from . import db
from werkzeug.security import generate_password_hash, check_password_hash
import uuid
from sqlalchemy.sql import func
import datetime
from datetime import timezone, timedelta

class User(db.Model):
    id = db.Column(db.String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    username = db.Column(db.String(80), unique=True, nullable=False)
    nickname = db.Column(db.String(80), nullable=True)
    
    password_hash = db.Column(db.String(256), nullable=False)

    diaries = db.relationship('Diary', backref='author', lazy=True, cascade="all, delete-orphan")

    def set_password(self, password):
        self.password_hash = generate_password_hash(password)

    def check_password(self, password):
        return check_password_hash(self.password_hash, password)
    
class Diary(db.Model):
    id = db.Column(db.String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    user_id = db.Column(db.String(36), db.ForeignKey('user.id'), nullable=False)
    content = db.Column(db.Text, nullable=False)
    emotion = db.Column(db.String(20), nullable=False)
    recommendation = db.Column(db.Text, nullable=True)
    created_at = db.Column(db.DateTime(timezone=True), default=func.now())

    __table_args__ = (db.Index('idx_diary_user_id_created_at', "user_id", "created_at"),)