"""CMA 跨实体隔离 — AI 建议「忽略」与「应用目标 KPI」账套收敛（2026-09-18 派生单）

任务：fullstack-20260918-2030-dismiss-suggestion-entity-scope
父单：fullstack-20260918-2025-read-side-entity-scope-gaps
      （其 §五 范围外发现 第 1/2 条：写侧同族漏网点）

缺陷（同文件 ai_suggestions.py 的写侧漏网点）：
  1. dismiss_suggestion      — POST /{suggestion_id}/dismiss 按 id 直取、无账套条件，
                               且会改状态（status="dismissed"）
     ⇒ 本账套会话带对端账套建议 id 可跨账套忽略对端建议（数据被改写）
  2. _apply_kpi_target       — 目标 KPIDefinition 只按 id 查，不校验归属会话账套
  3. _apply_budget_adjust    — 同上（BudgetPlan 侧已按 sug.entity_id，KPI 侧未校验）
     ⇒ 建议自身归属校验通过后，其 suggestion_data 指向对端账套 KPI 时，
       应用动作会改到对端账套的 target_value / 预算行（纵深防御缺口）

对端记录口径 = 404「建议不存在」/「KPI {id} 不存在」（对齐同文件
apply_suggestion 与 1905b/2015 的写法）。

本用例（改前失败条目见 _reports/evidence-fullstack-20260918-2030-red.txt）：
- T1 忽略建议：对端账套 → 404 且建议状态保持 unapplied（双向）；本账套 → 200
     且状态 dismissed（双向正对照）
- T2 忽略幂等：同一建议重复忽略仍 200、状态仍 dismissed（既有语义不得改动）
- T3 应用 kpi_target：目标 KPI 非本账套 → 404，对端 KPI target_value 逐值未变，
     建议状态保持 unapplied；本账套应用正常（正对照，目标值已写入）
- T4 应用 budget_adjust：目标 KPI 非本账套 → 404，不落任何预算行（对端/本账套都不落）
- T5 鉴权底线：dismiss 无 token → 401（改前改后都应通过）
"""
import pytest
from fastapi.testclient import TestClient
from sqlalchemy.orm import Session

from app.models import AISuggestion, BudgetPlan, Entity, KPIDefinition
from tests.conftest import TEST_USER_PASSWORD, auth_header, create_test_user

SUGG = "/api/cma/ai/suggestions"

# kpi_code 全局唯一 → 每账套独立 code
E1_KPI = "ZZ_DSE1_KPI"
E2_KPI = "ZZ_DSE2_KPI"
E1_SUG_TITLE = "ZZ_DS e1 私有建议"
E2_SUG_TITLE = "ZZ_DS e2 私有建议"
E1_CROSS_TITLE = "ZZ_DS e2 指向对端 KPI 的建议"


# ──────────────────────────────────────────────
# 夹具（沿用同族风格：双向登录 + 同账套正对照）
# ──────────────────────────────────────────────

def _ensure_entity(db: Session, eid: int, name: str) -> Entity:
    ent = db.query(Entity).filter(Entity.id == eid).first()
    if not ent:
        ent = Entity(id=eid, name=name, short_name=name, status="active")
        db.add(ent)
        db.commit()
        db.refresh(ent)
    return ent


def _mk_kpi(db: Session, code: str, eid: int, target: float = 1000.0) -> KPIDefinition:
    kpi = KPIDefinition(
        entity_id=eid,
        kpi_code=code,
        kpi_name=f"{code}-名称",
        dimension="finance",
        category="revenue_growth",
        formula="-",
        data_source_type="excel",
        data_source="Excel导入",
        data_owner="财务部",
        frequency="monthly",
        unit="元",
        target_value=target,
        kpi_level="operational",
        status="active",
    )
    db.add(kpi)
    db.commit()
    db.refresh(kpi)
    return kpi


def _seed_two_entities(db: Session):
    _ensure_entity(db, 1, "酣客")
    _ensure_entity(db, 2, "博海")
    create_test_user(db)


def _login(client: TestClient, entity_id: int) -> str:
    resp = client.post("/api/cma/auth/login", json={
        "username": "testadmin",
        "password": TEST_USER_PASSWORD,
        "entity_id": entity_id,
    })
    assert resp.status_code == 200, f"登录 entity{entity_id} 失败: {resp.text[:300]}"
    return resp.json()["token"]


def _mk_suggestion(client: TestClient, token: str, title: str,
                   target_id: int, kpi_id: int, target_value: float = 2000.0) -> int:
    body = {
        "suggestion_type": "kpi_target",
        "target_type": "kpi",
        "target_id": target_id,
        "title": title,
        "content": "目标偏低，建议上调",
        "suggestion_data": {"kpi_id": kpi_id, "target_value": target_value},
    }
    r = client.post(SUGG, json=body, headers=auth_header(token))
    assert r.status_code == 200, f"创建建议失败: {r.status_code} {r.text[:300]}"
    return r.json()["data"]["id"]


def _sug_status(db: Session, sid: int) -> str:
    db.expire_all()
    row = db.query(AISuggestion).filter(AISuggestion.id == sid).first()
    assert row is not None, f"建议 #{sid} 不存在"
    return row.status


def _kpi_target(db: Session, kid: int) -> float:
    db.expire_all()
    row = db.query(KPIDefinition).filter(KPIDefinition.id == kid).first()
    assert row is not None, f"KPI #{kid} 不存在"
    return row.target_value


