from datetime import date
from flask import Flask
from flask import redirect, g
from flask import render_template
from flask import url_for
from flask.ext.mail import Mail
from flask.ext.security import Security, SQLAlchemyUserDatastore, \
    UserMixin, RoleMixin, login_required, roles_required
from flask.ext.security import user_registered
from flask_security.core import current_user
from flask_sqlalchemy import SQLAlchemy
import logging

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:////data/rollerverbrauch.db'
app.config['SECURITY_PASSWORD_HASH'] = 'pbkdf2_sha512'
app.config['SECURITY_REGISTERABLE'] = True
app.config['SECURITY_CHANGEABLE'] = True
app.config['SECURITY_RECOVERABLE'] = True
app.config.from_envvar('config')
app.config.from_object(__name__)

db = SQLAlchemy(app)
mail = Mail(app)

from rollerverbrauch.tools import \
    VehicleStats, \
    db_log_add, \
    db_log_delete, \
    db_log_update

from rollerverbrauch.forms import \
    CreatePitstopForm, \
    EditVehicleForm, \
    DeleteVehicleForm, \
    SelectVehicleForm

from rollerverbrauch.entities import \
    User, \
    Role, \
    Pitstop, \
    Vehicle

# required to activate the filters
import rollerverbrauch.filters


user_datastore = SQLAlchemyUserDatastore(db, User, Role)
security = Security(app, user_datastore)


@user_registered.connect_via(app)
def user_registered_sighandler(app, user, confirm_token):
    """
    Called after a user was created
    """
    role = user_datastore.find_role('user')
    user_datastore.add_role_to_user(user, role)
    new_vehicle = Vehicle('default vehicle')
    db.session.add(new_vehicle)
    user.vehicles.append(new_vehicle)
    db.session.commit()
    db_log_add(user)
    db_log_add(new_vehicle)


@app.before_first_request
def before_first_request():
    db.create_all()
    user_datastore.find_or_create_role(name='admin', description='Role for administrators')
    user_datastore.find_or_create_role(name='user', description='Role for all users.')
    db.session.commit()


@app.before_request
def before_request():
    g.data = {}


@app.route('/')
@login_required
def index():
    return redirect(url_for('get_pit_stops'))


@app.route('/account/edit_vehicle/<int:vid>', methods=['GET', 'POST'])
@login_required
def edit_vehicle(vid):
    vehicle = Vehicle.query.filter(Vehicle.id == vid).first()
    form = EditVehicleForm()

    if form.validate_on_submit():
        vehicle.name = form.name.data
        db.session.commit()
        db_log_update(vehicle)
        return redirect(url_for('get_account_page'))

    form.name.default = vehicle.name
    form.process()
    return render_template('editVehicleForm.html', form=form)


@app.route('/account/delete_vehicle/<int:vid>', methods=['GET', 'POST'])
@login_required
def delete_vehicle(vid):
    vehicle = Vehicle.query.filter(Vehicle.id == vid).first()

    # prevent deletion of foreign vehicles
    if vehicle not in current_user.vehicles:
        return redirect(url_for('get_account_page'))

    form = DeleteVehicleForm()

    if form.validate_on_submit():
        db.session.delete(vehicle)
        db.session.commit()
        db_log_delete(vehicle)
        return redirect(url_for('get_account_page'))

    return render_template('deleteVehicleForm.html', form=form, vehicle=vehicle)


@app.route('/account/create_vehicle', methods=['GET', 'POST'])
@login_required
def create_vehicle():
    form = EditVehicleForm()

    if form.validate_on_submit():
        new_vehicle = Vehicle(form.name.data)
        db.session.add(new_vehicle)
        current_user.vehicles.append(new_vehicle)
        db.session.commit()
        db_log_add(new_vehicle)
        return redirect(url_for('get_account_page'))

    return render_template('createVehicleForm.html', form=form)


@app.route('/pitstops/select_vehicle', methods=['GET', 'POST'])
@login_required
def select_vehicle_for_new_pitstop():
    form = SelectVehicleForm()
    form.vehicle.choices = [(g.id, g.name) for g in current_user.vehicles]

    if form.validate_on_submit():
        vehicle = Vehicle.query.filter(Vehicle.id == form.vehicle.data).first()
        if vehicle not in current_user.vehicles:
            return render_template('selectVehice.html', form=form)

        return redirect(url_for('create_pit_stop_form', vid=form.vehicle.data))

    return render_template('selectVehice.html', form=form)


@app.route('/pitstops/create/<int:vid>', methods=['GET', 'POST'])
@login_required
def create_pit_stop_form(vid):
    vehicle = Vehicle.query.filter(Vehicle.id == vid).first()
    if vehicle not in current_user.vehicles:
        return redirect(url_for('select_vehicle_for_new_pitstop'))

    if len(vehicle.pitstops) > 0:
        last_pitstop = vehicle.pitstops[-1]
    else:
        last_pitstop = Pitstop(0, 0, date.today())

    form = CreatePitstopForm()
    form.set_pitstop(last_pitstop)

    if form.validate_on_submit():
        new_stop = Pitstop(form.odometer.data, form.litres.data, form.date.data)
        db.session.add(new_stop)
        vehicle.pitstops.append(new_stop)
        db.session.commit()
        db_log_add(new_stop)
        return redirect(url_for('get_pit_stops', _anchor= 'v' + str(vehicle.id)))

    form.odometer.default = last_pitstop.odometer
    form.litres.default = last_pitstop.litres
    form.date.default = date.today()
    form.process()
    return render_template('newPitStopForm.html', form=form, vehicle=vehicle)


@app.route('/pitstops', methods=['GET'])
@login_required
def get_pit_stops():
    return render_template('pitstops.html', user=current_user)


@app.route('/manual', methods=['GET'])
@login_required
def get_manual():
    return render_template('manual.html', data=g.data)


@app.route('/admin', methods=['GET'])
@roles_required('admin')
def get_admin_page():
    g.data['users'] = User.query.all()
    return render_template('admin.html', data=g.data)


@app.route('/account', methods=['GET'])
@login_required
def get_account_page():
    return render_template('account.html', data=g.data)


@app.route('/statistics', methods=['GET'])
@login_required
def get_statistics():
    stats = []
    for vehicle in current_user.vehicles:
        stats.append(VehicleStats(vehicle))
    return render_template('statistics.html', data=stats)