"""风控集成测试（B8 · PRD §8 验收 A-1~A-5/A-7/A-9 + trace 一致性 + 审计 JSON）。

真链路：TestClient(main app)（路由 + trace 中间件 + lifespan）→ 真本机 MySQL
（jinrong_core/jinrong_agent，演示数据就位校验见 conftest.ensure_risk_demo_ready）。
仅注入两点：trade_gateway._new_trade_id 统一 TRD-TEST- 前缀（teardown 按前缀
清理，B5 评审 P3-2）；redis_gateway fake（断言推送，不依赖本机 Redis）。
用例间按演示时间线顺序耦合（A-3 产生的预警单供 A-7 处置），模块内保序。
"""

from __future__ import annotations

import json
from uuid import uuid4

import pytest
from fastapi.testclient import TestClient
from sqlalchemy import text

from conftest import ensure_risk_demo_ready

from app.config.settings import settings  # noqa: E402
from app.gateway import trade_gateway  # noqa: E402
from app.main import app  # noqa: E402
from app.service.risk import redis_gateway  # noqa: E402

ensure_risk_demo_ready()

OFFICER = {"X-Debug-Role": "risk_officer", "X-Debug-Actor": "STAFF-90001"}
COMPLIANCE = {"X-Debug-Role": "compliance", "X-Debug-Actor": "STAFF-40001"}
CUSTOMER_1001 = {"X-Debug-Role": "customer", "X-Debug-Actor": "CUST-1001"}
CUSTOMER_1002 = {"X-Debug-Role": "customer", "X-Debug-Actor": "CUST-1002"}
# simulate 交易白名单：risk_demo 演示账号或客户本人（FR-1 鉴权）
DEMO = {"X-Debug-Role": "risk_demo", "X-Debug-Actor": "STAFF-DEMO"}
# STAFF-10087 真实存在但名下无 CUST-3001（归属表 28 行分布于 5 个 advisor）
ADVISOR_10087 = {"X-Debug-Role": "advisor", "X-Debug-Actor": "STAFF-10087"}

# 演示时间线状态（A-1/A-3 产物供 A-7 审计与处置用例续用）
_state: dict[str, str] = {}


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

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

    def delete(self, *keys):
        self.deletes.append(keys)


def _test_trade_id(now):
    """集成交易统一 TRD-TEST- 前缀（conftest teardown 定位清理）。"""
    return f"TRD-TEST-{uuid4().hex[:8].upper()}"


@pytest.fixture()
def iclient(risk_demo_env, monkeypatch):
    monkeypatch.setattr(trade_gateway, "_new_trade_id", _test_trade_id)
    fake = FakePub()
    with TestClient(app) as c:  # 真 lifespan：dev 放行 + Redis 网关注册
        monkeypatch.setattr(redis_gateway, "_gateway", fake)  # 覆盖 lifespan 注册的真网关
        yield c, fake


def _trade(customer_id, product_id, trade_type, amount):
    return {
        "customer_id": customer_id,
        "product_id": product_id,
        "trade_type": trade_type,
        "amount": amount,
    }


def _one(env, sql, **params):
    with env["agent"].connect() as conn:
        return conn.execute(text(sql), params).mappings().first()


def _core_one(env, sql, **params):
    with env["core"].connect() as conn:
        return conn.execute(text(sql), params).mappings().first()


def _audit_by_trade(env, trade_id, event_type=None):
    sql = (
        "SELECT * FROM audit_log WHERE event_type = :et"
        " AND JSON_UNQUOTE(JSON_EXTRACT(input_summary, '$.trade_id')) = :tid"
    )
    return _one(env, sql, et=event_type or "trade_request", tid=trade_id)


