"""
Unit tests for the auto-sync scheduler.

The interesting behaviour is the claim: gunicorn runs several workers, each of
which starts its own timer, so without coordination one hourly tick would fire
a sync per worker.
"""
import datetime

import pytest

from services import scheduler


@pytest.fixture(autouse=True)
def _clean(db):
    db.execute("DELETE FROM job_locks")


def set_last_run(db, when):
    db.execute(
        "UPDATE job_locks SET last_run_at = ? WHERE name = ?",
        [when.isoformat(timespec="seconds"), scheduler.JOB_NAME],
    )


class TestClaim:
    def test_first_caller_gets_the_job(self, db):
        assert scheduler.claim() is True

    def test_second_caller_is_turned_away_while_the_first_holds_it(self, db, monkeypatch):
        monkeypatch.setattr(scheduler.os, "getpid", lambda: 111)
        assert scheduler.claim() is True

        # A different worker, same instant.
        monkeypatch.setattr(scheduler.os, "getpid", lambda: 222)
        assert scheduler.claim() is False, "two workers must not run the same tick"

    def test_not_due_again_within_the_interval(self, db):
        scheduler.claim()
        scheduler.release()
        assert scheduler.claim() is False

    def test_due_again_after_the_interval(self, db):
        scheduler.claim()
        scheduler.release()
        set_last_run(db, datetime.datetime.utcnow() - datetime.timedelta(seconds=7200))
        assert scheduler.claim() is True

    def test_abandoned_claim_expires(self, db, monkeypatch):
        """A worker that dies mid-run must not block the job forever."""
        monkeypatch.setattr(scheduler.os, "getpid", lambda: 111)
        scheduler.claim()

        stale = datetime.datetime.utcnow() - datetime.timedelta(
            seconds=scheduler.CLAIM_TIMEOUT_SECONDS + 60
        )
        db.execute(
            "UPDATE job_locks SET claimed_at = ? WHERE name = ?",
            [stale.isoformat(timespec="seconds"), scheduler.JOB_NAME],
        )

        monkeypatch.setattr(scheduler.os, "getpid", lambda: 222)
        assert scheduler.claim() is True

    def test_release_without_running_leaves_it_due(self, db):
        scheduler.claim()
        scheduler.release(ran=False)
        assert scheduler.claim() is True

    def test_release_after_running_records_the_time(self, db):
        scheduler.claim()
        scheduler.release()
        assert scheduler.status()["lastRunAt"] is not None


class TestSyncAllAccounts:
    def test_no_accounts_is_a_no_op(self, db, user):
        assert scheduler.sync_all_accounts() == []

    def test_syncs_every_account_holding_a_token(self, db, user, monkeypatch, make_user):
        from services import garmin as garmin_svc

        other = make_user("b@example.com")
        garmin_svc.save_token(user["id"], "t1", "a@example.com")
        garmin_svc.save_token(other["id"], "t2", "b@example.com")

        seen = []
        monkeypatch.setattr(
            garmin_svc, "sync_data",
            lambda uid, creds, days=None, client=None: seen.append(uid)
            or {"status": "success", "recordsSynced": days},
        )

        results = scheduler.sync_all_accounts(days=2)
        assert set(seen) == {user["id"], other["id"]}
        assert all(r["status"] == "success" for r in results)

    def test_one_failing_account_does_not_stop_the_others(
        self, db, user, monkeypatch, make_user
    ):
        from services import garmin as garmin_svc

        other = make_user("c@example.com")
        garmin_svc.save_token(user["id"], "t1")
        garmin_svc.save_token(other["id"], "t2")

        def flaky(uid, creds, days=None, client=None):
            if uid == user["id"]:
                raise RuntimeError("token expired")
            return {"status": "success", "recordsSynced": 2}

        monkeypatch.setattr(garmin_svc, "sync_data", flaky)
        results = scheduler.sync_all_accounts()

        assert len(results) == 2
        assert {r["status"] for r in results} == {"error", "success"}

    def test_accounts_without_a_token_are_skipped(self, db, user, monkeypatch):
        from services import garmin as garmin_svc
        called = []
        monkeypatch.setattr(
            garmin_svc, "sync_data",
            lambda *a, **k: called.append(1) or {"status": "success"},
        )
        scheduler.sync_all_accounts()
        assert called == [], "an account with no token cannot be synced"


