_files:
        files.update(extra_files)
    return client.post(URL, headers=headers, files=files or None, data=data)


def test_auth_missing_token_401(client):
    r = _post(client, "frontal.jpg", headers={})
    assert r.status_code == 401


def test_health_no_token_200(client):
    r = client.get("/health")
    assert r.status_code == 200
    assert r.json()["status"] == "ok"


def test_param_none_provided_1007(client):
    r = client.post(URL, headers=H)
    assert r.json()["code"] == 1007


def test_param_multiple_provided_1007(client):
    r = _post(client, "frontal.jpg", data={"image_url": "http://example.com/x.jpg"})
    assert r.json()["code"] == 1007


def test_oversize_1006(client, oversize_file):
    files = {"image_file": ("oversize.bin", open(oversize_file, "rb"), "application/octet-stream")}
    r = client.post(URL, headers=H, files=files)
    assert r.json()["code"] == 1006


def test_lowres_1002(client):
    r = _post(client, "lowres.png")
    assert r.json()["code"] == 1002


def test_no_face_1001(client):
    r = _post(client, "landscape.jpg")
    assert r.json()["code"] == 1001


def test_corrupt_1008(client):
    r = _post(client, "corrupt.bin")
    assert r.json()["code"] == 1008


def test_success_structure(client):
    r = _post(client, "frontal.jpg")
    body = r.json()
    assert body["code"] == 0, body
    data = body["data"]
    # 业务字段对齐文档
    assert set(["face_total_height_cm", "four_courts", "seven_eyes",
                "landmarks", "hairline_source", "head_pose",
                "annotated_image_base64"]).issubset(data.keys())
    assert set(["top_court_cm", "upper_court_cm", "middle_court_cm",
                "lower_court_cm", "ratios"]).issubset(data["four_courts"].keys())
    assert set(["eye_width_cm", "face_width_cm", "inter_eye_distance_cm",
                "ratios"]).issubset(data["seven_eyes"].keys())
    assert data["hairline_source"] in ("segmentation", "estimated")
    # base64 解码为合法 PNG（非 URL）
    assert "annotated_image_url" not in data
    png = base64.b64decode(data["annotated_image_base64"])
    assert png[:8] == b"\x89PNG\r\n\x1a\n"