# -*- encoding: utf-8 -*-
##############################################################################
#
# Copyright (c) 2004-2006 TINY SPRL. (http://tiny.be) All Rights Reserved.
#
# $Id: account.py 1005 2005-07-25 08:41:42Z nicoe $
#
# WARNING: This program as such is intended to be used by professional
# programmers who take the whole responsability of assessing all potential
# consequences resulting from its eventual inadequacies and bugs
# End users who are looking for a ready-to-use solution with commercial
# garantees and support are strongly adviced to contract a Free Software
# Service Company
#
# This program is Free Software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#
##############################################################################

import time
import netsvc
from osv import fields, osv
import ir
import pooler
import mx.DateTime
from mx.DateTime import RelativeDateTime

class account_invoice(osv.osv):
	def _amount_untaxed(self, cr, uid, ids, prop, unknow_none,unknow_dict):
		id_set=",".join(map(str,ids))
		cr.execute("SELECT s.id,COALESCE(SUM(l.price_unit*l.quantity*(100-l.discount))/100.0,0)::decimal(16,2) AS amount FROM account_invoice s LEFT OUTER JOIN account_invoice_line l ON (s.id=l.invoice_id) WHERE s.id IN ("+id_set+") GROUP BY s.id ")
		res=dict(cr.fetchall())
		return res

	def _amount_tax(self, cr, uid, ids, prop, unknow_none,unknow_dict):
		id_set=",".join(map(str,ids))
		cr.execute("SELECT s.id,COALESCE(SUM(l.amount),0)::decimal(16,2) AS amount FROM account_invoice s LEFT OUTER JOIN account_invoice_tax l ON (s.id=l.invoice_id) WHERE s.id IN ("+id_set+") GROUP BY s.id ")
		res=dict(cr.fetchall())
		return res

	def _amount_total(self, cr, uid, ids, prop, unknow_none,unknow_dict):
		untax = self._amount_untaxed(cr, uid, ids, prop, unknow_none,unknow_dict)
		tax = self._amount_tax(cr, uid, ids, prop, unknow_none,unknow_dict)
		res = {}
		for id in ids:
			res[id] = untax.get(id,0.0) + tax.get(id,0.0)
		return res

	def _get_journal(self, cr, uid, context):
		type_inv = context.get('type', 'out_invoice')
		type2journal = {'out_invoice': 'sale', 'in_invoice': 'purchase', 'out_refund': 'sale', 'in_refund': 'purchase'}
		cr.execute("select id from account_journal where type=%s limit 1", (type2journal.get(type_inv, 'sale'),))
		return cr.fetchone()[0]
	
	def _get_currency(self, cr, uid, context):
		user = pooler.get_pool(cr.dbname).get('res.users').browse(cr, uid, [uid])[0]
		if user.company_id:
			return user.company_id.currency_id.id
		else:
			return pooler.get_pool(cr.dbname).get('res.currency').search(cr, uid, [('rate','=',1.0)])[0]

	def _get_journal_analytic(self, cr, uid, type_inv, context={}):
		type2journal = {'out_invoice': 'sale', 'in_invoice': 'purchase', 'out_refund': 'sale', 'in_refund': 'purchase'}
		tt = type2journal.get(type_inv, 'sale')
		cr.execute("select id from account_analytic_journal where type=%s limit 1", (tt,))
		result = cr.fetchone()
		if not result:
			raise osv.except_osv('No Analytic Journal !', "You have to define an analytic journal of type '%s' !" % (tt,))
		return result[0]

	_name = "account.invoice"
	_description = 'Invoice'
	_order = "number"
	_columns = {
		'name': fields.char('Invoice Description', size=64, required=True, select=True),
		'origin': fields.char('Origin', size=64),
		'type': fields.selection([
			('out_invoice','Customer Invoice'),
			('in_invoice','Supplier Invoice'),
			('out_refund','Customer Refund'),
			('in_refund','Supplier Refund'),
		],'Type', readonly=True, states={'draft':[('readonly',False)]}, select=True),

