from flask_login import UserMixin
from werkzeug.security import generate_password_hash, check_password_hash
from extensions import db
from datetime import datetime


class User(UserMixin, db.Model):
    __tablename__ = 'users'
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(50), unique=True, nullable=False)
    email = db.Column(db.String(100), unique=True, nullable=False)
    password_hash = db.Column(db.String(200), nullable=False)
    is_admin = db.Column(db.Boolean, default=False)
    created_at = db.Column(db.DateTime, default=db.func.current_timestamp())
    chats = db.relationship('Chat', backref='user', lazy=True)
    reports = db.relationship('AnalysisReport', backref='user', lazy=True)
    avatar = db.Column(db.String(128), default='default.png')

    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 Chat(db.Model):
    __tablename__ = 'chats'
    chat_id = db.Column(db.String(36), primary_key=True)
    user_id = db.Column(db.Integer, db.ForeignKey('users.id'))
    created_at = db.Column(db.DateTime, default=db.func.current_timestamp())
    title = db.Column(db.String(100))
    messages = db.relationship('Message', backref='chat', lazy=True)


class Message(db.Model):
    __tablename__ = 'messages'
    id = db.Column(db.Integer, primary_key=True)
    chat_id = db.Column(db.String(36), db.ForeignKey('chats.chat_id'))
    sender = db.Column(db.String(10))
    content = db.Column(db.Text)
    timestamp = db.Column(db.DateTime, default=db.func.current_timestamp())


class AnalysisReport(db.Model):
    __tablename__ = 'analysis_reports'
    id = db.Column(db.Integer, primary_key=True)
    user_id = db.Column(db.Integer, db.ForeignKey('users.id'))
    content = db.Column(db.Text)
    emotion = db.Column(db.String(50))
    confidence = db.Column(db.Float)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)