"""工作台的请求/响应模型（M4 ⑧）。

四区块一次返回（前端一次请求渲染整页，避免 6-10 次往返）：
经营绩效总览 / 待办事项 / 风险预警 / 最近动态。金额一律 Decimal
（序列化为字符串），前端不做数值运算。

待办与预警为**查询时实时派生**（不落库、不引调度器，见计划决策）；
⑥ T+ 同步未建前，同步相关条目用 `sync_available=false` 显式降级，
不返回伪造的 0 条。
"""

from datetime import date, datetime
from decimal import Decimal

from pydantic import BaseModel, Field


class TrendPoint(BaseModel):
    """近 6 个月趋势点（绩效按台账归属月，回款按到账月）。"""

    month: str
    performance_total: Decimal | None = None
    receipt_total: Decimal | None = None


class SettlementBrief(BaseModel):
    """当月月结状态（工作台总览角标）。"""

    exists: bool = False
    status: int | None = Field(default=None, description="1草稿 2待审批 3已审定 4已驳回")
    total_performance: Decimal | None = None
    total_payable: Decimal | None = None
    locked_at: datetime | None = None


class OverviewBlock(BaseModel):
    """经营绩效总览（FR-033）：口径与台账/月结一致。"""

    month: str
    performance_total: Decimal | None = Field(default=None, description="当月单笔绩效合计")
    payable_total: Decimal | None = Field(default=None, description="当月应付绩效合计")
    person_count: int = Field(default=0, description="当月有台账的人员数（拆行去重）")
    team_count: int = Field(default=0, description="在职营销经理数（团队数）")
    settlement: SettlementBrief
    trend: list[TrendPoint] = Field(default_factory=list, description="近 6 个月")
    note: str = Field(default="", description="口径说明（页面展示）")


class ApprovalTodoItem(BaseModel):
    """待审批条目。"""

    order_id: int
    order_no: str
    order_type: int
    submitter_name: str | None = None
    create_time: datetime


class ReceiptTodoItem(BaseModel):
    """回款未指定发货批次条目。"""

    receipt_id: int
    receipt_batch_no: str
    business_id: int
    business_no: str | None = None
    amount: Decimal
    receipt_date: date


class TodoBlock(BaseModel):
    """待办事项（FR-034，澄清 #11 起步范围）。"""

    pending_approval_total: int = 0
    pending_approvals: list[ApprovalTodoItem] = Field(default_factory=list)
    unassigned_receipt_total: int = 0
    unassigned_receipts: list[ReceiptTodoItem] = Field(default_factory=list)
    sync_available: bool = Field(default=False, description="⑥ 同步模块是否已启用")
    sync_failure_total: int = 0


class WarningItem(BaseModel):
    """风险预警条目（实时派生，不改变业务数据）。"""

    code: str = Field(description="规则编码：receipt_overdue / approval_timeout")
    level: str = Field(description="级别：warning / danger")
    object_type: str
    object_id: int
    title: str
    detail: str
    suggest: str
    link: str | None = Field(default=None, description="前端跳转路径")


class WarningBlock(BaseModel):
    """风险预警（FR-035，首批两条可算规则；同步规则待 ⑥）。"""

    enabled: bool = True
    receipt_overdue_days: int = 90
    approval_timeout_days: int = 3
    items: list[WarningItem] = Field(default_factory=list)
    receipt_overdue_total: int = 0
    approval_timeout_total: int = 0
    sync_available: bool = False


class ActivityItem(BaseModel):
    """最近动态条目（来源 operation_logs，只读聚合）。"""

    id: int
    module: str
    action: str
    summary: str
    username: str | None = None
    success: int
    create_time: datetime


class DashboardOut(BaseModel):
    """工作台四区块一次性响应。"""

    month: str
    overview: OverviewBlock
    todos: TodoBlock
    warnings: WarningBlock
    activities: list[ActivityItem] = Field(default_factory=list)