from flask import url_for, redirect, render_template, request, jsonify
from flask_security import login_required
from flask_security.core import current_user
from sqlalchemy.exc import IntegrityError
import json

from ..entities import Vehicle, Consumable
from ..forms import EditVehicleForm, DeleteVehicleForm, DeleteAccountForm
from ..tools import db_log_update, db_log_delete, db_log_add
from .. import app, db, user_datastore


@app.route('/account', methods=['GET'])
@login_required
def get_account_page():
    stations = [x.as_dict() for x in current_user.favourite_filling_stations]
    for station in stations:
        station['state'] = 'favourite'
    return render_template('account.html',
                           map_pos=(current_user.home_lat, current_user.home_long, current_user.home_zoom),
                           fs=json.dumps(stations))


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

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

    form = EditVehicleForm()
    form.consumables.choices = [(g.id, g.name) for g in Consumable.query.all()]

    if not form.consumables.data:
        form.consumables.default = [g.id for g in vehicle.consumables]

    if form.name.data is not None:
        form.name.default = form.name.data

    if form.validate_on_submit():
        vehicle.name = form.name.data
        # we cannot delete consumables where there are pitstops for => report error
        vehicle.consumables = []
        for consumable_id in form.consumables.data:
            consumable = Consumable.query.get(consumable_id)
            if consumable is not None:
                vehicle.consumables.append(consumable)
        try:
            db.session.commit()
            db_log_update(vehicle)
        except IntegrityError:
            db.session.rollback()
            form.name.errors.append('"%s" is not unique.' % (form.name.data))
            return render_template('editVehicleForm.html', form=form)
        return redirect(url_for('get_account_page'))

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


@app.route('/account/vehicle/delete/<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'))

    if len(current_user.vehicles) == 1:
        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/vehicle/create', methods=['GET', 'POST'])
@login_required
def create_vehicle():
    form = EditVehicleForm()
    form.consumables.choices = [(g.id, g.name) for g in Consumable.query.all()]

    if form.name.data is not None:
        form.name.default = form.name.data

    if form.consumables.data:
        form.consumables.default = form.consumables.data
    else:
        form.consumables.default = []

    if form.validate_on_submit():
        if len(form.consumables.data) == 0:
            form.consumables.errors.append('At least one consumable must be selected.')
            return render_template('createVehicleForm.html', form=form)

        vehicle_name = form.name.data
        new_vehicle = Vehicle(vehicle_name)
        for consumable_id in form.consumables.data:
            consumable = Consumable.query.get(consumable_id)
            if consumable is not None:
                new_vehicle.consumables.append(consumable)
        db.session.add(new_vehicle)
        current_user.vehicles.append(new_vehicle)
        try:
            db.session.commit()
            db_log_add(new_vehicle)
        except IntegrityError:
            db.session.rollback()
            form.name.errors.append('"%s" is not unique.' % (form.name.data))
            return render_template('createVehicleForm.html', form=form)
        return redirect(url_for('get_account_page'))

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


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

    if form.validate_on_submit():
        user_datastore.delete_user(current_user)
        db.session.commit()
        return redirect(url_for('index'))

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


@app.route('/account/home', methods=['GET'])
@login_required
def get_users_home():
    return jsonify(
        {'lat': float(current_user.home_lat), 'long': float(current_user.home_long), 'zoom': current_user.home_zoom})


@app.route('/account/home', methods=['POST'])
@login_required
def set_users_home():
    current_user.home_lat = request.json['lat']
    current_user.home_long = request.json['long']
    current_user.home_zoom = request.json['zoom']
    db.session.commit()
    return jsonify({})