# ──────────────────────────────────────────────
# T1. 忽略建议按会话账套限定（双向 + 正对照）
# ──────────────────────────────────────────────

def test_dismiss_suggestion_scoped_to_session_entity(client: TestClient, db: Session):
    """对端账套建议 → 404 且状态保持 unapplied；本账套 → 200 且 dismissed（双向）"""
    _seed_two_entities(db)
    k1 = _mk_kpi(db, E1_KPI, 1)
    k2 = _mk_kpi(db, E2_KPI, 2)
    tok1 = _login(client, 1)
    tok2 = _login(client, 2)
    s1 = _mk_suggestion(client, tok1, E1_SUG_TITLE, k1.id, k1.id)
    s2 = _mk_suggestion(client, tok2, E2_SUG_TITLE, k2.id, k2.id)

    # 方向 A：e2 会话忽略 e1 建议 → 404 且 e1 建议状态未改
    r_a = client.post(f"{SUGG}/{s1}/dismiss", headers=auth_header(tok2))
    assert r_a.status_code == 404, (
        f"e2 会话忽略 e1 建议应 404，实际 {r_a.status_code} {r_a.text[:200]}"
        " —— dismiss_suggestion 按 id 直取、未按会话账套限定"
    )
    assert _sug_status(db, s1) == "unapplied", (
        "跨账套忽略竟改动了对端账套建议状态（应为 unapplied）"
    )

    # 方向 B：e1 会话忽略 e2 建议 → 404 且 e2 建议状态未改
    r_b = client.post(f"{SUGG}/{s2}/dismiss", headers=auth_header(tok1))
    assert r_b.status_code == 404, (
        f"e1 会话忽略 e2 建议应 404，实际 {r_b.status_code} {r_b.text[:200]}"
    )
    assert _sug_status(db, s2) == "unapplied", (
        "跨账套忽略竟改动了对端账套建议状态（应为 unapplied）"
    )

    # 正对照：本账套忽略自己的建议 → 200 且状态 dismissed
    r_ok1 = client.post(f"{SUGG}/{s1}/dismiss", headers=auth_header(tok1))
    assert r_ok1.status_code == 200, f"e1 忽略自己的建议应 200，实际 {r_ok1.status_code}"
    assert _sug_status(db, s1) == "dismissed", "本账套忽略未落状态 dismissed"

    r_ok2 = client.post(f"{SUGG}/{s2}/dismiss", headers=auth_header(tok2))
    assert r_ok2.status_code == 200, f"e2 忽略自己的建议应 200，实际 {r_ok2.status_code}"
    assert _sug_status(db, s2) == "dismissed", "本账套忽略未落状态 dismissed"


# ──────────────────────────────────────────────
# T2. 忽略幂等：既有语义不得改动
# ──────────────────────────────────────────────

def test_dismiss_suggestion_repeat_keeps_existing_semantics(client: TestClient, db: Session):
    """已 dismissed 的建议重复忽略仍 200、状态仍 dismissed（加账套条件不得改动既有语义）"""
    _seed_two_entities(db)
    k1 = _mk_kpi(db, E1_KPI, 1)
    tok1 = _login(client, 1)
    s1 = _mk_suggestion(client, tok1, E1_SUG_TITLE, k1.id, k1.id)

    assert client.post(f"{SUGG}/{s1}/dismiss",
                       headers=auth_header(tok1)).status_code == 200
    r2 = client.post(f"{SUGG}/{s1}/dismiss", headers=auth_header(tok1))
    assert r2.status_code == 200, (
        f"重复忽略应维持既有 200 语义，实际 {r2.status_code} {r2.text[:200]}"
    )
    assert _sug_status(db, s1) == "dismissed", "重复忽略后状态异常"


# ──────────────────────────────────────────────
# T3. 应用 kpi_target：目标 KPI 归属校验
# ──────────────────────────────────────────────

def test_apply_kpi_target_foreign_kpi_404(client: TestClient, db: Session):
    """建议自身属本账套、但其目标 KPI 属对端 → 404；对端 KPI target_value 逐值未变"""
    _seed_two_entities(db)
    k1 = _mk_kpi(db, E1_KPI, 1, target=1000.0)
    _mk_kpi(db, E2_KPI, 2, target=3000.0)
    tok1 = _login(client, 1)
    tok2 = _login(client, 2)

