"""报表辅助纯函数与 Excel 模板构建单元测试（M4 ⑤）。

这组用例守的是「不测会静默出错」的三类点：
- 区间分桶边界错一档 → 金额进错桶，但报表仍然「能打开」，没人会发现
- 标签映射漏一个枚举值 → 报表少一类数据或显示英文编码
- 导出模板缺签字栏 / 金额被转 float / 文本公式注入 → 交给财务的签字稿失真
"""

import io
from datetime import date
from decimal import Decimal

from openpyxl import load_workbook

from app.core import report_meta
from app.core.constants import CUSTOMER_TYPES, PRODUCT_CATEGORIES
from app.services import report_export


class Test区间分桶:
    """回款天数 → 8 档区间（含 ≤0 与无天数两个兜底桶）。"""

    def test_边界值全部落入正确区间(self):
        cases = [
            (None, "none"),
            (-5, "le0"),
            (0, "le0"),
            (1, "1-30"),
            (30, "1-30"),
            (31, "31-60"),
            (60, "31-60"),
            (61, "61-90"),
            (90, "61-90"),
            (91, "91-180"),
            (180, "91-180"),
            (181, "181-360"),
            (360, "181-360"),
            (361, "361+"),
            (1000, "361+"),
        ]
        for days, code in cases:
            assert report_meta.bucket_of(days).code == code, f"days={days}"

    def test_八档且编码唯一(self):
        buckets = report_meta.get_payment_day_buckets()
        assert len(buckets) == 8
        assert len({b.code for b in buckets}) == 8


class Test标签覆盖:
    """标签键集合必须覆盖业务常量——防常量新增后报表静默少算/显示编码。"""

    def test_客户类型标签覆盖全部类型(self):
        assert set(report_meta.CUSTOMER_TYPE_LABELS) >= CUSTOMER_TYPES

    def test_产品类别标签覆盖常量与混合业务(self):
        assert set(report_meta.PRODUCT_CATEGORY_LABELS) >= PRODUCT_CATEGORIES
        assert "mixed" in report_meta.PRODUCT_CATEGORY_LABELS


def _build(code: str, rows: list[dict], buckets: dict | None = None) -> bytes:
    return report_export.build_workbook(
        code=code,
        title="测试报表",
        filters="统计月份 2026-10",
        rows=rows,
        summary=None,
        buckets=buckets,
        template_version="V1.0",
        operator_name="admin",
        company_name="衍水集团",
    )


def _sheet_text(content: bytes) -> str:
    workbook = load_workbook(io.BytesIO(content))
    return "\n".join(
        str(cell.value)
        for row in workbook.active.iter_rows()
        for cell in row
        if cell.value is not None
    )


def _personal_row(**overrides) -> dict:
    row = {
        "business_no": "YW001",
        "ship_date": date(2026, 10, 1),
        "receipt_date": date(2026, 10, 20),
        "payment_days": 20,
        "product_category": "municipal_water",
        "customer_type": "personal",
        "role_name": "营销员",
        "rate_text": "88/9000",
        "weight_r": 100,
        "performance_amount": Decimal("39.11"),
        "payable_amount": Decimal("39.11"),
    }
    row.update(overrides)
    return row


class TestExcel模板:
    """导出稿是交给财务复核与领导签字的，结构缺失等同于没有模板。"""

    def test_页眉标题签字栏齐全(self):
        text = _sheet_text(_build("personal-detail", [_personal_row()]))
        assert "衍水集团" in text
        assert "测试报表" in text
        assert "统计月份 2026-10" in text
        assert "模板版本：V1.0" in text
        assert "财务复核" in text
        assert "领导签字" in text

    def test_空数据不炸且给提示行(self):
        text = _sheet_text(_build("personal-detail", []))
        assert "本筛选条件无数据" in text
        assert "财务复核" in text

    def test_金额为数值单元格且两位格式(self):
        # openpyxl 写入 Decimal 后读回为 int/float（Excel 单元格本身是数值），
        # 这里断言「是数值而非文本」+ 显示格式；计算精度在服务层 Decimal 侧保证
        content = _build("personal-detail", [_personal_row()])
        workbook = load_workbook(io.BytesIO(content))
        sheet = workbook.active
        amount_cells = [
            cell
            for row in sheet.iter_rows()
            for cell in row
            if isinstance(cell.value, (int, float)) and Decimal(str(cell.value)) == Decimal("39.11")
        ]
        assert amount_cells, "未找到金额数值单元格（Decimal 被转成了文本？）"
        assert amount_cells[0].number_format == "#,##0.00"

