"""T-7 真 MySQL 验证脚本：`convert_service.convert_fund` 八步编排实跑 + DoD 断言。

**为什么 sqlite 单测全绿还不够（T-7 视角）**

sqlite 单测验证了八步顺序与折算值，但**证明不了**以下只有真 MySQL（InnoDB）才成立、
且正是本次实施期修正点的事项：

1. **`complete_convert` 三步法 upsert（R-a）在真库成立**：无 `client_request_id` 时
   不走占位、`complete_convert` 必须**先查再 INSERT** 完成行。sqlite 单测因 happy path
   不带键、从未触达「无占位即 INSERT」分支，看不出 MySQL 下是否真的能落行。
   本次修复前该分支缺失 → `risk_convert_detail` 0 行（已被单测暴露）。
2. **`uk_idem` 唯一约束真实存在并生效**：幂等「同键只出一组流水」除了代码判定，
   还依赖 `risk_convert_detail.client_request_id` 的 UNIQUE——真库迁移是否真的建了这条
   约束、重复插入是否真报 IntegrityError，sqlite 单测无法证明。
3. **`idx_convert_group` 真实存在**：④ 重试判定 `has_convert_trades` 依赖它；
   约束缺失会让重试扫描全表或判错。
4. **DECIMAL(18,2/18,4) 精度**：`risk_convert_detail.fee_amount` / `nav` 在 MySQL 下
   落库零漂移（sqlite 用 REAL 无此保证）。
5. **阶段二失败兜底不回滚 Core**：本脚本覆盖 happy path 与幂等，4xx 不落库亦验证。

用法：
    python scripts/dev/verify_convert_service.py        # 建隔离数据 → 跑断言 → 清理

约定（与 T-6 `verify_convert_apply.py` 一致）：
- 用 **T7M 前缀**的隔离数据（客户/产品/批次/group_id），跑完**两个库**（core + agent）全清，
  不碰既有种子；
- 建/清数据走 `role="admin"`（需 DELETE）；事务本身走 `convert_fund` 默认的 ro/rw 账号；
- 固定 `trace_id = "T7M-VERIFY-TRACE"`，便于精准清理 `audit_log`（agent 库）。
"""

from __future__ import annotations

import sys
import threading
import uuid
from datetime import date, datetime, timedelta
from decimal import ROUND_HALF_UP, Decimal
from pathlib import Path

from sqlalchemy import text

ROOT = Path(__file__).resolve().parents[2]
sys.path.insert(0, str(ROOT))

from app.config.settings import settings  # noqa: E402
from app.repository.convert_repository import ConvertRepository  # noqa: E402
from app.service.convert.calc import (  # noqa: E402
    convert_amount,
    diff_fee,
    hold_days,
    in_qty,
    lot_amount,
    lot_fee,
    plan_lots,
)
from app.service.convert.convert_service import convert_fund, PROCESSING  # noqa: E402
from app.service.convert.errors import InsufficientShares  # noqa: E402
from app.service.convert.fee import pick_fee_rate  # noqa: E402
from app.service.convert.types import FeeRule, Lot  # noqa: E402
from app.utils.db import dispose_engines, get_engine  # noqa: E402
from app.utils.trace import new_trace  # noqa: E402

CUSTOMER = "CUST-T7M"
PROD_OUT = "PROD-T7MO"
PROD_IN = "PROD-T7MI"
COMPANY = "华夏模拟基金"
TA = "TA-CN-001"
TRADE_AT = datetime(2026, 9, 4, 10, 0, 0)
TRADE_DATE = date(2026, 9, 4)
NOW = TRADE_AT
OUT_RATE = Decimal("0.0030")
IN_RATE = Decimal("0.0080")
IN_NAV = Decimal("0.9500")
FEE_TIERS = [
    (0, 7, "0.0150"), (7, 30, "0.0100"), (30, 180, "0.0050"),
    (180, 365, "0.0025"), (365, None, "0.0000"),
]
TRACE = "T7M-VERIFY-TRACE"
TRACE_E = "T7M-VERIFY-E"  # 隔离 E 组审计，便于按 trace 精确计数