		'number': fields.char('Invoice Number', size=32,readonly=True),  
		'reference': fields.char('Invoice Reference', size=64),
		'project_id': fields.many2one('account.analytic.account', 'Analytic Account', readonly=True, states={'draft':[('readonly',False)]}),
		'comment': fields.text('Additionnal Information'),

		'state': fields.selection([
			('draft','Draft'),
			('proforma','Pro-forma'),
			('open','Open'),
			('paid','Paid'),
			('cancel','Canceled')
		],'State', readonly=True, select=True),

		'date_invoice': fields.date('Date Invoiced', required=True, states={'open':[('readonly',True)],'close':[('readonly',True)]}),
		'date_due': fields.date('Due Date', states={'open':[('readonly',True)],'close':[('readonly',True)]}),
		'date_discount': fields.date('Discount Date', states={'open':[('readonly',True)],'close':[('readonly',True)]},
									 help='The date of the first cash discount'),		

		'partner_id': fields.many2one('res.partner', 'Partner', change_default=True, readonly=True, required=True, states={'draft':[('readonly',False)]}, relate=True),
		'partner_bank_id': fields.many2one('res.partner.bank', 'Partner bank', states={'draft':[('readonly',False)]}),
		'address_contact_id': fields.many2one('res.partner.address', 'Contact Address', readonly=True, states={'draft':[('readonly',False)]}),
		'address_invoice_id': fields.many2one('res.partner.address', 'Invoice Address', readonly=True, required=True, states={'draft':[('readonly',False)]}),

		'partner_contact': fields.char('Partner Contact', size=64),
		'partner_ref': fields.char('Partner Reference', size=64),

		'payment_term': fields.many2one('account.payment.term', 'Payment Term'),

		'period_id': fields.many2one('account.period', 'Force Period', help="Keep empty to use the period of the validation date."),

		'account_id': fields.many2one('account.account', 'Dest Account', required=True, readonly=True, states={'draft':[('readonly',False)]}),
		'invoice_line': fields.one2many('account.invoice.line', 'invoice_id', 'Invoice Lines', readonly=True, states={'draft':[('readonly',False)]}),
		'tax_line': fields.one2many('account.invoice.tax', 'invoice_id', 'Tax Lines', readonly=True, states={'draft':[('readonly',False)]}),

		'move_id': fields.many2one('account.move', 'Invoice Movement', readonly=True),
		'amount_untaxed': fields.function(_amount_untaxed, method=True, digits=(16,2),string='Untaxed Amount'),
		'amount_tax': fields.function(_amount_tax, method=True, string='Tax'),
		'amount_total': fields.function(_amount_total, method=True, string='Total'),
		'currency_id': fields.many2one('res.currency', 'Currency', required=True),
		'journal_id': fields.many2one('account.journal', 'Journal', required=True, relate=True),
	}
	_defaults = {
		'type': lambda *a: 'out_invoice',
		'date_invoice': lambda *a: time.strftime('%Y-%m-%d'),
		'state': lambda *a: 'draft',
		'journal_id': _get_journal,
		'currency_id': _get_currency,
	}
	
	def unlink(self, cr, uid, ids):
		invoices = self.read(cr, uid, ids, ['state'])
		unlink_ids = []
		for t in invoices:
			if t['state'] in ('draft', 'cancel'):
				unlink_ids.append(t['id'])
			else:
				raise osv.except_osv('Invalid action !', 'Cannot delete invoice(s) which are already opened or paid !')
		osv.osv.unlink(self, cr, uid, unlink_ids)
		return True

