"""客户管理接口集成测试（需要 MySQL 与 Redis）。

守的是客户归属的一致性 —— 归属变更必须「主表更新 + 留痕新增」同事务
完成，拆开就会出现「主表已换人、留痕缺失」的静默不一致，事后追溯无据；
编辑端点若能触归属，就会出现「改了归属却无留痕」的旁路，破坏留痕的
append-only 完整性；「公司名称+负责人」组合唯一缺失会放行重复客户。

运行前置：``docker compose -f docker/docker-compose.dev.yml up -d``

数据卫生：公司名与归属人员姓名一律 ``t_`` 前缀，由 conftest 兜底清理。
"""

import uuid

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

from app.core.constants import (
    ACTION_CREATE,
    BUSINESS_ROLE_SALESPERSON,
    CUSTOMER_TYPE_ENTERPRISE,
    CUSTOMER_TYPE_PERSONAL,
    MODULE_CUSTOMER,
    PRODUCT_CATEGORY_MUNICIPAL_WATER,
)
from app.core.db import get_session_factory
from app.models import BusinessRole, OperationLog, OwnershipChangeLog
from app.models.customer import OWNER_TYPE_CUSTOMER

pytestmark = pytest.mark.integration

_PERSONNEL = "/api/v1/base/personnel"
_CUSTOMERS = "/api/v1/base/customers"
_BUSINESSES = "/api/v1/business/businesses"


def _company() -> str:
    return f"t_公司_{uuid.uuid4().hex[:8]}"


def _role_id() -> int:
    """种子岗位（营销员）：归属人员的合法岗位引用。"""
    factory = get_session_factory()
    with factory() as session:
        return int(
            session.execute(
                select(BusinessRole.id).where(
                    BusinessRole.role_code == BUSINESS_ROLE_SALESPERSON,
                    BusinessRole.status == 1,
                )
            ).scalar_one()
        )


def _personnel(client: TestClient, headers: dict) -> dict:
    """建一名 t_ 前缀的在职营销人员（归属变更的被引用方）。"""
    resp = client.post(
        _PERSONNEL,
        json={
            "personnel_name": f"t_人员_{uuid.uuid4().hex[:8]}",
            "business_role_id": _role_id(),
        },
        headers=headers,
    )
    assert resp.status_code == 200, resp.text
    return resp.json()["data"]


def _cpayload(company: str, **overrides: object) -> dict:
    body: dict = {
        "company_name": company,
        "owner_name": "张老板",
        "customer_type": CUSTOMER_TYPE_PERSONAL,
        "address": "本溪市平山区",
    }
    body.update(overrides)
    return body


def _create_customer(client: TestClient, headers: dict, **overrides: object) -> dict:
    resp = client.post(_CUSTOMERS, json=_cpayload(_company(), **overrides), headers=headers)
    assert resp.status_code == 200, resp.text
    return resp.json()["data"]


def _logs_of(username: str) -> list[OperationLog]:
    factory = get_session_factory()
    with factory() as session:
        return list(
            session.execute(
                select(OperationLog)
                .where(OperationLog.username == username)
                .order_by(OperationLog.id.desc())
            ).scalars()
        )


def _latest_log(customer_id: int) -> OwnershipChangeLog | None:
    """取该客户最新一条归属留痕（按 id 倒序）。"""
    factory = get_session_factory()
    with factory() as session:
        return (
            session.execute(
                select(OwnershipChangeLog)
                .where(OwnershipChangeLog.customer_id == customer_id)
                .order_by(OwnershipChangeLog.id.desc())
            )
            .scalars()
            .first()
        )


class TestAuth:
    """鉴权：登录后接口，裸访问一律 401。"""

    def test_未登录访问客户列表_401(self, client: TestClient) -> None:
        resp = client.get(_CUSTOMERS)
        assert resp.status_code == 401, resp.text


class TestCrudFlow:
    """正向链路与组合唯一 ——「公司名称+负责人」是业务唯一标识。"""

    def test_新增客户带初始归属_回显归属人员姓名(self, client: TestClient, normal: dict) -> None:
        owner = _personnel(client, normal["headers"])
        data = _create_customer(client, normal["headers"], owner_personnel_id=owner["id"])
        assert data["owner_personnel_id"] == owner["id"]
        assert data["owner_personnel_name"] == owner["personnel_name"]
        assert data["customer_type"] == CUSTOMER_TYPE_PERSONAL

    def test_同公司名不同负责人创建成功(self, client: TestClient, normal: dict) -> None:
        company = _company()
        first = _create_customer(client, normal["headers"], company_name=company)
        second = client.post(
            _CUSTOMERS,
            json=_cpayload(company, owner_name="李老板"),
            headers=normal["headers"],
        )
        assert second.status_code == 200, second.text
        assert second.json()["data"]["id"] != first["id"]