_passed = 0
_failed = 0


def check(name: str, actual, expected) -> None:
    global _passed, _failed
    ok = actual == expected
    if ok:
        _passed += 1
    else:
        _failed += 1
    flag = "✅" if ok else "❌"
    print(f"  {flag} {name}: 实际 {actual!r}" + ("" if ok else f" / 期望 {expected!r}"))


def dec(value, places: str = "0.01") -> Decimal:
    return Decimal(str(value)).quantize(Decimal(places), rounding=ROUND_HALF_UP)


def q1(engine, sql: str, **params):
    with engine.connect() as conn:
        return conn.execute(text(sql), params).scalar()


def rows(engine, sql: str, **params):
    with engine.connect() as conn:
        return [dict(r) for r in conn.execute(text(sql), params).mappings()]


# ── 数据准备 / 清理（两个库） ────────────────────────────────────────
def seed_core(engine) -> None:
    with engine.begin() as conn:
        conn.execute(
            text(
                "INSERT INTO core_customer (customer_id, display_name, open_date) "
                "VALUES (:c, 'T7真库验证', :d)"
            ),
            {"c": CUSTOMER, "d": TRADE_DATE},
        )
        conn.execute(
            text(
                "INSERT INTO core_customer_risk (customer_id, risk_code, evaluated_at, expires_at) "
                "VALUES (:c, 'C3', :t, :exp)"
            ),
            {"c": CUSTOMER, "t": TRADE_AT - timedelta(days=30),
             "exp": TRADE_AT + timedelta(days=300)},
        )
        for pid, name, ptype, rate in [
            (PROD_OUT, "T7转出基金", "bond", OUT_RATE),
            (PROD_IN, "T7转入基金", "stock", IN_RATE),
        ]:
            conn.execute(
                text(
                    "INSERT INTO core_product (product_id, product_name, min_risk_code, "
                    "product_type, can_subscribe, can_redeem, subscribe_fee_rate, "
                    "fund_company, ta_code) "
                    "VALUES (:p, :n, 'R2', :t, 1, 1, :r, :co, :ta)"
                ),
                {"p": pid, "n": name, "t": ptype, "r": str(rate), "co": COMPANY, "ta": TA},
            )
        for mh, mh_max, rate in FEE_TIERS:
            conn.execute(
                text(
                    "INSERT INTO core_fee_rule (product_id, fee_type, min_hold_days, "
                    "max_hold_days, rate) VALUES (:p, 'redeem', :mh, :mh_max, :rate)"
                ),
                {"p": PROD_OUT, "mh": mh, "mh_max": mh_max, "rate": rate},
            )
        conn.execute(
            text(
                "INSERT INTO core_product_nav (product_id, nav, daily_chg_pct, nav_date) "
                "VALUES (:p, :nav, 0, :d)"
            ),
            {"p": PROD_IN, "nav": str(IN_NAV), "d": TRADE_DATE},
        )
        for lot_id, qty, nav, confirmed in [
            ("LOT-T7M-A1", "100", "1.0300", datetime(2026, 8, 1, 10, 0, 0)),
            ("LOT-T7M-A2", "50", "1.0000", datetime(2026, 9, 1, 10, 0, 0)),
        ]:
            conn.execute(
                text(
                    "INSERT INTO core_share_lot (lot_id, customer_id, product_id, qty, "
                    "remain_qty, nav, confirmed_at) VALUES (:l, :c, :p, :q, :q, :nav, :cat)"
                ),
                {"l": lot_id, "c": CUSTOMER, "p": PROD_OUT, "q": qty, "nav": nav, "cat": confirmed},
            )
        conn.execute(
            text(
                "INSERT INTO core_holding (customer_id, product_id, qty, cost_amount, "
                "market_value, pnl_pct, as_of) VALUES (:c, :p, 150, 150.00, 154.50, 0, :d)"
            ),
            {"c": CUSTOMER, "p": PROD_OUT, "d": TRADE_DATE},
        )


def seed_nav_stale(engine) -> None:
    """把转入端净值改成过期（距交易日 10 天 > 阈值 3）以触发 nav_stale 副审计。"""
    with engine.begin() as conn:
        conn.execute(
            text("UPDATE core_product_nav SET nav_date = :d WHERE product_id = :p"),
            {"d": date(2026, 8, 25), "p": PROD_IN},
        )


