# -*- coding: utf-8 -*-
##############################################################################
#
#    OpenERP, Open Source Management Solution
#    Copyright (C) 2004-2010 Tiny SPRL (<http://tiny.be>).
#
#    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/>.
#
##############################################################################

import time

from openerp.osv import fields, osv
from openerp.tools.translate import _

class hr_timesheet_invoice_factor(osv.osv):
    _name = "hr_timesheet_invoice.factor"
    _description = "Invoice Rate"
    _order = 'factor'
    _columns = {
        'name': fields.char('Internal Name', size=128, required=True, translate=True),
        'customer_name': fields.char('Name', size=128, help="Label for the customer"),
        'factor': fields.float('Discount (%)', required=True, help="Discount in percentage"),
    }
    _defaults = {
        'factor': lambda *a: 0.0,
    }



class account_analytic_account(osv.osv):
    def _invoiced_calc(self, cr, uid, ids, name, arg, context=None):
        obj_invoice = self.pool.get('account.invoice')
        res = {}

        cr.execute('SELECT account_id as account_id, l.invoice_id '
                'FROM hr_analytic_timesheet h LEFT JOIN account_analytic_line l '
                    'ON (h.line_id=l.id) '
                    'WHERE l.account_id = ANY(%s)', (ids,))
        account_to_invoice_map = {}
        for rec in cr.dictfetchall():
            account_to_invoice_map.setdefault(rec['account_id'], []).append(rec['invoice_id'])

        for account in self.browse(cr, uid, ids, context=context):
            invoice_ids = filter(None, list(set(account_to_invoice_map.get(account.id, []))))
            for invoice in obj_invoice.browse(cr, uid, invoice_ids, context=context):
                res.setdefault(account.id, 0.0)
                res[account.id] += invoice.amount_untaxed
        for id in ids:
            res[id] = round(res.get(id, 0.0),2)

        return res

    _inherit = "account.analytic.account"
    _columns = {
        'pricelist_id': fields.many2one('product.pricelist', 'Pricelist',
            help="The product to invoice is defined on the employee form, the price will be deducted by this pricelist on the product."),
        'amount_max': fields.float('Max. Invoice Price',
            help="Keep empty if this contract is not limited to a total fixed price."),
        'amount_invoiced': fields.function(_invoiced_calc, string='Invoiced Amount',
            help="Total invoiced"),
        'to_invoice': fields.many2one('hr_timesheet_invoice.factor', 'Timesheet Invoicing Ratio',
            help="You usually invoice 100% of the timesheets. But if you mix fixed price and timesheet invoicing, you may use another ratio. For instance, if you do a 20% advance invoice (fixed price, based on a sales order), you should invoice the rest on timesheet with a 80% ratio."),
    }

    def on_change_partner_id(self, cr, uid, ids, partner_id, name, context=None):
        res = super(account_analytic_account, self).on_change_partner_id(cr, uid, ids, partner_id, name, context=context)
        if partner_id:
            part = self.pool.get('res.partner').browse(cr, uid, partner_id, context=context)
            pricelist = part.property_product_pricelist and part.property_product_pricelist.id or False
            if pricelist:
                res['value']['pricelist_id'] = pricelist
        return res

    def set_close(self, cr, uid, ids, context=None):
        return self.write(cr, uid, ids, {'state': 'close'}, context=context)

    def set_cancel(self, cr, uid, ids, context=None):
        return self.write(cr, uid, ids, {'state': 'cancelled'}, context=context)

    def set_open(self, cr, uid, ids, context=None):
        return self.write(cr, uid, ids, {'state': 'open'}, context=context)

    def set_pending(self, cr, uid, ids, context=None):
        return self.write(cr, uid, ids, {'state': 'pending'}, context=context)


class account_analytic_line(osv.osv):
    _inherit = 'account.analytic.line'
    _columns = {
        'invoice_id': fields.many2one('account.invoice', 'Invoice', ondelete="set null"),
        'to_invoice': fields.many2one('hr_timesheet_invoice.factor', 'Invoiceable', help="It allows to set the discount while making invoice, keep empty if the activities should not be invoiced."),
    }

    def _default_journal(self, cr, uid, context=None):
        proxy = self.pool.get('hr.employee')
        record_ids = proxy.search(cr, uid, [('user_id', '=', uid)], context=context)
        if record_ids:
            employee = proxy.browse(cr, uid, record_ids[0], context=context)
            return employee.journal_id and employee.journal_id.id or False
        return False

    def _default_general_account(self, cr, uid, context=None):
        proxy = self.pool.get('hr.employee')
        record_ids = proxy.search(cr, uid, [('user_id', '=', uid)], context=context)
        if record_ids:
            employee = proxy.browse(cr, uid, record_ids[0], context=context)
            if employee.product_id and employee.product_id.property_account_income:
                return employee.product_id.property_account_income.id
        return False