#	def get_invoice_address(self, cr, uid, ids):
#		res = self.pool.get('res.partner').address_get(cr, uid, [part], ['invoice'])
#		return [{}]

	def onchange_partner_id(self, cr, uid, ids, type, partner_id):
		invoice_addr_id = False
		contact_addr_id = False
		partner_bank_id = False
		payment_term = False
		acc_id = False
		
		opt = [('uid', str(uid))]
		if partner_id:
			
			opt.insert(0, ('id', partner_id))
			res = self.pool.get('res.partner').address_get(cr, uid, [partner_id], ['contact', 'invoice'])
			contact_addr_id = res['contact']
			invoice_addr_id = res['invoice']
			p = self.pool.get('res.partner').browse(cr, uid, partner_id)
			if type in ('out_invoice', 'out_refund'):
				acc_id = p.property_account_receivable
			else:
				acc_id = p.property_account_payable
				
			partner_bank_id = p.bank_ids and p.bank_ids[0] and p.bank_ids[0].id
			payment_term = p.property_payment_term and p.property_payment_term or False

		result = {'value': {'address_contact_id': contact_addr_id, 'address_invoice_id': invoice_addr_id,
							'account_id': acc_id,'partner_bank_id':partner_bank_id,
							'payment_term':payment_term}}

		if partner_id and p.property_payment_term:
			result['value']['payment_term'] = p.property_payment_term
		return result

	def onchange_currency_id(self, cr, uid, ids, curr_id):
		return {}
	
	def onchange_payment_term(self, cr, uid, ids, payment_term_id):
		if not payment_term_id:
			return {}
		res={}
		pt_obj= self.pool.get('account.payment.term')

		if ids :
			invoice= self.pool.get('account.invoice').browse(cr, uid, ids)[0]
			date_invoice= invoice.date_invoice
		else:
			date_invoice= time.strftime('%Y-%m-%d')
			
		pterm_list= pt_obj.compute(cr, uid, payment_term_id, value=1, date_ref=date_invoice)

		if pterm_list:
			pterm_list = [line[0] for line in pterm_list]
			pterm_list.sort()
			res= {'value':{'date_due': pterm_list[-1]}}


		disc_list= pt_obj.get_discounts(cr,uid,payment_term_id,date_invoice)
		if disc_list :
			res = res or {'value':{}}
			res['value'].update({'date_discount': disc_list[0][0] })

		return res
		
	
	# go from canceled state to draft state
	def action_cancel_draft(self, cr, uid, ids, *args):
		self.write(cr, uid, ids, {'state':'draft'})
		wf_service = netsvc.LocalService("workflow")
		for inv_id in ids:
			wf_service.trg_create(uid, 'account.invoice', inv_id, cr)
		return True

	# Workflow stuff
	#################

	# return the ids of the move lines which has the same account than the invoice
	# whose id is in ids
	def move_line_id_payment_get(self, cr, uid, ids, *args):
		ml = self.pool.get('account.move.line')
		res = []
		for inv in self.read(cr, uid, ids, ['move_id','account_id']):
			if inv['move_id']:
				move_line_ids = ml.search(cr, uid, [('move_id', '=', inv['move_id'][0])])
				for line in ml.read(cr, uid, move_line_ids, ['account_id']):
					if line['account_id']==inv['account_id']:
						res.append(line['id'])
		return res

	def copy(self, cr, uid, id, default=None, context={}):
		if not default: default = {}
		default.update({'state':'draft', 'number':False, 'move_id':False})
		return super(account_invoice, self).copy(cr, uid, id, default, context)

	def test_paid(self, cr, uid, ids, *args):
		res = self.move_line_id_payment_get(cr, uid, ids)
		if not res:
			return False
		ok = True
		for id in res:
			cr.execute('select reconcile_id from account_move_line where id=%d', (id,))
			ok = ok and  bool(cr.fetchone()[0])
		return ok

	def button_compute(self, cr, uid, ids, context={}):
		for id in ids:
			self.pool.get('account.invoice.line').move_line_get(cr, uid, id)
		return True

