"""绩效核算台账模型（M3 ④：每笔回款仅核算一次的固化点）。

**append-only 版本行**：重算 = 插入 calc_version+1 的新行，旧行仅把
is_active 翻 0 —— 这是全表唯一的受控 UPDATE（模型注释与 test_models
均已声明例外），行内容永不改写；历史版本可回溯（重算授权留痕的需求口径）。

防重三层：服务层 CAS（UPDATE ... WHERE settlement_status=0，rowcount=0
即 400）+ FOR UPDATE 行锁 + 库级 uk(receipt_id, calc_version, personnel_id)
兜底。uk 含 personnel_id：二次分配分摊（澄清 #1 答复 2026-10-19，分配
绩效——按方案比例拆给参与人、余额归合同负责人）后同一回款同版本按人
各落一行，拆分仍是「一次核算」的组成部分；聚合行 receipt_id 为 NULL，
MySQL 唯一索引对 NULL 不去重，天然不约束。

经理聚合行（calc_type=2，receipt_id 为 NULL）：月度批处理时按「本团队
业务员绩效 ×12.5% + 全公司 ×5%」落一行；其唯一性由月结生成的
settlement_month 串行化 + 服务层保证（MySQL 无部分唯一索引，docstring
声明即可）。

#12 答复（2026-10-19）：经理个人户业绩是否计入聚合基数改为参数
``manager.personal.included``（默认 0=不计入）——消费点在 settlement_service
的聚合函数。
"""

from datetime import date
from decimal import Decimal

from sqlalchemy import (
    JSON,
    Date,
    ForeignKey,
    Index,
    Numeric,
    String,
    UniqueConstraint,
)
from sqlalchemy.orm import Mapped, mapped_column

from app.models.base import BIGINT_UNSIGNED, TINYINT_TYPE, Base, TimestampMixin, mysql_table_args

# 核算类型（performance_ledgers.calc_type）
CALC_TYPE_RECEIPT = 1  # 单笔回款核算
CALC_TYPE_MANAGER_AGGREGATE = 2  # 经理团队聚合（月度批处理）


class PerformanceLedger(Base, TimestampMixin):
    """绩效核算台账表：核算事实的固化点，报表 2.4.1 的数据源。"""

    __tablename__ = "performance_ledgers"
    __table_args__ = mysql_table_args(
        "绩效核算台账表（append-only 版本行；重算插新版本旧行仅翻 is_active）",
        # 库级防重兜底：同一回款同版本按人仅一行（分摊拆行后负责人+参与人
        # 各占一行；服务层 CAS+行锁之外的第二道闸）。聚合行 receipt_id 为
        # NULL，MySQL 唯一索引对 NULL 不去重，天然不约束聚合行
        UniqueConstraint(
            "receipt_id",
            "calc_version",
            "personnel_id",
            "allocation_key",
            name="uk_performance_ledgers_receipt_id_calc_version_personnel",
        ),
        Index("idx_performance_ledgers_month_active", "settlement_month", "is_active"),
        Index(
            "idx_performance_ledgers_month_personnel_type",
            "settlement_month",
            "personnel_id",
            "calc_type",
        ),
        Index("idx_performance_ledgers_personnel_id", "personnel_id"),
        Index("idx_performance_ledgers_receipt_id", "receipt_id"),
        Index("idx_performance_ledgers_business_id", "business_id"),
    )

