"""SafetySellConfig env-var parsing tests (REQ-041 / BAT-010)."""
from __future__ import annotations

import pytest

from trex_core.runtime.config import DaemonConfig, SafetySellConfig

_SAFETY_KEYS = (
    "TREX_WATCHDOG_TIMEOUT",
    "TREX_WATCHDOG_GRACE_PERIOD",
    "TREX_FORCED_CLOSE_CHECK_INTERVAL",
    "TREX_STOP_LOSS_POLL_INTERVAL",
    "TREX_MARKET_CLOSE_LIQUIDATION_TIME",
    "TREX_SAFETY_SELL_MIN_RETRY_INTERVAL",
    "TREX_SAFETY_SELL_MAX_RETRY_WARN_COUNT",
)


@pytest.fixture(autouse=True)
def _clean_env(monkeypatch):
    for k in _SAFETY_KEYS:
        monkeypatch.delenv(k, raising=False)


@pytest.fixture
def _base_env(monkeypatch):
    monkeypatch.setenv("TREX_POSTGRESQL_DSN", "dbname=x")


def test_safety_sell_config_defaults(tmp_path, monkeypatch, _base_env):
    """AC-1: unset env vars produce documented defaults."""
    monkeypatch.chdir(tmp_path)
    cfg = DaemonConfig.from_env()
    ss = cfg.safety_sell
    assert ss.watchdog_timeout_sec == 120
    assert ss.watchdog_grace_period_sec == 60
    assert ss.forced_close_check_interval_sec == 60
    assert ss.stop_loss_poll_interval_sec == 30
    assert ss.market_close_liquidation_time is None
    # BAT-014 / REQ-053
    assert ss.min_retry_interval_sec == 600
    assert ss.max_retry_warn_count == 3


def test_retry_cooldown_env_tuning(tmp_path, monkeypatch, _base_env):
    """REQ-053 AC-2: retry cooldown env vars are parsed."""
    monkeypatch.chdir(tmp_path)
    monkeypatch.setenv("TREX_SAFETY_SELL_MIN_RETRY_INTERVAL", "300")
    monkeypatch.setenv("TREX_SAFETY_SELL_MAX_RETRY_WARN_COUNT", "5")
    ss = DaemonConfig.from_env().safety_sell
    assert ss.min_retry_interval_sec == 300
    assert ss.max_retry_warn_count == 5


def test_safety_sell_config_env_tuning(tmp_path, monkeypatch, _base_env):
    """AC-2~5: all five env vars are parsed correctly."""
    monkeypatch.chdir(tmp_path)
    monkeypatch.setenv("TREX_WATCHDOG_TIMEOUT", "180")
    monkeypatch.setenv("TREX_WATCHDOG_GRACE_PERIOD", "90")
    monkeypatch.setenv("TREX_FORCED_CLOSE_CHECK_INTERVAL", "45")
    monkeypatch.setenv("TREX_STOP_LOSS_POLL_INTERVAL", "15")
    monkeypatch.setenv("TREX_MARKET_CLOSE_LIQUIDATION_TIME", "15:30")
    cfg = DaemonConfig.from_env()
    ss = cfg.safety_sell
    assert ss.watchdog_timeout_sec == 180
    assert ss.watchdog_grace_period_sec == 90
    assert ss.forced_close_check_interval_sec == 45
    assert ss.stop_loss_poll_interval_sec == 15
    assert ss.market_close_liquidation_time == "15:30"


def test_market_close_liquidation_time_empty_string_becomes_none(tmp_path, monkeypatch, _base_env):
    """Empty string for optional field collapses to None."""
    monkeypatch.chdir(tmp_path)
    monkeypatch.setenv("TREX_MARKET_CLOSE_LIQUIDATION_TIME", "")
    cfg = DaemonConfig.from_env()
    assert cfg.safety_sell.market_close_liquidation_time is None


def test_safety_sell_config_is_frozen():
    """SafetySellConfig is a frozen dataclass."""
    ss = SafetySellConfig()
    with pytest.raises((AttributeError, TypeError)):
        ss.watchdog_timeout_sec = 999  # type: ignore[misc]