"""报表统计集成测试（M4 ⑤）。

守的口径（破坏了就是报表数字与台账对不上）：
- 个人明细与台账逐笔一致；summary 为**全筛选**合计而非当前页合计
- 部门汇总团队基数 = 成员绩效合计；12.5%/5% 分成按参数；无成员经理出 0 行
- 回款统计 8 个区间桶恒在（空桶为 0）；**二次分摊拆行时回款金额只计一次**
- 业务统计排除经理聚合行（calc_type=2），绩效不被整团队聚合额污染
- 导出 xlsx 可解析且含签字栏；导出行为入操作日志
- 权限：普通用户 403 且文案为「无权访问报表统计」
"""

import uuid
from decimal import Decimal

import pytest
from fastapi.testclient import TestClient

pytestmark = pytest.mark.integration

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


def _role_id(code: str) -> int:
    """取内置业务岗位 id（salesperson / sales_manager）。"""
    from sqlalchemy import select

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

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


def _person(client: TestClient, headers: dict, *, role: str = "salesperson", manager_id=None) -> dict:
    body = {
        "personnel_name": f"t_报表_{uuid.uuid4().hex[:8]}",
        "business_role_id": _role_id(role),
        "salary_standard": "3000.00",
    }
    if manager_id is not None:
        body["manager_id"] = manager_id
    resp = client.post(_PERSONNEL, json=body, headers=headers)
    assert resp.status_code == 200, resp.text
    return resp.json()["data"]


def _full_chain(
    client: TestClient,
    headers: dict,
    *,
    owner_id: int,
    customer_id: int | None = None,
    allocations: list[dict] | None = None,
) -> tuple[dict, dict]:
    """业务（单行 100×100，成本 3000）→ 发货（60 天前）→ 回款 → 核算。"""
    from tests.integration.factories import business_item, business_payload, customer

    cust = customer(client, headers) if customer_id is None else {"id": customer_id}
    payload = business_payload(
        cust["id"],
        owner_personnel_id=owner_id,
        items=[business_item(cost_amount="3000.00")],
    )
    if allocations:
        payload["secondary_allocations"] = allocations
    resp = client.post(_BUSINESSES, json=payload, headers=headers)
    assert resp.status_code == 200, resp.text
    business = resp.json()["data"]

    from datetime import date, timedelta

    ship_date = (date.today() - timedelta(days=60)).isoformat()
    resp = client.post(
        _SHIPMENTS,
        json={
            "business_id": business["id"],
            "ship_date": ship_date,
            "items": [{"product_name": "t_发货物", "quantity": "1", "sale_price": "1.00"}],
        },
        headers=headers,
    )
    assert resp.status_code == 200, resp.text
    shipment = resp.json()["data"]

    resp = client.post(
        _RECEIPTS,
        json={
            "business_id": business["id"],
            "receipt_date": date.today().isoformat(),
            "amount": "10000.00",
            "shipment_id": shipment["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 business, receipt


def _month() -> str:
    from datetime import date

    return date.today().strftime("%Y-%m")


def _ledger_sum(headers: dict, month: str) -> Decimal:
    """台账（单笔生效行）同月绩效合计——报表 summary 的对照基准。"""
    from sqlalchemy import func, select

    from app.core.db import get_session_factory
    from app.models import PerformanceLedger

    factory = get_session_factory()
    with factory() as session:
        return Decimal(
            str(
                session.execute(
                    select(func.coalesce(func.sum(PerformanceLedger.performance_amount), 0)).where(
                        PerformanceLedger.settlement_month == month,
                        PerformanceLedger.calc_type == 1,
                        PerformanceLedger.is_active == 1,
                    )
                ).scalar_one()
            )
        )


def test_个人明细_与台账一致且summary为全量合计(client: TestClient, admin: dict):
    """明细行金额必须等于台账；pageSize=1 时 summary 仍是全部筛选结果之和。"""
    person = _person(client, admin["headers"])
    _full_chain(client, admin["headers"], owner_id=person["id"])
    month = _month()

    resp = client.get(
        f"{_REPORTS}/personal-detail",
        params={"settlement_month": month, "pageSize": 1},
        headers=admin["headers"],
    )
    assert resp.status_code == 200, resp.text
    data = resp.json()["data"]
    assert data["total"] == 1
    expected = _ledger_sum(admin["headers"], month)
    assert Decimal(str(data["list"][0]["performance_amount"])) == expected
    assert Decimal(str(data["summary"]["performance_total"])) == expected


def test_部门汇总_团队基数等于成员绩效且分成按参数(admin, client: TestClient):
    """团队基数=成员绩效合计；12.5% 团队分成与 5% 全公司分成分别可核。"""
    manager = _person(client, admin["headers"], role="sales_manager")
    salesperson = _person(client, admin["headers"], manager_id=manager["id"])
    _full_chain(client, admin["headers"], owner_id=salesperson["id"])
    month = _month()

    resp = client.get(
        f"{_REPORTS}/department-summary",
        params={"settlement_month": month},
        headers=admin["headers"],
    )
    assert resp.status_code == 200, resp.text
    data = resp.json()["data"]

