diff --git a/compute_purchase_order/__init__.py b/compute_purchase_order/__init__.py
new file mode 100644
index 0000000..0650744
--- /dev/null
+++ b/compute_purchase_order/__init__.py
@@ -0,0 +1 @@
+from . import models
diff --git a/compute_purchase_order/__openerp__.py b/compute_purchase_order/__openerp__.py
new file mode 100644
index 0000000..1018692
--- /dev/null
+++ b/compute_purchase_order/__openerp__.py
@@ -0,0 +1,21 @@
+# -*- encoding: utf-8 -*-
+{
+    'name': 'Computed Purchase Order',
+    'version': '9.0.1',
+    'category': 'Purchase Order',
+    'description': """ todo """,
+    'author': 'Coop IT Easy',
+    'website': 'https://github.com/coopiteasy/procurement-addons',
+    'license': 'AGPL-3',
+    'depends': [
+        'product',
+        'purchase',
+        'stock',
+        'stock_coverage',
+    ],
+    'data': [
+        'security/ir.model.access.csv',
+        'views/computed_purchase_order.xml',
+        'views/purchase_order.xml',
+    ],
+}
diff --git a/compute_purchase_order/models/__init__.py b/compute_purchase_order/models/__init__.py
new file mode 100644
index 0000000..6fdf87d
--- /dev/null
+++ b/compute_purchase_order/models/__init__.py
@@ -0,0 +1,4 @@
+from . import purchase_order
+from . import computed_purchase_order
+from . import computed_purchase_order_line
+from . import product_template
diff --git a/compute_purchase_order/models/computed_purchase_order.py b/compute_purchase_order/models/computed_purchase_order.py
new file mode 100644
index 0000000..2c4bb62
--- /dev/null
+++ b/compute_purchase_order/models/computed_purchase_order.py
@@ -0,0 +1,194 @@
+# -*- coding: utf-8 -*-
+from openerp import models, fields, api
+from openerp.exceptions import ValidationError
+
+
+class ComputedPurchaseOrder(models.Model):
+    _description = 'Computed Purchase Order'
+    _name = 'computed.purchase.order'
+    _order = 'id desc'
+
+    name = fields.Char(
+        string='CPO Reference',
+        size=64,
+        default='New')
+
+    order_date = fields.Datetime(
+        string='Purchase Order Date',
+        default=fields.Datetime.now,
+        help="Depicts the date where the Quotation should be validated and converted into a purchase order.")  # noqa
+
+    date_planned = fields.Datetime(
+        string='Date Planned'
+    )
+
+    supplier_id = fields.Many2one(
+        'res.partner',
+        string='Supplier',
+        readonly=True,
+        help="Supplier of the purchase order.")
+
+    order_line_ids = fields.One2many(
+        'computed.purchase.order.line',
+        'computed_purchase_order_id',
+        string='Order Lines',
+    )
+
+    total_amount = fields.Float(
+        string='Total Amount (w/o VAT)',
+        compute='_compute_cpo_total'
+    )
+
+    generated_purchase_order_ids = fields.One2many(
+        'purchase.order',
+        'original_cpo_id',
+        string='Generated Purchase Orders',
+    )
+
+    generated_po_count = fields.Integer(
+        string='Generated Purchase Order count',
+        compute='_compute_generated_po_count',
+    )
+
+    @api.model
+    def default_get(self, fields_list):
+        record = super(ComputedPurchaseOrder, self).default_get(fields_list)
+
+        record['date_planned'] = self._get_default_date_planned()
+        record['supplier_id'] = self._get_selected_supplier_id()
+        record['order_line_ids'] = self._create_order_lines()
+        record['name'] = self._compute_default_name()
+
+        return record
+
+    def _get_default_date_planned(self):
+        return fields.Datetime.now()
+
+    def _get_selected_supplier_id(self):
+        """
+        Calcule le vendeur associé qui a la date de début la plus récente et
+        plus petite qu’aujourd’hui pour chaque article sélectionné.
