from __future__ import annotations

import uuid
from datetime import datetime
from typing import Optional

from pydantic import BaseModel, ConfigDict, Field, field_validator
from app.schemas.user import UserResponse

StudyRole = str


class StudyMemberCreate(BaseModel):
    user_id: uuid.UUID
    role_in_study: StudyRole = Field(min_length=1, max_length=20)
    is_active: bool = True

    @field_validator("role_in_study")
    @classmethod
    def validate_project_role(cls, value: str) -> str:
        role = value.strip()
        if role == "ADMIN":
            raise ValueError("ADMIN 不能作为项目角色")
        return role


class StudyMemberUpdate(BaseModel):
    role_in_study: Optional[StudyRole] = Field(default=None, min_length=1, max_length=20)
    is_active: Optional[bool] = None

    @field_validator("role_in_study")
    @classmethod
    def validate_project_role(cls, value: str | None) -> str | None:
        if value is None:
            return value
        role = value.strip()
        if role == "ADMIN":
            raise ValueError("ADMIN 不能作为项目角色")
        return role


class StudyMemberRead(BaseModel):
    id: uuid.UUID
    study_id: uuid.UUID
    user_id: uuid.UUID
    role_in_study: StudyRole
    is_active: bool
    added_at: datetime

    model_config = ConfigDict(from_attributes=True)


class StudyMemberReadWithUser(StudyMemberRead):
    user: Optional[UserResponse] = None