# ---------- 核查单⑥前置断言（B8 复审 P2-1：演示与 pytest 同日交叉防护） ----------
# 各用例对演示库当日状态有隐式假设；交叉执行时不静默产出错误结论，而是 fail 并提示处理。


def _fail_if_dirty(cond_row, message):
    assert cond_row is None, f"演示/测试同日交叉防护（核查单⑥）：{message}"


def _assert_a1_clean(env):
    """A-1 假定当日无 CUST-1001×PROD-161725 pending suitability 单：
    同日交叉时本笔会并入旧单（新 trade_id 不在 trade_id 列），断言必炸。"""
    _fail_if_dirty(
        _one(
            env,
            "SELECT alert_id FROM risk_alert WHERE customer_id = 'CUST-1001'"
            " AND alert_type = 'suitability' AND status = 'pending_review'"
            " AND payload LIKE '%PROD-161725%' AND created_at >= CURDATE()",
        ),
        "CUST-1001 今日已有 PROD-161725 pending suitability 单；"
        "先按演示 SOP 重灌或清理当日演示单后再跑集成测试",
    )


def _assert_a3_clean(env):
    """A-3 假定 CUST-3001 当日无 confirmed 交易（RISK-003 频次口径）且无当日
    pending 事件单（聚合锚点：有 pending 单则本笔 append 进旧单，规则断言漂移）。"""
    _fail_if_dirty(
        _core_one(
            env,
            "SELECT trade_id FROM core_trade WHERE customer_id = 'CUST-3001'"
            " AND trade_status = 'confirmed' AND traded_at >= CURDATE() LIMIT 1",
        ),
        "CUST-3001 今日已有 confirmed 交易（影响 RISK-002 累计/RISK-003 频次口径）",
    )
    _fail_if_dirty(
        _one(
            env,
            "SELECT alert_id FROM risk_alert WHERE customer_id = 'CUST-3001'"
            " AND alert_type IN ('large_amount','freq_trade','pattern')"
            " AND status = 'pending_review' AND created_at >= CURDATE()",
        ),
        "CUST-3001 今日已有 pending 事件类预警单（本笔会并入旧单而非新建）",
    )


def _assert_a4_clean(env):
    """A-4 假定 CUST-9527 当日无 confirmed 交易：同日交叉时首笔即可能触发规则，
    「第 3 笔才触发 / events==2」断言失真。"""
    _fail_if_dirty(
        _core_one(
            env,
            "SELECT trade_id FROM core_trade WHERE customer_id = 'CUST-9527'"
            " AND trade_status = 'confirmed' AND traded_at >= CURDATE() LIMIT 1",
        ),
        "CUST-9527 今日已有 confirmed 交易（A-4 频次计数失真）",
    )


# ---------- A-1：C1 申购 R4 → 矩阵 forbidden 阻断（含 trace 一致性） ----------


def test_a1_suit001_blocked_with_trace_consistency(iclient, risk_demo_env):
    c, fake = iclient
    env = risk_demo_env
    _assert_a1_clean(env)
    trace = f"trc-integ-{uuid4().hex[:12]}"
    r = c.post(
        "/api/simulate/trade",
        json=_trade("CUST-1001", "PROD-161725", "subscribe", 10000),
        headers={**CUSTOMER_1001, "X-Trace-Id": trace},
    )
    assert r.status_code == 200
    body = r.json()
    assert body["blocked"] is True
    # AL-05 main 契约：机器码 SUIT_RISK_MISMATCH（SUIT-001 退役）
    assert body["block_response_code"] == "SUIT_RISK_MISMATCH"
    assert r.headers["X-Trace-Id"] == trace  # 中间件透传（PRD §7.5 全链路环①）
    trade_id = body["trade_id"]
    assert trade_id.startswith("TRD-TEST-")

    # 阻断不落交易（FR-1）
    assert _core_one(env, "SELECT * FROM core_trade WHERE trade_id = :t", t=trade_id) is None
    # 校验日志 blocked，trace 一致（环②）
    slog = _one(
        env,
        "SELECT * FROM risk_suitability_log WHERE request_ref = :t",
        t=trade_id,
    )
    assert slog is not None and slog["is_blocked"] == 1 and slog["is_matched"] == 0
    assert slog["trace_id"] == trace
    # suitability 预警单生成（R-02 阻断单），trace 与请求一致
    alert = _one(env, "SELECT * FROM risk_alert WHERE trade_id = :t", t=trade_id)
    assert alert["alert_type"] == "suitability" and alert["status"] == "pending_review"
    assert alert["trace_id"] == trace
    # 审计可查（platform 阻断留痕），trace 一致
    audit = _audit_by_trade(env, trade_id, "trade_request")
    assert audit["decision"] == "suitability_blocked" and audit["trace_id"] == trace
    assert audit["agent_type"] == "platform"
    # Redis 推送 trace 一致
    pushed = [p for ch, p in fake.messages if ch == "risk:pub:alert"]
    assert any(p["alert_id"] == alert["alert_id"] and p["trace_id"] == trace for p in pushed)
    _state["a1_trade_id"] = trade_id