    def test_合计行等于明细之和且标签只出现一次(self):
        rows = [
            _personal_row(performance_amount=Decimal("10.00"), payable_amount=Decimal("10.00")),
            _personal_row(performance_amount=Decimal("5.50"), payable_amount=Decimal("5.50")),
        ]
        content = _build("personal-detail", rows)
        workbook = load_workbook(io.BytesIO(content))
        cells = [cell for row in workbook.active.iter_rows() for cell in row]
        values = [
            Decimal(str(cell.value)) for cell in cells if isinstance(cell.value, (int, float))
        ]
        assert Decimal("15.50") in values
        # 「合计」标签只写一次（写满每个文本列是回归缺陷）
        assert sum(1 for cell in cells if cell.value == "合计") == 1

    def test_文本公式注入被前置单引号(self):
        evil = '=HYPERLINK("http://evil")'
        content = _build("personal-detail", [_personal_row(business_no=evil)])
        workbook = load_workbook(io.BytesIO(content))
        values = [
            cell.value
            for row in workbook.active.iter_rows()
            for cell in row
            if isinstance(cell.value, str)
        ]
        assert any(value.startswith("'=") for value in values), "公式注入未转义"

    def test_回款统计附两个维度对比sheet(self):
        buckets = {
            "by_customer_type": [
                {
                    "label": "个人户",
                    "receipt_amount": Decimal("100.00"),
                    "performance_amount": Decimal("1.00"),
                    "payable_amount": Decimal("1.00"),
                    "ledger_count": 1,
                }
            ],
            "by_product_category": [],
        }
        content = _build(
            "payment-stats",
            [
                {
                    "label": "1-30 天",
                    "receipt_amount": Decimal("100.00"),
                    "receipt_count": 1,
                    "performance_amount": Decimal("1.00"),
                    "payable_amount": Decimal("1.00"),
                    "ledger_count": 1,
                }
            ],
            buckets=buckets,
        )
        workbook = load_workbook(io.BytesIO(content))
        assert workbook.sheetnames == ["回款统计", "客户类型对比", "产品类别对比"]

    def test_业务统计状态转中文(self):
        rows = [
            {
                "business_no": "YW001",
                "business_date": date(2026, 10, 1),
                "customer_name": "测试客户",
                "owner_personnel_name": "张三",
                "status": 2,
                "total_sale_amount": Decimal("100.00"),
                "total_ship_amount": Decimal("100.00"),
                "total_received_amount": Decimal("100.00"),
                "performance_amount": Decimal("1.00"),
                "payable_amount": Decimal("1.00"),
            }
        ]
        text = _sheet_text(_build("business-stats", rows))
        assert "已完成" in text


def _member(
    personnel_id: int,
    name: str,
    *,
    kind: str = "regular",
    performance: str = "0.00",
    payable: str = "0.00",
    adjust: str = "0.00",
    reason: str | None = None,
) -> dict:
    return {
        "personnel_id": personnel_id,
        "personnel_name": name,
        "role_code": "salesperson",
        "is_probation": 0,
        "member_kind": kind,
        "unassigned_reason": reason,
        "performance_sum": Decimal(performance),
        "payable_sum": Decimal(payable),
        "adjust_extra": Decimal(adjust),
        "adjust_deduct": Decimal("0"),
        "adjust_net": Decimal(adjust),
        "net_total": Decimal(payable) + Decimal(adjust),
        "ledger_ids": [],
    }


def _department_data(
    team_text: str = "12.5",
    company_text: str = "5",
    *,
    second_has_aggregate: bool = False,
) -> dict:
    """一份含成员、零成员团队与未分配人员的部门汇总出参。