+        Will raise an error if more than two sellers are set
+        """
+        if 'active_ids' not in self.env.context:
+            return False
+
+        product_ids = self.env.context['active_ids']
+        products = self.env['product.template'].browse(product_ids)
+
+        suppliers = set()
+        for product in products:
+            main_supplier_id = product.main_supplier_id.id
+            suppliers.add(main_supplier_id)
+
+        if len(suppliers) == 0:
+            raise ValidationError(u'No supplier is set for selected articles.')
+        elif len(suppliers) == 1:
+            return suppliers.pop()
+        else:
+            raise ValidationError(
+                u'You must select article from a single supplier.')
+
+    def _create_order_lines(self):
+        product_tmpl_ids = self._get_selected_products()
+        cpol_ids = []
+        OrderLine = self.env['computed.purchase.order.line']
+        for product_id in product_tmpl_ids:
+            cpol = OrderLine.create(
+                {'computed_purchase_order_id': self.id,
+                 'product_template_id': product_id,
+                 }
+            )
+            # should ideally be set in cpol defaults
+            cpol.purchase_quantity = cpol.minimum_purchase_qty
+            cpol_ids.append(cpol.id)
+        return cpol_ids
+
+    def _compute_default_name(self):
+        supplier_id = self._get_selected_supplier_id()
+        if supplier_id:
+            supplier_name = (
+                self.env['res.partner']
+                    .browse(supplier_id)
+                    .name)
+
+            name = u'CPO {} {}'.format(
+                supplier_name,
+                fields.Date.today())
+        else:
+            name = 'New'
+        return name
+
+    def _get_selected_products(self):
+        if 'active_ids' in self.env.context:
+            return self.env.context['active_ids']
+        else:
+            return []
+
+    @api.multi
+    def _compute_generated_po_count(self):
+        for cpo in self:
+            cpo.generated_po_count = len(cpo.generated_purchase_order_ids)
+
+    @api.multi
+    def get_generated_po_action(self):
+        self.ensure_one()
+        action = {
+            'type': 'ir.actions.act_window',
+            'res_model': 'purchase.order',
+            'view_mode': 'tree,form,kanban',
+            'target': 'current',
+            'domain': [('id', 'in', self.generated_purchase_order_ids.ids)],
+        }
+        return action
+
+    # @api.onchange(order_line_ids)  # fixme
+    @api.multi
+    def _compute_cpo_total(self):
+        for cpo in self:
+            total_amount = sum(cpol.subtotal for cpol in cpo.order_line_ids)
+            cpo.total_amount = total_amount
+
+    @api.multi
+    def create_purchase_order(self):
+        self.ensure_one()
+
+        if sum(self.order_line_ids.mapped('purchase_quantity')) == 0:
+            raise ValidationError(u'You need at least a product to generate '
+                                  u'a Purchase Order')
+
+        PurchaseOrder = self.env['purchase.order']
+        PurchaseOrderLine = self.env['purchase.order.line']
+
+        po_values = {
+            'name': 'New',
+            'date_order': self.order_date,
+            'partner_id': self.supplier_id.id,
+            'date_planned': self.date_planned,
+        }
+        purchase_order = PurchaseOrder.create(po_values)
+
+        for cpo_line in self.order_line_ids:
+            if cpo_line.purchase_quantity > 0:
+                pol_values = {
+                    'name': cpo_line.name,
+                    'product_id': cpo_line.get_default_product_product().id,
+                    'product_qty': cpo_line.purchase_quantity,