    id: Mapped[int] = mapped_column(
        BIGINT_UNSIGNED, primary_key=True, autoincrement=True, comment="主键ID"
    )
    receipt_id: Mapped[int | None] = mapped_column(
        BIGINT_UNSIGNED,
        ForeignKey("receipts.id", ondelete="RESTRICT"),
        comment="回款ID（receipts.id；聚合行可为 NULL）",
    )
    calc_version: Mapped[int] = mapped_column(
        TINYINT_TYPE,
        nullable=False,
        server_default="1",
        comment="核算版本（重算+1，旧行 is_active=0）",
    )
    allocation_key: Mapped[str] = mapped_column(
        String(64), nullable=False, server_default="''", comment="正式FIFO事件键；历史单笔核算为空串",
    )
    is_active: Mapped[int] = mapped_column(
        TINYINT_TYPE,
        nullable=False,
        server_default="1",
        comment="生效标记：1当前生效 0已被重算替代（重算受控 UPDATE 例外）",
    )
    calc_type: Mapped[int] = mapped_column(
        TINYINT_TYPE,
        nullable=False,
        server_default="1",
        comment="核算类型：1单笔回款 2经理团队聚合（月度）",
    )
    business_id: Mapped[int] = mapped_column(
        BIGINT_UNSIGNED,
        comment="业务ID（固化无外键；聚合行为该经理名下首行业务ID，报表下钻锚点）",
    )
    business_no: Mapped[str] = mapped_column(
        String(32), nullable=False, comment="业务编号（冗余固化，列表免联查）"
    )
    personnel_id: Mapped[int] = mapped_column(
        BIGINT_UNSIGNED,
        ForeignKey("personnel.id", ondelete="RESTRICT"),
        nullable=False,
        comment="归属营销人员ID（personnel.id；核算归属锚点）",
    )
    personnel_name: Mapped[str] = mapped_column(
        String(64), nullable=False, comment="归属营销人员姓名（冗余固化）"
    )
    role_code: Mapped[str] = mapped_column(
        String(32), nullable=False, comment="岗位编码（business_roles.role_code，计提公式锚点）"
    )
    customer_type: Mapped[str] = mapped_column(
        String(32), nullable=False, comment="客户分类：personal/manager_personal/enterprise"
    )
    product_category: Mapped[str] = mapped_column(
        String(32),
        nullable=False,
        comment="产品类别：municipal_water/rail_transit/mixed（混合业务，行级明细入 snapshot_json）",
    )
    ship_date: Mapped[date | None] = mapped_column(Date, comment="发货日期（回款天数基准）")
    receipt_date: Mapped[date] = mapped_column(
        Date, nullable=False, comment="回款日期（参数版本匹配日，裁决 #11）"
    )
    payment_days: Mapped[int | None] = mapped_column(
        comment="回款天数（发货日首日计第 1 天；未指定批次为 NULL；先款后货照实负值）"
    )
    rate_text: Mapped[str] = mapped_column(
        String(32),
        nullable=False,
        comment="计提比例原文（如 4/360，防 Fraction 截断；聚合行存 12.5%/5% 结构说明）",
    )
    converted_profit: Mapped[Decimal | None] = mapped_column(
        Numeric(14, 2), comment="折算毛利润额（可负；混合业务为各行汇总）"
    )
    performance_amount: Mapped[Decimal | None] = mapped_column(
        Numeric(14, 2), comment="绩效金额（可负，裁决：负绩效照算不归零）"
    )
    barter_applied: Mapped[int] = mapped_column(
        TINYINT_TYPE,
        nullable=False,
        server_default="0",
        comment="以物抵顶折算：1已按 80% 折算 0否",
    )
    weight_r: Mapped[int | None] = mapped_column(comment="支付权重 R（回款占销售额百分比向下取整）")
    payment_weight: Mapped[Decimal | None] = mapped_column(
        Numeric(7, 6), comment="支付权重系数 R×R（展示用）"
    )
    payable_amount: Mapped[Decimal | None] = mapped_column(
        Numeric(14, 2), comment="当期应付绩效（绩效 × 支付权重；聚合行为当月汇总）"
    )
    settlement_month: Mapped[str] = mapped_column(
        String(7), nullable=False, comment="归属月（回款日期所在月，YYYY-MM；月结与报表维度）"
    )
    is_probation: Mapped[int] = mapped_column(
        TINYINT_TYPE,
        nullable=False,
        server_default="0",
        comment="试用期：1照算不发放 0否",
    )
    missing_cost: Mapped[int] = mapped_column(
        TINYINT_TYPE,
        nullable=False,
        server_default="0",
        comment="成本缺失：1有明细行缺成本（该行毛利按 0 计）0否",
    )
    snapshot_json: Mapped[dict | None] = mapped_column(
        JSON, comment="计算快照（所用参数版本与行级折算明细，重算可回溯）"
    )
    settlement_id: Mapped[int | None] = mapped_column(
        BIGINT_UNSIGNED,
        ForeignKey("monthly_settlements.id", ondelete="RESTRICT"),
        comment="所属月结ID（月结生成时回填；NULL=未入结）",
    )
    calc_reason: Mapped[str | None] = mapped_column(
        String(255), comment="核算/重算原因（重算必填留痕）"
    )
    remark: Mapped[str | None] = mapped_column(String(255), comment="备注")