from __future__ import annotations

from datetime import UTC, datetime, timedelta
from pathlib import Path

from repub.job_retention import cleanup_job_executions
from repub.jobs import JobArtifacts
from repub.model import (
    Job,
    JobExecution,
    JobExecutionStatus,
    create_source,
    database,
    initialize_database,
)

NOW = datetime(2026, 6, 2, 12, 0, tzinfo=UTC)


def _create_job(name: str) -> Job:
    source = create_source(
        name=name,
        slug=name.lower().replace(" ", "-"),
        source_type="feed",
        notes="",
        spider_arguments="",
        enabled=False,
        cron_minute="*/5",
        cron_hour="*",
        cron_day_of_month="*",
        cron_day_of_week="*",
        cron_month="*",
        feed_url=f"https://example.com/{name.lower().replace(' ', '-')}.xml",
    )
    with database.reader():
        return Job.get(Job.source == source)


def _create_execution(
    job: Job,
    *,
    status: JobExecutionStatus,
    ended_at: datetime | None = None,
) -> JobExecution:
    with database.writer():
        return JobExecution.create(
            job=job,
            running_status=status,
            started_at=ended_at - timedelta(minutes=5) if ended_at else None,
            ended_at=ended_at,
        )


def _write_artifacts(
    log_dir: Path, job: Job, execution: JobExecution
) -> tuple[Path, ...]:
    artifacts = JobArtifacts.for_execution(
        log_dir=log_dir,
        job_id=int(job.get_id()),
        execution_id=int(execution.get_id()),
    )
    artifacts.log_path.parent.mkdir(parents=True, exist_ok=True)
    paths = (
        artifacts.log_path,
        artifacts.stats_path,
        artifacts.log_path.with_suffix(".pygea.log"),
    )
    for path in paths:
        path.write_text(f"artifact {path.name}", encoding="utf-8")
    return paths


def _execution_exists(execution: JobExecution) -> bool:
    with database.reader():
        return JobExecution.get_or_none(id=int(execution.get_id())) is not None


def test_cleanup_job_executions_prunes_old_completed_rows_and_artifacts(
    tmp_path: Path,
) -> None:
    initialize_database(tmp_path / "job-retention.db")
    log_dir = tmp_path / "out" / "logs"
    job = _create_job("Retention source")
    old_success = _create_execution(
        job,
        status=JobExecutionStatus.SUCCEEDED,
        ended_at=NOW - timedelta(days=8),
    )
    fresh_success = _create_execution(
        job,
        status=JobExecutionStatus.SUCCEEDED,
        ended_at=NOW - timedelta(days=6, hours=23),
    )
    old_failed = _create_execution(
        job,
        status=JobExecutionStatus.FAILED,
        ended_at=NOW - timedelta(days=91),
    )
    fresh_failed = _create_execution(
        job,
        status=JobExecutionStatus.FAILED,
        ended_at=NOW - timedelta(days=89),
    )
    old_canceled = _create_execution(
        job,
        status=JobExecutionStatus.CANCELED,
        ended_at=NOW - timedelta(days=91),
    )
    old_running = _create_execution(
        job,
        status=JobExecutionStatus.RUNNING,
        ended_at=None,
    )
    old_pending = _create_execution(
        job,
        status=JobExecutionStatus.PENDING,
        ended_at=None,
    )
    pruned_paths = tuple(
        path
        for execution in (old_success, old_failed, old_canceled)
        for path in _write_artifacts(log_dir, job, execution)
    )
    kept_paths = tuple(
        path
        for execution in (fresh_success, fresh_failed, old_running, old_pending)
        for path in _write_artifacts(log_dir, job, execution)
    )

    result = cleanup_job_executions(log_dir=log_dir, now=NOW)

    assert result.matched_executions == 3
    assert result.deleted_executions == 3
    assert result.matched_files == len(pruned_paths)
    assert result.deleted_files == len(pruned_paths)
    assert result.failures == 0
    assert not _execution_exists(old_success)
    assert _execution_exists(fresh_success)
    assert not _execution_exists(old_failed)
    assert _execution_exists(fresh_failed)
    assert not _execution_exists(old_canceled)
    assert _execution_exists(old_running)
    assert _execution_exists(old_pending)
    assert all(not path.exists() for path in pruned_paths)
    assert all(path.exists() for path in kept_paths)


def test_cleanup_job_executions_dry_run_leaves_rows_and_artifacts(
    tmp_path: Path,
) -> None:
    initialize_database(tmp_path / "job-retention-dry-run.db")
    log_dir = tmp_path / "out" / "logs"
    job = _create_job("Dry run source")
    execution = _create_execution(
        job,
        status=JobExecutionStatus.SUCCEEDED,
        ended_at=NOW - timedelta(days=8),
    )
    paths = _write_artifacts(log_dir, job, execution)

    result = cleanup_job_executions(log_dir=log_dir, now=NOW, dry_run=True)

    assert result.matched_executions == 1
    assert result.deleted_executions == 0
    assert result.matched_files == len(paths)
    assert result.deleted_files == 0
    assert _execution_exists(execution)
    assert all(path.exists() for path in paths)


def test_cleanup_job_executions_prunes_rows_when_artifacts_are_missing(
    tmp_path: Path,
) -> None:
    initialize_database(tmp_path / "job-retention-missing-artifacts.db")
    job = _create_job("Missing artifacts source")
    execution = _create_execution(
        job,
        status=JobExecutionStatus.FAILED,
        ended_at=NOW - timedelta(days=91),
    )

    result = cleanup_job_executions(log_dir=tmp_path / "out" / "logs", now=NOW)

    assert result.matched_executions == 1
    assert result.deleted_executions == 1
    assert result.matched_files == 0
    assert result.deleted_files == 0
    assert result.failures == 0
    assert not _execution_exists(execution)