# -*- coding: utf-8 -*-
"""
Models for lecture recorder
"""
import json

from sqlalchemy import MetaData

from backend import db, app, login_manager
import re
from sqlalchemy import or_
from datetime import datetime, timedelta

from backend.models.virtual_command_model import virtual_command_recorder_command_table

metadata = MetaData()

# This is the association table for the many-to-many relationship between
# groups and permissions.
recorder_model_recorder_command_table = db.Table('recorder_model_recorder_command',
                           db.Column('recorder_model_id', db.Integer,
                                  db.ForeignKey('recorder_model.id',
                                             onupdate="CASCADE",
                                             ondelete="CASCADE"),
                                  primary_key=True),
                           db.Column('recorder_command_id', db.Integer,
                                  db.ForeignKey('recorder_command.id',
                                             onupdate="CASCADE",
                                             ondelete="CASCADE"),
                                  primary_key=True))


class RecorderModel(db.Model):
    id = db.Column(db.Integer, autoincrement=True, primary_key=True)
    model_name = db.Column(db.Unicode(63), unique=True, nullable=False)
    model_checksum = db.Column(db.String(63), unique=True, nullable=True)
    notes = db.Column(db.Unicode(255), unique=False, nullable=True, default=None)
    recorder_commands = db.relationship('RecorderCommand', secondary=recorder_model_recorder_command_table,
                                        back_populates='recorder_models')
    recorders = db.relationship('Recorder', back_populates='recorder_model')


class Recorder(db.Model):
    id = db.Column(db.Integer, autoincrement=True, primary_key=True)
    created_at = db.Column(db.DateTime, nullable=False, default=datetime.utcnow())
    name = db.Column(db.Unicode(63), unique=True, nullable=False)
    description = db.Column(db.Unicode(255), unique=False, nullable=True, default="")
    room_id = db.Column(db.Integer, db.ForeignKey('room.id'))
    room = db.relationship('Room', uselist=False, back_populates='recorder')  # one-to-one relation (uselist=False)
    ip = db.Column(db.String(15), unique=True, nullable=True, default=None)
    network_name = db.Column(db.String(127), unique=True, nullable=True, default=None)
    telnet_port = db.Column(db.Integer, unique=False, nullable=False, default=23)
    ssh_port = db.Column(db.Integer, unique=False, nullable=False, default=22)
    recorder_model_id = db.Column(db.Integer, db.ForeignKey('recorder_model.id'))
    recorder_model = db.relationship('RecorderModel', back_populates='recorders')
    virtual_commands = db.relationship('VirtualCommand', back_populates='recorders')

    def __init__(self, **kwargs):
        super(Recorder, self).__init__(**kwargs)


    @staticmethod
    def get_by_name(name):
        """
        Find group by name
        :param name:
        :return:
        """
        return Recorder.query.filter(Recorder.name == name).first()

    @staticmethod
    def get_all():
        """
        Return all groups
        :return:
        """
        return Recorder.query.all()

    def __str__(self):
        return self.name

    def to_dict(self):
        return dict(id=self.id, name=self.name)

    def toJSON(self):
        return json.dumps(self.to_dict(), default=lambda o: o.__dict__,
                          sort_keys=True, indent=4)


class RecorderCommand(db.Model):
    """Table containing permissions associated with groups."""
    id = db.Column(db.Integer, autoincrement=True, primary_key=True)
    name = db.Column(db.Unicode(63), unique=True, nullable=False)
    description = db.Column(db.Unicode(511), nullable=True, default=None)
    parameters = db.Column(db.String(2047), nullable=True)
    recorder_models = db.relationship('RecorderModel', secondary=recorder_model_recorder_command_table,
                  back_populates='recorder_commands')

    virtual_commands = db.relationship('VirtualCommand', secondary=virtual_command_recorder_command_table,
                  back_populates='recorder_commands')