	def action_move_create(self, cr, uid, ids, *args):
		company_currency = self.pool.get('res.users').browse(cr, uid, uid).company_id.currency_id.id
		id_set = ','.join([str(i) for i in ids])
		cr.execute('SELECT * FROM account_invoice WHERE move_id IS NULL AND id IN ('+id_set+')')
		for inv in cr.dictfetchall():
			# create the analytical lines
			line_ids = self.read(cr, uid, [inv['id']], ['invoice_line'])[0]['invoice_line']
			ils = self.pool.get('account.invoice.line').read(cr, uid, line_ids)
			if inv['type'] in ('out_invoice', 'in_refund'):
				sign = 1
			else:
				sign = -1
			# one move line per invoice line
			iml = self.pool.get('account.invoice.line').move_line_get(cr, uid, inv['id'])
			if inv['project_id']:
				for il in iml:
					il['analytic_lines'] = [(0,0, {
						'name': il['name'],
						'date': time.strftime('%Y-%m-%d'),
						'account_id': inv['project_id'],
						'unit_amount': il['quantity'],
						'amount': il['price'] * sign,
						#'product_id': il['product_id']  and il['product_id'][0],
						#'product_uom_id': il['uos_id']  and il['uos_id'][0],
						'general_account_id': il['account_id'],
						'journal_id': self._get_journal_analytic(cr, uid, inv['type'])
					})]

			# one move line per tax line
			iml += self.pool.get('account.invoice.tax').move_line_get(cr, uid, inv['id'])

			
			# create one move line for the total and possibly adjust the other lines amount
			total = 0
			total_currency = 0
			for i in iml:
				if inv['currency_id'] != company_currency:
					i['currency_id'] = inv['currency_id']
					i['amount_currency'] = i['price']
					i['price'] = self.pool.get('res.currency').compute(cr, uid, inv['currency_id'], company_currency, i['price'], context={'date': inv['date_invoice']})
				else:
					i['amount_currency'] = False
					i['currency_id'] = False
				i['ref'] = inv['number']
				if inv['type'] in ('out_invoice','in_refund'):
					total += i['price']
					total_currency += i['amount_currency'] or i['price']
					i['price'] = - i['price']
				else:
					total -= i['price']
					total_currency -= i['amount_currency'] or i['price']
			acc_id = inv['account_id']

			name = inv['name']
			if inv['payment_term']:
				totlines = self.pool.get('account.payment.term').compute(cr, uid, inv['payment_term'], total)
				res_amount_currency = total_currency
				i = 0
				for t in totlines:
					if inv['currency_id'] != company_currency:
						amount_currency = self.pool.get('res.currency').compute(cr, uid, company_currency, inv['currency_id'], t[1])
					else:
						amount_currency = False

					# last line add the diff
					res_amount_currency -= amount_currency or 0
					i += 1
					if i == len(totlines):
						amount_currency += res_amount_currency

					iml.append({ 'type':'dest', 'name':name, 'price': t[1], 'account_id':acc_id, 'date_maturity': t[0], 'amount_currency': amount_currency, 'currency_id': inv['currency_id'], 'ref': inv['number']})
			else:
				iml.append({ 'type':'dest', 'name':name, 'price': total, 'account_id':acc_id, 'date_maturity' : inv['date_due'] or False, 'amount_currency': total_currency, 'currency_id': inv['currency_id'], 'ref': inv['number']})

			date = inv['date_invoice']
			part = inv['partner_id']
			line = map(lambda x:(0,0,{
				'date':date,
				'date_maturity': x.get('date_maturity', False),
				'partner_id':part,
				'name':x['name'],
				'debit':x['price']>0 and x['price'],
				'credit':x['price']<0 and -x['price'],
				'account_id':x['account_id'],
				'analytic_lines':x.get('analytic_lines', []),
				'amount_currency':x.get('amount_currency', False),
				'currency_id':x.get('currency_id', False),
				'tax_code_id': x.get('tax_code_id', False),
				'tax_amount': x.get('tax_amount', False),
				'ref':x.get('ref',False) }) ,iml)

			journal_id = inv['journal_id'] #self._get_journal(cr, uid, {'type': inv['type']})
			journal = self.pool.get('account.journal').browse(cr, uid, journal_id)
			if journal.sequence_id:
				name = self.pool.get('ir.sequence').get_id(cr, uid, journal.sequence_id.id)

			move = {'name': name, 'line_id': line, 'journal_id': journal_id}
			if inv['period_id']:
				move['period_id'] = inv['period_id']
				for i in line:
					i[2]['period_id'] = inv['period_id']
			move_id = self.pool.get('account.move').create(cr, uid, move)

