"""B9a 演示/运维脚本单测（开发计划 B9a · sqlite）。

rebuild_alerts：补偿重放出单并推送、幂等跳过（防重复 append/aml 重复出单）、
missing 不落库；subscribe_alerts：payload → 单行可读文本。
脚本目录非包，动态入 sys.path 后按模块名导入。
"""

import sys
from datetime import datetime
from decimal import Decimal
from pathlib import Path

import pytest
from sqlalchemy import text

from _ddl import create_sqlite_engine

DEMO_DIR = Path(__file__).resolve().parents[1] / "scripts" / "demo"
sys.path.insert(0, str(DEMO_DIR))

from rebuild_alerts import rebuild_trade  # noqa: E402
from subscribe_alerts import format_alert  # noqa: E402

from app.repository.core_ro import CoreReadOnlyRepository
from app.repository.risk_repository import RiskRepository
from app.service.risk import alert_service


class FakePublisher:
    def __init__(self):
        self.messages = []

    def publish(self, channel, payload):
        self.messages.append((channel, payload))


@pytest.fixture()
def env():
    engine = create_sqlite_engine()
    with engine.begin() as conn:
        conn.execute(
            text(
                "INSERT INTO core_customer (customer_id, display_name, age, is_active) VALUES"
                " ('C1', '张某某', 40, 1), ('C2', '李四', 35, 1)"
            )
        )
        conn.execute(
            text(
                "INSERT INTO core_product (product_id, product_name, min_risk_code, product_type)"
                " VALUES ('P1', '测试混合基金', 'R3', 'mixed')"
            )
        )
        conn.execute(
            text(
                "INSERT INTO risk_aml_list (list_id, list_type, full_name, match_threshold,"
                " source, list_version, is_active) VALUES ('PEP-1', 'pep', '李四', 0.85, 'mock', 'v1', 1)"
            )
        )
    core = CoreReadOnlyRepository(engine=engine)
    repo = RiskRepository(engine=engine)
    pub = FakePublisher()
    alert_service.set_publisher(pub)
    yield core, repo, pub, engine
    alert_service.set_publisher(None)
    engine.dispose()


def _seed_trade(conn, trade_id, amount, customer="C1", at=datetime(2026, 9, 6, 14, 0, 0)):
    """直接落 core_trade 不调引擎（engine_error 补偿场景：交易已成立、预警缺失）。"""
    conn.execute(
        text(
            "INSERT INTO core_trade (trade_id, customer_id, product_id, trade_type, amount,"
            " trade_status, traded_at) VALUES (:tid, :cid, 'P1', 'subscribe', :amt, 'confirmed', :at)"
        ),
        {"tid": trade_id, "cid": customer, "amt": amount, "at": at},
    )


def _counts(engine, table, where="1=1"):
    with engine.connect() as conn:
        return conn.execute(text(f"SELECT COUNT(*) FROM {table} WHERE {where}")).scalar_one()


def test_rebuild_creates_alert_and_publishes(env):
    core, repo, pub, engine = env
    with engine.begin() as conn:
        _seed_trade(conn, "TRD-TEST-RB1", "600000")
    out = rebuild_trade("TRD-TEST-RB1", core, repo)
    assert out["state"] == "rebuilt"
    assert out["triggered_rules"] == ["RISK-001", "RISK-002"]
    assert len(out["alert_ids"]) == 1 and out["aml_hit"] is False
    alert = repo.get_alert(out["alert_ids"][0])
    assert alert["status"] == "pending_review" and alert["risk_score"] == 70
    (channel, _), = pub.messages
    assert channel == "risk:pub:alert"


def test_rebuild_idempotent_skips_second_run(env):
    core, repo, pub, engine = env
    with engine.begin() as conn:
        _seed_trade(conn, "TRD-TEST-RB2", "600000")
    first = rebuild_trade("TRD-TEST-RB2", core, repo)
    second = rebuild_trade("TRD-TEST-RB2", core, repo)
    assert first["state"] == "rebuilt" and second["state"] == "skipped"
    assert second["alert_ids"] == first["alert_ids"]
    assert _counts(engine, "risk_alert") == 1
    assert len(repo.get_alert(first["alert_ids"][0])["payload"]["events"]) == 1
    assert len(pub.messages) == 1  # 重放不重复推送


def test_rebuild_missing_trade_touches_nothing(env):
    core, repo, pub, engine = env
    out = rebuild_trade("TRD-NO-SUCH", core, repo)
    assert out["state"] == "missing" and out["alert_ids"] == []
    assert _counts(engine, "risk_alert") == 0
    assert _counts(engine, "audit_log") == 0
    assert pub.messages == []


def test_rebuild_aml_hit_then_idempotent(env):
    """aml 单幂等是 LIKE 检查的关键价值：record_aml_alert 本身无去重，重放防二次出单。"""
    core, repo, pub, engine = env
    with engine.begin() as conn:
        _seed_trade(conn, "TRD-TEST-RB3", "1000", customer="C2")
    first = rebuild_trade("TRD-TEST-RB3", core, repo)
    assert first["state"] == "rebuilt" and first["aml_hit"] is True
    aml_ids = [
        aid
        for aid in first["alert_ids"]
        if repo.get_alert(aid)["alert_type"] == "aml"
    ]
    assert aml_ids
    second = rebuild_trade("TRD-TEST-RB3", core, repo)
    assert second["state"] == "skipped" and second["alert_ids"] == first["alert_ids"]
    assert _counts(engine, "risk_alert", "alert_type='aml'") == 1


def test_format_alert_renders_payload_fields():
    line = format_alert(
        {
            "alert_id": "ALT-20260906-ABC",
            "alert_type": "aml",
            "customer_id_mask": "CUST-9**",
            "risk_score": 95,
            "trace_id": "tr-1",
            "notify_role": ["risk_officer", "compliance"],
        }
    )
    for frag in ("aml", "ALT-20260906-ABC", "score=95", "CUST-9**", "tr-1",
                 "risk_officer,compliance"):
        assert frag in line
    assert "CUST-9527" not in line  # payload 只有脱敏掩码，无原始 id