# -*- coding: utf-8 -*-
'''
Created on 09 Octobre 2016

@author: Thibault Francois (thibault@françois.be)
'''

from StringIO import StringIO
import csv
import datetime
from openerp import models, _

ACCOUNT = "Compte donneur d'ordre"
CURRENCY = "Devise"
DATE = "Date"
AMOUNT = "Montant"
COUNTERPART_NUMBER = "Compte contrepartie"
COUNTERPART_NAME = "Contrepartie"
COMMUNICATION = "Communication"
TRANSACTION_TYPE = "Type d'op\xc3\xa9ration"

class CodaBankStatementImport(models.TransientModel):
    _inherit = 'account.bank.statement.import'

    _date_format = "%d/%m/%Y"

    _decimal_sep = "."
    _csv_delimiter = ";"
    _csv_quote = '"'
    
    _header = ['Date', 'Montant', 'Devise', 'Contrepartie', 'Compte contrepartie', "Type d'op\xc3\xa9ration", 'Communication', "Compte donneur d'ordre"]


    def _generate_note_crelan(self, move):
        notes = []
        notes.append("%s: %s" % (_('Counter Party Name'), move[COUNTERPART_NAME]))
        notes.append("%s: %s" % (_('Counter Party Account'), move[COUNTERPART_NUMBER]))
        notes.append("%s: %s" % (_('Communication'), move[COMMUNICATION]))
        return '\n'.join(notes)

    def _get_move_value_crelan(self, move, sequence):
        move_data = {
            'name': move[TRANSACTION_TYPE] + ": " + move[COMMUNICATION],
            'note': self._generate_note_crelan(move),
            'date': self._to_iso_date(move[DATE]),
            'amount': float(move[AMOUNT]),
            'account_number': move[COUNTERPART_NUMBER], #ok
            'partner_name': move[COUNTERPART_NAME], #ok
            'ref': move[DATE] + '-' + move[AMOUNT] + '-' + move[COUNTERPART_NUMBER] + '-' + move[COUNTERPART_NAME],
            'sequence': sequence, #ok
            'unique_import_id' : move[DATE] + '-' + move[AMOUNT] + '-' + move[COUNTERPART_NUMBER] + '-' + move[COUNTERPART_NAME]
        }
        return move_data

    def _get_statement_data_crelan(self, balance_start, balance_end, begin_date, end_date):
        statement_data = {
            'name' : _("Bank Statement from %s to %s")  % (begin_date, end_date),
            'date' : self._to_iso_date(end_date),
            'balance_start': balance_start, #ok
            'balance_end_real' : balance_end, #ok
            'transactions' : []
        }
        return statement_data
    
    def _get_acc_number_crelan(self, acc_number):
        #Check if we match the exact acc_number or the end of an acc number
        journal = self.env['account.journal'].search([('bank_acc_number', '=like', '%' + acc_number)])
        if not journal or len(journal) > 1: #if not found or ambiguious 
            return acc_number
        
        return journal.bank_acc_number

    def _get_acc_balance_crelan(self, acc_number):
        if not self.init_balance == None:
            return self.init_balance
        print "compute balance"

        journal = self.env['account.journal'].search([('bank_acc_number', '=like', '%' + acc_number)])
        if not journal or len(journal) > 1: #if not found or ambiguious 
            self.init_balance = 0.0
        else:
            self.init_balance = float(journal.get_journal_dashboard_datas()['last_balance'][:-1].strip().replace(',', ''))
        
        return self.init_balance

    def _to_iso_date(self, orig_date):
        date_obj = datetime.datetime.strptime(orig_date, self._date_format)  
        return date_obj.strftime('%Y-%m-%d')

    def _parse_file(self, data_file):

        try:
            csv_file = StringIO(data_file)
            data = csv.DictReader(csv_file, delimiter=self._csv_delimiter, quotechar=self._csv_quote)
            if not data.fieldnames == self._header:
                raise ValueError()
        except ValueError:
            return super(CodaBankStatementImport, self)._parse_file(data_file)

        currency_code = False
        account_number = False
        self.init_balance = None
        begin_date = False
        end_date = False

        transactions = []
        i = 1
        sum_transaction  = 0
        for statement in data:
            begin_date = begin_date or statement[DATE]
            end_date = statement[DATE]
            account_number =  statement[ACCOUNT]
            balance = self._get_acc_balance_crelan(account_number)
            currency_code = statement[CURRENCY]
            transactions.append(self._get_move_value_crelan(statement, i))
            sum_transaction += float(statement[AMOUNT])
            i += 1
        stmt = self._get_statement_data_crelan(balance, balance+ sum_transaction, begin_date, end_date)
        stmt['transactions'] = transactions
        return currency_code, self._get_acc_number_crelan(account_number), [stmt]