def test_a1_audit_input_summary_json(iclient, risk_demo_env):
    """B5 复审 L1：platform 审计 input_summary 可 JSON 解析（含阻断 reasons）。"""
    c, _ = iclient
    env = risk_demo_env
    audit = _audit_by_trade(env, _state["a1_trade_id"], "trade_request")
    summary = json.loads(audit["input_summary"])
    assert summary["trade_id"] == _state["a1_trade_id"]
    assert summary["product_id"] == "PROD-161725"
    assert summary["trade_type"] == "subscribe"
    assert summary["amount"] == "10000"
    assert summary["block_response_code"] == "SUIT_RISK_MISMATCH"  # AL-05 main 契约
    assert isinstance(summary["reasons"], list) and summary["reasons"]


# ---------- A-2：70 岁 C5 买 R4 → FM-01 网点确认阻断（替换 SUIT-006 封顶） ----------


def test_a2_age70_cap_suit006_no_suit008(iclient, risk_demo_env):
    c, _ = iclient
    env = risk_demo_env
    r = c.post(
        "/api/simulate/trade",
        json=_trade("CUST-4001", "PROD-161725", "subscribe", 20000),
        headers={**DEMO, "X-Trace-Id": f"trc-integ-{uuid4().hex[:12]}"},
    )
    assert r.status_code == 200
    body = r.json()
    assert body["blocked"] is True
    # AL-05 main 契约：≥70 买 R3+ 一律阻断待网点当面确认（FM-01 替换 SUIT-006 封顶）
    assert body["block_response_code"] == "SUIT_AGE_CONFIRM"
    assert body["needs_branch_confirm"] is True
    assert any("网点当面确认" in x for x in body["reasons"]), body["reasons"]
    trade_id = body["trade_id"]
    assert _core_one(env, "SELECT * FROM core_trade WHERE trade_id = :t", t=trade_id) is None
    _state["a2_trade_id"] = trade_id


# ---------- A-3：C3 单笔 50 万 R3 → 放行 + RISK-001/002 预警 + 推送 ----------


def test_a3_large_amount_alert_and_publish(iclient, risk_demo_env):
    c, fake = iclient
    env = risk_demo_env
    _assert_a3_clean(env)
    r = c.post(
        "/api/simulate/trade",
        json=_trade("CUST-3001", "PROD-510300", "subscribe", 500000),
        headers=DEMO,
    )
    assert r.status_code == 200
    body = r.json()
    assert body["blocked"] is False
    assert body["triggered_rules"] == ["RISK-001", "RISK-002"]
    assert body["aml_hit"] is False
    trade_id = body["trade_id"]
    alert_id = body["alert_ids"][0]

    assert _core_one(env, "SELECT * FROM core_trade WHERE trade_id = :t", t=trade_id) is not None
    alert = _one(env, "SELECT * FROM risk_alert WHERE alert_id = :a", a=alert_id)
    assert alert["status"] == "pending_review" and alert["risk_score"] == 70
    assert json.loads(alert["triggered_rules"]) == ["RISK-001", "RISK-002"]
    pushed = [p for ch, p in fake.messages if ch == "risk:pub:alert"]
    assert any(p["alert_id"] == alert_id for p in pushed)
    # 放行审计全量引擎输出（B5 复审 L1）
    audit = _audit_by_trade(env, trade_id, "trade_request")
    assert audit["decision"] == "trade_accepted"
    summary = json.loads(audit["input_summary"])
    assert summary["triggered_rules"] == ["RISK-001", "RISK-002"]
    assert summary["alert_ids"] == [alert_id]
    _state["a3_alert_id"] = alert_id
    _state["a3_trade_id"] = trade_id


