"""月度结算集成测试（M3 ④：生成快照 → 审批 → 锁定）。

守的还有：
- 确认回款口径（#8 策略点）：仅 is_active=1 且未入结的台账行入结；
  入结后重生成同月不再重复计入
- 通过即锁定（status=3 终态）；锁定后回款写路径 400（走调整单）
- 驳回回草稿可重提；开关两路（关=自动通过锁定；开=审批流转）
- #12 暂口径：经理个人户业绩不入聚合基数（金标准仅业务员个人户，
  聚合用例以「无经理台账」形态验证 items 按人汇总不聚合）
"""

import uuid

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

from app.core.db import get_session_factory
from app.models import MonthlySettlement
from tests.integration.factories import business_payload, customer

pytestmark = pytest.mark.integration

_SETTLEMENTS = "/api/v1/settlements"
_CALC = "/api/v1/calc"
_BUSINESSES = "/api/v1/business/businesses"
_SHIPMENTS = "/api/v1/business/shipments"
_RECEIPTS = "/api/v1/business/receipts"
_PERSONNEL = "/api/v1/base/personnel"

_GOLD_ITEMS = [
    {
        "product_name": "t_市政_月结",
        "product_category": "municipal_water",
        "quantity": "100",
        "sale_price": "100.00",
        "cost_amount": "3000.00",
    }
]


def _person(client: TestClient, headers: dict) -> dict:
    from sqlalchemy import select

    from app.core.constants import BUSINESS_ROLE_SALESPERSON
    from app.core.db import get_session_factory
    from app.models import BusinessRole

    factory = get_session_factory()
    with factory() as session:
        role_id = int(
            session.execute(
                select(BusinessRole.id).where(
                    BusinessRole.role_code == BUSINESS_ROLE_SALESPERSON,
                    BusinessRole.status == 1,
                )
            ).scalar_one()
        )

    resp = client.post(
        _PERSONNEL,
        json={
            "personnel_name": f"t_月结_{uuid.uuid4().hex[:8]}",
            "business_role_id": role_id,
            "salary_standard": "3000.00",
        },
        headers=headers,
    )
    assert resp.status_code == 200, resp.text
    return resp.json()["data"]


def _calc_one(client: TestClient, headers: dict) -> dict:
    """完整造一笔已核算回款（回款日 2026-10-20 → 归月 2026-10）。"""
    cust = customer(client, headers)
    person = _person(client, headers)
    resp = client.post(
        _BUSINESSES,
        json=business_payload(
            cust["id"],
            owner_personnel_id=person["id"],
            items=[dict(_GOLD_ITEMS[0], product_name=f"t_月结产品_{uuid.uuid4().hex[:6]}")],
        ),
        headers=headers,
    )
    assert resp.status_code == 200, resp.text
    biz = resp.json()["data"]

    resp = client.post(
        _SHIPMENTS,
        json={
            "business_id": biz["id"],
            "ship_date": "2026-10-01",
            "items": [{"product_name": "t_发", "quantity": "1", "sale_price": "1.00"}],
        },
        headers=headers,
    )
    assert resp.status_code == 200, resp.text

    resp = client.post(
        _RECEIPTS,
        json={
            "business_id": biz["id"],
            "receipt_date": "2026-10-20",
            "amount": "20000.00",
            "shipment_id": resp.json()["data"]["id"],
        },
        headers=headers,
    )
    assert resp.status_code == 200, resp.text
    receipt = resp.json()["data"]

    resp = client.post(f"{_CALC}/receipts/{receipt['id']}/calc", headers=headers)
    assert resp.status_code == 200, resp.text
    return biz


