from sqlalchemy import Column, Integer, String, ForeignKey, DateTime, JSON, Date
from sqlalchemy.orm import relationship, declarative_base
from sqlalchemy.dialects.postgresql import JSONB
from sqlalchemy.ext.mutable import MutableDict
from sqlalchemy.dialects.postgresql import ARRAY, JSONB
from sqlalchemy.ext.mutable import MutableList
from datetime import datetime

Base = declarative_base()


class User(Base):
    __tablename__ = "users"

    id = Column(Integer, primary_key=True, index=True)
    username = Column(String, unique=True, index=True, nullable=False)
    email = Column(String, unique=True, index=True, nullable=False)
    hashed_password = Column(String, nullable=False)
    dob = Column(Date, nullable=False)
    country_of_origin = Column(String, nullable=False)

    followers = Column(MutableList.as_mutable(ARRAY(String)), default=[])
    following = Column(MutableList.as_mutable(ARRAY(String)), default=[])
    bio = Column(String, nullable=True)
    profile_picture = Column(String, nullable=True)

    blogs = relationship("Blog", back_populates="user", cascade="all, delete-orphan")


class Blog(Base):
    __tablename__ = "blogs"

    id = Column(Integer, primary_key=True, index=True)
    username = Column(String, ForeignKey("users.username", ondelete="CASCADE"), nullable=False)
    text_content = Column(String, nullable=False)
    image_url = Column(String, nullable=True)
    likes = Column(Integer, default=0)
    comments = Column(MutableDict.as_mutable(JSONB), default={})
    created_at = Column(DateTime, default=datetime.utcnow)

    user = relationship("User", back_populates="blogs")