    def test_重名同负责人_400(self, client: TestClient, normal: dict) -> None:
        company = _company()
        _create_customer(client, normal["headers"], company_name=company)
        dup = client.post(
            _CUSTOMERS,
            json=_cpayload(company, owner_name="张老板"),
            headers=normal["headers"],
        )
        assert dup.status_code == 400, dup.text
        assert "该公司名称与负责人的客户已存在" in dup.json()["message"]

    def test_删除被业务引用的客户_400引导处理单据(self, client: TestClient, normal: dict) -> None:
        """业务表就位后删除保护补齐：FK RESTRICT 不能以 500 暴露。"""
        headers = normal["headers"]
        customer = _create_customer(client, headers)
        resp = client.post(
            _BUSINESSES,
            json={
                "customer_id": customer["id"],
                "items": [
                    {
                        "product_name": "t_被引用产品",
                        "product_category": PRODUCT_CATEGORY_MUNICIPAL_WATER,
                        "quantity": "1",
                        "sale_price": "1",
                    }
                ],
            },
            headers=headers,
        )
        assert resp.status_code == 200, resp.text
        blocked = client.delete(f"{_CUSTOMERS}/{customer['id']}", headers=headers)
        assert blocked.status_code == 400, blocked.text
        assert "已存在关联业务" in blocked.json()["message"]

    def test_客户分类非法_400(self, client: TestClient, normal: dict) -> None:
        resp = client.post(
            _CUSTOMERS,
            json=_cpayload(_company(), customer_type="not_a_type"),
            headers=normal["headers"],
        )
        assert resp.status_code == 400, resp.text
        assert "客户分类不合法" in resp.json()["message"]

    def test_编辑其他字段不触归属_塞归属字段也被忽略(
        self, client: TestClient, normal: dict
    ) -> None:
        """归属只有 /ownership 一条写路径 —— 编辑端点防「改归属不留痕」旁路。"""
        headers = normal["headers"]
        owner = _personnel(client, headers)
        stranger = _personnel(client, headers)
        customer = _create_customer(client, headers, owner_personnel_id=owner["id"])

        updated = client.put(
            f"{_CUSTOMERS}/{customer['id']}",
            json={
                "company_name": customer["company_name"],
                "owner_name": customer["owner_name"],
                "customer_type": CUSTOMER_TYPE_ENTERPRISE,
                "address": "沈阳市沈河区",
                # 试图经编辑端点改归属：schema 未声明该字段，必须被忽略
                "ownerPersonnelId": stranger["id"],
            },
            headers=headers,
        )
        assert updated.status_code == 200, updated.text
        body = updated.json()["data"]
        assert body["customer_type"] == CUSTOMER_TYPE_ENTERPRISE
        assert body["address"] == "沈阳市沈河区"
        assert body["owner_personnel_id"] == owner["id"], "编辑端点不得改动归属"
        assert body["owner_personnel_name"] == owner["personnel_name"]

        detail = client.get(f"{_CUSTOMERS}/{customer['id']}", headers=headers)
        assert detail.json()["data"]["owner_personnel_id"] == owner["id"]
        assert _latest_log(int(customer["id"])) is None, "编辑不应产生归属留痕"


class TestOwnership:
    """归属变更：主表更新与留痕同事务；校验失败不留脏数据。"""

    def test_归属变更_主表更新且留痕新增(self, client: TestClient, normal: dict) -> None:
        headers = normal["headers"]
        old = _personnel(client, headers)
        new = _personnel(client, headers)
        customer = _create_customer(client, headers, owner_personnel_id=old["id"])

        resp = client.put(
            f"{_CUSTOMERS}/{customer['id']}/ownership",
            json={"new_owner_personnel_id": new["id"], "reason": "区域调整"},
            headers=headers,
        )
        assert resp.status_code == 200, resp.text
        body = resp.json()["data"]
        assert body["owner_personnel_id"] == new["id"]
        assert body["owner_personnel_name"] == new["personnel_name"]

        log = _latest_log(int(customer["id"]))
        assert log is not None, "归属变更未写留痕"
        assert log.owner_type == OWNER_TYPE_CUSTOMER
        assert log.customer_id == int(customer["id"])
        assert log.old_owner_personnel_id == int(old["id"])
        assert log.new_owner_personnel_id == int(new["id"])
        assert log.change_reason == "区域调整"
        assert log.operator_name == normal["username"]

    def test_变更后归属人员已离职_400(self, client: TestClient, normal: dict) -> None:
        headers = normal["headers"]
        target = _personnel(client, headers)
        client.put(f"{_PERSONNEL}/{target['id']}/status", json={"status": 0}, headers=headers)
        customer = _create_customer(client, headers)
        resp = client.put(
            f"{_CUSTOMERS}/{customer['id']}/ownership",
            json={"new_owner_personnel_id": target["id"]},
            headers=headers,
        )
        assert resp.status_code == 400, resp.text
        assert "归属人员不存在或已离职" in resp.json()["message"]
        assert _latest_log(int(customer["id"])) is None, "失败变更不应留痕"