			# make the invoice point to that move
			self.write(cr, uid, [inv['id']], {'move_id': move_id})

		self._log_event(cr, uid, ids)
		return True

	def action_number(self, cr, uid, ids, *args):
		cr.execute('SELECT id, type, number, move_id FROM account_invoice WHERE id IN ('+','.join(map(str,ids))+')')
		for (id, invtype, number, move_id) in cr.fetchall():
			if not number:
				number = self.pool.get('ir.sequence').get(cr, uid, 'account.invoice.'+invtype)
				cr.execute('UPDATE account_invoice SET number=%s WHERE id=%d', (number, id))
				cr.execute('UPDATE account_move_line SET ref=%s WHERE move_id=%d and ref is null', (number, move_id))
		return True

	def action_cancel(self, cr, uid, ids, *args):
		invoices = self.read(cr, uid, ids, ['move_id'])
		for i in invoices:
			if i['move_id']:
				# delete the move this invoice was pointing to
				# Note that the corresponding move_lines and move_reconciles 
				# will be automatically deleted too
				self.pool.get('account.move').unlink(cr, uid, [i['move_id'][0]])
		self.write(cr, uid, ids, {'state':'cancel', 'move_id':False})
		self._log_event(cr, uid, ids,-1.0, 'Cancel Invoice')
		return True

	###################

	def list_distinct_taxes(self, cr, uid, ids):
		invoices = self.browse(cr, uid, ids)
		taxes = {}
		for inv in invoices:
			for tax in inv.tax_line:
				if not tax['name'] in taxes:
					taxes[tax['name']] = {'name': tax['name']}
		return taxes.values()

	def _log_event(self, cr, uid, ids, factor=1.0, name='Open Invoice'):
		invs = self.read(cr, uid, ids, ['type','partner_id','amount_untaxed'])
		for inv in invs:
			part=inv['partner_id'] and inv['partner_id'][0]
			pc = pr = 0.0
			cr.execute('select sum(quantity*price_unit) from account_invoice_line where invoice_id=%d', (inv['id'],))
			total = inv['amount_untaxed']
			if inv['type'] in ('in_invoice','in_refund'):
				partnertype='supplier'
				eventtype = 'purchase'
				pc = total*factor
			else:
				partnertype = 'customer'
				eventtype = 'sale'
				pr = total*factor
			if self.pool.get('res.partner.event.type').check(cr, uid, 'invoice_open'):
				self.pool.get('res.partner.event').create(cr, uid, {'name':'Invoice: '+name, 'som':False, 'description':name+' '+str(inv['id']), 'document':name, 'partner_id':part, 'date':time.strftime('%Y-%m-%d %H:%M:%S'), 'canal_id':False, 'user_id':uid, 'partner_type':partnertype, 'probability':1.0, 'planned_revenue':pr, 'planned_cost':pc, 'type':eventtype})
		return len(invs)

	def name_search(self, cr, user, name, args=[], operator='ilike', context={}):
		ids = []
		if name:
			ids = self.search(cr, user, [('number','=',name)]+ args)
		if not ids:
			ids = self.search(cr, user, [('name',operator,name)]+ args)
		return self.name_get(cr, user, ids)

	def refund(self, cr, uid, ids):
		invoices = self.read(cr, uid, ids, ['name', 'type', 'number', 'reference', 'project_id', 'comment', 'date_due', 'partner_id', 'address_contact_id', 'address_invoice_id', 'partner_contact', 'partner_insite', 'partner_ref', 'payment_term', 'account_id', 'currency_id', 'invoice_line', 'tax_line'])

		new_ids = []
		for invoice in invoices:
			del invoice['id']
			
			type_dict = {
				'out_invoice': 'out_refund', # Customer Invoice
				'in_invoice': 'in_refund',   # Supplier Invoice
				'out_refund': 'out_invoice', # Customer Refund
				'in_refund': 'in_invoice',   # Supplier Refund
			}
			
