from pathlib import Path

import pytest

from exporter.config import Config


VALID_FERNET_KEY = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA="  # 44 chars base64 -> 32 bytes


def test_config_loads_global_fields(tmp_path: Path):
    yaml_content = f"""
    global:
      http_listen: "0.0.0.0:9100"
      scrape_interval_seconds: 60
      netconf_port: 830
      connect_timeout_seconds: 5
      rpc_timeout_seconds: 10
      max_workers: 10
      api_token: "changeme"
      runtime_db_path: "./devices.db"
      password_secret: "{VALID_FERNET_KEY}"
      ssh_keepalive_seconds: 30
      failure_threshold: 3
      max_backoff_factor: 8
      shutdown_timeout_seconds: 30
      log_level: INFO
      log_to_stdout: true
      log_file: ""
      log_file_max_bytes: 10485760
      log_file_backup_count: 5
    """
    cfg_file = tmp_path / "config.yaml"
    cfg_file.write_text(yaml_content)

    cfg = Config.from_file(cfg_file)
    g = cfg.global_

    assert g.http_listen == "0.0.0.0:9100"
    assert g.scrape_interval_seconds == 60
    assert g.rpc_timeout_seconds == 10
    assert g.runtime_db_path == "./devices.db"
    assert g.password_secret == VALID_FERNET_KEY
    assert g.ssh_keepalive_seconds == 30
    assert g.failure_threshold == 3
    assert g.max_backoff_factor == 8
    assert g.shutdown_timeout_seconds == 30


def test_config_invalid_fernet_key_raises():
    data = {
        "global": {
            "runtime_db_path": "./devices.db",
            "password_secret": "too-short",
        }
    }
    with pytest.raises(ValueError, match="Invalid Fernet key"):
        Config.from_dict(data)


def test_shutdown_timeout_too_small_warns():
    data = {
        "global": {
            "http_listen": "0.0.0.0:9100",
            "scrape_interval_seconds": 60,
            "netconf_port": 830,
            "connect_timeout_seconds": 5,
            "rpc_timeout_seconds": 20,
            "max_workers": 10,
            "api_token": "changeme",
            "runtime_db_path": "./devices.db",
            "password_secret": VALID_FERNET_KEY,
            "ssh_keepalive_seconds": 30,
            "failure_threshold": 3,
            "max_backoff_factor": 8,
            "shutdown_timeout_seconds": 10,
            "log_level": "INFO",
            "log_to_stdout": True,
            "log_file": "",
            "log_file_max_bytes": 10485760,
            "log_file_backup_count": 5,
        }
    }
    with pytest.warns(UserWarning):
        Config.from_dict(data)