def cleanup_core(engine) -> None:
    with engine.begin() as conn:
        for sql, params in [
            ("DELETE FROM core_convert_lot_detail WHERE convert_group_id LIKE 'CNV-T7M%'", {}),
            ("DELETE FROM core_trade WHERE customer_id = :c", {"c": CUSTOMER}),
            ("DELETE FROM core_share_lot WHERE customer_id = :c", {"c": CUSTOMER}),
            ("DELETE FROM core_holding WHERE customer_id = :c", {"c": CUSTOMER}),
            ("DELETE FROM core_customer_risk WHERE customer_id = :c", {"c": CUSTOMER}),
            ("DELETE FROM core_fee_rule WHERE product_id LIKE 'PROD-T7M%'", {}),
            ("DELETE FROM core_product_nav WHERE product_id LIKE 'PROD-T7M%'", {}),
            ("DELETE FROM core_product WHERE product_id LIKE 'PROD-T7M%'", {}),
            ("DELETE FROM core_customer WHERE customer_id = :c", {"c": CUSTOMER}),
        ]:
            conn.execute(text(sql), params)


def cleanup_agent(engine) -> None:
    with engine.begin() as conn:
        conn.execute(
            text("DELETE FROM risk_convert_detail WHERE convert_group_id LIKE 'CNV-T7M%'")
        )
        conn.execute(
            text("DELETE FROM audit_log WHERE trace_id IN (:t1, :t2)"),
            {"t1": TRACE, "t2": TRACE_E},
        )


# ── 期望折算（全部走生产纯函数，与 service 内部同口径） ─────────────────
def compute_expected(engine, requested: str) -> dict:
    with engine.connect() as conn:
        lot_rows = [
            Lot.from_row(r)
            for r in conn.execute(
                text(
                    "SELECT * FROM core_share_lot WHERE customer_id = :c AND product_id = :p "
                    "ORDER BY confirmed_at ASC, lot_id ASC"
                ),
                {"c": CUSTOMER, "p": PROD_OUT},
            ).mappings()
        ]
        rules = [
            FeeRule.from_row(r)
            for r in conn.execute(
                text(
                    "SELECT * FROM core_fee_rule WHERE product_id = :p AND fee_type = 'redeem' "
                    "ORDER BY min_hold_days ASC"
                ),
                {"p": PROD_OUT},
            ).mappings()
        ]
    plan = plan_lots(lot_rows, Decimal(requested))
    out_amount = Decimal("0")
    redeem_fee = Decimal("0")
    for alloc in plan.allocations:
        amount = lot_amount(alloc.qty, alloc.nav)
        rate = pick_fee_rate(rules, hold_days(TRADE_DATE, alloc.confirmed_at), product_id=PROD_OUT)
        out_amount += amount
        redeem_fee += lot_fee(amount, rate)
    conv = convert_amount(out_amount, redeem_fee)
    in_amount = conv - diff_fee(conv, OUT_RATE, IN_RATE, "amount_diff")
    return {
        "out_amount": out_amount,
        "redeem_fee": redeem_fee,
        "convert_amount": conv,
        "in_amount": in_amount,
        "in_qty": in_qty(in_amount, IN_NAV),
        "actual_qty": plan.actual_qty,
    }


def _req(customer: str = CUSTOMER, qty: str = "120", cid_req: str | None = None) -> dict:
    return {
        "customer_id": customer,
        "from_product_id": PROD_OUT,
        "to_product_id": PROD_IN,
        "qty": qty,
        "client_request_id": cid_req,
    }


def _t7m_id(prefix: str, now: datetime) -> str:
    """注入 `convert_fund` 的 id_factory：让 group_id 带 T7M 前缀，
    与 `cleanup_agent` 的 `LIKE 'CNV-T7M%'` 对齐，跑完可精准清理（避免遗留行
    撞 `uk_group` 唯一约束）。默认 `_new_id` 生成 `CNV-<日期>-<uuid>`，不含 T7M。"""
    return f"CNV-T7M-{uuid.uuid4().hex[:8].upper()}"


def main() -> int:
    new_trace(TRACE)  # 固定 trace，便于清理 audit_log
    core_admin = get_engine(settings.mysql_core_database, "admin")
    agent_admin = get_engine(settings.mysql_database, "admin")

    run_ts = TRADE_AT.strftime("%H%M%S")  # 同一次运行内 cid_req 唯一，避免跨运行锁冲突
    try:
        # 初清 + 建隔离数据
        cleanup_core(core_admin)
        cleanup_agent(agent_admin)
        seed_core(core_admin)

