"""审批管理的请求/响应模型（2026-10-15 复核审批补充需求）。"""

from datetime import datetime
from typing import Any, Literal

from pydantic import BaseModel, ConfigDict, Field, model_validator

from app.core.response import PageQuery


class ApprovalStepOut(BaseModel):
    """节点记录（时间线；action=3 自动通过 operator 记「系统」）。"""

    model_config = ConfigDict(from_attributes=True)

    id: int
    node: int
    action: int
    opinion: str | None = None
    operator_id: int | None = None
    operator_name: str
    create_time: datetime


class ApprovalOrderOut(BaseModel):
    """审批单列表行。"""

    model_config = ConfigDict(from_attributes=True)

    id: int
    order_no: str
    order_type: int
    ref_id: int
    refer_no: str
    version_no: int
    status: int
    submitter_id: int | None = None
    submitter_name: str
    create_time: datetime


class ApprovalOrderDetailOut(ApprovalOrderOut):
    """审批单详情：附节点时间线与审批内容。

    ``content_source`` 语义：``snapshot``=提交时快照（可信）；
    ``live``=历史单无快照、回退读当前业务内容（仅供参考）；
    ``missing``=引用对象已不存在且无快照。
    """

    steps: list[ApprovalStepOut] = Field(default_factory=list)
    snapshot: dict[str, Any] | None = Field(
        default=None, description="提交时内容快照（信封：schema_version/order_type/captured_at/data）"
    )
    content_source: Literal["snapshot", "live", "missing"] = Field(
        default="missing", description="审批内容来源：提交时快照/当前内容回退/缺失"
    )


class ApprovalQuery(PageQuery):
    """审批单列表查询条件。"""

    keyword: str | None = Field(default=None, max_length=32, description="审批单号/引用单号，模糊")
    status: int | None = Field(default=None, ge=1, le=5, description="状态筛选")
    order_type: int | None = Field(default=None, ge=1, le=3, description="对象类型筛选")


class ApprovalActionIn(BaseModel):
    """节点动作：1 通过 / 2 驳回（驳回须填意见——空驳无从追溯）。"""

    model_config = ConfigDict(str_strip_whitespace=True)

    action: int = Field(ge=1, le=2, description="1通过 2驳回")
    opinion: str | None = Field(default=None, max_length=255, description="审批意见")

    @model_validator(mode="after")
    def _check_opinion(self) -> "ApprovalActionIn":
        if self.action == 2 and not self.opinion:
            raise ValueError("驳回必须填写审批意见")
        return self