import json

import pytest
from fastapi.testclient import TestClient

from app.api_response import error_response
from app.database import get_db
from app.main import create_app


class EmptyDb:
    def scalar(self, _statement):
        return None


def test_health_uses_the_standard_success_envelope():
    response = TestClient(create_app()).get("/health")

    assert response.status_code == 200
    assert response.json() == {
        "code": 200,
        "msg": "success",
        "data": {"ok": True, "service": "miniapp-api"},
    }


def test_public_not_found_uses_the_standard_error_envelope():
    app = create_app()
    app.dependency_overrides[get_db] = lambda: EmptyDb()

    try:
        response = TestClient(app).get("/api/public/details/missing-detail")
    finally:
        app.dependency_overrides.clear()

    assert response.status_code == 404
    assert response.json() == {
        "code": 404,
        "msg": "详情不存在",
        "data": None,
    }


def test_request_validation_uses_the_standard_error_envelope():
    response = TestClient(create_app()).post("/api/public/leads", json={})

    assert response.status_code == 400
    body = response.json()
    assert body["code"] == 400
    assert body["data"] is None
    assert body["errorCode"] == "VALIDATION_ERROR"
    assert body["msg"]


@pytest.mark.parametrize("status_code", [400, 401, 404, 409, 422, 500])
def test_supported_error_statuses_keep_the_same_envelope(status_code):
    response = error_response(status_code, "示例错误", error_code="EXAMPLE_ERROR")

    assert response.status_code == status_code
    assert json.loads(response.body) == {
        "code": status_code,
        "msg": "示例错误",
        "data": None,
        "errorCode": "EXAMPLE_ERROR",
    }