    # e2 会话创建建议（归属 e2），但 suggestion_data/target_id 指向 e1 的 KPI
    # （模拟手填数据 / 迁移遗留 / Bot 通道写入的不自洽数据）
    s_cross = _mk_suggestion(client, tok2, E1_CROSS_TITLE, k1.id, k1.id, target_value=88888.0)

    before_k1 = _kpi_target(db, k1.id)
    assert before_k1 == 1000.0, f"前置：e1 KPI 目标值异常 {before_k1}"

    r = client.post(f"{SUGG}/{s_cross}/apply", headers=auth_header(tok2),
                    json={"action": "kpi_target", "target_value": 99999.0})
    assert r.status_code == 404, (
        f"目标 KPI 属对端账套应 404，实际 {r.status_code} {r.text[:200]}"
        " —— _apply_kpi_target 只按 id 查 KPIDefinition，未校验归属会话账套"
    )
    assert _kpi_target(db, k1.id) == before_k1, (
        f"对端账套 KPI target_value 被改写：{before_k1} → {_kpi_target(db, k1.id)}"
    )
    assert _sug_status(db, s_cross) == "unapplied", (
        "越权应用竟改动了建议状态（应保持 unapplied）"
    )

    # 正对照：本账套建议 + 本账套 KPI → 200 且目标值已写入
    k2 = db.query(KPIDefinition).filter(KPIDefinition.kpi_code == E2_KPI).first()
    s_ok = _mk_suggestion(client, tok2, E2_SUG_TITLE, k2.id, k2.id, target_value=4500.0)
    r_ok = client.post(f"{SUGG}/{s_ok}/apply", headers=auth_header(tok2),
                       json={"action": "kpi_target", "target_value": 4500.0})
    assert r_ok.status_code == 200, f"本账套应用应 200，实际 {r_ok.status_code} {r_ok.text[:200]}"
    assert _kpi_target(db, k2.id) == 4500.0, "本账套应用未写入目标值"


# ──────────────────────────────────────────────
# T4. 应用 budget_adjust：目标 KPI 归属校验
# ──────────────────────────────────────────────

def test_apply_budget_adjust_foreign_kpi_404(client: TestClient, db: Session):
    """budget_adjust 目标 KPI 属对端 → 404 且不落任何预算行（含对端账套）"""
    _seed_two_entities(db)
    k1 = _mk_kpi(db, E1_KPI, 1, target=1000.0)
    _mk_kpi(db, E2_KPI, 2, target=3000.0)
    tok2 = _login(client, 2)
    s_cross = _mk_suggestion(client, tok2, E1_CROSS_TITLE, k1.id, k1.id, target_value=7777.0)

    db.expire_all()
    plans_before = db.query(BudgetPlan).filter(BudgetPlan.kpi_id == k1.id).count()

    r = client.post(f"{SUGG}/{s_cross}/apply", headers=auth_header(tok2),
                    json={"action": "budget_adjust", "period": "2026-09", "budget_value": 7777.0})
    assert r.status_code == 404, (
        f"budget_adjust 目标 KPI 属对端账套应 404，实际 {r.status_code} {r.text[:200]}"
        " —— _apply_budget_adjust 的 KPI 查询未校验归属会话账套"
    )
    db.expire_all()
    plans_after = db.query(BudgetPlan).filter(BudgetPlan.kpi_id == k1.id).count()
    assert plans_after == plans_before, (
        f"越权 budget_adjust 落了预算行：{plans_before} → {plans_after}"
    )
    assert _sug_status(db, s_cross) == "unapplied", "越权应用竟改动了建议状态"


# ──────────────────────────────────────────────
# T5. 鉴权底线（dismiss / apply 无 token → 401）
# ──────────────────────────────────────────────

def test_dismiss_and_apply_without_token_401(client: TestClient, db: Session):
    """无 token 一律 401（改前改后都应通过）"""
    _seed_two_entities(db)
    k1 = _mk_kpi(db, E1_KPI, 1)
    tok1 = _login(client, 1)
    s1 = _mk_suggestion(client, tok1, E1_SUG_TITLE, k1.id, k1.id)

    r1 = client.post(f"{SUGG}/{s1}/dismiss")
    assert r1.status_code == 401, f"dismiss 无 token 应 401，实际 {r1.status_code}"

    r2 = client.post(f"{SUGG}/{s1}/apply", json={"action": "kpi_target", "target_value": 1})
    assert r2.status_code == 401, f"apply 无 token 应 401，实际 {r2.status_code}"