    ``second_has_aggregate`` 打开后两位经理都有月结聚合行，用于验证
    全公司 5% 按人数累计（零成员团队默认不发 5%）。
    """
    second_aggregate = Decimal("600.00") if second_has_aggregate else Decimal("0")
    share_count = 2 if second_has_aggregate else 1
    aggregate_total = Decimal("1850.00") + second_aggregate
    payable_total = Decimal("10000.00") + Decimal("2000.00") + aggregate_total
    return {
        "settlement_month": "2026-10",
        "params": {
            "team_text": team_text,
            "company_text": company_text,
            "manager_personal_included": 0,
            "params_as_of": "2026-10-31",
        },
        "teams": [
            {
                "manager_id": 1,
                "manager_name": "张经理",
                "manager_status": 1,
                "member_count": 1,
                "team_base": Decimal("10000.00"),
                "team_share_amount": Decimal("1250.00"),
                "company_share_amount": Decimal("600.00"),
                "has_aggregate": True,
                "aggregate_amount": Decimal("1850.00"),
                "team_subtotal": Decimal("1850.00"),
                "company_base_ratio": Decimal("0.8333"),
                "adjust_extra": Decimal("0"),
                "adjust_deduct": Decimal("0"),
                "adjust_net": Decimal("0"),
                "net_total": Decimal("1850.00"),
                "frozen_amount": None,
                "aggregate_ledger_id": None,
                "members": [
                    _member(
                        2,
                        "李业务",
                        performance="10000.00",
                        payable="10000.00",
                    )
                ],
            },
            {
                "manager_id": 3,
                "manager_name": "王经理",
                "manager_status": 1,
                "member_count": 0,
                "team_base": Decimal("0"),
                "team_share_amount": Decimal("0"),
                "company_share_amount": second_aggregate,
                "has_aggregate": second_has_aggregate,
                "aggregate_amount": second_aggregate,
                "team_subtotal": second_aggregate,
                "company_base_ratio": Decimal("0"),
                "adjust_extra": Decimal("0"),
                "adjust_deduct": Decimal("0"),
                "adjust_net": Decimal("0"),
                "net_total": second_aggregate,
                "frozen_amount": None,
                "aggregate_ledger_id": None,
                "members": [],
            },
        ],
        "unassigned": [
            _member(
                4,
                "赵未分配",
                performance="2000.00",
                payable="2000.00",
                reason="无经理或上级非营销经理",
            )
        ],
        "company": {
            "team_base_total": Decimal("10000.00"),
            "company_base": Decimal("12000.00"),
            "company_share_pct": company_text,
            "company_share_amount": Decimal("600.00"),
            "company_share_count": share_count,
            "company_share_total": Decimal("600.00") * share_count,
        },
        "reconciliation": {
            "team_member_payable_total": Decimal("10000.00"),
            "unassigned_payable_total": Decimal("2000.00"),
            "team_share_total": Decimal("1250.00"),
            "company_share_total": Decimal("600.00") * share_count,
            "aggregate_payable_total": aggregate_total,
            "aggregate_rounding_diff": Decimal("0"),
            "adjust_net_total": Decimal("0"),
            "payable_total": payable_total,
            "team_base_total": Decimal("10000.00"),
            "unassigned_performance_total": Decimal("2000.00"),
            "other_team_base": Decimal("0"),
            "other_team_member_payable_total": Decimal("0"),
            "other_team_share_total": Decimal("0"),
            "other_team_company_share_total": Decimal("0"),
            "other_team_aggregate_total": Decimal("0"),
            "other_adjust_net_total": Decimal("0"),
            "company_base": Decimal("12000.00"),
        },
        "totals": {},
    }


def _build_department(data: dict) -> bytes:
    return report_export.build_workbook(
        code="department-summary",
        title="部门绩效工资汇总表",
        filters="统计月份 2026-10",
        rows=[],
        summary=None,
        buckets=None,
        department=data,
        template_version="V1.2",
        operator_name="admin",
        company_name="衍水集团",
    )


class Test部门汇总签字稿:
    """签字稿少了团队分成/5% 块/未分配/零成员团队，合计就会小于应发。"""

    def test_五块顺序完整(self):
        text = _sheet_text(_build_department(_department_data()))
        titles = [
            "一、团队分成汇总",
            "二、全公司分成（每位有聚合行",
            "三、对账汇总",
            "四、团队成员明细",
            "五、未分配人员明细",
        ]
        positions = [text.index(title) for title in titles]
        assert positions == sorted(positions), "签字稿块顺序错乱"
        assert "财务复核" in text and "领导签字" in text

    def test_零成员团队与未分配行存在(self):
        text = _sheet_text(_build_department(_department_data()))
        assert "王经理" in text
        assert "赵未分配" in text
        assert "无经理或上级非营销经理" in text

    def test_全公司分成按计入次数累计(self):
        """两位有聚合行的经理各计一次 5%；零成员团队不产生分成。"""
        one = _department_data()
        text = _sheet_text(_build_department(one))
        assert text.count("全公司分成（每位有聚合行") == 1
        assert "共 1 次" in text
        assert "13850" in text

        two = _department_data(second_has_aggregate=True)
        text = _sheet_text(_build_department(two))
        assert "共 2 次" in text
        # 团队成员应付 10000 + 未分配 2000 + 聚合 2450
        assert "14450" in text

    def test_应发合计取对账口径(self):
        text = _sheet_text(_build_department(_department_data()))
        assert "应发合计" in text
        # Excel 数值单元格读回为 int/float，金额断言只看数值本身
        assert "13850" in text

    def test_聚合行舍入差单列(self):
        data = _department_data()
        data["reconciliation"]["aggregate_rounding_diff"] = Decimal("-0.02")
        text = _sheet_text(_build_department(data))
        assert "聚合行舍入差" in text
        assert "-0.02" in text

    def test_比例标题参数化(self):
        text = _sheet_text(_build_department(_department_data("20", "6")))
        assert "团队分成（20%）" in text
        assert "6%" in text
        assert "12.5%" not in text
        assert "5%" not in text.replace("6%", "")