			def cleanup_lines(lines):
				for line in lines:
					del line['id']
					del line['invoice_id']
					line['account_id'] = line['account_id'] and line['account_id'][0]
					line['product_id'] = line['product_id'] and line['product_id'][0]
					line['uos_id'] = line['uos_id'] and line['uos_id'][0]
					line['invoice_line_tax_id'] = [(6,0, line.get('invoice_line_tax_id', [])) ]
				return map(lambda x: (0,0,x), lines)
				
			invoice_lines = self.pool.get('account.invoice.line').read(cr, uid, invoice['invoice_line'])
			invoice_lines = cleanup_lines(invoice_lines)
			
			tax_lines = self.pool.get('account.invoice.tax').read(cr, uid, invoice['tax_line'])
			tax_lines = filter(lambda l: l['manual'], tax_lines)
			tax_lines = cleanup_lines(tax_lines)
			
			invoice.update({
				'type': type_dict[invoice['type']],
				'date_invoice': time.strftime('%Y-%m-%d'),
				'state': 'draft',
				'number': False,
				'invoice_line': invoice_lines,
				'tax_line': tax_lines
			})
		
			# take the id part of the tuple returned for many2one fields
			for field in ('address_contact_id', 'address_invoice_id', 'partner_id', 
					'project_id', 'account_id', 'currency_id', 'payment_term'):
				invoice[field] = invoice[field] and invoice[field][0]

			# create the new invoice
			new_ids.append(self.create(cr, uid, invoice))
		return new_ids

	def pay_and_reconcile(self, cr, uid, ids, pay_amount, pay_account_id, pay_journal_id, writeoff_acc_id, writeoff_period_id, writeoff_journal_id, context={}):
		assert len(ids)==1, "Can only pay one invoice at a time"
		invoice = self.browse(cr, uid, ids[0])
		src_account_id = invoice.account_id.id
		journal = self.pool.get('account.journal').browse(cr, uid, pay_journal_id)
		if journal.sequence_id:
			name = self.pool.get('ir.sequence').get_id(cr, uid, journal.sequence_id.id)
		else:
			raise osv.except_osv('No piece number !', 'Can not create an automatic sequence for this piece !\n\nPut a sequence in the journal definition for automatic numbering or create a sequence manually for this piece.')
		types = {'out_invoice': -1, 'in_invoice': 1, 'out_refund': 1, 'in_refund': -1}
		direction = types[invoice.type]
		l1 = {
			'name': name,
			'debit': direction == 1 and pay_amount,
			'credit': direction == -1 and pay_amount,
			'account_id': src_account_id,
			'partner_id': invoice.partner_id.id
		}
		l2 = {
			'name':name,
			'debit': direction == -1 and pay_amount,
			'credit': direction == 1 and pay_amount,
			'account_id': pay_account_id,
			'partner_id': invoice.partner_id.id
		}
		lines = [(0, 0, l1), (0, 0, l2)]
		move = {'name': name, 'line_id': lines, 'journal_id': pay_journal_id}
		move_id = self.pool.get('account.move').create(cr, uid, move)
		
		line_ids = []
		line = self.pool.get('account.move.line')
		cr.execute('select id from account_move_line where move_id in ('+str(move_id)+','+str(invoice.move_id.id)+')')
		lines = line.browse(cr, uid, map(lambda x: x[0], cr.fetchall()) )
		for l in lines:
			if l.account_id.id==src_account_id:
				line_ids.append(l.id)

		self.pool.get('account.move.line').reconcile(cr, uid, line_ids, 'manual', writeoff_acc_id, writeoff_period_id, writeoff_journal_id, context)
		return True
account_invoice()