    team = next(t for t in data["teams"] if t["manager_id"] == manager["id"])
    ledger_total = _ledger_sum(admin["headers"], month)
    assert Decimal(str(team["team_base"])) == ledger_total
    expected_share = (ledger_total * Decimal("0.125")).quantize(Decimal("0.01"))
    assert Decimal(str(team["team_share_amount"])) == expected_share
    assert team["member_count"] == 1
    assert data["company"]["company_base"] == team["team_base"]


def test_部门汇总_无成员经理出零值行(admin, client: TestClient):
    """无团队成员 → 0 行展示（FR-030 异常处理）。"""
    manager = _person(client, admin["headers"], role="sales_manager")
    month = _month()
    resp = client.get(
        f"{_REPORTS}/department-summary",
        params={"settlement_month": month},
        headers=admin["headers"],
    )
    assert resp.status_code == 200, resp.text
    team = next(
        (t for t in resp.json()["data"]["teams"] if t["manager_id"] == manager["id"]), None
    )
    assert team is not None
    assert Decimal(str(team["team_base"])) == Decimal("0")
    assert team["member_count"] == 0


def test_回款统计_空桶恒在且分摊拆行金额只计一次(admin, client: TestClient):
    """8 个区间桶恒在；二次分配拆行使台账多行但回款金额不得翻倍。"""
    owner = _person(client, admin["headers"])
    participant = _person(client, admin["headers"])
    _full_chain(
        client,
        admin["headers"],
        owner_id=owner["id"],
        allocations=[{"personnel_id": participant["id"], "ratio": "30.00"}],
    )
    month = _month()

    resp = client.get(
        f"{_REPORTS}/payment-stats",
        params={"settlement_month": month},
        headers=admin["headers"],
    )
    assert resp.status_code == 200, resp.text
    data = resp.json()["data"]

    assert len(data["buckets"]) == 8
    assert [b["code"] for b in data["buckets"]] == [
        "le0", "1-30", "31-60", "61-90", "91-180", "181-360", "361+", "none",
    ]
    # 60 天前发货 → 落在 61-90 桶（发货日首日计第 1 天）
    bucket = next(b for b in data["buckets"] if b["code"] == "61-90")
    assert Decimal(str(bucket["receipt_amount"])) == Decimal("10000.00")
    assert bucket["receipt_count"] == 1
    # 拆行后台账两行，但绩效合计仍等于台账总和
    assert bucket["ledger_count"] == 2
    empty = next(b for b in data["buckets"] if b["code"] == "361+")
    assert Decimal(str(empty["performance_amount"])) == Decimal("0")


def test_业务统计_绩效排除经理聚合行(admin, client: TestClient):
    """生成月结后出现 calc_type=2 聚合行，业务统计不得把聚合额算进单业务。"""
    manager = _person(client, admin["headers"], role="sales_manager")
    salesperson = _person(client, admin["headers"], manager_id=manager["id"])
    business, _ = _full_chain(client, admin["headers"], owner_id=salesperson["id"])

    resp = client.post(
        f"{_SETTLEMENTS}/generate", json={"month": _month()}, headers=admin["headers"]
    )
    assert resp.status_code == 200, resp.text

    resp = client.get(
        f"{_REPORTS}/business-stats",
        params={"keyword": business["business_no"]},
        headers=admin["headers"],
    )
    assert resp.status_code == 200, resp.text
    row = resp.json()["data"]["list"][0]
    assert Decimal(str(row["performance_amount"])) == _ledger_sum(admin["headers"], _month())


def test_导出_excel含签字栏且入操作日志(admin, client: TestClient):
    """导出是文件流（非统一信封）；模板含复核/签字栏；行为入操作日志。"""
    from io import BytesIO

    from openpyxl import load_workbook

    person = _person(client, admin["headers"])
    _full_chain(client, admin["headers"], owner_id=person["id"])

    resp = client.get(
        f"{_REPORTS}/personal-detail/export",
        params={"settlement_month": _month()},
        headers=admin["headers"],
    )
    assert resp.status_code == 200, resp.text
    assert resp.headers["content-type"].startswith(
        "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
    )
    workbook = load_workbook(BytesIO(resp.content))
    text = "\n".join(
        str(cell.value)
        for row in workbook.active.iter_rows()
        for cell in row
        if cell.value is not None
    )
    assert "个人绩效工资明细表" in text
    assert "财务复核" in text
    assert "领导签字" in text

    from sqlalchemy import select

    from app.core.db import get_session_factory
    from app.models import OperationLog

    factory = get_session_factory()
    with factory() as session:
        log = session.execute(
            select(OperationLog)
            .where(OperationLog.module == "报表统计", OperationLog.action == "导出")
            .order_by(OperationLog.id.desc())
        ).scalars().first()
    assert log is not None


def test_权限_普通用户403文案(admin, normal, client: TestClient):
    """报表限管理员/财务/领导；普通用户被后端拦截且文案正确。"""
    resp = client.get(f"{_REPORTS}/personal-detail", headers=normal["headers"])
    assert resp.status_code == 403
    assert resp.json()["message"] == "无权访问报表统计"