"""扫描 worker 的同步核心 _scan_and_alert:水位读写 / 冷启动 / 发送成功推进、失败不推进。

monkeypatch 掉真正的飞书发送;用真实 SQLite(SessionLocal)插入几条记录。
"""
from __future__ import annotations

import time

import pytest

from app.core import compare_alert_worker as w
from app.db.session import SessionLocal
from app.models.app_config import AppConfig
from app.models.comparison import ComparisonRecord

WM_KEY = w.WATERMARK_KEY


@pytest.fixture()
def clean_db():
    db = SessionLocal()
    db.query(ComparisonRecord).delete()
    db.query(AppConfig).filter(AppConfig.key == WM_KEY).delete()
    db.commit()
    yield db
    db.query(ComparisonRecord).delete()
    db.query(AppConfig).filter(AppConfig.key == WM_KEY).delete()
    db.commit()
    db.close()


def _add(db, trace, status, **kw):
    rec = ComparisonRecord(trace_id=trace, status=status, **kw)
    db.add(rec)
    db.commit()
    db.refresh(rec)
    return rec


def _card_title(card: dict) -> str:
    return card.get("header", {}).get("title", {}).get("content", "")


def _card_md_content(card: dict) -> str:
    elements = card.get("body", {}).get("elements", [])
    return elements[0].get("content", "") if elements else ""


def test_cold_start_sets_watermark_no_alert(clean_db, monkeypatch):
    # 冷启动:表非空 → 水位=当前 max(updated_at),不回溯已有历史失败、不报
    _add(clean_db, "old-fail", "failed", fail_reason=None, information="比价过程出错")
    sent = []
    monkeypatch.setattr(w, "_send_card", lambda card: sent.append(card))
    w._scan_and_alert()
    assert sent == []  # 冷启动不报历史
    row = clean_db.get(AppConfig, WM_KEY)
    assert row is not None  # 水位已初始化


def test_alerts_on_new_failed_and_advances(clean_db, monkeypatch):
    # seed 一条 + 冷启动建水位;sleep 1.1s 拉开时间(SQLite 秒级精度,否则新记录同秒、追不上水位)
    _add(clean_db, "seed", "running")
    monkeypatch.setattr(w, "_send_card", lambda card: None)
    w._scan_and_alert()  # 冷启动,水位=seed.updated_at
    time.sleep(1.1)
    sent = []
    monkeypatch.setattr(w, "_send_card", lambda card: sent.append(card))
    _add(clean_db, "new-fail", "failed", fail_reason=None, information="比价过程出错")
    w._scan_and_alert()
    assert len(sent) == 1
    card = sent[0]
    # title 含关键词
    assert "比价失败报警" in _card_title(card)
    # markdown 摘要含"系统技术失败"
    assert "系统技术失败 1" in _card_md_content(card)


def test_send_failure_does_not_advance_watermark(clean_db, monkeypatch):
    _add(clean_db, "seed2", "running")
    monkeypatch.setattr(w, "_send_card", lambda card: None)
    w._scan_and_alert()  # 冷启动建水位
    wm_before = clean_db.get(AppConfig, WM_KEY).value
    time.sleep(1.1)
    _add(clean_db, "fail-send", "failed", fail_reason=None, information="比价过程出错")

    def boom(card):
        raise w.feishu_notifier.FeishuNotifyError("down")

    monkeypatch.setattr(w, "_send_card", boom)
    w._scan_and_alert()  # 发送失败
    clean_db.expire_all()
    wm_after = clean_db.get(AppConfig, WM_KEY).value
    assert wm_after == wm_before  # 未推进,下轮补发