    _defaults = {
        'journal_id' : _default_journal,
        'general_account_id' : _default_general_account,
    }

    def write(self, cr, uid, ids, vals, context=None):
        self._check_inv(cr, uid, ids, vals)
        return super(account_analytic_line,self).write(cr, uid, ids, vals,
                context=context)

    def _check_inv(self, cr, uid, ids, vals):
        select = ids
        if isinstance(select, (int, long)):
            select = [ids]
        if ( not vals.has_key('invoice_id')) or vals['invoice_id' ] == False:
            for line in self.browse(cr, uid, select):
                if line.invoice_id:
                    raise osv.except_osv(_('Error!'),
                        _('You cannot modify an invoiced analytic line!'))
        return True

    def copy(self, cursor, user, obj_id, default=None, context=None):
        if default is None:
            default = {}
        default = default.copy()
        default.update({'invoice_id': False})
        return super(account_analytic_line, self).copy(cursor, user, obj_id,
                default, context=context)

    def _get_invoice_price(self, cr, uid, account, product_id, user_id, qty, context = {}):
        pro_price_obj = self.pool.get('product.pricelist')
        if account.pricelist_id:
            pl = account.pricelist_id.id
            price = pro_price_obj.price_get(cr,uid,[pl], product_id, qty or 1.0, account.partner_id.id, context=context)[pl]
        else:
            price = 0.0
        return price

    def invoice_cost_create(self, cr, uid, ids, data=None, context=None):
        analytic_account_obj = self.pool.get('account.analytic.account')
        account_payment_term_obj = self.pool.get('account.payment.term')
        invoice_obj = self.pool.get('account.invoice')
        product_obj = self.pool.get('product.product')
        invoice_factor_obj = self.pool.get('hr_timesheet_invoice.factor')
        fiscal_pos_obj = self.pool.get('account.fiscal.position')
        product_uom_obj = self.pool.get('product.uom')
        invoice_line_obj = self.pool.get('account.invoice.line')
        invoices = []
        if context is None:
            context = {}
        if data is None:
            data = {}

        journal_types = {}

        # prepare for iteration on journal and accounts
        for line in self.pool.get('account.analytic.line').browse(cr, uid, ids, context=context):
            if line.journal_id.type not in journal_types:
                journal_types[line.journal_id.type] = set()
            journal_types[line.journal_id.type].add(line.account_id.id)
        for journal_type, account_ids in journal_types.items():
            for account in analytic_account_obj.browse(cr, uid, list(account_ids), context=context):
                partner = account.partner_id
                if (not partner) or not (account.pricelist_id):
                    raise osv.except_osv(_('Analytic Account Incomplete!'),
                            _('Contract incomplete. Please fill in the Customer and Pricelist fields.'))

                date_due = False
                if partner.property_payment_term:
                    pterm_list= account_payment_term_obj.compute(cr, uid,
                            partner.property_payment_term.id, value=1,
                            date_ref=time.strftime('%Y-%m-%d'))
                    if pterm_list:
                        pterm_list = [line[0] for line in pterm_list]
                        pterm_list.sort()
                        date_due = pterm_list[-1]

                curr_invoice = {
                    'name': time.strftime('%d/%m/%Y') + ' - '+account.name,
                    'partner_id': account.partner_id.id,
                    'company_id': account.company_id.id,
                    'payment_term': partner.property_payment_term.id or False,
                    'account_id': partner.property_account_receivable.id,
                    'currency_id': account.pricelist_id.currency_id.id,
                    'date_due': date_due,
                    'fiscal_position': account.partner_id.property_account_position.id
                }
                context2 = context.copy()
                context2['lang'] = partner.lang
                # set company_id in context, so the correct default journal will be selected
                context2['force_company'] = curr_invoice['company_id']
                # set force_company in context so the correct product properties are selected (eg. income account)
                context2['company_id'] = curr_invoice['company_id']

                last_invoice = invoice_obj.create(cr, uid, curr_invoice, context=context2)
                invoices.append(last_invoice)

                cr.execute("""SELECT product_id, user_id, to_invoice, sum(amount), sum(unit_amount), product_uom_id
                        FROM account_analytic_line as line LEFT JOIN account_analytic_journal journal ON (line.journal_id = journal.id)
                        WHERE account_id = %s
                            AND line.id IN %s AND journal.type = %s AND to_invoice IS NOT NULL
                        GROUP BY product_id, user_id, to_invoice, product_uom_id""", (account.id, tuple(ids), journal_type))

                for product_id, user_id, factor_id, total_price, qty, uom in cr.fetchall():
                    context2.update({'uom': uom})

                    if data.get('product'):
                        # force product, use its public price
                        product_id = data['product'][0]
                        unit_price = self._get_invoice_price(cr, uid, account, product_id, user_id, qty, context2)
                    elif journal_type == 'general' and product_id:
                        # timesheets, use sale price
                        unit_price = self._get_invoice_price(cr, uid, account, product_id, user_id, qty, context2)
                    else:
                        # expenses, using price from amount field
                        unit_price = total_price*-1.0 / qty

                    factor = invoice_factor_obj.browse(cr, uid, factor_id, context=context2)
                    # factor_name = factor.customer_name and line_name + ' - ' + factor.customer_name or line_name
                    factor_name = factor.customer_name
                    curr_line = {
                        'price_unit': unit_price,
                        'quantity': qty,
                        'product_id': product_id or False,
                        'discount': factor.factor,
                        'invoice_id': last_invoice,
                        'name': factor_name,
                        'uos_id': uom,
                        'account_analytic_id': account.id,
                    }
                    product = product_obj.browse(cr, uid, product_id, context=context2)
                    if product:
                        factor_name = product_obj.name_get(cr, uid, [product_id], context=context2)[0][1]
                        if factor.customer_name:
                            factor_name += ' - ' + factor.customer_name

