from typing import List, Optional

from pydantic import BaseModel, ConfigDict, field_validator
from pydantic.alias_generators import to_camel


def _coerce_optional_id(value):
    if value is None:
        return None
    return str(value).strip()


class WorkflowNodeCreate(BaseModel):
    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)

    node_name: str
    node_order: int
    approver_id: Optional[str] = None
    approver_name: Optional[str] = None

    @field_validator("approver_id", mode="before")
    @classmethod
    def validate_approver_id(cls, value):
        return _coerce_optional_id(value)


class WorkflowNodeOut(BaseModel):
    model_config = ConfigDict(from_attributes=True, populate_by_name=True, alias_generator=to_camel)

    id: str
    node_name: str
    node_order: int
    approver_id: Optional[str] = None
    approver_name: Optional[str] = None


class WorkflowDefCreate(BaseModel):
    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)

    biz_type: str
    wf_name: str
    status: int = 1
    nodes: Optional[List[WorkflowNodeCreate]] = None


class WorkflowDefUpdate(BaseModel):
    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)

    biz_type: Optional[str] = None
    wf_name: Optional[str] = None
    status: Optional[int] = None
    nodes: Optional[List[WorkflowNodeCreate]] = None


class WorkflowDefOut(BaseModel):
    model_config = ConfigDict(from_attributes=True, populate_by_name=True, alias_generator=to_camel)

    id: str
    biz_type: str
    wf_name: str
    status: int
    create_by: Optional[str] = None
    nodes: List[WorkflowNodeOut] = []