from datetime import datetime, UTC
from uuid import uuid4, UUID, uuid7

from sqlalchemy import DateTime
from sqlmodel import SQLModel, Field, Relationship
from authlib.integrations.sqla_oauth2 import OAuth2ClientMixin, OAuth2AuthorizationCodeMixin, OAuth2TokenMixin

from authentication.utils import bcrypt_sha256_hash


class BaseModel(SQLModel):
    id: UUID | None = Field(primary_key=True, default_factory=uuid7)
    created: datetime = Field(
        default_factory=lambda: datetime.now(tz=UTC),
        sa_type=DateTime(timezone=True),
    )
    updated: datetime = Field(
        default=None,
        nullable=True,
        sa_column_kwargs={
            'onupdate': lambda: datetime.now(tz=UTC),
        },
        sa_type=DateTime(timezone=True),
    )


class User(BaseModel, table=True):
    username: str = Field(unique=True, index=True)
    password: str = Field(nullable=False)

    email: str

    def set_password(self, value):
        self.password = bcrypt_sha256_hash(value)

class Session(BaseModel, table=True):
    user_id: UUID = Field(foreign_key='user.id', exclude=True)
    user: User = Relationship()

class ClientApplication(BaseModel, OAuth2ClientMixin, table=True):
    name: str

class AuthCode(BaseModel, OAuth2AuthorizationCodeMixin, table=True):
    user_id: UUID = Field(foreign_key="user.id", ondelete="CASCADE")

class AuthToken(BaseModel, OAuth2TokenMixin, table=True):
    user_id: UUID = Field(foreign_key="user.id", ondelete="CASCADE")