"""Offline unit tests for run_domclick_city_sweep orchestration (JSON API rewrite).

Pure & fast: NO live network, NO DB.

Coverage:
  - fetch_city вызывается, save_listings получает lots с source='domklik'
  - DomClickCitySweepCounters корректно заполняется
  - Cooperative cancel прерывает sweep перед SERP
  - fetch_city exception → errors_count++; 0 lots + errors → mark_failed (#1968)
  - Успешный sweep (lots > 0) → mark_done
  - Пустой SERP (0 lots, 0 errors) → mark_done (не ошибка)
  - DomClickBlockedError в фазе → errors_count++; 0 lots → mark_failed
"""

from __future__ import annotations

import os

os.environ.setdefault("DATABASE_URL", "postgresql+psycopg://test:test@localhost:5432/test")

from typing import Any
from unittest.mock import MagicMock

import pytest

from app.services import scrape_pipeline
from app.services.scrapers.base import ScrapedLot
from app.services.scrapers.domclick import DomClickScraper
from app.services.scrapers.domclick_exceptions import DomClickBlockedError


def _fake_lot(offer_id: str) -> ScrapedLot:
    return ScrapedLot(
        source="domklik",
        source_url=f"https://domclick.ru/card/sale__flat__{offer_id}",
        source_id=offer_id,
        address="Екатеринбург, улица Тестовая, 1",
        price_rub=5_000_000,
        area_m2=50.0,
        rooms=2,
        lat=56.83,
        lon=60.61,
    )


class _FakeRuns:
    """Stub для scrape_runs: отслеживает вызовы, поддерживает cooperative cancel."""

    def __init__(self, *, cancel: bool = False) -> None:
        self.cancel = cancel
        self.heartbeats: list[dict[str, int]] = []
        self.done: dict[str, int] | None = None
        self.failed: tuple[str, dict[str, int]] | None = None

    def is_cancelled(self, _db: Any, _run_id: int) -> bool:
        return self.cancel

    def update_heartbeat(self, _db: Any, _run_id: int, counters: dict[str, int]) -> None:
        self.heartbeats.append(dict(counters))

    def mark_done(self, _db: Any, _run_id: int, counters: dict[str, int]) -> None:
        self.done = dict(counters)

    def mark_failed(self, _db: Any, _run_id: int, error: str, counters: dict[str, int]) -> None:
        self.failed = (error, dict(counters))


@pytest.fixture(autouse=True)
def _no_sleep(monkeypatch: pytest.MonkeyPatch) -> None:
    async def _instant(_secs: float) -> None:
        return None

    monkeypatch.setattr(scrape_pipeline.asyncio, "sleep", _instant)


@pytest.fixture(autouse=True)
def _stub_domclick_lifecycle(monkeypatch: pytest.MonkeyPatch) -> None:
    """Нейтрализуем DomClickScraper.__init__/__aenter__/__aexit__ — нет DB/browser."""

    def _init(self: DomClickScraper) -> None:
        self.request_delay_sec = 0.0
        self.parse_failures = 0
        self._browser = None

    async def _aenter(self: DomClickScraper) -> DomClickScraper:
        return self

    async def _aexit(self: DomClickScraper, *_args: Any) -> None:
        return None

    monkeypatch.setattr(DomClickScraper, "__init__", _init)
    monkeypatch.setattr(DomClickScraper, "__aenter__", _aenter)
    monkeypatch.setattr(DomClickScraper, "__aexit__", _aexit)


def _install_runs(monkeypatch: pytest.MonkeyPatch, fake: _FakeRuns) -> None:
    monkeypatch.setattr(scrape_pipeline.scrape_runs, "is_cancelled", fake.is_cancelled)
    monkeypatch.setattr(scrape_pipeline.scrape_runs, "update_heartbeat", fake.update_heartbeat)
    monkeypatch.setattr(scrape_pipeline.scrape_runs, "mark_done", fake.mark_done)
    monkeypatch.setattr(scrape_pipeline.scrape_runs, "mark_failed", fake.mark_failed)