# ---------- A-4：同产品当日第 3 笔 → freq 并入当日预警单 ----------


def test_a4_freq_trade_merged_into_same_alert(iclient, risk_demo_env):
    c, _ = iclient
    env = risk_demo_env
    _assert_a4_clean(env)
    alert_id = None
    for _ in range(3):
        r = c.post(
            "/api/simulate/trade",
            json=_trade("CUST-9527", "PROD-510300", "subscribe", 1000),
            headers=DEMO,
        )
        assert r.status_code == 200
        body = r.json()
        assert body["blocked"] is False
        if body["triggered_rules"]:
            assert body["triggered_rules"] == ["RISK-003"]
            alert_id = body["alert_ids"][0]
    assert alert_id, "第 3 笔应触发 RISK-003"

    # 第 4 笔：并入既有单，不另开新单（PRD FR-4）
    r = c.post(
        "/api/simulate/trade",
        json=_trade("CUST-9527", "PROD-510300", "subscribe", 1000),
        headers=DEMO,
    )
    body = r.json()
    assert body["blocked"] is False and body["triggered_rules"] == ["RISK-003"]
    assert body["alert_ids"] == [alert_id]
    alerts = _one(
        env,
        "SELECT COUNT(*) AS n FROM risk_alert WHERE customer_id = 'CUST-9527'"
        " AND alert_type = 'freq_trade' AND created_at >= CURDATE()",
    )
    assert alerts["n"] == 1
    row = _one(env, "SELECT payload FROM risk_alert WHERE alert_id = :a", a=alert_id)
    assert len(json.loads(row["payload"])["events"]) == 2


# ---------- A-5：AML 命中 → 独立单 + L3 high + compliance 可见 + 不冻户 ----------


def test_a5_aml_hit_independent_alert(iclient, risk_demo_env):
    c, fake = iclient
    env = risk_demo_env
    r = c.post(
        "/api/simulate/trade",
        json=_trade("CUST-1002", "PROD-005828", "subscribe", 100),  # C2+R2 匹配，不阻断
        headers=DEMO,
    )
    assert r.status_code == 200
    body = r.json()
    assert body["blocked"] is False and body["aml_hit"] is True
    trade_id = body["trade_id"]

    # aml 单按本测试 trade_id 定位（核查单⑥：同日旧 aml 单不得干扰断言）
    alert = _one(
        env,
        "SELECT * FROM risk_alert WHERE customer_id = 'CUST-1002' AND alert_type = 'aml'"
        " AND trade_id = :t",
        t=trade_id,
    )
    assert alert is not None
    assert alert["risk_score"] == 95 and alert["status"] == "pending_review"
    assert json.loads(alert["triggered_rules"]) == ["AML-001"]
    # L3 置 high（FR-7）
    l3 = _one(env, "SELECT * FROM customer_profile_l3 WHERE customer_id = 'CUST-1002'")
    assert l3["monitor_tier"] == "high"
    # 紧急推送含 compliance
    pushed = [p for ch, p in fake.messages if ch == "risk:pub:alert"]
    aml_push = [p for p in pushed if p["alert_id"] == alert["alert_id"]]
    assert aml_push and "compliance" in aml_push[-1]["notify_role"]
    # compliance 账号台账可见该单（A-7 强制 aml 过滤的另一面）
    r = c.get("/api/risk/alerts", headers=COMPLIANCE)
    assert r.status_code == 200
    items = r.json()["items"]
    assert items and all(i["alert_type"] == "aml" for i in items)
    assert any(i["alert_id"] == alert["alert_id"] for i in items)
    # 账户未被冻结（R-03 禁止自动冻户）
    row = _core_one(env, "SELECT is_active FROM core_customer WHERE customer_id = 'CUST-1002'")
    assert row["is_active"] == 1
    _state["a5_alert_id"] = alert["alert_id"]


