# -*- coding: utf-8 -*-

# Copyright(C) 2013      Laurent Bachelier
#
# This file is part of weboob.
#
# weboob is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# weboob is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with weboob. If not, see <http://www.gnu.org/licenses/>.

from decimal import Decimal
import re
import datetime

from weboob.tools.browser import BasePage, BrokenPageError
from weboob.capabilities.bank import Account
from weboob.tools.capabilities.bank.transactions import FrenchTransaction

__all__ = ['LoginPage', 'AccountPage']


def clean_amount(text):
    """
    >>> clean_amount('42')
    Decimal('42')
    >>> clean_amount('42,12')
    Decimal('42.12')
    >>> clean_amount('42.12')
    Decimal('42.12')
    >>> clean_amount('$42.12 USD')
    Decimal('42.12')
    >>> clean_amount('$12.442,12 USD')
    Decimal('12442.12')
    >>> clean_amount('$12,442.12 USD')
    Decimal('12442.12')
    """
    # Convert "American" UUU.CC format to "French" UUU,CC format
    if re.search(r'\d\.\d\d(?: [A-Z]+)?$', text):
        text = text.replace(',', ' ').replace('.', ',')
    return Decimal(FrenchTransaction.clean_amount(text))


class LoginPage(BasePage):
    def login(self, login, password):
        self.browser.select_form(name='login_form')
        self.browser['login_email'] = login
        self.browser['login_password'] = password
        self.browser.submit(nologin=True)


class AccountPage(BasePage):
    def get_account(self, _id):
        return self.get_accounts().get(_id)

    def get_accounts(self):
        accounts = {}
        content = self.document.xpath('//div[@id="main"]//div[@class="col first"]')[0]

        # Total currency balance.
        # If there are multiple currencies, this balance is all currencies
        # converted to the main currency.
        balance = content.xpath('.//h3/span[@class="balance"]')
        if not balance:
            balance = content.xpath('.//li[@class="balance"]//span/strong')
        balance = balance[0].text_content().strip()

        # Primary currency account
        primary_account = Account()
        primary_account.type = Account.TYPE_CHECKING
        primary_account.balance = clean_amount(balance)
        primary_account.currency = Account.get_currency(balance)
        primary_account.id = unicode(primary_account.currency)
        primary_account.label = u'%s %s*' % (self.browser.username, balance.split()[-1])
        accounts[primary_account.id] = primary_account

        # The following code will only work if the user enabled multiple currencies.
        balance = content.xpath('.//div[@class="body"]//ul/li[@class="balance"]/span')
        table = content.xpath('.//table[@id="balanceDetails"]//tbody//tr')

        # sanity check
        if bool(balance) is not bool(table):
            raise BrokenPageError('Unable to find all required multiple currency entries')

        # Primary currency balance.
        # If the user enabled multiple currencies, we get this one instead.
        # An Account object has only one currency; secondary currencies should be other accounts.
        if balance:
            balance = balance[0].text_content().strip()
            primary_account.balance = clean_amount(balance)
            # The primary currency of the "head balance" is the same; ensure we got the right one
            assert primary_account.currency == primary_account.get_currency(balance)

        for row in table:
            balance = row.xpath('.//td')[-1].text_content().strip()
            account = Account()
            account.type = Account.TYPE_CHECKING
            account.balance = clean_amount(balance)
            account.currency = Account.get_currency(balance)
            account.id = unicode(account.currency)
            account.label = u'%s %s' % (self.browser.username, balance.split()[-1])
            if account.id == primary_account.id:
                assert account.balance == primary_account.balance
                assert account.currency == primary_account.currency
            elif account.currency:
                accounts[account.id] = account

        return accounts


class DownloadHistoryPage(BasePage):
    def download(self):
        today = datetime.date.today()
        self.browser.select_form(name='form1')
        # download an entire year
        self.browser['to_c'] = str(today.year)
        self.browser['to_a'] = str(today.month)
        self.browser['to_b'] = str(today.day)
        self.browser['from_c'] = str(today.year - 1)
        self.browser['from_a'] = str(today.month)
        self.browser['from_b'] = str(today.day)

        # only "real" stuff, no cancelled payments
        self.browser['custom_file_type'] = ['comma_completed']
        self.browser['latest_completed_file_type'] = ['']

        self.browser.submit()