class account_invoice_line(osv.osv):
	def _amount_line(self, cr, uid, ids, prop, unknow_none,unknow_dict):
		res = {}
		for line in self.browse(cr, uid, ids):
			res[line.id] = round(line.price_unit * line.quantity * (1-(line.discount or 0.0)/100.0),2)
		return res
	_name = "account.invoice.line"
	_description = "Invoice line"
	_columns = {
		'name': fields.char('Description', size=256, required=True),
		'invoice_id': fields.many2one('account.invoice', 'Invoice Ref', ondelete='cascade', select=True),
		'uos_id': fields.many2one('product.uom', 'Unit', ondelete='set null'),
		'product_id': fields.many2one('product.product', 'Product', ondelete='set null'),
		'account_id': fields.many2one('account.account', 'Source Account', required=True, domain=[('type','<>','view')]),
		'price_unit': fields.float('Unit Price', required=True),
		'price_subtotal': fields.function(_amount_line, method=True, string='Subtotal'),
		'quantity': fields.float('Quantity', required=True),
		'discount': fields.float('Discount (%)', digits=(16,2)),
		'invoice_line_tax_id': fields.many2many('account.tax', 'account_invoice_line_tax', 'invoice_line_id', 'tax_id', 'Taxes', domain=[('parent_id','=',False)]),
		'note': fields.text('Notes'),
	}
	_defaults = {
		'quantity': lambda *a: 1,
		'discount': lambda *a: 0.0
	}
	def product_id_change(self, cr, uid, ids, product, uom, qty=0, name='', type='out_invoice', partner_id=None):
		if not product:
			return {'value': {'price_unit': 0.0}, 'domain':{'product_uom':[]}}
		lang=False
		if partner_id:
			lang=self.pool.get('res.partner').read(cr, uid, [partner_id])[0]['lang']
		context={'lang': lang}
		res = self.pool.get('product.product').browse(cr, uid, product, context=context)

		if type in ('out_invoice', 'out_refund'):
			result = {'price_unit': res.list_price, 'invoice_line_tax_id':map(lambda x: x.id, res.taxes_id)}
		else:
			result = {'price_unit': res.list_price, 'invoice_line_tax_id':map(lambda x: x.id, res.supplier_taxes_id)}
		if not name:
			result['name'] = res.name

		if type in ('out_invoice','out_refund'):
			a =  res.product_tmpl_id.property_account_income
			if not a:
				a = res.categ_id.property_account_income_categ
			result['account_id'] = a[0]
		else:
			a =  res.product_tmpl_id.property_account_expense
			if not a:
				a = res.categ_id.property_account_expense_categ
			result['account_id'] = a[0]

		domain = {}
		result['uos_id'] = uom or res.uom_id.id or False
		if result['uos_id']:
			res2 = res.uom_id.category_id.id
			if res2 :
				domain = {'uos_id':[('category_id','=',res2 )]}
		return {'value':result, 'domain':domain}

	def move_line_get(self, cr, uid, invoice_id, context={}):
		res = []
		tax_grouped = {}
		tax_obj = self.pool.get('account.tax')
		cur_obj = self.pool.get('res.currency')
		ait_obj = self.pool.get('account.invoice.tax')
#TODO: rewrite using browse instead of the manual SQL queries
#		cr.execute('SELECT id FROM account_invoice_line WHERE invoice_id=%d', (invoice_id,))
		inv = self.pool.get('account.invoice').browse(cr, uid, invoice_id)
		cur = inv.currency_id

		for line in inv.invoice_line:
			res.append( {
				'type':'src', 
				'name':line.name, 
				'price_unit':line.price_unit, 
				'quantity':line.quantity, 
				'price':round(line.quantity*line.price_unit * (1.0- (line.discount or 0.0)/100.0),2),
				'account_id':line.account_id.id
			})
			for tax in tax_obj.compute(cr, uid, line.invoice_line_tax_id, (line.price_unit *(1.0-(line['discount'] or 0.0)/100.0)), line.quantity, inv.address_invoice_id.id, line.product_id):
				val={}
				val['invoice_id'] = inv.id
				val['name'] = tax['name']
				val['amount'] = cur_obj.round(cr, uid, cur, tax['amount'])
				val['manual'] = False
				val['sequence'] = tax['sequence']
				val['base'] = tax['price_unit'] * line['quantity']