class TestStatus:
    def test_reports_configuration(self, db):
        s = scheduler.status()
        assert s["intervalSeconds"] == scheduler.INTERVAL_SECONDS
        assert s["days"] == scheduler.SYNC_DAYS

    def test_next_run_follows_the_last(self, db):
        scheduler.claim()
        scheduler.release()
        s = scheduler.status()
        assert s["lastRunAt"] and s["nextRunAt"]
        assert s["nextRunAt"] > s["lastRunAt"]

    def test_no_run_yet(self, db):
        s = scheduler.status()
        assert s["lastRunAt"] is None
        assert s["nextRunAt"] is None


class TestEndpoints:
    def test_sync_latest_requires_auth(self, client):
        assert client.post("/api/garmin/sync-latest", json={}).status_code == 401

    def test_sync_latest_needs_a_bound_account(self, client, auth):
        r = client.post("/api/garmin/sync-latest", headers=auth, json={})
        assert r.status_code == 400
        assert "绑定" in r.get_json()["error"]

    def test_sync_latest_runs_inline(self, client, auth, user, db, monkeypatch):
        from services import garmin as garmin_svc
        garmin_svc.save_token(user["id"], "blob")
        monkeypatch.setattr(
            garmin_svc, "sync_data",
            lambda uid, creds, days=None, client=None: {
                "status": "success", "recordsSynced": days, "message": "ok",
            },
        )
        r = client.post("/api/garmin/sync-latest", headers=auth, json={"days": 3})
        assert r.status_code == 200
        assert r.get_json()["recordsSynced"] == 3

    def test_sync_latest_window_is_clamped(self, client, auth, user, db, monkeypatch):
        from services import garmin as garmin_svc
        garmin_svc.save_token(user["id"], "blob")
        monkeypatch.setattr(
            garmin_svc, "sync_data",
            lambda uid, creds, days=None, client=None: {
                "status": "success", "recordsSynced": days,
            },
        )
        r = client.post("/api/garmin/sync-latest", headers=auth, json={"days": 999})
        assert r.get_json()["recordsSynced"] == 7

    def test_auto_sync_status_endpoint(self, client, auth):
        r = client.get("/api/garmin/auto-sync", headers=auth)
        assert r.status_code == 200
        assert "intervalSeconds" in r.get_json()


class TestSyncWindowResolution:
    """Which window each account is synced over.

    `query_one` returns a dict, so reading the saved 历史范围 as `s[0]` raised
    KeyError — swallowed by the per-account handler, which meant every
    scheduled tick failed for every account that had ever opened 设置, and
    nothing was synced automatically at all.
    """

    def _account(self, user, monkeypatch):
        from services import garmin as garmin_svc

        garmin_svc.save_token(user["id"], "t1")
        seen = {}

        def record(uid, creds, days=None, client=None):
            seen["days"] = days
            return {"status": "success", "recordsSynced": 0}

        monkeypatch.setattr(garmin_svc, "sync_data", record)
        return seen

    def test_saved_history_days_is_honoured(self, db, user, monkeypatch):
        from services import settings as settings_svc

        seen = self._account(user, monkeypatch)
        settings_svc.save_settings(user["id"], {"historyDays": 90})

        results = scheduler.sync_all_accounts()
        assert [r["status"] for r in results] == ["success"]
        assert seen["days"] == 90

    def test_full_history_becomes_the_maximum(self, db, user, monkeypatch):
        from services import settings as settings_svc

        seen = self._account(user, monkeypatch)
        settings_svc.save_settings(user["id"], {"historyDays": 0})

        scheduler.sync_all_accounts()
        assert seen["days"] == 730

    def test_the_scheduled_tick_ignores_the_history_setting(
        self, db, user, monkeypatch
    ):
        """历史范围 is the window for the manual 全量同步. A half-hourly tick
        re-pulling 全部历史 is what kept the account in a 429 loop."""
        from services import settings as settings_svc

        seen = self._account(user, monkeypatch)
        settings_svc.save_settings(user["id"], {"historyDays": 0, "autoSync": True})

        scheduler.sync_all_accounts(days=scheduler.SYNC_DAYS, respect_schedule=True)
        assert seen["days"] == scheduler.SYNC_DAYS