from flask import render_template, redirect, request, url_for, flash, session, abort, current_app
from flask_login import login_required, login_user, logout_user, current_user
from sqlalchemy import desc

from . import uinvoice
from .forms import PaymentForm

from ..email import send_email
from .. import db
from ..models import User, Transaction

@uinvoice.route('/transactions', methods=['GET'])
@login_required
def transactions():
    page = { 'title': 'Payment Transaction' }
    cuser = current_user
    transactions = Transaction.query.filter_by(user_id=cuser.pid).order_by(Transaction.date_created.desc()).limit(20)

    labelslist = ['today']
    translist = [cuser.wallet]
    prevvalue = cuser.wallet
    for tr in transactions:
        labelslist.insert(0, str(tr.date_created.strftime('%d.%m')))
        translist.insert(0, prevvalue - tr.value)
        prevvalue -= tr.value

    if len(labelslist) <= 1:
        labelslist.insert(0, 'before')
        translist.insert(0, 0)

    #current_app.logger.info('[{}] transactions: {} {} '.format(cuser.email, translist, labelslist))
    return render_template('uinvoice/transactions.html', transactions=transactions, translist=translist, labelslist=labelslist, cuser=cuser)

@uinvoice.route('/order/<int:document_id>', methods=['GET', 'POST'])
@login_required
def order(document_id):
    page = { 'title': 'Preview ' + str(document_id) }
    order = Transaction.query.filter_by(pid=document_id).first()
    db.session.commit()
    #check if document_id is owned by you.
    try:
        if order.user_id != current_user.pid:
            print('WARNING: user {} violates order {}'.format(current_user.pid, order.pid))
            abort(404)
    except:
        abort(404)
    form = PaymentForm()
    if form.validate_on_submit():
        #TODO: contact payment processor
        send_email(current_app.config['MAIL_USERNAME'], current_user.email + ' plati ' + str(order.units * order.unitvalue) + ' v koshnicata.', 'uinvoice/email/adm_payment', user=current_user, order=order )
        order.paid = True
        return redirect(url_for('uinvoice.documents'))
    #except:
    #    abort(404)

    return render_template('uinvoice/invoice.html', page=page, form=form, document=invoice, document_id=document_id)