from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()


class Agent(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    firstname = db.Column(db.String(100))
    secondname = db.Column(db.String(100))


class Project(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), unique=True)


class Service(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), unique=True)
    abbr = db.Column(db.String(50), unique=True)


class Function(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), unique=True)


class Capacity(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), unique=True)


class Period(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), unique=True)
    num_months = db.Column(db.Integer)


class Charge(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    agent_id = db.Column(db.Integer, db.ForeignKey('agent.id'))
    project_id = db.Column(db.Integer, db.ForeignKey('project.id'))
    service_id = db.Column(db.Integer, db.ForeignKey('service.id'))
    capacity_id = db.Column(db.Integer, db.ForeignKey('capacity.id'))
    period_id = db.Column(db.Integer, db.ForeignKey('period.id'))
    charge_rate = db.Column(db.Integer)