from datetime import datetime
from email.policy import default
import time
import openai
import sqlalchemy
from sqlalchemy.orm import declarative_base, Session
from sqlalchemy import Column, DateTime, String, ForeignKey, Integer, Boolean, Table, and_, or_

Base = declarative_base()

class User(Base):
    __tablename__ = "user"

    id = Column(Integer, primary_key = True)
    number_of_comments = Column(Integer, default = 0)

    def get_user(user_id : int, session : Session):
        stmt = sqlalchemy.select(User).where(User.id == user_id)
        user = session.execute(stmt).scalar_one_or_none()
        if (user == None):
            user = User(id = user_id, number_of_comments = 0)
            session.add(user)
        return user

    def increase_number_of_comments(user_id : int, session : Session):
        User.get_user(user_id, session).number_of_comments+=1
    
    def get_number_of_comments(user_id : int, session : Session) -> int:
        return User.get_user(user_id, session).number_of_comments
    
    def reset_number_of_comments(user_id : int, session : Session):
        User.get_user(user_id, session).number_of_comments = 0
    
    def reset_all_comments(session : Session):
        stmt = sqlalchemy.select(User)
        all_comments = session.execute(stmt).scalars().fetchall()

        for comment in all_comments:
            comment.number_of_comments = 0
        
        session.flush()
        session.commit()

class Comment(Base):
    __tablename__ = "comment"

    id = Column(Integer, primary_key = True)
    user_comment_id = Column(Integer)
    bbbb_comment_id = Column(Integer)

    def get_user_comment(user_comment_id:int, session : Session):
        stmt = sqlalchemy.select(Comment).where(Comment.user_comment_id == user_comment_id)
        comments = session.execute(stmt).scalars().fetchall()

        if len(comments) == 0:
            return None
        else:
            return comments[0]
    
    def get_bbbb_comment(bbbb_comment_id:int, session : Session):
        stmt = sqlalchemy.select(Comment).where(Comment.bbbb_comment_id == bbbb_comment_id)
        comments = session.execute(stmt).scalars().fetchall()

        if len(comments) == 0:
            return None
        else:
            return comments[0]

    def get_comment(comment_id : int, session : Session):
        user_comment = Comment.get_user_comment(comment_id, session)
        if (user_comment is not None):
            return user_comment
        else:
            return Comment.get_bbbb_comment(comment_id, session)

    def has_replied_to_comment(comment_id : int, session : Session):
        return Comment.get_comment(comment_id, session) == None
    
    def create_new_comment(user_comment_id : int, bbbb_comment_id : int, session : Session):
        comment = Comment(user_comment_id = user_comment_id, bbbb_comment_id = bbbb_comment_id)
        session.add(comment)

class Post(Base):
    __tablename__ = "post"

    id = Column(Integer, primary_key = True)
    has_replied = Column(Boolean, default = False)
    replies_to_post = Column(Integer, default = 0)

    def get_post(post_id : int, session : Session):
        stmt = sqlalchemy.select(Post).where(Post.id == post_id)
        post = session.execute(stmt).scalar_one_or_none()
        if (post == None):
            post = Post(id = post_id)
            session.add(post)
        return post
    
    def has_replied_to_post(post_id : int, session : Session):
        return Post.get_post(post_id, session).has_replied
    
    def increment_replies(post_id : int, session : Session):
        Post.get_post(post_id, session).replies_to_post += 1
    
    def get_number_of_replies(post_id : int, session : Session):
        replies = Post.get_post(post_id, session).replies_to_post
        if replies == None:
            replies = 0
        
        return replies
    
    def register_post_reply(post_id : int, session : Session):
        Post.get_post(post_id, session).has_replied = True