"""Per-instance TOML config loader tests (REQ-048 / BAT-013)."""
from __future__ import annotations

import subprocess
import sys
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) -> str:
    p = tmp_path / "inst.toml"
    p.write_text(body)
    return str(p)


def test_from_toml_parses(tmp_path):
    """AC-1: from_toml reads instance_key + portfolio_hub_token."""
    path = _write_toml(tmp_path, 'instance_key = "inst-1"\nportfolio_hub_token = "tok"\n')
    cfg = DaemonInstanceConfig.from_toml(path)
    assert cfg.instance_key == "inst-1"
    assert cfg.portfolio_hub_token == "tok"


def test_from_toml_missing_instance_key_raises(tmp_path):
    """AC-4: missing required instance_key → error (no silent default)."""
    path = _write_toml(tmp_path, 'portfolio_hub_token = "tok"\n')
    with pytest.raises(RuntimeError):
        DaemonInstanceConfig.from_toml(path)


def test_from_config_injects_token(tmp_path, monkeypatch):
    """AC-3 / S-5: TOML token is injected into PortfolioHubConfig when base_url is set,
    even with TREX_PORTFOLIO_HUB_TOKEN absent from the environment."""
    monkeypatch.setenv("TREX_POSTGRESQL_DSN", "postgresql://x/y")
    monkeypatch.setenv("TREX_PORTFOLIO_HUB_BASE_URL", "http://hub:18000")
    monkeypatch.delenv("TREX_PORTFOLIO_HUB_TOKEN", raising=False)
    path = _write_toml(tmp_path, 'instance_key = "inst-9"\nportfolio_hub_token = "toml-tok"\n')
    cfg = DaemonConfig.from_config(path)
    assert cfg.instance_key == "inst-9"
    assert cfg.portfolio_hub is not None
    assert cfg.portfolio_hub.token == "toml-tok"


def test_default_instance_key_when_from_env(monkeypatch):
    monkeypatch.setenv("TREX_POSTGRESQL_DSN", "postgresql://x/y")
    assert DaemonConfig.from_env().instance_key == "default"


def test_config_required_cli_exits_nonzero():
    """AC-2: daemon entry without --config exits non-zero (argparse required)."""
    proc = subprocess.run(
        [sys.executable, "-m", "trex_core.runtime.daemon"],
        capture_output=True, text=True, timeout=30, cwd=str(_REPO),
    )
    assert proc.returncode != 0
    assert "config" in (proc.stderr + proc.stdout).lower()


def test_gitignore_excludes_instance_toml():
    """AC-5: .gitignore excludes instance TOML but keeps the example."""
    gi = (_REPO / ".gitignore").read_text()
    assert "/config/*.toml" in gi
    assert "!/config/instance.example.toml" in gi