from __future__ import annotations

from pathlib import Path

import pytest

from host_agent.config import (
    HostAgentConfigurationError,
    HostAgentConfig,
    load_host_agent_config,
)


def test_load_host_agent_config_uses_managed_cloud_default() -> None:
    assert load_host_agent_config({}) == HostAgentConfig(
        control_plane_url="https://amcp.home.jerryyan.top",
        enrollment_managed=True,
    )


def test_load_host_agent_config_parses_poll_and_retry_values() -> None:
    config = load_host_agent_config(
        {
            "HOST_AGENT_CONTROL_PLANE_URL": "https://cloud.example/v1/",
            "HOST_AGENT_HEARTBEAT_INTERVAL_SECONDS": "10",
            "HOST_AGENT_POLL_TIMEOUT_SECONDS": "15",
            "HOST_AGENT_RETRY_BACKOFF_SECONDS": "2",
            "HOST_AGENT_MAX_RETRY_BACKOFF_SECONDS": "20",
        }
    )

    assert config.control_plane_url == "https://cloud.example/v1"
    assert config.poll_timeout_seconds == 15
    assert config.max_retry_backoff_seconds == 20


def test_load_host_agent_config_uses_direct_enrollment(tmp_path) -> None:
    identity_path = tmp_path / "host_identity.json"
    config = load_host_agent_config(
        {
            "HOST_AGENT_CONTROL_PLANE_URL": "https://cloud.example",
            "HOST_AGENT_IDENTITY_PATH": str(identity_path),
            "HOST_AGENT_DISPLAY_NAME": "Edge Mac",
        }
    )

    assert config.host_id == ""
    assert config.token == ""
    assert config.identity_path == identity_path
    assert config.enrollment_managed is True
    assert config.display_name == "Edge Mac"


def test_static_credential_environment_variables_are_ignored() -> None:
    config = load_host_agent_config(
        {
            "HOST_AGENT_HOST_ID": "legacy-host",
            "HOST_AGENT_TOKEN": "legacy-token",
            "HOST_AGENT_ENROLLMENT_TOKEN": "legacy-enrollment-token",
        }
    )

    assert config.host_id == ""
    assert config.token == ""
    assert config.enrollment_managed is True


def test_fresh_install_defaults_local_account_path() -> None:
    config = load_host_agent_config(
        {"HOST_AGENT_CONTROL_PLANE_URL": "https://cloud.example"}
    )

    assert config.enrollment_managed is True
    assert config.local_account_path == Path("tasks/host_local_account.json")


def test_local_account_path_can_be_overridden(tmp_path) -> None:
    account_path = tmp_path / "account.json"
    config = load_host_agent_config(
        {
            "HOST_AGENT_CONTROL_PLANE_URL": "https://cloud.example",
            "HOST_AGENT_LOCAL_ACCOUNT_PATH": str(account_path),
        }
    )

    assert config.local_account_path == account_path


@pytest.mark.parametrize(
    "overrides",
    [
        {"HOST_AGENT_CONTROL_PLANE_URL": "ftp://cloud.example"},
        {"HOST_AGENT_POLL_TIMEOUT_SECONDS": "0"},
        {
            "HOST_AGENT_RETRY_BACKOFF_SECONDS": "10",
            "HOST_AGENT_MAX_RETRY_BACKOFF_SECONDS": "5",
        },
    ],
)
def test_load_host_agent_config_rejects_invalid_values(
    overrides: dict[str, str],
) -> None:
    with pytest.raises(HostAgentConfigurationError):
        load_host_agent_config(overrides)


def test_console_defaults_are_disabled_and_do_not_trigger_validation() -> None:
    config = load_host_agent_config({})

    assert config.console_enabled is False
    assert config.console_bind_host == "127.0.0.1"
    assert config.console_port == 8765
    assert config.console_allow_non_loopback is False
    assert config.console_session_ttl_seconds == 43200.0
    assert config.console_history_limit == 200


def test_console_enabled_with_default_loopback_bind_passes() -> None:
    config = load_host_agent_config({"HOST_AGENT_CONSOLE_ENABLED": "true"})

    assert config.console_enabled is True
    assert config.console_bind_host == "127.0.0.1"


@pytest.mark.parametrize("bind_host", ["127.0.0.1", "localhost", "::1"])
def test_console_enabled_with_loopback_bind_host_passes(bind_host: str) -> None:
    config = load_host_agent_config(
        {
            "HOST_AGENT_CONSOLE_ENABLED": "true",
            "HOST_AGENT_CONSOLE_BIND_HOST": bind_host,
        }
    )

    assert config.console_bind_host == bind_host


def test_console_enabled_with_non_loopback_bind_without_opt_in_raises() -> None:
    with pytest.raises(HostAgentConfigurationError):
        load_host_agent_config(
            {
                "HOST_AGENT_CONSOLE_ENABLED": "true",
                "HOST_AGENT_CONSOLE_BIND_HOST": "0.0.0.0",
            }
        )


def test_console_enabled_with_non_loopback_bind_with_opt_in_succeeds() -> None:
    config = load_host_agent_config(
        {
            "HOST_AGENT_CONSOLE_ENABLED": "true",
            "HOST_AGENT_CONSOLE_BIND_HOST": "0.0.0.0",
            "HOST_AGENT_CONSOLE_ALLOW_NON_LOOPBACK": "true",
        }
    )

    assert config.console_bind_host == "0.0.0.0"
    assert config.console_allow_non_loopback is True


def test_console_disabled_with_non_loopback_bind_does_not_raise() -> None:
    config = load_host_agent_config({"HOST_AGENT_CONSOLE_BIND_HOST": "0.0.0.0"})

    assert config.console_enabled is False
    assert config.console_bind_host == "0.0.0.0"


def test_console_env_vars_parse_numeric_and_bool_fields() -> None:
    config = load_host_agent_config(
        {
            "HOST_AGENT_CONSOLE_ENABLED": "1",
            "HOST_AGENT_CONSOLE_PORT": "9001",
            "HOST_AGENT_CONSOLE_SESSION_TTL_SECONDS": "3600",
            "HOST_AGENT_CONSOLE_HISTORY_LIMIT": "50",
        }
    )

    assert config.console_enabled is True
    assert config.console_port == 9001
    assert config.console_session_ttl_seconds == 3600
    assert config.console_history_limit == 50


@pytest.mark.parametrize(
    "overrides",
    [
        {"HOST_AGENT_CONSOLE_PORT": "0"},
        {"HOST_AGENT_CONSOLE_SESSION_TTL_SECONDS": "-1"},
        {"HOST_AGENT_CONSOLE_HISTORY_LIMIT": "0"},
    ],
)
def test_console_numeric_fields_reject_invalid_values(
    overrides: dict[str, str],
) -> None:
    with pytest.raises(HostAgentConfigurationError):
        load_host_agent_config(overrides)