from __future__ import annotations

from flask import g
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy.sql.schema import ForeignKey, UniqueConstraint
from sqlalchemy.sql.sqltypes import CHAR, Integer, String

from files.classes.base import Base
from files.helpers.config.const import *
from files.helpers.lazy import lazy

from .comment import Comment
from .submission import Submission


class OauthApp(Base):

	__tablename__ = "oauth_apps"
	__table_args__ = (
		UniqueConstraint('client_id', name='unique_id'),
	)

	id: Mapped[int] = mapped_column(Integer, primary_key=True)
	client_id: Mapped[str | None] = mapped_column(CHAR(length=64))
	app_name: Mapped[str] = mapped_column(String(length=50), nullable=False)
	redirect_uri: Mapped[str] = mapped_column(String(length=4096), nullable=False)
	description: Mapped[str] = mapped_column(String(length=256), nullable=False)
	author_id: Mapped[str] = mapped_column(Integer, ForeignKey("users.id"), nullable=False)

	author = relationship("User", viewonly=True)

	def __repr__(self): 
		return f"<{self.__class__.__name__}(id={self.id})>"

	@property
	@lazy
	def permalink(self): return f"/admin/app/{self.id}"

	@lazy
	def idlist(self, page=1):
		posts = g.db.query(Submission.id).filter_by(app_id=self.id)
		posts=posts.order_by(Submission.created_utc.desc())
		posts=posts.offset(100*(page-1)).limit(101)
		return [x[0] for x in posts.all()]

	@lazy
	def comments_idlist(self, page=1):
		posts = g.db.query(Comment.id).filter_by(app_id=self.id)
		posts=posts.order_by(Comment.created_utc.desc())
		posts=posts.offset(100*(page-1)).limit(101)
		return [x[0] for x in posts.all()]


class ClientAuth(Base):
	__tablename__ = "client_auths"
	__table_args__ = (
		UniqueConstraint('access_token', name='unique_access'),
	)

	user_id: Mapped[int] = mapped_column(Integer, ForeignKey("users.id"), primary_key=True)
	oauth_client: Mapped[int] = mapped_column(Integer, ForeignKey("oauth_apps.id"), primary_key=True)
	access_token: Mapped[str] = mapped_column(CHAR(128), nullable=False)
	
	user = relationship("User", viewonly=True)
	application = relationship("OauthApp", viewonly=True)