from application import app
from application import db


import os
import os.path as op
import datetime

import hashlib
import time

from werkzeug import secure_filename
from sqlalchemy import event
from sqlalchemy.event import listens_for

from flask import (
    render_template, 
    jsonify, 
    redirect, 
    url_for, 
    request)

from flask.ext.sqlalchemy import SQLAlchemy


def prefix_name(obj, file_data):
    # Collect name and extension
    parts = op.splitext(file_data.filename)
    # Get current time (for unique hash)
    timestamp = str(round(time.time()))
    # Has filename only (not extension)
    file_name = secure_filename(timestamp + '%s' % parts[0])
    # Put them together
    full_name = hashlib.md5(file_name).hexdigest() + parts[1]
    return full_name


# Create directory for file fields to use
file_path = op.join(op.dirname(__file__), 'static/files',)
try:
    os.mkdir(file_path)
except OSError:
    pass


class Status(db.Model):
    id = db.Column(db.Integer, primary_key = True)
    name = db.Column(db.String(120), nullable=False)
    url = db.Column(db.String(120), nullable=False)
    description = db.Column(db.Text)

    def __str__(self):
        return self.name

class NodeType(db.Model):
    id = db.Column(db.Integer, primary_key = True)
    name = db.Column(db.String(120), nullable=False)
    description = db.Column(db.Text)
    url = db.Column(db.String(120), nullable=False)

    def __str__(self):
        return self.name


# Create Many to Many table
nodes_assets_table = db.Table('nodes_assets', db.Model.metadata,
                           db.Column('node_id', db.Integer, db.ForeignKey('node.id')),
                           db.Column('asset_id', db.Integer, db.ForeignKey('asset.id'))
                           )


class Node(db.Model):
    id = db.Column(db.Integer, primary_key = True)
    name = db.Column(db.String(120), nullable=False)
    url = db.Column(db.String(120))
    description = db.Column(db.Text)
    main_picture = db.Column(db.String(80))
    order = db.Column(db.Integer)
    creation_date = db.Column(db.DateTime(), default=datetime.datetime.now)
    edit_date = db.Column(db.DateTime())
    
    parent_id = db.Column(db.Integer, db.ForeignKey('node.id'))
    parent = db.relationship('Node', remote_side=[id]) 

    node_type_id = db.Column(db.Integer(), db.ForeignKey(NodeType.id))
    node_type = db.relationship(NodeType, backref='Node')

    status_id = db.Column(db.Integer(), db.ForeignKey(Status.id))
    status = db.relationship(Status, backref='Node')

    assets = db.relationship('Asset', secondary=nodes_assets_table)

    def __str__(self):
        return self.name



# Create Many to Many table
"""
assets_tags_table = db.Table('assets_tags', db.Model.metadata,
                           db.Column('asset_id', db.Integer, db.ForeignKey('asset.id')),
                           db.Column('tag_id', db.Integer, db.ForeignKey('tag.id'))
                           )
"""

class Asset(db.Model): 
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(120), nullable=False)
    description = db.Column(db.Text, nullable=False)
    link = db.Column(db.String(512))
    picture = db.Column(db.String(80))
    size = db.Column(db.String(7))
    format = db.Column(db.String(15))
    duration = db.Column(db.String(15))

    nodes = db.relationship('Node', secondary=nodes_assets_table)

    #tags = db.relationship('Tag', secondary=assets_tags_table)

    def __str__(self):
        return self.name

"""

class Tag(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.Unicode(64))

    def __str__(self):
        return self.name

"""