#!/usr/bin/env python3

from __future__ import annotations

import importlib.util
import io
import socket
import sys
import tempfile
import unittest
import warnings
from pathlib import Path
from contextlib import redirect_stdout
from unittest.mock import patch


SERVICES_PATH = Path(__file__).with_name("services.py")
SPEC = importlib.util.spec_from_file_location("aiw_services", SERVICES_PATH)
services = importlib.util.module_from_spec(SPEC)
assert SPEC.loader is not None
sys.modules[SPEC.name] = services
SPEC.loader.exec_module(services)


def sample_manifest() -> dict:
    return {
        "services": {
            "alpha": {
                "enabled": True,
                "kind": "process",
                "command": ["python3", "-c", "import time; time.sleep(60)"],
                "groups": ["core"],
            },
            "beta": {
                "enabled": True,
                "kind": "process",
                "command": ["python3", "-c", "import time; time.sleep(60)"],
                "groups": ["capture"],
                "depends_on": ["alpha"],
            },
            "disabled": {
                "enabled": False,
                "kind": "process",
                "command": ["python3", "-c", "import time; time.sleep(60)"],
                "groups": ["core"],
            },
        }
    }


class ServiceManagerTests(unittest.TestCase):
    def test_select_services_excludes_disabled_by_default(self) -> None:
        selected = services.select_services(sample_manifest(), names=[], group=None)

        self.assertEqual([item.name for item in selected], ["alpha", "beta"])

    def test_select_services_can_include_disabled_for_status(self) -> None:
        selected = services.select_services(sample_manifest(), names=[], group=None, include_disabled=True)

        self.assertEqual([item.name for item in selected], ["alpha", "beta", "disabled"])

    def test_select_services_filters_by_group(self) -> None:
        selected = services.select_services(sample_manifest(), names=[], group="capture")

        self.assertEqual([item.name for item in selected], ["beta"])

    def test_health_ok_tcp_reports_open_port(self) -> None:
        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as server:
            server.bind(("127.0.0.1", 0))
            server.listen(1)
            port = server.getsockname()[1]

            ok, detail = services.health_ok({"health": {"type": "tcp", "host": "127.0.0.1", "port": port}})

        self.assertTrue(ok)
        self.assertIn(f"127.0.0.1:{port}", detail)

    def test_read_pid_ignores_invalid_pid_file(self) -> None:
        with tempfile.TemporaryDirectory() as tmp:
            pid_dir = Path(tmp) / "pids"
            target = pid_dir / "fidelity"
            target.mkdir(parents=True)
            (target / "alpha.pid").write_text("not-a-pid\n", encoding="utf-8")

            with patch.object(services, "PID_DIR", pid_dir):
                self.assertIsNone(services.read_pid("fidelity", "alpha"))

    def test_start_and_stop_managed_process(self) -> None:
        manifest = {
            "services": {
                "sleeper": {
                    "enabled": True,
                    "kind": "process",
                    "command": [sys.executable, "-c", "import time; time.sleep(60)"],
                    "restart": "never",
                }
            }
        }
        ref = services.ServiceRef("sleeper", manifest["services"]["sleeper"])

        with tempfile.TemporaryDirectory() as tmp:
            root = Path(tmp)
            with patch.object(services, "PID_DIR", root / "pids"), \
                patch.object(services, "LOG_DIR", root / "logs"), \
                patch.object(services, "STATE_DIR", root / "state"):
                started: set[str] = set()
                services.ensure_runtime()
                with warnings.catch_warnings():
                    warnings.simplefilter("ignore", ResourceWarning)
                    with redirect_stdout(io.StringIO()):
                        services.start_service("test", ref, manifest, started)

                pid = services.read_pid("test", "sleeper")
                self.assertTrue(services.is_running(pid))
                self.assertIn("sleeper", started)

                with redirect_stdout(io.StringIO()):
                    services.stop_service("test", ref)
                self.assertFalse(services.is_running(pid))


if __name__ == "__main__":
    unittest.main()