"""
Tests for mempalace/retain_closets.py — 90-day closet retention enforcement.

Refs: #1083, #1075
"""

from __future__ import annotations

import json
import time
from pathlib import Path

import pytest

from mempalace.retain_closets import (
    RetentionResult,
    _file_age_days,
    enforce_retention,
)


# ---------------------------------------------------------------------------
# Helpers
# ---------------------------------------------------------------------------

def _write_closet(directory: Path, name: str, age_days: float) -> Path:
    """Create a *.closet.json file with a mtime set to *age_days* ago."""
    p = directory / name
    p.write_text(json.dumps({"drawers": [{"text": "summary", "closet": True}]}))
    # Set mtime to simulate age
    mtime = time.time() - age_days * 86400.0
    import os
    os.utime(p, (mtime, mtime))
    return p


# ---------------------------------------------------------------------------
# _file_age_days
# ---------------------------------------------------------------------------

def test_file_age_days_recent(tmp_path):
    p = tmp_path / "recent.closet.json"
    p.write_text("{}")
    age = _file_age_days(p)
    assert 0 <= age < 1  # just created


def test_file_age_days_old(tmp_path):
    p = _write_closet(tmp_path, "old.closet.json", age_days=100)
    age = _file_age_days(p)
    assert 99 < age < 101


# ---------------------------------------------------------------------------
# enforce_retention — dry_run
# ---------------------------------------------------------------------------

def test_dry_run_does_not_delete(tmp_path):
    old = _write_closet(tmp_path, "old.closet.json", age_days=100)
    _write_closet(tmp_path, "new.closet.json", age_days=10)

    result = enforce_retention(tmp_path, retention_days=90, dry_run=True)

    # File still exists after dry-run
    assert old.exists()
    assert result.removed == 1  # counted but not actually removed
    assert result.kept == 1
    assert result.ok


def test_dry_run_keeps_recent_files(tmp_path):
    _write_closet(tmp_path, "recent.closet.json", age_days=5)
    result = enforce_retention(tmp_path, retention_days=90, dry_run=True)
    assert result.removed == 0
    assert result.kept == 1


# ---------------------------------------------------------------------------
# enforce_retention — live mode
# ---------------------------------------------------------------------------

def test_live_removes_old_closets(tmp_path):
    old = _write_closet(tmp_path, "old.closet.json", age_days=100)
    new = _write_closet(tmp_path, "new.closet.json", age_days=10)

    result = enforce_retention(tmp_path, retention_days=90, dry_run=False)

    assert not old.exists()
    assert new.exists()
    assert result.removed == 1
    assert result.kept == 1
    assert result.ok


def test_live_keeps_files_within_window(tmp_path):
    f = _write_closet(tmp_path, "edge.closet.json", age_days=89)
    result = enforce_retention(tmp_path, retention_days=90, dry_run=False)
    assert f.exists()
    assert result.removed == 0
    assert result.kept == 1


def test_empty_directory_is_ok(tmp_path):
    result = enforce_retention(tmp_path, retention_days=90)
    assert result.scanned == 0
    assert result.removed == 0
    assert result.ok


def test_subdirectory_closets_are_pruned(tmp_path):
    """enforce_retention should recurse into subdirs (wing directories)."""
    sub = tmp_path / "bezalel"
    sub.mkdir()
    old = _write_closet(sub, "hermes.closet.json", age_days=120)
    result = enforce_retention(tmp_path, retention_days=90, dry_run=False)
    assert not old.exists()
    assert result.removed == 1


def test_non_closet_files_ignored(tmp_path):
    """Non-closet files should not be counted or touched."""
    (tmp_path / "readme.txt").write_text("hello")
    (tmp_path / "data.drawer.json").write_text("{}")
    result = enforce_retention(tmp_path, retention_days=90)
    assert result.scanned == 0


# ---------------------------------------------------------------------------
# RetentionResult.ok
# ---------------------------------------------------------------------------

def test_retention_result_ok_with_no_errors():
    r = RetentionResult(scanned=5, removed=2, kept=3)
    assert r.ok is True


def test_retention_result_not_ok_with_errors():
    r = RetentionResult(errors=["could not stat file"])
    assert r.ok is False