    def test_新旧归属相同_400(self, client: TestClient, normal: dict) -> None:
        headers = normal["headers"]
        owner = _personnel(client, headers)
        customer = _create_customer(client, headers, owner_personnel_id=owner["id"])
        resp = client.put(
            f"{_CUSTOMERS}/{customer['id']}/ownership",
            json={"new_owner_personnel_id": owner["id"]},
            headers=headers,
        )
        assert resp.status_code == 400, resp.text
        assert "归属未变化" in resp.json()["message"]

    def test_双方均为空_400(self, client: TestClient, normal: dict) -> None:
        """无归属客户再清一次归属也属「未变化」——不产生空转留痕。"""
        customer = _create_customer(client, normal["headers"])
        resp = client.put(
            f"{_CUSTOMERS}/{customer['id']}/ownership",
            json={"new_owner_personnel_id": None},
            headers=normal["headers"],
        )
        assert resp.status_code == 400, resp.text
        assert "归属未变化" in resp.json()["message"]

    def test_变更为空即清空归属_主表与留痕一致(self, client: TestClient, normal: dict) -> None:
        headers = normal["headers"]
        owner = _personnel(client, headers)
        customer = _create_customer(client, headers, owner_personnel_id=owner["id"])
        resp = client.put(
            f"{_CUSTOMERS}/{customer['id']}/ownership",
            json={"new_owner_personnel_id": None, "reason": "暂无负责人"},
            headers=headers,
        )
        assert resp.status_code == 200, resp.text
        body = resp.json()["data"]
        assert body["owner_personnel_id"] is None
        assert body["owner_personnel_name"] is None

        log = _latest_log(int(customer["id"]))
        assert log is not None
        assert log.old_owner_personnel_id == int(owner["id"])
        assert log.new_owner_personnel_id is None
        assert log.change_reason == "暂无负责人"


class TestOwnershipLogs:
    """留痕分页：新旧归属人姓名由联表带出，倒序可追溯变更轨迹。"""

    def test_留痕分页带新旧归属人姓名并倒序(self, client: TestClient, normal: dict) -> None:
        headers = normal["headers"]
        first = _personnel(client, headers)
        second = _personnel(client, headers)
        customer = _create_customer(client, headers, owner_personnel_id=first["id"])

        r1 = client.put(
            f"{_CUSTOMERS}/{customer['id']}/ownership",
            json={"new_owner_personnel_id": second["id"], "reason": "第一次调整"},
            headers=headers,
        )
        assert r1.status_code == 200, r1.text
        r2 = client.put(
            f"{_CUSTOMERS}/{customer['id']}/ownership",
            json={"new_owner_personnel_id": None, "reason": "清空归属"},
            headers=headers,
        )
        assert r2.status_code == 200, r2.text

        resp = client.get(f"{_CUSTOMERS}/{customer['id']}/ownership-logs", headers=headers)
        assert resp.status_code == 200, resp.text
        body = resp.json()["data"]
        assert body["total"] == 2
        latest, earlier = body["list"][0], body["list"][1]
        assert latest["change_reason"] == "清空归属"
        assert latest["old_owner_personnel_id"] == int(second["id"])
        assert latest["old_owner_name"] == second["personnel_name"]
        assert latest["new_owner_personnel_id"] is None
        assert latest["new_owner_name"] is None
        assert earlier["old_owner_name"] == first["personnel_name"]
        assert earlier["new_owner_name"] == second["personnel_name"]
        assert earlier["new_owner_personnel_id"] == int(second["id"])


class TestAudit:
    """写操作（含归属变更）留痕，摘要要能定位到客户。"""

    def test_新增客户留审计(self, client: TestClient, normal: dict) -> None:
        data = _create_customer(client, normal["headers"])
        logs = [
            log
            for log in _logs_of(normal["username"])
            if log.module == MODULE_CUSTOMER and log.action == ACTION_CREATE
        ]
        assert logs, "新增客户未留操作日志"
        latest = logs[0]
        assert latest.success == 1
        assert data["company_name"] in latest.summary

    def test_归属变更审计摘要含客户名(self, client: TestClient, normal: dict) -> None:
        headers = normal["headers"]
        old = _personnel(client, headers)
        new = _personnel(client, headers)
        customer = _create_customer(client, headers, owner_personnel_id=old["id"])
        resp = client.put(
            f"{_CUSTOMERS}/{customer['id']}/ownership",
            json={"new_owner_personnel_id": new["id"], "reason": "区域调整"},
            headers=headers,
        )
        assert resp.status_code == 200, resp.text

        logs = [
            log
            for log in _logs_of(normal["username"])
            if log.module == MODULE_CUSTOMER and log.success == 1
        ]
        assert logs, "归属变更未留操作日志"
        latest = logs[0]
        assert customer["company_name"] in latest.summary, "摘要应含客户名"
        assert "→" in latest.summary, "摘要应体现新旧归属走向"