from flask_sqlalchemy import SQLAlchemy
from sqlalchemy.orm import relationship

db = SQLAlchemy()


#
# Categorized projects
#

class Project(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String)
    labels = relationship("ProjectLabel", back_populates="project")


class Category(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String)
    labels = relationship("Label", back_populates="category")
    projects = relationship("ProjectLabel", back_populates="category")


class Label(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String, unique=True)
    category_id = db.Column(db.Integer, db.ForeignKey('category.id'))
    category = relationship("Category", back_populates="labels")
    projects = relationship("ProjectLabel", back_populates="label")


class ProjectLabel(db.Model):
    project_id = db.Column(db.Integer, db.ForeignKey('project.id'), primary_key=True)
    category_id = db.Column(db.Integer, db.ForeignKey('category.id'), primary_key=True)
    label_id = db.Column(db.Integer, db.ForeignKey('label.id'))

    project = relationship("Project", back_populates="labels")
    category = relationship("Category", back_populates="projects")
    label = relationship("Label", back_populates="projects")


#
# Agents
#

class AgentBap(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(16))
    agents = relationship("Agent", back_populates="bap")


class AgentGrade(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(16))
    agents = relationship("Agent", back_populates="grade")


class AgentStatus(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(16))
    agents = relationship("Agent", back_populates="status")


class Company(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(16))
    agents = relationship("Agent", back_populates="company")


class Agent(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    firstname = db.Column(db.String(100))
    secondname = db.Column(db.String(100))
    virtual = db.Column(db.Integer)  # integer boolean
    permanent = db.Column(db.Integer)  # integer boolean
    company_id = db.Column(db.Integer, db.ForeignKey('company.id'))
    grade_id = db.Column(db.Integer, db.ForeignKey('agent_grade.id'))
    status_id = db.Column(db.Integer, db.ForeignKey('agent_status.id'))
    bap_id = db.Column(db.Integer, db.ForeignKey('agent_bap.id'))
    grade = relationship("AgentGrade", back_populates="agents")
    bap = relationship("AgentBap", back_populates="agents")
    status = relationship("AgentStatus", back_populates="agents")
    company = relationship("Company", back_populates="agents")


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 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)