"""租约兜底回收：漏释放、孤儿批次、TTL 到期。

主释放路径是任务终态钩子（有单独用例）；这里守的是**保险丝**：
进程重启、释放抛异常、任务行被清 —— 这三种情况下账号不能永远被锁着。
"""

from __future__ import annotations

from datetime import UTC, datetime, timedelta

from tests.support.db import get_test_engine, make_test_session
from web.backend.models import (
    Account,
    AccountLease,
    AutomationJob,
    DouyuTask,
    User,
)
from web.backend.services import account_pool as pool
from web.backend.services.automation.jobs import account_lease_reaper as reaper

NOW = datetime.now(UTC).replace(microsecond=0)


class _ReaperBase:
    def setup_method(self):
        self.engine = get_test_engine()
        self.session = make_test_session(self.engine)
        self.user = User(username="reap-kf", password_hash="h", role="support")
        self.session.add(self.user)
        self.session.flush()
        self.user_id = self.user.id

    def teardown_method(self):
        self.session.close()

    def _lease(
        self, name: str, *, batch_id: str = "", ttl_minutes: int = 60
    ) -> AccountLease:
        account = Account(
            username=name,
            password="p",
            email="e@e.com",
            email_password="ep",
            status="active",
            ck_check_status="valid",
            cookie="PHPSESSID=x",
            elite_opened=True,
            points=5000,
        )
        self.session.add(account)
        self.session.commit()
        lease = pool.lease_accounts(
            self.session,
            holder_user_id=self.user_id,
            candidates=[
                pool.make_candidate(
                    account_id=account.id,
                    username=name,
                    points=5000,
                    score=1280,
                )
            ],
            commodity_id="20260101X_bag1",
            batch_id=batch_id,
            ttl_minutes=ttl_minutes,
            now=NOW,
        )[0]
        return lease

    def _task(self, batch_id: str, account_id: int, status: str):
        self.session.add(
            DouyuTask(
                batch_id=batch_id,
                account_id=account_id,
                task_type="exchange_goods",
                handbook_scope="elite",
                status=status,
                created_by=self.user_id,
            )
        )
        self.session.commit()

    def _status(self, lease_id: int) -> str:
        self.session.rollback()
        lease = self.session.get(AccountLease, lease_id)
        assert lease is not None
        return lease.status


class TestReapMissedReleases(_ReaperBase):
    def test_releases_when_batch_has_no_active_task(self):
        lease = self._lease("m1", batch_id="batch-m1")
        self._task("batch-m1", lease.account_id, "success")

        assert pool.reap_missed_releases(self.session) == 1
        assert self._status(lease.id) == "released"

    def test_keeps_lease_while_batch_still_running(self):
        lease = self._lease("m2", batch_id="batch-m2")
        self._task("batch-m2", lease.account_id, "running")

        assert pool.reap_missed_releases(self.session) == 0
        assert self._status(lease.id) == "active"

    def test_keeps_lease_when_batch_not_created_yet(self):
        """租约刚建、任务还没建出来（batch_id 为空）—— 不能当成漏释放。"""
        lease = self._lease("m3", batch_id="")
        assert pool.reap_missed_releases(self.session) == 0
        assert self._status(lease.id) == "active"

    def test_one_running_task_protects_the_whole_batch(self):
        first = self._lease("m4a", batch_id="batch-m4")
        second = self._lease("m4b", batch_id="batch-m4")
        self._task("batch-m4", first.account_id, "success")
        self._task("batch-m4", second.account_id, "pending")

        # 批次里还有 pending → 两条都不动（正在跑的那条可能还没结束）
        assert pool.reap_missed_releases(self.session) == 0
        assert self._status(first.id) == "active"


class TestReaperJob(_ReaperBase):
    def test_expires_ttl_leases(self):
        lease = self._lease("j1", batch_id="batch-j1", ttl_minutes=1)
        self._task("batch-j1", lease.account_id, "running")

        job = AutomationJob(key=reaper.JOB_KEY, batch_size=100)
        result = reaper.run_account_lease_reaper(
            self.session, job, now=NOW + timedelta(minutes=5)
        )

        assert result["expired"] >= 1
        assert self._status(lease.id) == "expired"

    def test_releases_orphan_batch(self):
        """注册表里没有这个批次（模拟进程重启）→ 即使任务还是 running 也要收。"""
        lease = self._lease("j2", batch_id="batch-gone")
        self._task("batch-gone", lease.account_id, "running")

        job = AutomationJob(key=reaper.JOB_KEY, batch_size=100)
        result = reaper.run_account_lease_reaper(self.session, job)

        assert result["orphan_batch"] >= 1
        assert self._status(lease.id) == "expired"

    def test_message_is_honest_about_counts(self):
        self._lease("j3", batch_id="batch-j3", ttl_minutes=1)
        job = AutomationJob(key=reaper.JOB_KEY, batch_size=100)
        result = reaper.run_account_lease_reaper(self.session, job)
        assert result["scanned"] == (
            result["expired"] + result["missed_release"] + result["orphan_batch"]
        )
        assert "租约回收" in result["message"]

    def test_idempotent_second_run_finds_nothing(self):
        lease = self._lease("j4", batch_id="batch-gone")
        self._task("batch-gone", lease.account_id, "running")
        job = AutomationJob(key=reaper.JOB_KEY, batch_size=100)
        reaper.run_account_lease_reaper(self.session, job)
        second = reaper.run_account_lease_reaper(self.session, job)
        assert second["scanned"] == 0
        assert self._status(lease.id) == "expired"

    def test_freed_account_becomes_available_again(self):
        lease = self._lease("j5", batch_id="batch-gone")
        account_id = lease.account_id
        job = AutomationJob(key=reaper.JOB_KEY, batch_size=100)
        reaper.run_account_lease_reaper(self.session, job)

        candidates = pool.eligible_accounts(
            self.session,
            score=1280,
            commodity_id="20260101X_bag1",
            now=NOW + timedelta(minutes=5),
        )
        assert account_id in {c.account_id for c in candidates}