"""Per-instance watchdog timeout TOML tests (REQ-076/077, dcy-027, BAT-041).

TOML `watchdog_timeout_sec` wins over env TREX_WATCHDOG_TIMEOUT; absent keeps
the env value (default 120) so intraday instances are byte-for-byte unaffected.
The long-term profile combines this with safety_sell_enabled=false.
"""
from __future__ import annotations

from pathlib import Path

import pytest

from trex_core.runtime.config import DaemonConfig, DaemonInstanceConfig

_REPO = Path(__file__).resolve().parents[2]


def _write_toml(tmp_path, body: str, name: str = "inst.toml") -> str:
    p = tmp_path / name
    p.write_text(body)
    return str(p)


# --- REQ-076 AC-1: TOML value applied -----------------------------------------

def test_toml_watchdog_timeout_applied(tmp_path, monkeypatch):
    monkeypatch.setenv("TREX_POSTGRESQL_DSN", "postgresql://x/y")
    path = _write_toml(tmp_path, 'instance_key = "lt"\nwatchdog_timeout_sec = 1800\n')
    cfg = DaemonConfig.from_config(path)
    assert cfg.safety_sell.watchdog_timeout_sec == 1800


def test_toml_wins_over_env(tmp_path, monkeypatch):
    monkeypatch.setenv("TREX_POSTGRESQL_DSN", "postgresql://x/y")
    monkeypatch.setenv("TREX_WATCHDOG_TIMEOUT", "300")
    path = _write_toml(tmp_path, 'instance_key = "lt"\nwatchdog_timeout_sec = 1800\n')
    assert DaemonConfig.from_config(path).safety_sell.watchdog_timeout_sec == 1800


# --- REQ-076 AC-2: absent -> env fallback (no regression) ---------------------

def test_absent_falls_back_to_env(tmp_path, monkeypatch):
    monkeypatch.setenv("TREX_POSTGRESQL_DSN", "postgresql://x/y")
    monkeypatch.setenv("TREX_WATCHDOG_TIMEOUT", "300")
    path = _write_toml(tmp_path, 'instance_key = "day"\n')
    assert DaemonConfig.from_config(path).safety_sell.watchdog_timeout_sec == 300


def test_absent_and_no_env_keeps_default_120(tmp_path, monkeypatch):
    monkeypatch.setenv("TREX_POSTGRESQL_DSN", "postgresql://x/y")
    monkeypatch.delenv("TREX_WATCHDOG_TIMEOUT", raising=False)
    path = _write_toml(tmp_path, 'instance_key = "day"\n')
    assert DaemonConfig.from_config(path).safety_sell.watchdog_timeout_sec == 120


# --- REQ-076 AC-3: per-instance independence ----------------------------------

def test_instances_get_independent_timeouts(tmp_path, monkeypatch):
    monkeypatch.setenv("TREX_POSTGRESQL_DSN", "postgresql://x/y")
    monkeypatch.delenv("TREX_WATCHDOG_TIMEOUT", raising=False)
    day = _write_toml(tmp_path, 'instance_key = "day"\n', name="day.toml")
    lt = _write_toml(
        tmp_path, 'instance_key = "lt"\nwatchdog_timeout_sec = 1800\n', name="lt.toml"
    )
    assert DaemonConfig.from_config(day).safety_sell.watchdog_timeout_sec == 120
    assert DaemonConfig.from_config(lt).safety_sell.watchdog_timeout_sec == 1800


# --- from_toml validation (design: <= 0 rejected) ------------------------------

def test_nonpositive_timeout_rejected(tmp_path):
    for bad in ("0", "-60"):
        path = _write_toml(tmp_path, f'instance_key = "x"\nwatchdog_timeout_sec = {bad}\n')
        with pytest.raises(RuntimeError):
            DaemonInstanceConfig.from_toml(path)


# --- REQ-077 AC-1/AC-4: long-term profile recipe -------------------------------

def test_longterm_example_profile_loads_with_expected_combination(monkeypatch):
    """The shipped example profile yields: dedicated instance_key, safety-sell
    worker OFF, watchdog 1800s, capacity cap set."""
    monkeypatch.setenv("TREX_POSTGRESQL_DSN", "postgresql://x/y")
    example = _REPO / "config" / "longterm.example.toml"
    cfg = DaemonConfig.from_config(str(example))
    assert cfg.instance_key == "longterm"          # A-2: separate instance scope
    assert cfg.safety_sell_enabled is False        # autonomous liquidation OFF
    assert cfg.safety_sell.watchdog_timeout_sec == 1800
    assert cfg.max_active_slots == 10