from pathlib import Path

from fastapi.testclient import TestClient

from fin_hub.app import create_app
from fin_hub.routers.runway import create_runway_router
from fin_hub.services.evidence import seed_fixture_ledger


def _client_for_ledger(ledger: Path) -> TestClient:
    app = create_app()
    app.include_router(
        create_runway_router(ledger_path_resolver=lambda _: ledger),
        prefix="/test",
    )
    return TestClient(app)


def test_runway_summary_and_monthly_burn_endpoints(tmp_path: Path):
    ledger = tmp_path / "ledger.db"
    seed_fixture_ledger(ledger_path=ledger, opening_balance=12000.0)
    client = _client_for_ledger(ledger)

    burn_response = client.get("/test/runway/monthly-burn")
    assert burn_response.status_code == 200
    burns = burn_response.json()
    assert any(row["currency"] == "EUR" and row["period_month"] == "2026-06" for row in burns)

    summary_response = client.get("/test/runway/summary")
    assert summary_response.status_code == 200
    summary = summary_response.json()
    assert summary["opening_balance"] == 12000.0
    assert summary["runway"]["currency"] == "EUR"
    assert summary["runway"]["monthly_burn"] > 0


def test_runway_summary_requires_balance_when_unset(tmp_path: Path):
    from fin_hub.services.ledger import monthly_summary

    ledger = tmp_path / "empty.db"
    monthly_summary(ledger_path=ledger)
    client = _client_for_ledger(ledger)
    response = client.get("/test/runway/summary")
    assert response.status_code == 422


def test_runway_summary_404_when_ledger_missing(tmp_path: Path):
    ledger = tmp_path / "missing.db"
    client = _client_for_ledger(ledger)
    response = client.get("/test/runway/summary?balance=12000")
    assert response.status_code == 404


def test_create_app_healthz():
    client = TestClient(create_app())
    response = client.get("/healthz")
    assert response.status_code == 200
    assert response.json()["service"] == "fin-hub"