# ---------- A-7：人工处置状态机 + compliance 403 + GET 仅 aml ----------


def test_a7_handle_state_machine_compliance_forbidden(iclient, risk_demo_env):
    c, _ = iclient
    env = risk_demo_env
    alert_id = _state["a3_alert_id"]
    r = c.post(
        f"/api/risk/alerts/{alert_id}/handle",
        json={"handler_result": "confirmed_suspicious", "handler_comment": "确认可疑"},
        headers=OFFICER,
    )
    assert r.status_code == 200
    body = r.json()
    assert body["status"] == "confirmed_suspicious" and body["handler_id"] == "STAFF-90001"
    # 状态机：已处置单禁止跳改
    r2 = c.post(
        f"/api/risk/alerts/{alert_id}/handle",
        json={"handler_result": "confirmed_normal"},
        headers=OFFICER,
    )
    assert r2.status_code == 409
    # compliance 无处置权
    r3 = c.post(
        f"/api/risk/alerts/{alert_id}/handle",
        json={"handler_result": "confirmed_normal"},
        headers=COMPLIANCE,
    )
    assert r3.status_code == 403
    # 处置审计留痕（同事务，agent_type='risk'）
    audit = _one(
        env,
        "SELECT * FROM audit_log WHERE event_type = 'alert_handle' AND actor_id = 'STAFF-90001'"
        " AND decision = 'alert_handled' AND handler_result = 'confirmed_suspicious'",
    )
    assert audit is not None


# ---------- A-9：越权 403 + 审计 ----------


def test_a9_cross_customer_and_unassigned_advisor_403(iclient, risk_demo_env):
    c, _ = iclient
    env = risk_demo_env
    # customer 查他人
    r = c.post(
        "/api/risk/suitability/check",
        json={"customer_id": "CUST-3001", "product_id": "PROD-510300"},
        headers=CUSTOMER_1002,
    )
    assert r.status_code == 403 and r.json()["error_code"] == "AUTH_403_NOT_OWNER"
    # advisor 查非名下（STAFF-10086 名下无 CUST-3001）
    r = c.post(
        "/api/risk/suitability/check",
        json={"customer_id": "CUST-3001", "product_id": "PROD-510300"},
        headers=ADVISOR_10087,  # 名下无 CUST-3001
    )
    assert r.status_code == 403 and r.json()["error_code"] == "AUTH_403_NOT_ASSIGNED"
    denials = _one(
        env,
        "SELECT COUNT(*) AS n FROM audit_log WHERE event_type = 'authz' AND decision = 'forbidden'"
        " AND actor_id IN ('CUST-1002', 'STAFF-10087') AND created_at >= CURDATE()",
    )
    assert denials["n"] == 2


# ---------- 参数校验与无 trace 头兜底 ----------


def test_invalid_type_400_and_no_new_trade_audit(iclient, risk_demo_env):
    """未知类型 → 400 且不落 `trade_request` 审计（§12 **R15** 处置后的替身）。

    R15 原用例以 `convert` 触发（T-9 前是参数校验失败）。T-9 起 convert 是**合法**
    类型且端到端已由 `test_convert_integration.py` 覆盖，故本槽位改用仍然非法的
    `purchase` —— 保留的正是原用例真正保护的不变量：**校验失败的请求不落审计**。
    """
    c, _ = iclient
    env = risk_demo_env
    before = _one(env, "SELECT COUNT(*) AS n FROM audit_log WHERE event_type = 'trade_request'")
    r = c.post(
        "/api/simulate/trade",
        json=_trade("CUST-3001", "PROD-510300", "purchase", 1000),
        headers=DEMO,
    )
    assert r.status_code == 400 and r.json()["error_code"] == "BAD_REQUEST"
    after = _one(env, "SELECT COUNT(*) AS n FROM audit_log WHERE event_type = 'trade_request'")
    assert after["n"] == before["n"]  # 未知类型属参数校验失败，不落审计


def test_missing_trace_header_generates_one(iclient):
    c, _ = iclient
    r = c.get("/api/risk/alerts", headers=OFFICER)
    assert r.status_code == 200
    assert r.headers["X-Trace-Id"].startswith("trc-")


def test_settings_thresholds_loaded():
    """冒烟：阈值配置与冻结规则一致（.env 未覆盖时）。"""
    assert settings.risk_large_amount == 500000
    # risk_assessment_valid_days 已随 AL-05 退役（有效期由 core_customer_risk.expires_at 驱动）
    assert not hasattr(settings, "risk_assessment_valid_days")