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

from curator import Watched, briefing, last_run, new_replies


def test_last_run_reads_first_line_or_default(tmp_path: Path) -> None:
    default = datetime(2026, 9, 1, tzinfo=UTC)
    assert last_run(tmp_path / "нет.md", default=default) == default
    j = tmp_path / "куратор.md"
    j.write_text(
        "последний прогон: 2026-09-01T18:00:00+02:00\n\n# журнал\n", encoding="utf-8"
    )
    assert last_run(j, default=default) == datetime(2026, 9, 1, 16, 0, tzinfo=UTC)
    j.write_text("# журнал без строки\n", encoding="utf-8")
    assert last_run(j, default=default) == default


def test_briefing_lists_new_replies_and_changed_files_or_nothing(
    tmp_path: Path,
) -> None:
    vault = tmp_path
    beaver = vault / "мета" / "бобер"
    replies = beaver / "реплики"
    notes = beaver / "наблюдения"
    replies.mkdir(parents=True)
    notes.mkdir()
    (replies / "2026-09.md").write_text(
        "# реплики\n\n- 2026-09-01 12:00 · мастер · старое\n- 2026-09-01 19:30 · мастер · новое сообщение\n",
        encoding="utf-8",
    )
    journal = beaver / "куратор.md"
    journal.write_text(
        "последний прогон: 2026-09-01T18:00:00+02:00\n", encoding="utf-8"
    )
    old = notes / "Глафира - наблюдения.md"
    old.write_text("# Глафира\n", encoding="utf-8")
    import os

    stale = (datetime(2026, 9, 1, 10, tzinfo=UTC)).timestamp()
    os.utime(old, (stale, stale))
    fresh = notes / "Зина - наблюдения.md"
    fresh.write_text(
        "# Зина\n## лента\n- 2026-09-01 · факт · [[2026-09-01]]\n", encoding="utf-8"
    )
    now = datetime(2026, 9, 1, 20, 0, tzinfo=UTC)
    recent = (now - timedelta(minutes=30)).timestamp()
    os.utime(fresh, (recent, recent))
    text = briefing(
        vault=vault,
        journal=journal,
        replies_dir=replies,
        watched=[Watched("наблюдения", notes)],
        tz="Europe/Warsaw",
        now=now,
    )
    assert text is not None
    assert "прошлый - 2026-09-01 18:00" in text
    assert (
        "Новые реплики Бобра (1):\n- 2026-09-01 19:30 · мастер · новое сообщение"
        in text
    )
    assert "наблюдения: `мета/бобер/наблюдения/Зина - наблюдения.md`" in text
    assert "Глафира" not in text
    assert "последний прогон: 2026-09-01T22:00:00+02:00" in text

    journal.write_text(f"последний прогон: {now.isoformat()}\n", encoding="utf-8")
    assert new_replies(replies, now, "Europe/Warsaw") == []
    later = now + timedelta(hours=1)
    assert (
        briefing(
            vault=vault,
            journal=journal,
            replies_dir=replies,
            watched=[Watched("наблюдения", notes)],
            tz="Europe/Warsaw",
            now=later,
        )
        is None
    )