@pytest.fixture
def finance(make_user, auth_headers) -> dict:
    user = make_user(["finance"])
    user["headers"] = auth_headers(user)
    return user


class TestGenerate:
    """生成快照：确认回款口径与按人汇总。"""

    def test_生成_按人汇总并回填台账(self, client: TestClient, admin: dict) -> None:
        _calc_one(client, admin["headers"])
        resp = client.post(
            f"{_SETTLEMENTS}/generate", json={"month": "2026-10"}, headers=admin["headers"]
        )
        assert resp.status_code == 200, resp.text
        out = resp.json()["data"]
        assert out["settlement_month"] == "2026-10"
        assert out["status"] == 1  # 草稿
        assert len(out["items"]) >= 1
        item = out["items"][0]
        assert item["is_probation"] in (0, 1)

        # 台账行已回填 settlement_id（入结标记，防重复计入）
        factory = get_session_factory()
        with factory() as session:
            settled = session.execute(
                select(MonthlySettlement).where(MonthlySettlement.settlement_month == "2026-10")
            ).scalar_one()
            assert settled.person_count >= 1

    def test_无核算记录生成400(self, client: TestClient, admin: dict) -> None:
        resp = client.post(
            f"{_SETTLEMENTS}/generate", json={"month": "2099-01"}, headers=admin["headers"]
        )
        assert resp.status_code == 400
        assert "无可结算" in resp.json()["message"]

    def test_已审定月份重生成400(self, client: TestClient, admin: dict) -> None:
        _calc_one(client, admin["headers"])
        assert (
            client.post(
                f"{_SETTLEMENTS}/generate", json={"month": "2026-10"}, headers=admin["headers"]
            ).status_code
            == 200
        )
        # 提交（开关默认关）→ 自动通过锁定
        sid = client.get(f"{_SETTLEMENTS}", headers=admin["headers"]).json()["data"]["list"][0][
            "id"
        ]
        assert (
            client.post(f"{_SETTLEMENTS}/{sid}/submit", headers=admin["headers"]).status_code == 200
        )
        resp = client.post(
            f"{_SETTLEMENTS}/generate", json={"month": "2026-10"}, headers=admin["headers"]
        )
        assert resp.status_code == 400
        # 已核算禁改（M2 防线）先于月结锁定拦截生效——两者均 400 拒改
        assert ("已核算" in resp.json()["message"]) or ("锁定" in resp.json()["message"])


class TestSubmitAndLock:
    """提交审批与锁定（开关两路）。"""

    def test_开关关闭_提交即自动通过锁定(
        self, client: TestClient, admin: dict, finance: dict
    ) -> None:
        _calc_one(client, admin["headers"])
        resp = client.post(
            f"{_SETTLEMENTS}/generate", json={"month": "2026-10"}, headers=admin["headers"]
        )
        sid = resp.json()["data"]["id"]
        resp = client.post(f"{_SETTLEMENTS}/{sid}/submit", headers=admin["headers"])
        assert resp.status_code == 200, resp.text
        out = resp.json()["data"]
        assert out["status"] == 3  # 自动通过=已审定（锁定）
        assert out["approval_order_no"] and out["approval_order_no"].startswith("AP")
        assert out["locked_at"] is not None

    def test_锁定后回款禁改(self, client: TestClient, admin: dict) -> None:
        from sqlalchemy import select

        biz = _calc_one(client, admin["headers"])
        client.post(f"{_SETTLEMENTS}/generate", json={"month": "2026-10"}, headers=admin["headers"])
        sid = client.get(f"{_SETTLEMENTS}", headers=admin["headers"]).json()["data"]["list"][0][
            "id"
        ]
        client.post(f"{_SETTLEMENTS}/{sid}/submit", headers=admin["headers"])