# ── DomClickCitySweepCounters ───────────────────────────────────────────────


def test_domclick_sweep_counters_defaults() -> None:
    from app.services.scrape_pipeline import DomClickCitySweepCounters

    c = DomClickCitySweepCounters()
    assert c.lots_fetched == 0
    assert c.lots_inserted == 0
    assert c.lots_updated == 0
    assert c.pages_fetched == 0
    assert c.errors_count == 0


def test_domclick_sweep_counters_to_dict_all_keys() -> None:
    from dataclasses import fields

    from app.services.scrape_pipeline import DomClickCitySweepCounters

    c = DomClickCitySweepCounters()
    d = c.to_dict()
    expected = {f.name for f in fields(c)}
    assert set(d.keys()) == expected


# ── Full sweep — фазы и агрегация ──────────────────────────────────────────


async def test_sweep_fetches_and_saves_calls_mark_done(monkeypatch: pytest.MonkeyPatch) -> None:
    """fetch_city → 2 lots → save_listings → mark_done (не mark_failed)."""
    fetch_calls: list[tuple[int, int]] = []
    save_calls: list[list[ScrapedLot]] = []

    async def fake_fetch_city(
        self: DomClickScraper,
        city_id: int,
        rooms: list[int] | None = None,
        pages: int = 100,
    ) -> list[ScrapedLot]:
        fetch_calls.append((city_id, pages))
        return [_fake_lot("100"), _fake_lot("101")]

    def fake_save(_db: Any, lots: list, *, run_id: int | None = None) -> tuple[int, int]:
        save_calls.append(list(lots))
        return len(lots), 0

    monkeypatch.setattr(DomClickScraper, "fetch_city", fake_fetch_city)
    monkeypatch.setattr(scrape_pipeline, "save_listings", fake_save)

    fake = _FakeRuns()
    _install_runs(monkeypatch, fake)

    counters = await scrape_pipeline.run_domclick_city_sweep(
        db=MagicMock(),
        run_id=1,
        city_id=4,
        rooms=[1, 2],
        pages=3,
        request_delay_sec=0.0,
    )

    assert len(fetch_calls) == 1
    assert fetch_calls[0] == (4, 3)
    assert len(save_calls) == 1
    assert len(save_calls[0]) == 2
    assert all(lot.source == "domklik" for lot in save_calls[0])
    assert counters.lots_fetched == 2
    assert counters.lots_inserted == 2
    assert counters.lots_updated == 0
    assert counters.errors_count == 0
    # Успешный sweep → mark_done, НЕ mark_failed
    assert fake.done is not None
    assert fake.done["lots_fetched"] == 2
    assert fake.failed is None


async def test_sweep_empty_serp_no_errors_mark_done(monkeypatch: pytest.MonkeyPatch) -> None:
    """Пустой SERP (0 lots, 0 errors) → mark_done (не ошибка, не mark_failed)."""
    save_called = False

    async def fake_fetch_empty(
        self: DomClickScraper,
        city_id: int,
        rooms: list[int] | None = None,
        pages: int = 100,
    ) -> list[ScrapedLot]:
        return []

    def fake_save(_db: Any, lots: list, *, run_id: int | None = None) -> tuple[int, int]:
        nonlocal save_called
        save_called = True
        return 0, 0

    monkeypatch.setattr(DomClickScraper, "fetch_city", fake_fetch_empty)
    monkeypatch.setattr(scrape_pipeline, "save_listings", fake_save)

    fake = _FakeRuns()
    _install_runs(monkeypatch, fake)

    counters = await scrape_pipeline.run_domclick_city_sweep(
        db=MagicMock(), run_id=2, request_delay_sec=0.0
    )

    assert save_called is False
    assert counters.lots_fetched == 0
    assert counters.errors_count == 0
    # 0 lots + 0 errors → mark_done (не mark_failed)
    assert fake.done is not None
    assert fake.failed is None


async def test_cancel_before_serp_skips_fetch(monkeypatch: pytest.MonkeyPatch) -> None:
    """Cooperative cancel перед SERP → fetch_city НЕ вызывается, mark_done НЕ вызывается."""
    fetch_called = False