+                    'price_unit': cpo_line.product_price,
+                    'product_uom': cpo_line.uom_po_id.id,
+                    'order_id': purchase_order.id,
+                    'date_planned': self.date_planned,
+                }
+                PurchaseOrderLine.create(pol_values)
+
+            self.generated_purchase_order_ids += purchase_order
+
+        action = {
+            'type': 'ir.actions.act_window',
+            'res_model': 'purchase.order',
+            'res_id': purchase_order.id,
+            'view_type': 'form',
+            'view_mode': 'form',
+            'target': 'current',
+        }
+        return action
diff --git a/compute_purchase_order/models/computed_purchase_order_line.py b/compute_purchase_order/models/computed_purchase_order_line.py
new file mode 100644
index 0000000..92ca505
--- /dev/null
+++ b/compute_purchase_order/models/computed_purchase_order_line.py
@@ -0,0 +1,196 @@
+# -*- coding: utf-8 -*-
+import logging
+
+from openerp import models, fields, api
+from openerp.exceptions import ValidationError
+
+_logger = logging.getLogger(__name__)
+
+
+class ComputedPurchaseOrderLine(models.Model):
+    _description = 'Computed Purchase Order Line'
+    _name = 'computed.purchase.order.line'
+
+    computed_purchase_order_id = fields.Many2one(
+        'computed.purchase.order',
+        string='Computed Purchase Order',
+    )
+
+    product_template_id = fields.Many2one(
+        'product.template',
+        string='Linked Product Template',
+        required=True,
+        help='Product')
+
+    name = fields.Char(
+        string='Product Name',
+        related='product_template_id.name',
+        read_only=True)
+
+    supplierinfo_id = fields.Many2one(
+        'product.supplierinfo',
+        string='Supplier information',
+        compute='_compute_supplierinfo',
+        store=True,
+        readonly=True,
+    )
+
+    category_id = fields.Many2one(
+        'product.category',
+        string='Internal Category',
+        related='product_template_id.categ_id',
+        read_only=True)
+
+    uom_id = fields.Many2one(
+        'product.uom',
+        string='Unit of Measure',
+        read_only=True,
+        related='product_template_id.uom_id',
+        help="Default Unit of Measure used for all stock operation.")
+
+    qty_available = fields.Float(
+        string='Stock Quantity',
+        related='product_template_id.qty_available',
+        read_only=True,
+        help='Quantity currently in stock. Does not take '
+             'into account incoming orders.')
+
+    virtual_available = fields.Float(
+        string='Stock Quantity',
+        related='product_template_id.virtual_available',
+        read_only=True,
+        help='Virtual quantity taking into account current stock, incoming '
+             'orders and outgoing sales.')
+
+    average_consumption = fields.Float(
+        string='Average Consumption',
+        related='product_template_id.average_consumption',
+        read_only=True)
+
+    stock_coverage = fields.Float(
+        string='Stock Coverage',
+        related='product_template_id.estimated_stock_coverage',
+        read_only=True,
+    )
+
+    minimum_purchase_qty = fields.Float(
+        string='Minimum Purchase Quantity',
+        compute='_depends_on_product_template',
+    )
+
+    purchase_quantity = fields.Float(
+        string='Purchase Quantity',
+        required=True,
+        default=0.)
+
+    uom_po_id = fields.Many2one(
+        'product.uom',
+        string='Purchase Unit of Measure',
+        read_only=True,
+        related='product_template_id.uom_po_id',
+        help="Default Unit of Measure used for all stock operation.")
