import os
from datetime import datetime
from pathlib import Path
from zoneinfo import ZoneInfo

import pytest

from beaver_agent.memory import handouts
from beaver_agent.memory.handouts import deploy_mark

ZONE = ZoneInfo("Europe/Warsaw")
NOW = "2026-09-17 06:30"


def _at(text: str) -> float:
    return datetime.fromisoformat(text).replace(tzinfo=ZONE).timestamp()


def _touch(path: Path, when: str) -> Path:
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text("", encoding="utf-8")
    os.utime(path, (_at(when), _at(when)))
    return path


def _bundle(tmp_path: Path, started: str, code: str) -> tuple[Path, Path]:
    proc = _touch(tmp_path / "proc" / "1", started)
    package = tmp_path / "beaver_agent"
    _touch(package / "memory" / "handouts.py", code)
    _touch(package / "vault.py", "2026-09-10 12:00")
    # мусор компилятора не должен выглядеть свежим кодом
    _touch(package / "memory" / "__pycache__" / "handouts.py", "2026-09-17 06:00")
    return proc, package


@pytest.fixture(autouse=True)
def _now(monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.setattr(handouts.time, "time", lambda: _at(NOW))


def test_code_older_than_start(tmp_path: Path) -> None:
    proc, package = _bundle(tmp_path, "2026-09-16 03:11", "2026-09-16 03:03")
    assert deploy_mark(proc, package) == (
        "Выкат: процесс поднят 2026-09-16 03:11 (27 ч назад), свежесть кода "
        "2026-09-16 03:03 - код старше старта, значит крутится то, что выкатывали."
    )


def test_code_newer_than_start(tmp_path: Path) -> None:
    proc, package = _bundle(tmp_path, "2026-09-16 03:11", "2026-09-17 06:20")
    assert deploy_mark(proc, package) == (
        "Выкат: процесс поднят 2026-09-16 03:11 (27 ч назад), свежесть кода "
        "2026-09-17 06:20 - код НОВЕЕ старта: правка на диске есть, "
        "рестарта после неё не было."
    )


def test_same_minute(tmp_path: Path) -> None:
    proc, package = _bundle(tmp_path, "2026-09-17 06:00", "2026-09-17 06:00:30")
    assert deploy_mark(proc, package) == (
        "Выкат: процесс поднят 2026-09-17 06:00 (30 мин назад), свежесть кода "
        "2026-09-17 06:00 - выкат и правка в одну минуту."
    )


def test_no_source(tmp_path: Path) -> None:
    proc, package = _bundle(tmp_path, "2026-09-16 03:11", "2026-09-16 03:03")
    assert deploy_mark(tmp_path / "нет", package) is None
    assert deploy_mark(proc, tmp_path / "пусто") is None
    only_cache = tmp_path / "кеш"
    _touch(only_cache / "__pycache__" / "handouts.py", "2026-09-17 06:00")
    assert deploy_mark(proc, only_cache) is None