    async def fake_fetch(
        self: DomClickScraper,
        city_id: int,
        rooms: list[int] | None = None,
        pages: int = 100,
    ) -> list[ScrapedLot]:
        nonlocal fetch_called
        fetch_called = True
        return [_fake_lot("1")]

    monkeypatch.setattr(DomClickScraper, "fetch_city", fake_fetch)
    monkeypatch.setattr(scrape_pipeline, "save_listings", lambda *a, **k: (0, 0))

    fake = _FakeRuns(cancel=True)
    _install_runs(monkeypatch, fake)

    counters = await scrape_pipeline.run_domclick_city_sweep(
        db=MagicMock(), run_id=3, request_delay_sec=0.0
    )

    assert fetch_called is False
    assert counters.lots_fetched == 0
    assert fake.done is None


async def test_fetch_city_exception_triggers_mark_failed(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    """Исключение в fetch_city → errors_count++; 0 lots + errors → mark_failed (#1968)."""

    async def fake_fetch_fail(
        self: DomClickScraper,
        city_id: int,
        rooms: list[int] | None = None,
        pages: int = 100,
    ) -> list[ScrapedLot]:
        raise RuntimeError("network error")

    monkeypatch.setattr(DomClickScraper, "fetch_city", fake_fetch_fail)
    monkeypatch.setattr(scrape_pipeline, "save_listings", lambda *a, **k: (0, 0))

    fake = _FakeRuns()
    _install_runs(monkeypatch, fake)

    counters = await scrape_pipeline.run_domclick_city_sweep(
        db=MagicMock(), run_id=4, request_delay_sec=0.0
    )

    assert counters.errors_count == 1
    assert counters.lots_fetched == 0
    # 0 lots + errors → mark_failed, НЕ mark_done
    assert fake.failed is not None, "mark_failed должен быть вызван при 0 lots + errors"
    assert fake.done is None


async def test_domclick_blocked_triggers_mark_failed(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    """DomClickBlockedError в fetch_city → errors_count++; 0 lots → mark_failed."""

    async def fake_fetch_blocked(
        self: DomClickScraper,
        city_id: int,
        rooms: list[int] | None = None,
        pages: int = 100,
    ) -> list[ScrapedLot]:
        raise DomClickBlockedError("QRATOR blocked")

    monkeypatch.setattr(DomClickScraper, "fetch_city", fake_fetch_blocked)
    monkeypatch.setattr(scrape_pipeline, "save_listings", lambda *a, **k: (0, 0))

    fake = _FakeRuns()
    _install_runs(monkeypatch, fake)

    counters = await scrape_pipeline.run_domclick_city_sweep(
        db=MagicMock(), run_id=5, request_delay_sec=0.0
    )

    assert counters.errors_count == 1
    assert counters.lots_fetched == 0
    assert fake.failed is not None
    assert fake.done is None


async def test_lots_but_errors_still_mark_done(monkeypatch: pytest.MonkeyPatch) -> None:
    """Если лоты собраны (>0), но были partial errors → всё равно mark_done."""
    # Этот случай не тривиален — errors могут прийти при save_listings, но
    # lots_fetched > 0. В нашей логике: lots_fetched>0 → mark_done.

    async def fake_fetch_partial(
        self: DomClickScraper,
        city_id: int,
        rooms: list[int] | None = None,
        pages: int = 100,
    ) -> list[ScrapedLot]:
        return [_fake_lot("200")]

    fake_save_calls = [0]

    def fake_save_ok(_db: Any, lots: list, *, run_id: int | None = None) -> tuple[int, int]:
        fake_save_calls[0] += 1
        return 1, 0

    monkeypatch.setattr(DomClickScraper, "fetch_city", fake_fetch_partial)
    monkeypatch.setattr(scrape_pipeline, "save_listings", fake_save_ok)

    fake = _FakeRuns()
    _install_runs(monkeypatch, fake)

    counters = await scrape_pipeline.run_domclick_city_sweep(
        db=MagicMock(), run_id=6, request_delay_sec=0.0
    )

    assert counters.lots_fetched == 1
    # Успешно → mark_done
    assert fake.done is not None
    assert fake.failed is None