# #region TestCoreScheduler [C:3] [TYPE Module] [SEMANTICS test, scheduler, apscheduler, load, reload]
# @BRIEF Verify SchedulerService load_schedules and translation job add/remove contracts.
# @RELATION BINDS_TO -> [SchedulerService]
# @TEST_EDGE: load_schedules_reloads — jobs survive remove_all_jobs when re-registered from DB
# @TEST_EDGE: add_remove_translation_job — job correctly registered and removed from APScheduler
# @TEST_INVARIANT: translation_jobs_persist_across_reload -> VERIFIED_BY: [test_load_schedules_reloads_translation_schedules]

import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).parent.parent / "src"))

from unittest.mock import MagicMock, patch

from apscheduler.schedulers.background import BackgroundScheduler

# ---------------------------------------------------------------------------
# Helpers — fresh scheduler & mock config
# ---------------------------------------------------------------------------

def _make_mock_config_manager(backup_env_id="env1", backup_cron="0 3 * * *"):
    """Build a mock ConfigManager returning a single backup-enabled environment."""
    mgr = MagicMock()
    mock_env = MagicMock()
    mock_env.id = backup_env_id
    mock_env.backup_schedule = MagicMock()
    mock_env.backup_schedule.enabled = True
    mock_env.backup_schedule.cron_expression = backup_cron
    mock_config = MagicMock()
    mock_config.environments = [mock_env]
    mgr.get_config.return_value = mock_config
    return mgr


def _make_mock_task_manager():
    """Build a mock TaskManager returning no active tasks."""
    tm = MagicMock()
    tm.get_tasks.return_value = []
    return tm


# ---------------------------------------------------------------------------
# Fixture helpers — start/stop a real BackgroundScheduler
# ---------------------------------------------------------------------------

def _start_scheduler():
    """Create and start a BackgroundScheduler. Returns the scheduler instance."""
    sched = BackgroundScheduler()
    sched.start()
    return sched


def _stop_scheduler(sched):
    """Shutdown a BackgroundScheduler if running."""
    if sched.running:
        sched.shutdown(wait=False)


# #region test_load_schedules_reloads_translation_schedules [C:1] [TYPE Function]
def test_load_schedules_reloads_translation_schedules():
    """Verify load_schedules re-registers translation jobs after remove_all_jobs."""
    from src.core.scheduler import SchedulerService

    sched = _start_scheduler()
    try:
        cfg = _make_mock_config_manager()
        tm = _make_mock_task_manager()

        svc = SchedulerService.__new__(SchedulerService)
        svc.task_manager = tm
        svc.config_manager = cfg
        svc.scheduler = sched

        # Pre-register a translation job (simulates what happens before reload)
        svc.add_translation_job(
            schedule_id="sched-1",
            job_id="job-1",
            cron_expression="0 2 * * *",
        )

        # Verify it exists BEFORE reload
        job_before = sched.get_job("translate_sched-1")
        assert job_before is not None, "Translation job should exist before reload"

        # Mock the DB query that load_schedules uses internally
        mock_schedule = MagicMock()
        mock_schedule.id = "sched-1"
        mock_schedule.job_id = "job-1"
        mock_schedule.cron_expression = "0 2 * * *"
        mock_schedule.timezone = "UTC"
        mock_schedule.execution_mode = "full"

        mock_db = MagicMock()
        mock_db.query.return_value.filter.return_value.all.return_value = [mock_schedule]

        with patch("src.core.scheduler.SessionLocal", return_value=mock_db):
            svc.load_schedules()

        # After reload, the translation job should STILL exist
        job_after = sched.get_job("translate_sched-1")
        assert job_after is not None, (
            "Translation job should survive load_schedules (re-registered from DB)"
        )

        # Backup job should also exist (added from config)
        backup_job = sched.get_job("backup_env1")
        assert backup_job is not None, "Backup job should be registered by load_schedules"
    finally:
        _stop_scheduler(sched)
# #endregion test_load_schedules_reloads_translation_schedules


# #region test_add_and_remove_translation_job [C:1] [TYPE Function]
def test_add_and_remove_translation_job():
    """Verify add_translation_job registers and remove_translation_job removes."""
    from src.core.scheduler import SchedulerService

    sched = _start_scheduler()
    try:
        cfg = _make_mock_config_manager()
        tm = _make_mock_task_manager()

        svc = SchedulerService.__new__(SchedulerService)
        svc.task_manager = tm
        svc.config_manager = cfg
        svc.scheduler = sched

        # Should NOT exist before add
        assert sched.get_job("translate_sched-x") is None

        svc.add_translation_job(
            schedule_id="sched-x",
            job_id="job-x",
            cron_expression="*/5 * * * *",
        )

        # Should exist after add
        job = sched.get_job("translate_sched-x")
        assert job is not None, "Translation job should be registered after add"
        assert job.id == "translate_sched-x"

        svc.remove_translation_job("sched-x")

        # Should NOT exist after remove
        assert sched.get_job("translate_sched-x") is None, (
            "Translation job should be removed after remove_translation_job"
        )
    finally:
        _stop_scheduler(sched)
# #endregion test_add_and_remove_translation_job


# #region test_remove_nonexistent_translation_job_no_error [C:1] [TYPE Function]
def test_remove_nonexistent_translation_job_no_error():
    """Verify remove_translation_job handles non-existent job silently."""
    from src.core.scheduler import SchedulerService

    sched = _start_scheduler()
    try:
        cfg = _make_mock_config_manager()
        tm = _make_mock_task_manager()

        svc = SchedulerService.__new__(SchedulerService)
        svc.task_manager = tm
        svc.config_manager = cfg
        svc.scheduler = sched

        # Should not raise — silent ignore
        svc.remove_translation_job("nonexistent-sched")
    finally:
        _stop_scheduler(sched)
# #endregion test_remove_nonexistent_translation_job_no_error


# #endregion TestCoreScheduler