# -*- coding: utf-8 -*-
##############################################################################
#
#    Author: Joel Grand-Guillaume
#    Copyright 2011-2012 Camptocamp SA
#
#    This program 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.
#
#    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################

from osv import fields, osv
from tools.translate import _
from account_statement_import.file_parser.parser import FileParser
import datetime
import netsvc
logger = netsvc.Logger()


class AccountSatement(osv.osv):
    """Override account bank statement to remove the period on it
    and compute it for each line."""

    _inherit = "account.bank.statement"
    
    _columns = {
        'period_id': fields.many2one('account.period', 'Period', required=False, readonly=True),
    }

    _defaults = {
        'period_id': lambda *a: False,
    }
   
    def _get_period(self, cursor, uid, date, context=None):
        '''
        Find matching period for date, used in thestatement line creation.
        '''
        period_obj = self.pool.get('account.period')
        periods = period_obj.find(cursor, uid, dt=date, context=context)
        return periods and periods[0] or False
        
    def _check_company_id(self, cr, uid, ids, context=None):
        """
        Adapt this constraint method from the account module to reflect the
        move of period_id to the statement line
        """
        for statement in self.browse(cr, uid, ids, context=context):
            if (statement.period_id and
                statement.company_id.id != statement.period_id.company_id.id):
                return False
            for line in statement.line_ids:
                if (line.period_id and
                    statement.company_id.id != line.period_id.company_id.id):
                    return False
        return True

    # Redefine the constraint, or it still refer to the original method
    _constraints = [
        (_check_company_id, 'The journal and period chosen have to belong to the same company.', ['journal_id','period_id']),
    ]
    
    def create_move_from_st_line(self, cr, uid, st_line_id, company_currency_id, st_line_number, context=None):
        """Override a large portion of the code to compute the periode for each line instead of
        taking the period of the whole statement.
        Remove the entry posting on generated account moves."""
        if context is None:
            context = {}
        res_currency_obj = self.pool.get('res.currency')
        account_move_obj = self.pool.get('account.move')
        account_move_line_obj = self.pool.get('account.move.line')
        account_bank_statement_line_obj = self.pool.get('account.bank.statement.line')
        st_line = account_bank_statement_line_obj.browse(cr, uid, st_line_id, context=context)
        st = st_line.statement_id

        context.update({'date': st_line.date})
        ctx = context.copy()                        # Chg
        ctx['company_id'] = st_line.company_id.id   # Chg
        period_id = self._get_period(               # Chg
            cr, uid, st_line.date, context=ctx)  
            
        move_id = account_move_obj.create(cr, uid, {
            'journal_id': st.journal_id.id,
            'period_id': period_id,                 # Chg
            'date': st_line.date,
            'name': st_line_number,
            'ref': st_line.ref,
        }, context=context)
        account_bank_statement_line_obj.write(cr, uid, [st_line.id], {
            'move_ids': [(4, move_id, False)]
        })

        torec = []
        if st_line.amount >= 0:
            account_id = st.journal_id.default_credit_account_id.id
        else:
            account_id = st.journal_id.default_debit_account_id.id

        acc_cur = ((st_line.amount<=0) and st.journal_id.default_debit_account_id) or st_line.account_id
        context.update({
                'res.currency.compute.account': acc_cur,
            })
        amount = res_currency_obj.compute(cr, uid, st.currency.id,
                company_currency_id, st_line.amount, context=context)

        val = {
            'name': st_line.name,
            'date': st_line.date,
            'ref': st_line.ref,
            'move_id': move_id,
            'partner_id': ((st_line.partner_id) and st_line.partner_id.id) or False,
            'account_id': (st_line.account_id) and st_line.account_id.id,
            'credit': ((amount>0) and amount) or 0.0,
            'debit': ((amount<0) and -amount) or 0.0,
            'statement_id': st.id,
            'journal_id': st.journal_id.id,
            'period_id': period_id,                 #Chg
            'currency_id': st.currency.id,
            'analytic_account_id': st_line.analytic_account_id and st_line.analytic_account_id.id or False
        }

        if st.currency.id <> company_currency_id:
            amount_cur = res_currency_obj.compute(cr, uid, company_currency_id,
                        st.currency.id, amount, context=context)
            val['amount_currency'] = -amount_cur

        if st_line.account_id and st_line.account_id.currency_id and st_line.account_id.currency_id.id <> company_currency_id:
            val['currency_id'] = st_line.account_id.currency_id.id
            amount_cur = res_currency_obj.compute(cr, uid, company_currency_id,
                    st_line.account_id.currency_id.id, amount, context=context)
            val['amount_currency'] = -amount_cur

        move_line_id = account_move_line_obj.create(cr, uid, val, context=context)
        torec.append(move_line_id)

