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

# Copyright(C) 2010-2012 Romain Bignon
#
# 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 datetime import date, datetime

from .base import CapBaseObject, Field, StringField, DateField, FloatField, IntField
from .collection import ICapCollection


__all__ = ['AccountNotFound', 'TransferError', 'Recipient', 'Account', 'Transaction', 'Transfer', 'ICapBank']


class AccountNotFound(Exception):
    """
    Raised when an account is not found.
    """

    def __init__(self, msg='Account not found'):
        Exception.__init__(self, msg)

class TransferError(Exception):
    """
    A transfer has failed.
    """

class Recipient(CapBaseObject):
    """
    Recipient of a transfer.
    """

    label = StringField('Name')

    def __init__(self):
        CapBaseObject.__init__(self, 0)

class Account(Recipient):
    """
    Bank account.

    It is a child class of :class:`Recipient`, because an account can be
    a recipient of a transfer.
    """
    TYPE_UNKNOWN          = 0
    TYPE_CHECKING         = 1  # Transaction, everyday transactions
    TYPE_SAVINGS          = 2  # Savings/Deposit, can be used for everyday banking
    TYPE_DEPOSIT          = 3  # Term or Fixed Deposit, has time/amount constraints
    TYPE_LOAN             = 4
    TYPE_MARKET           = 5  # Stock market or other variable investments
    TYPE_JOINT            = 6  # Joint account

    type =      IntField('Type of account', default=TYPE_UNKNOWN)
    balance =   FloatField('Balance on this bank account')
    coming =    FloatField('Coming balance')

    def __repr__(self):
        return u"<Account id=%r label=%r>" % (self.id, self.label)


class Transaction(CapBaseObject):
    """
    Bank transaction.
    """
    TYPE_UNKNOWN      = 0
    TYPE_TRANSFER     = 1
    TYPE_ORDER        = 2
    TYPE_CHECK        = 3
    TYPE_DEPOSIT      = 4
    TYPE_PAYBACK      = 5
    TYPE_WITHDRAWAL   = 6
    TYPE_CARD         = 7
    TYPE_LOAN_PAYMENT = 8
    TYPE_BANK         = 9

    date =      DateField('Debit date')
    rdate =     DateField('Real date, when the payment has been made')
    type =      IntField('Type of transaction, use TYPE_* constants', default=TYPE_UNKNOWN)
    raw =       StringField('Raw label of the transaction')
    category =  StringField('Category of transaction')
    label =     StringField('Pretty label')
    amount =    FloatField('Amount of transaction')

    def __repr__(self):
        return "<Transaction date='%s' label='%s' amount=%s>" % (self.date,
            self.label, self.amount)

class Transfer(CapBaseObject):
    """
    Transfer from an account to a recipient.
    """

    amount =    FloatField('Amount to transfer')
    date =      Field('Date of transfer', basestring, date, datetime)
    origin =    Field('Origin of transfer', int, long, basestring)
    recipient = Field('Recipient', int, long, basestring)

class ICapBank(ICapCollection):
    """
    Capability of bank websites to see accounts and transactions.
    """
    def iter_resources(self, objs, split_path):
        """
        Iter resources.

        Default implementation of this method is to return on top-level
        all accounts (by calling :func:`iter_accounts`).

        :param objs: type of objects to get
        :type objs: tuple[:class:`CapBaseObject`]
        :param split_path: path to discover
        :type split_path: :class:`list`
        :rtype: iter[:class:`BaseCapObject`]
        """
        if Account in objs:
            self._restrict_level(split_path)

            return self.iter_accounts()

    def iter_accounts(self):
        """
        Iter accounts.

        :rtype: iter[:class:`Account`]
        """
        raise NotImplementedError()

    def get_account(self, id):
        """
        Get an account from its ID.

        :param id: ID of the account
        :type id: :class:`str`
        :rtype: :class:`Account`
        :raises: :class:`AccountNotFound`
        """
        raise NotImplementedError()

    def iter_history(self, account):
        """
        Iter history of transactions on a specific account.

        :param account: account to get history
        :type account: :class:`Account`
        :rtype: iter[:class:`Transaction`]
        :raises: :class:`AccountNotFound`
        """
        raise NotImplementedError()

    def iter_coming(self, account):
        """
        Iter coming transactions on a specific account.

        :param account: account to get coming transactions
        :type account: :class:`Account`
        :rtype: iter[:class:`Transaction`]
        :raises: :class:`AccountNotFound`
        """
        raise NotImplementedError()

    def iter_transfer_recipients(self, account):
        """
        Iter recipients availables for a transfer from a specific account.

        :param account: account which initiate the transfer
        :type account: :class:`Account`
        :rtype: iter[:class:`Recipient`]
        :raises: :class:`AccountNotFound`
        """
        raise NotImplementedError()

    def transfer(self, account, recipient, amount, reason=None):
        """
        Make a transfer from an account to a recipient.

        :param account: account to take money
        :type account: :class:`Account`
        :param recipient: account to send money
        :type recipient: :class:`Recipient`
        :param amount: amount
        :type amount: :class:`float`
        :param reason: reason of transfer
        :type reason: :class:`unicode`
        :rtype: :class:`Transfer`
        :raises: :class:`AccountNotFound`, :class:`TransferError`
        """
        raise NotImplementedError()