        # 找该月回款并尝试编辑（400：月已锁定）
        factory = get_session_factory()
        with factory() as session:
            from app.models import Receipt

            receipt_id = int(
                session.execute(
                    select(Receipt.id).where(Receipt.business_id == biz["id"])
                ).scalar_one()
            )
        resp = client.put(
            f"{_RECEIPTS}/{receipt_id}",
            json={
                "business_id": biz["id"],
                "receipt_date": "2026-10-21",
                "amount": "999.00",
            },
            headers=admin["headers"],
        )
        assert resp.status_code == 400
        # 已核算禁改（M2 防线）先于月结锁定拦截生效——两者均 400 拒改
        assert ("已核算" in resp.json()["message"]) or ("锁定" in resp.json()["message"])


class TestSwitchOn:
    """开关开启：审批流转后锁定。"""

    def test_提交待审_通过后锁定(
        self, client: TestClient, admin: dict, finance: dict, make_user, auth_headers
    ) -> None:
        # 开月结审批开关（立即生效）
        resp = client.post(
            "/api/v1/system/params/changes",
            json={
                "change_type": 1,
                "remark": "开月结审批",
                "items": [
                    {
                        "param_code": "approval.monthly_settlement.enabled",
                        "dimension_value": "",
                        "value": "1",
                    }
                ],
            },
            headers=admin["headers"],
        )
        assert resp.status_code == 200, resp.text

        leader = make_user(["leader"])
        leader["headers"] = auth_headers(leader)

        # 造 11 月的台账（避开 10 月已入结月份）
        cust = customer(client, admin["headers"])
        person = _person(client, admin["headers"])
        resp = client.post(
            _BUSINESSES,
            json=business_payload(
                cust["id"],
                owner_personnel_id=person["id"],
                items=[dict(_GOLD_ITEMS[0], product_name=f"t_11月_{uuid.uuid4().hex[:6]}")],
            ),
            headers=admin["headers"],
        )
        assert resp.status_code == 200, resp.text
        biz = resp.json()["data"]
        resp = client.post(
            _SHIPMENTS,
            json={
                "business_id": biz["id"],
                "ship_date": "2026-11-01",
                "items": [{"product_name": "t_发", "quantity": "1", "sale_price": "1.00"}],
            },
            headers=admin["headers"],
        )
        assert resp.status_code == 200, resp.text
        shipment = resp.json()["data"]
        resp = client.post(
            _RECEIPTS,
            json={
                "business_id": biz["id"],
                "receipt_date": "2026-11-20",
                "amount": "20000.00",
                "shipment_id": shipment["id"],
            },
            headers=admin["headers"],
        )
        assert resp.status_code == 200, resp.text
        receipt = resp.json()["data"]
        assert (
            client.post(
                f"{_CALC}/receipts/{receipt['id']}/calc", headers=admin["headers"]
            ).status_code
            == 200
        )

        resp = client.post(
            f"{_SETTLEMENTS}/generate", json={"month": "2026-11"}, headers=admin["headers"]
        )
        assert resp.status_code == 200, resp.text
        sid = resp.json()["data"]["id"]

        # 提交 → 待财务复核
        resp = client.post(f"{_SETTLEMENTS}/{sid}/submit", headers=admin["headers"])
        assert resp.status_code == 200, resp.text
        assert resp.json()["data"]["status"] == 2

        # 财务通过 → 待领导（approval_order_no 关联的审批单流转）
        order_no = resp.json()["data"]["approval_order_no"]
        order = client.get(
            "/api/v1/system/approvals", params={"keyword": order_no}, headers=admin["headers"]
        ).json()["data"]["list"][0]
        resp = client.post(
            f"/api/v1/system/approvals/{order['id']}/action",
            json={"action": 1},
            headers=finance["headers"],
        )
        assert resp.status_code == 200, resp.text

        # 领导通过 → 锁定
        resp = client.post(
            f"/api/v1/system/approvals/{order['id']}/action",
            json={"action": 1},
            headers=leader["headers"],
        )
        assert resp.status_code == 200, resp.text
        final = client.get(f"{_SETTLEMENTS}/{sid}", headers=admin["headers"]).json()["data"]
        assert final["status"] == 3
        assert final["locked_at"] is not None
        assert final["locked_by"] == leader["username"]  # 审批通过人=领导账号