import uuid

from pydantic import EmailStr
from sqlmodel import Field, Relationship, SQLModel


# 共享属性
class UserBase(SQLModel):
    email: EmailStr = Field(unique=True, index=True, max_length=255)
    is_active: bool = True
    is_superuser: bool = False
    full_name: str | None = Field(default=None, max_length=255)


# 创建用户时通过 API 接收的属性
class UserCreate(UserBase):
    password: str = Field(min_length=8, max_length=128)


class UserRegister(SQLModel):
    email: EmailStr = Field(max_length=255)
    password: str = Field(min_length=8, max_length=128)
    full_name: str | None = Field(default=None, max_length=255)


# 更新用户时通过 API 接收的属性，所有字段均为可选
class UserUpdate(UserBase):
    email: EmailStr | None = Field(default=None, max_length=255)  # type: ignore
    password: str | None = Field(default=None, min_length=8, max_length=128)


class UserUpdateMe(SQLModel):
    full_name: str | None = Field(default=None, max_length=255)
    email: EmailStr | None = Field(default=None, max_length=255)


class UpdatePassword(SQLModel):
    current_password: str = Field(min_length=8, max_length=128)
    new_password: str = Field(min_length=8, max_length=128)


# 数据库模型，数据库表名从类名推断
class User(UserBase, table=True):
    id: uuid.UUID = Field(default_factory=uuid.uuid4, primary_key=True)
    hashed_password: str
    items: list["Item"] = Relationship(back_populates="owner", cascade_delete=True)


# 通过 API 返回的属性，id 始终必填
class UserPublic(UserBase):
    id: uuid.UUID


class UsersPublic(SQLModel):
    data: list[UserPublic]
    count: int


# 共享属性
class ItemBase(SQLModel):
    title: str = Field(min_length=1, max_length=255)
    description: str | None = Field(default=None, max_length=255)


# 创建 Item 时接收的属性
class ItemCreate(ItemBase):
    pass


# 更新 Item 时接收的属性
class ItemUpdate(ItemBase):
    title: str | None = Field(default=None, min_length=1, max_length=255)  # type: ignore


# 数据库模型，数据库表名从类名推断
class Item(ItemBase, table=True):
    id: uuid.UUID = Field(default_factory=uuid.uuid4, primary_key=True)
    owner_id: uuid.UUID = Field(
        foreign_key="user.id", nullable=False, ondelete="CASCADE"
    )
    owner: User | None = Relationship(back_populates="items")


# 通过 API 返回的属性，id 始终必填
class ItemPublic(ItemBase):
    id: uuid.UUID
    owner_id: uuid.UUID


class ItemsPublic(SQLModel):
    data: list[ItemPublic]
    count: int


# 通用消息
class Message(SQLModel):
    message: str


# 包含访问令牌的 JSON 载荷
class Token(SQLModel):
    access_token: str
    token_type: str = "bearer"


# JWT 令牌内容
class TokenPayload(SQLModel):
    sub: str | None = None


class NewPassword(SQLModel):
    token: str
    new_password: str = Field(min_length=8, max_length=128)