				#
				# Setting the tax account and amount for the line
				#
				if inv.type in ('out_invoice','in_invoice'):
					val['base_code_id'] = tax['base_code_id']
					val['tax_code_id'] = tax['tax_code_id']
					val['base_amount'] = val['base'] * tax['base_sign']
					val['tax_amount'] = val['amount'] * tax['tax_sign']
					val['account_id'] = tax['account_collected_id'] or line.account_id.id
				else:
					val['base_code_id'] = tax['ref_base_code_id']
					val['tax_code_id'] = tax['ref_tax_code_id']
					val['base_amount'] = val['base'] * tax['ref_base_sign']
					val['tax_amount'] = val['amount'] * tax['ref_tax_sign']
					val['account_id'] = tax['account_paid_id'] or line.account_id.id

				res[-1]['tax_code_id'] = val['base_code_id']
				res[-1]['tax_amount'] = val['base_amount']

				key = (val['tax_code_id'], val['base_code_id'], val['account_id'])
				if not key in tax_grouped:
					tax_grouped[key] = val
				else:
					tax_grouped[key]['amount'] += val['amount']
					tax_grouped[key]['base'] += val['base']
					tax_grouped[key]['base_amount'] += val['base_amount']
					tax_grouped[key]['tax_amount'] += val['tax_amount']
		# delete automatic tax lines for this invoice
		cr.execute("DELETE FROM account_invoice_tax WHERE NOT manual AND invoice_id=%d", (invoice_id,))
		for t in tax_grouped.values():
			ait_obj.create(cr, uid, t)
		return res

	#
	# Set the tax field according to the account and the partner
	# 
	def onchange_account_id(self, cr, uid, ids, partner_id,account_id):
		if not (partner_id and account_id):
			return {}
		taxes = self.pool.get('account.account').browse(cr, uid, account_id).tax_ids
		taxep = self.pool.get('res.partner').browse(cr, uid, partner_id).property_account_tax
		if not taxep:
			return {'value': {'invoice_line_tax_id': map(lambda x: x.id, taxes or []) }}
		res = [taxep[0]]
		tp = self.pool.get('account.tax').browse(cr, uid, taxep[0])
		for t in taxes:
			if not t.tax_group==tp.tax_group:
				res.append(t.id)
		r = {'value':{'invoice_line_tax_id': res}}
		return r
account_invoice_line()

class account_invoice_tax(osv.osv):
	_name = "account.invoice.tax"
	_description = "Invoice Tax"
	_columns = {
		'invoice_id': fields.many2one('account.invoice', 'Invoice Line', ondelete='cascade', select=True),
		'name': fields.char('Tax Description', size=64, required=True),
		'account_id': fields.many2one('account.account', 'Tax Account', required=True, domain=[('type','<>','view'),('type','<>','income')]),
		'base': fields.float('Base', digits=(16,2)),
		'amount': fields.float('Amount', digits=(16,2)),
		'manual': fields.boolean('Manual'),
		'sequence': fields.integer('Sequence'),

		'base_code_id': fields.many2one('account.tax.code', 'Base Code'),
		'base_amount': fields.float('Base Code Amount', digits=(16,2)),
		'tax_code_id': fields.many2one('account.tax.code', 'Tax Code'),
		'tax_amount': fields.float('Tax Code Amount', digits=(16,2)),
	}
	_order = 'sequence'
	_defaults = {
		'manual': lambda *a: 1,
		'base_amount': lambda *a: 0.0,
		'tax_amount': lambda *a: 0.0,
	}
	def move_line_get(self, cr, uid, invoice_id):
		res = []
		cr.execute('SELECT * FROM account_invoice_tax WHERE invoice_id=%d', (invoice_id,))
		for t in cr.dictfetchall():
			res.append({
				'type':'tax',
				'name':t['name'],
				'price_unit': t['amount'],
				'quantity': 1,
				'price': t['amount'] or 0.0,
				'account_id': t['account_id'],
				'tax_code_id': t['tax_code_id'],
				'tax_amount': t['tax_amount']
			})
		return res
account_invoice_tax()