        # ── A. 八步贯通（带幂等键）：占位 pending → 2 流水 → completed + 审计 ──
        print("\n【A】八步贯通（cid_req 带键）：2 流水 + risk_convert_detail 完成 + 审计")
        cid_a = f"T7M-REQ-A-{run_ts}"
        # 期望折算必须在转换前算（转换会扣减份额，转换后读库会得到不足份额）
        exp = compute_expected(core_admin, "120")
        first = convert_fund(_req(cid_req=cid_a), now=NOW, actor_id="verify-t7m", id_factory=_t7m_id)

        check("未拦截", first.get("blocked"), False)
        check("estimated=True", first.get("estimated"), True)
        check("group_id 前缀", first["convert_group_id"].startswith("CNV-"), True)
        check("流水条数", q1(core_admin, "SELECT COUNT(*) FROM core_trade WHERE convert_group_id = :g", g=first["convert_group_id"]), 2)
        check("R-b trade_type", sorted(r["trade_type"] for r in rows(core_admin, "SELECT trade_type FROM core_trade WHERE convert_group_id = :g", g=first["convert_group_id"])), ["redeem", "subscribe"])
        check("risk_convert_detail 条数", q1(agent_admin, "SELECT COUNT(*) FROM risk_convert_detail WHERE convert_group_id = :g", g=first["convert_group_id"]), 1)
        check("risk_convert_detail 状态", q1(agent_admin, "SELECT status FROM risk_convert_detail WHERE convert_group_id = :g", g=first["convert_group_id"]), "completed")
        # DECIMAL 精度：真库落库零漂移
        detail = rows(agent_admin, "SELECT fee_amount, nav FROM risk_convert_detail WHERE convert_group_id = :g", g=first["convert_group_id"])[0]
        check("fee_amount 精度(2位)", dec(detail["fee_amount"]), dec(exp["redeem_fee"]))
        check("nav 精度(4位)", dec(detail["nav"], "0.0001"), dec(exp["in_amount"] / exp["in_qty"], "0.0001"))
        # 审计：主审计 1 条；净值新鲜 → 无 nav_stale 副审计
        check("convert_accepted 审计", q1(agent_admin, "SELECT COUNT(*) FROM audit_log WHERE trace_id = :t AND decision = 'convert_accepted'", t=TRACE), 1)
        check("无 nav_stale 审计", q1(agent_admin, "SELECT COUNT(*) FROM audit_log WHERE trace_id = :t AND decision = 'nav_stale'", t=TRACE), 0)
        # 引擎未落地 → 不阻断、无 engine_error 审计
        check("engine_error=False", first.get("engine_error"), False)
        check("无 engine_error 审计", q1(agent_admin, "SELECT COUNT(*) FROM audit_log WHERE trace_id = :t AND decision = 'engine_error'", t=TRACE), 0)
        # 折算值对齐生产 calc
        check("out_amount", dec(first["out_amount"]), dec(exp["out_amount"]))
        check("redeem_fee", dec(first["redeem_fee"]), dec(exp["redeem_fee"]))
        check("convert_amount", dec(first["convert_amount"]), dec(exp["convert_amount"]))
        check("in_amount", dec(first["in_amount"]), dec(exp["in_amount"]))
        check("in_qty", dec(first["in_qty"]), dec(exp["in_qty"]))
        check("actual_qty", dec(first["actual_qty"]), dec(exp["actual_qty"]))

        # ── B. 幂等：同键重复 → 返回首次结果、只一组流水 ────────────────
        print("\n【B】幂等同键重试：返回首次结果、不产生第二组流水")
        again = convert_fund(_req(cid_req=cid_a), now=NOW, actor_id="verify-t7m", id_factory=_t7m_id)
        check("group_id 一致", again["convert_group_id"], first["convert_group_id"])
        check("in_qty 一致", dec(again["in_qty"]), dec(first["in_qty"]))
        check("out_trade_id 一致", again["out_trade_id"], first["out_trade_id"])
        check("core_trade 仅 2 条（无第二组）", q1(core_admin, "SELECT COUNT(*) FROM core_trade WHERE convert_group_id = :g", g=first["convert_group_id"]), 2)
        check("risk_convert_detail 仅 1 行", q1(agent_admin, "SELECT COUNT(*) FROM risk_convert_detail WHERE convert_group_id = :g", g=first["convert_group_id"]), 1)

        # ── C. 无幂等键：complete_convert 三步法 upsert 必须 INSERT 完成行 ──
        print("\n【C】无 cid_req：complete_convert upsert 直接 INSERT 完成行（修复点）")
        resp_c = convert_fund(_req(qty="30"), now=NOW, actor_id="verify-t7m", id_factory=_t7m_id)
        check("未拦截", resp_c.get("blocked"), False)
        check("risk_convert_detail 落 1 完成行", q1(agent_admin, "SELECT COUNT(*) FROM risk_convert_detail WHERE convert_group_id = :g AND status = 'completed'", g=resp_c["convert_group_id"]), 1)
        check("core_trade 2 条", q1(core_admin, "SELECT COUNT(*) FROM core_trade WHERE convert_group_id = :g", g=resp_c["convert_group_id"]), 2)

