import importlib
import time
import pytest

server_app_module = importlib.import_module("server.app")

# Expose app and init_db from the imported module
app = server_app_module.app
init_db = server_app_module.init_db


@pytest.fixture(autouse=True)
def setup_tmp_db(tmp_path, monkeypatch):
    tmp_db = tmp_path / "forms.db"
    monkeypatch.setattr(server_app_module, "DB_PATH", tmp_db, raising=False)
    init_db()
    yield


@pytest.fixture
def client():
    with app.test_client() as client:
        yield client


def test_metrics_endpoint_reports_uptime_and_total(client):
    # Ensure a simple GET to /metrics succeeds and returns recent uptime
    resp = client.get("/metrics")
    assert resp.status_code == 200
    # If prometheus_client isn't installed, metrics returns JSON
    if resp.content_type.startswith("application/json"):
        body = resp.get_json()
        assert "uptime_seconds" in body
        assert "total_submissions" in body
    else:
        # If prometheus_client is present, the response is the Prometheus text format
        text = resp.get_data(as_text=True)
        assert "# HELP" in text or "http_request_duration_seconds" in text


def test_request_metrics_increment_on_request(client):
    # Make sure we have a baseline
    before = client.get("/metrics").get_data(as_text=True)
    # Trigger a contact submission attempt (invalid payload will still count the request)
    client.post("/api/contact", data={})
    # Wait a tiny bit for histogram observation
    time.sleep(0.01)
    after = client.get("/metrics").get_data(as_text=True)
    # If prometheus_client isn't present, the JSON will include total_submissions
    if client.get("/metrics").content_type.startswith("application/json"):
        before_json = client.get("/metrics").get_json()
        after_json = client.get("/metrics").get_json()
        assert after_json["uptime_seconds"] >= before_json["uptime_seconds"]
    else:
        # Ensure some metrics text exists and that it changed (best-effort)
        assert after != before