                        general_account = product.property_account_income or product.categ_id.property_account_income_categ
                        if not general_account:
                            raise osv.except_osv(_("Configuration Error!"), _("Please define income account for product '%s'.") % product.name)
                        taxes = product.taxes_id or general_account.tax_ids
                        tax = fiscal_pos_obj.map_tax(cr, uid, account.partner_id.property_account_position, taxes)
                        curr_line.update({
                            'invoice_line_tax_id': [(6,0,tax )],
                            'name': factor_name,
                            'invoice_line_tax_id': [(6,0,tax)],
                            'account_id': general_account.id,
                        })
                    #
                    # Compute for lines
                    #
                    cr.execute("SELECT * FROM account_analytic_line WHERE account_id = %s and id IN %s AND product_id=%s and to_invoice=%s ORDER BY account_analytic_line.date", (account.id, tuple(ids), product_id, factor_id))

                    line_ids = cr.dictfetchall()
                    note = []
                    for line in line_ids:
                        # set invoice_line_note
                        details = []
                        if data.get('date', False):
                            details.append(line['date'])
                        if data.get('time', False):
                            if line['product_uom_id']:
                                details.append("%s %s" % (line['unit_amount'], product_uom_obj.browse(cr, uid, [line['product_uom_id']],context2)[0].name))
                            else:
                                details.append("%s" % (line['unit_amount'], ))
                        if data.get('name', False):
                            details.append(line['name'])
                        note.append(u' - '.join(map(lambda x: unicode(x) or '',details)))
                    if note:
                        curr_line['name'] += "\n" + ("\n".join(map(lambda x: unicode(x) or '',note)))
                    invoice_line_obj.create(cr, uid, curr_line, context=context)
                    cr.execute("update account_analytic_line set invoice_id=%s WHERE account_id = %s and id IN %s", (last_invoice, account.id, tuple(ids)))

                invoice_obj.button_reset_taxes(cr, uid, [last_invoice], context)
        return invoices



class hr_analytic_timesheet(osv.osv):
    _inherit = "hr.analytic.timesheet"
    def on_change_account_id(self, cr, uid, ids, account_id, user_id=False):
        res = {}
        if not account_id:
            return res
        res.setdefault('value',{})
        acc = self.pool.get('account.analytic.account').browse(cr, uid, account_id)
        st = acc.to_invoice.id
        res['value']['to_invoice'] = st or False
        if acc.state=='pending':
            res['warning'] = {
                'title': 'Warning',
                'message': 'The analytic account is in pending state.\nYou should not work on this account !'
            }
        return res

    def copy(self, cursor, user, obj_id, default=None, context=None):
        if default is None:
            default = {}
        default = default.copy()
        default.update({'invoice_id': False})
        return super(hr_analytic_timesheet, self).copy(cursor, user, obj_id,
                default, context=context)



class account_invoice(osv.osv):
    _inherit = "account.invoice"

    def _get_analytic_lines(self, cr, uid, id, context=None):
        iml = super(account_invoice, self)._get_analytic_lines(cr, uid, id, context=context)

        inv = self.browse(cr, uid, [id], context=context)[0]
        if inv.type == 'in_invoice':
            obj_analytic_account = self.pool.get('account.analytic.account')
            for il in iml:
                if il['account_analytic_id']:
		    # *-* browse (or refactor to avoid read inside the loop)
                    to_invoice = obj_analytic_account.read(cr, uid, [il['account_analytic_id']], ['to_invoice'], context=context)[0]['to_invoice']
                    if to_invoice:
                        il['analytic_lines'][0][2]['to_invoice'] = to_invoice[0]
        return iml



class account_move_line(osv.osv):
    _inherit = "account.move.line"

    def create_analytic_lines(self, cr, uid, ids, context=None):
        res = super(account_move_line, self).create_analytic_lines(cr, uid, ids,context=context)
        analytic_line_obj = self.pool.get('account.analytic.line')
        for move_line in self.browse(cr, uid, ids, context=context):
            #For customer invoice, link analytic line to the invoice so it is not proposed for invoicing in Bill Tasks Work
            invoice_id = move_line.invoice and move_line.invoice.type in ('out_invoice','out_refund') and move_line.invoice.id or False
            for line in move_line.analytic_lines:
                analytic_line_obj.write(cr, uid, line.id, {
                    'invoice_id': invoice_id,
                    'to_invoice': line.account_id.to_invoice and line.account_id.to_invoice.id or False
                    }, context=context)
        return res


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