from pathlib import Path

import pytest

from fin_hub.ingest.anthropic import parse_anthropic_billing_csv
from fin_hub.ingest.cloud import parse_cloud_cost_csv
from fin_hub.ingest.hosteurope import parse_hosteurope_csv

FIXTURES = Path(__file__).parent / "fixtures"


def test_parse_cloud_cost_csv():
    rows = parse_cloud_cost_csv(FIXTURES / "cloud-costs.csv")
    assert len(rows) == 3
    assert rows[0].service == "state-hub"
    assert rows[0].amount == 42.5


def test_parse_anthropic_billing_csv():
    rows = parse_anthropic_billing_csv(FIXTURES / "anthropic-billing.csv")
    assert len(rows) == 2
    assert rows[0].provider == "anthropic"
    assert rows[0].tokens_in == 12000


def test_parse_hosteurope_csv():
    rows = parse_hosteurope_csv(FIXTURES / "hosteurope.csv")
    assert len(rows) == 2
    assert rows[0].service_id == "dedicated-server-m"
    assert rows[0].period_month == "2026-06"


def test_parse_hosteurope_client_attribution(tmp_path: Path):
    source = tmp_path / "attributed.csv"
    source.write_text(
        "product,amount,currency,invoice_date,client_id,application_id,app_instance_id\n"
        "Managed cluster,42.00,EUR,2026-07-01,acme,portal,prod-01\n",
        encoding="utf-8",
    )

    row = parse_hosteurope_csv(source)[0]
    assert row.client_id == "acme"
    assert row.application_id == "portal"
    assert row.app_instance_id == "prod-01"
    assert row.cost_attribution_key == "client:acme|app:portal|instance:prod-01"


def test_parse_hosteurope_rejects_partial_attribution(tmp_path: Path):
    source = tmp_path / "partial.csv"
    source.write_text(
        "product,amount,currency,invoice_date,client_id\n"
        "Managed cluster,42.00,EUR,2026-07-01,acme\n",
        encoding="utf-8",
    )

    with pytest.raises(ValueError, match="must be supplied together"):
        parse_hosteurope_csv(source)