from flask_sqlalchemy import SQLAlchemy
from datetime import datetime


db = SQLAlchemy()

class CommissionPersons(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    fio = db.Column(db.String(80), unique=True, nullable=False)
    ispredsedatel = db.Column(db.Boolean, nullable=False, default=False)
    isrecenzent = db.Column(db.Boolean, nullable=False, default=False)
    issecretar = db.Column(db.Boolean, nullable=False, default=False)


class CommissionSostav(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    predsedatel = db.Column(db.String(100), nullable=False)
    uchastnik1=db.Column(db.String(100), nullable=False)
    uchastnik2=db.Column(db.String(100), nullable=False)
    uchastnik3=db.Column(db.String(100), nullable=False)
    uchastnik4=db.Column(db.String(100), nullable=False)
    secretar=db.Column(db.String(100), nullable=False)

class Rukovoditeli(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    fio = db.Column(db.String(80), nullable=False)
    canMagistr = db.Column(db.Boolean, nullable=False, default=False)
    stepen = db.Column(db.String(80), nullable=False)
    dolognost = db.Column(db.String(80), nullable=False)

class Studentus(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    fio = db.Column(db.String(80), nullable=False)
    vkrTheme = db.Column(db.String(80), nullable=False)
    rucovoditel_id = db.Column(db.Integer, db.ForeignKey('rukovoditeli.id'), nullable=False)
    konsultant_id = db.Column(db.Integer, db.ForeignKey('rukovoditeli.id'), nullable=False)
    rucovoditel = db.relationship('Rukovoditeli', foreign_keys=[rucovoditel_id],
                                  backref=db.backref('students_as_rucovoditel', lazy=True))
    konsultant = db.relationship('Rukovoditeli', foreign_keys=[konsultant_id],
                                 backref=db.backref('students_as_konsultant', lazy=True))


class CommissionZasedanie(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    data = db.Column(db.DateTime, nullable=False)
    commission_sostav_id = db.Column(db.Integer, db.ForeignKey('commission_sostav.id'), nullable=False)
    commission_sostav = db.relationship('CommissionSostav', uselist=False, backref=db.backref('zasedanie', lazy=True))
    students = db.relationship('Studentus', backref=db.backref('zasedanie', lazy=True))