from flask import redirect, render_template, url_for
from ..models import User
from ..tables import AdminUserTable, AdminUserItem
from . import main
from ..decorators import admin_required
from flask_login import current_user, login_required
from .forms import SwarmForm
from ..import swarm
from threading import Thread


@main.route('/')
def index():
    return render_template('main/index.html.j2', title='Portal')


@main.route('/about')
def about():
    return render_template('main/about.html.j2', title='About')


@main.route('/admin', methods=['GET', 'POST'])
@login_required
@admin_required
def for_admins_only():
    """
    View for admin page only accesible by admins.
    """
    users = User.query.order_by(User.username).all()
    items = [AdminUserItem(u.username, u.email, u.role_id, u.confirmed) for u in users]
    table = AdminUserTable(items)

    swarm_form = SwarmForm()
    if swarm_form.validate_on_submit():
        '''
        ' TODO: Implement a Job class. For now a dictionary representation is
        '       enough.
        '''
        job = {
            'creator': current_user.id,
            'id': '5fd40cb0cadef3ab5676c4968fc3d748',
            'requested_cpus': 2,
            'requested_memory': 2048,
            'service': 'ocr',
            'service_args': {
                'lang': 'eng'
            },
            'status': 'queued'
        }
        '''
        ' TODO: Let the scheduler run this job in the background. Using self
        '       created threads is just for testing purpose as there is no
        '       scheduler available.
        '''
        thread = Thread(target=swarm.run, args=(job,))
        thread.start()
        return redirect(url_for('main.for_admins_only'))

    return render_template('main/admin.html.j2', title='Administration tools',
                           swarm_form=swarm_form, table=table.__html__())