        # Fill the secondary amount/currency
        # if currency is not the same than the company
        amount_currency = False
        currency_id = False
        if st.currency.id <> company_currency_id:
            amount_currency = st_line.amount
            currency_id = st.currency.id
        account_move_line_obj.create(cr, uid, {
            'name': st_line.name,
            'date': st_line.date,
            'ref': st_line.ref,
            'move_id': move_id,
            'partner_id': ((st_line.partner_id) and st_line.partner_id.id) or False,
            'account_id': account_id,
            'credit': ((amount < 0) and -amount) or 0.0,
            'debit': ((amount > 0) and amount) or 0.0,
            'statement_id': st.id,
            'journal_id': st.journal_id.id,
            'period_id': period_id,                 #Chg
            'amount_currency': amount_currency,
            'currency_id': currency_id,
            }, context=context)

        for line in account_move_line_obj.browse(cr, uid, [x.id for x in
                account_move_obj.browse(cr, uid, move_id,
                    context=context).line_id],
                context=context):
            if line.state <> 'valid':
                raise osv.except_osv(_('Error !'),
                        _('Journal item "%s" is not valid.') % line.name)

        # Bank statements will not consider boolean on journal entry_posted
        account_move_obj.post(cr, uid, [move_id], context=context)
        return move_id

    def _get_st_number_period(self, cr, uid, date, journal_sequence_id):
        """Retrieve the name of bank statement from sequence, according to the period 
        corresponding to the date passed in args"""
        year = self.pool.get('account.period').browse(cr, uid, self._get_period(cr, uid, date)).fiscalyear_id.id
        c = {'fiscalyear_id': year}
        obj_seq = self.pool.get('ir.sequence')
        if journal_sequence_id:
            st_number = obj_seq.next_by_id(cr, uid, journal_sequence_id, context=c)
        else:
            st_number = obj_seq.next_by_code(cr, uid, 'account.bank.statement', context=c)
        return st_number

    def button_confirm_bank(self, cr, uid, ids, context=None):
        """Completely override the method in order to have
           an error message which displays all the messages
           instead of having them pop one by one.
           We have to copy paste a big block of code, changing the error
           stack + managing period from date."""
        # obj_seq = self.pool.get('irerrors_stack.sequence')
        if context is None:
            context = {}
        for st in self.browse(cr, uid, ids, context=context):
            
            j_type = st.journal_id.type
            company_currency_id = st.journal_id.company_id.currency_id.id
            if not self.check_status_condition(cr, uid, st.state, journal_type=j_type):
                continue

            self.balance_check(cr, uid, st.id, journal_type=j_type, context=context)
            if (not st.journal_id.default_credit_account_id) \
                    or (not st.journal_id.default_debit_account_id):
                raise osv.except_osv(_('Configuration Error !'),
                        _('Please verify that an account is defined in the journal.'))

            if not st.name == '/':
                st_number = st.name
            else:
# Begin Changes                
                seq_id = st.journal_id.sequence_id and st.journal_id.sequence_id.id or False
                st_number = self._get_st_number_period(cr, uid, st.date, seq_id)
                # c = {'fiscalyear_id': st.period_id.fiscalyear_id.id}
                # if st.journal_id.sequence_id:
                #     st_number = obj_seq.next_by_id(cr, uid, st.journal_id.sequence_id.id, context=c)
                # else:
                #     st_number = obj_seq.next_by_code(cr, uid, 'account.bank.statement', context=c)
# End Changes 
            for line in st.move_line_ids:
                if line.state <> 'valid':
                    raise osv.except_osv(_('Error !'),
                            _('The account entries lines are not in valid state.'))
# begin changes
            errors_stack = []
            for st_line in st.line_ids:
                try:
                    if st_line.analytic_account_id:
                        if not st.journal_id.analytic_journal_id:
                            raise osv.except_osv(_('No Analytic Journal !'),
                                             _("You have to assign an analytic journal on the '%s' journal!") % (st.journal_id.name,))
                    if not st_line.amount:
                        continue
                    st_line_number = self.get_next_st_line_number(cr, uid, st_number, st_line, context)
                    self.create_move_from_st_line(cr, uid, st_line.id, company_currency_id, st_line_number, context)
                except osv.except_osv, exc:
                    msg = "Line ID %s with ref %s had following error: %s" % (st_line.id, st_line.ref, exc.value)
                    errors_stack.append(msg)
                except Exception, exc:
                    msg = "Line ID %s with ref %s had following error: %s" % (st_line.id, st_line.ref, str(exc))
                    errors_stack.append(msg)
            if errors_stack:
                msg = u"\n".join(errors_stack)
                raise osv.except_osv(_('Error'), msg)
#end changes
            self.write(cr, uid, [st.id], {
                    'name': st_number,
                    'balance_end_real': st.balance_end
            }, context=context)
            self.log(cr, uid, st.id, _('Statement %s is confirmed, journal items are created.') % (st_number,))
        return self.write(cr, uid, ids, {'state':'confirm'}, context=context)

class AccountSatementLine(osv.osv):
    '''
    Adds the period on line, matched on the date.
    '''
    _inherit = 'account.bank.statement.line'

    def _get_period(self, cursor, user, context=None):
        date = context.get('date', None)
        periods = self.pool.get('account.period').find(cursor, user, dt=date)
        return periods and periods[0] or False

    _columns = {
        'period_id': fields.many2one('account.period', 'Period', required=True),
    }

    _defaults = {
        'period_id': _get_period,
    }