from __future__ import annotations

import pytest

from blackout_notifier.config import Config, ConfigurationError

REQUIRED = {
    "BARGHEMAN_TOKEN": "bargheman",
    "EITAAYAR_TOKEN": "eitaayar",
    "CHAT_ID": "chat",
    "BILL_IDS": " 123,456,123 ,, ",
}


@pytest.fixture(autouse=True)
def do_not_load_project_dotenv(monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.setattr("blackout_notifier.config.load_dotenv", lambda **_: None)


def test_config_parses_and_deduplicates_bill_ids(monkeypatch: pytest.MonkeyPatch) -> None:
    for name, value in REQUIRED.items():
        monkeypatch.setenv(name, value)

    config = Config.from_env()

    assert config.bill_ids == ("123", "456")
    assert str(config.state_file) == "state/outages.json"
    assert config.lookahead_days == 5


def test_config_reports_all_missing_required_values(monkeypatch: pytest.MonkeyPatch) -> None:
    for name in REQUIRED:
        monkeypatch.delenv(name, raising=False)

    expected = "BARGHEMAN_TOKEN.*EITAAYAR_TOKEN.*CHAT_ID.*BILL_IDS"
    with pytest.raises(ConfigurationError, match=expected):
        Config.from_env()


def test_config_rejects_non_decimal_bill_ids(monkeypatch: pytest.MonkeyPatch) -> None:
    for name, value in REQUIRED.items():
        monkeypatch.setenv(name, value)
    monkeypatch.setenv("BILL_IDS", "123,761/pe9314604429")

    with pytest.raises(ConfigurationError, match="decimal IDs"):
        Config.from_env()


def test_config_validates_numeric_ranges(monkeypatch: pytest.MonkeyPatch) -> None:
    for name, value in REQUIRED.items():
        monkeypatch.setenv(name, value)
    monkeypatch.setenv("LOOKAHEAD_DAYS", "0")

    with pytest.raises(ConfigurationError, match="between 1 and 30"):
        Config.from_env()