        # ── D. 4xx（份额不足）：不占位、不落流水、不审计 ─────────────────
        print("\n【D】4xx 分支（InsufficientShares）：零残留")
        before_detail = q1(agent_admin, "SELECT COUNT(*) FROM risk_convert_detail WHERE convert_group_id LIKE 'CNV-T7M%'")
        raised = None
        try:
            convert_fund(_req(qty="500"), now=NOW, actor_id="verify-t7m", id_factory=_t7m_id)
        except InsufficientShares:
            raised = "InsufficientShares"
        check("抛 InsufficientShares", raised, "InsufficientShares")
        check("无新增占位", q1(agent_admin, "SELECT COUNT(*) FROM risk_convert_detail WHERE convert_group_id LIKE 'CNV-T7M%'"), before_detail)

        # ── E. nav_stale 副审计（真库，净值过期） ───────────────────────
        print("\n【E】nav_stale 副审计：净值过期额外落 1 条审计")
        cleanup_core(core_admin)
        seed_core(core_admin)
        seed_nav_stale(core_admin)
        cid_e = f"T7M-REQ-E-{run_ts}"
        new_trace(TRACE_E)  # 切独立 trace，按 trace 精确计数 E 组审计
        resp_e = convert_fund(_req(cid_req=cid_e, qty="120"), now=NOW, actor_id="verify-t7m", id_factory=_t7m_id)
        check("nav_stale=True", resp_e.get("nav_stale"), True)
        check("nav_stale 审计 1 条", q1(agent_admin, "SELECT COUNT(*) FROM audit_log WHERE trace_id = :t AND decision = 'nav_stale'", t=TRACE_E), 1)
        check("convert_accepted 审计 1 条", q1(agent_admin, "SELECT COUNT(*) FROM audit_log WHERE trace_id = :t AND decision = 'convert_accepted'", t=TRACE_E), 1)

        # ── F. 重试判定依赖的索引真实存在 ──────────────────────────────
        print("\n【F】约束真实存在（重试判定 / 幂等兜底依赖）")
        check(
            "core_trade.idx_convert_group 存在",
            q1(core_admin, "SELECT COUNT(*) FROM information_schema.statistics "
                "WHERE table_schema = :db AND table_name = 'core_trade' "
                "AND index_name = 'idx_convert_group'", db=settings.mysql_core_database),
            1,
        )
        check(
            "risk_convert_detail.uk_idem 存在",
            q1(agent_admin, "SELECT COUNT(*) FROM information_schema.statistics "
                "WHERE table_schema = :db AND table_name = 'risk_convert_detail' "
                "AND index_name = 'uk_idem'", db=settings.mysql_database),
            1,
        )

        # ── G. uk_idem 真库生效：重复 client_request_id 必须 IntegrityError ──
        print("\n【G】uk_idem 真库生效：重复键报 IntegrityError")
        with agent_admin.begin() as conn:
            conn.execute(
                text("INSERT INTO risk_convert_detail (convert_group_id, client_request_id, status, estimated) "
                     "VALUES ('CNV-T7M-DUP', 'T7M-DUP-KEY', 'pending', 0)"),
            )
        dup_err = None
        try:
            with agent_admin.begin() as conn:
                conn.execute(
                    text("INSERT INTO risk_convert_detail (convert_group_id, client_request_id, status, estimated) "
                         "VALUES ('CNV-T7M-DUP2', 'T7M-DUP-KEY', 'pending', 0)"),
                )
        except Exception as exc:  # noqa: BLE001
            dup_err = type(exc).__name__
        check("重复键报 IntegrityError", "IntegrityError" in (dup_err or ""), True)
        with agent_admin.begin() as conn:
            conn.execute(text("DELETE FROM risk_convert_detail WHERE client_request_id = 'T7M-DUP-KEY'"))
    finally:
        cleanup_core(core_admin)
        cleanup_agent(agent_admin)
        dispose_engines()

    print(f"\n{'=' * 60}")
    print(f"真库验证（T-7 convert_service）：{_passed} 项一致 / {_failed} 项不一致")
    return 1 if _failed else 0


if __name__ == "__main__":
    sys.exit(main())