from sqlalchemy import create_engine, Column, Integer, String, Boolean, Float, DateTime, ForeignKey, Text
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker, relationship
from datetime import datetime
import uuid
from .config import settings

engine = create_engine(settings.DATABASE_URL, connect_args={"check_same_thread": False})
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
Base = declarative_base()

def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()

class User(Base):
    __tablename__ = "users"
    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    email = Column(String, unique=True, index=True)
    username = Column(String, unique=True, index=True)
    hashed_password = Column(String)
    full_name = Column(String)
    avatar = Column(String, nullable=True)
    bio = Column(Text, nullable=True)
    plan = Column(String, default="Free")
    created_at = Column(DateTime, default=datetime.utcnow)
    
    songs = relationship("Song", back_populates="owner")
    playlists = relationship("Playlist", back_populates="owner")

class Song(Base):
    __tablename__ = "songs"
    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    title = Column(String)
    prompt = Column(Text)
    lyrics = Column(Text, nullable=True)
    genre = Column(String)
    mood = Column(String, nullable=True)
    duration = Column(String)
    model = Column(String)
    audio_url = Column(String)
    cover_url = Column(String)
    plays = Column(Integer, default=0)
    likes_count = Column(Integer, default=0)
    created_at = Column(DateTime, default=datetime.utcnow)
    owner_id = Column(String, ForeignKey("users.id"))
    
    owner = relationship("User", back_populates="songs")

class Playlist(Base):
    __tablename__ = "playlists"
    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    name = Column(String)
    description = Column(Text, nullable=True)
    cover_url = Column(String, nullable=True)
    is_public = Column(Boolean, default=True)
    created_at = Column(DateTime, default=datetime.utcnow)
    owner_id = Column(String, ForeignKey("users.id"))
    
    owner = relationship("User", back_populates="playlists")

def init_db():
    Base.metadata.create_all(bind=engine)