+
+    product_price = fields.Float(
+        string='Product Price (w/o VAT)',
+        compute='_depends_on_product_template',
+        read_only=True,
+        help='Supplier Product Price by buying unit. Price is  without VAT')
+
+    virtual_coverage = fields.Float(
+        string='Expected Stock Coverage',
+        compute='_depends_on_purchase_quantity',
+        help='Expected stock coverage (in days) based on current stocks and average daily consumption')  # noqa
+
+    subtotal = fields.Float(
+        string='Subtotal (w/o VAT)',
+        compute='_depends_on_purchase_quantity')
+
+    @api.multi
+    @api.depends('product_template_id')
+    def _depends_on_product_template(self):
+        for cpol in self:
+            # get supplier info
+            cpol.minimum_purchase_qty = cpol.supplierinfo_id.min_qty
+            cpol.product_price = cpol.supplierinfo_id.price
+
+    @api.multi
+    @api.onchange('product_template_id')
+    def _onchange_purchase_quantity(self):
+        for cpol in self:
+            cpol.purchase_quantity = cpol.supplierinfo_id.min_qty
+
+    @api.depends('purchase_quantity')
+    @api.multi
+    def _depends_on_purchase_quantity(self):
+        for cpol in self:
+            cpol.subtotal = cpol.product_price * cpol.purchase_quantity
+            avg = cpol.average_consumption
+            if avg > 0:
+                qty = cpol.virtual_available + cpol.purchase_quantity
+                cpol.virtual_coverage = qty / avg
+            else:
+                # todo what would be a good default value? (not float(inf))
+                cpol.virtual_coverage = 9999
+
+        return True
+
+    @api.multi
+    @api.depends('product_template_id')
+    @api.onchange('product_template_id')
+    def _compute_supplierinfo(self):
+        for cpol in self:
+            if not cpol.product_template_id:
+                cpol.supplierinfo_id = False
+            else:
+                SupplierInfo = self.env['product.supplierinfo']
+                si = SupplierInfo.search([
+                    ('product_tmpl_id', '=', cpol.product_template_id.id),
+                    ('name', '=', cpol.product_template_id.main_supplier_id.id)  # noqa
+                ])
+
+                if len(si) == 0:
+                    raise ValidationError(
+                        u'No supplier information set for {name}'
+                        .format(name=cpol.product_template_id.name))
+                elif len(si) == 1:
+                    cpol.supplierinfo_id = si
+                else:
+                    _logger.warning(
+                        u'product {name} has several suppliers, chose last'
+                        .format(name=cpol.product_template_id.name)
+                    )
+                    si = si.sorted(key=lambda r: r.create_date, reverse=True)
+                    cpol.supplierinfo_id = si[0]
+
+    @api.constrains('purchase_quantity')
+    def _check_minimum_purchase_quantity(self):
+        for cpol in self:
+            if cpol.purchase_quantity < 0:
+                raise ValidationError(u'Purchase quantity for {product_name} must be greater than 0'  # noqa
+                                        .format(product_name=cpol.product_template_id.name))
+            elif 0 < cpol.purchase_quantity < cpol.minimum_purchase_qty:
+                raise ValidationError(u'Purchase quantity for {product_name} must be greater than {min_qty}'  # noqa
+                                       .format(product_name=cpol.product_template_id.name,
+                                               min_qty=cpol.minimum_purchase_qty))
+
+    @api.multi
+    def get_default_product_product(self):
+        self.ensure_one()
+        ProductProduct = self.env['product.product']
+        products = ProductProduct.search([
+            ('product_tmpl_id', '=', self.product_template_id.id)
+        ])
+
+        products = products.sorted(
+            key=lambda product: product.create_date,
+            reverse=True
+        )
+
+        if products:
+            return products[0]
+        else:
+            raise ValidationError(
+                u'%s:%s template has no variant set'
+                % (self.product_template_id.id, self.product_template_id.name)
+            )
+
diff --git a/compute_purchase_order/models/product_template.py b/compute_purchase_order/models/product_template.py
new file mode 100644
index 0000000..030719b
--- /dev/null
+++ b/compute_purchase_order/models/product_template.py
@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+from openerp import models, fields, api
+
+
+class ProductTemplate(models.Model):
+    _inherit = "product.template"
+
+    main_supplier_id = fields.Many2one(
+        'res.partner',
+        compute='_compute_main_supplier_id',
+        store=True
+    )
+
+    def _get_sorted_supplierinfo(self):
+        return self.seller_ids.sorted(
+            key=lambda seller: seller.date_start,
+            reverse=True)
+
+    @api.multi
+    @api.depends('seller_ids', 'seller_ids.date_start')
+    def _compute_main_supplier_id(self):
+        # Calcule le vendeur associé qui a la date de début la plus récente
+        # et plus petite qu’aujourd’hui
+        for pt in self:
+            sellers_ids = pt._get_sorted_supplierinfo()
+            pt.main_supplier_id = sellers_ids and sellers_ids[0].name or False
diff --git a/compute_purchase_order/models/purchase_order.py b/compute_purchase_order/models/purchase_order.py
new file mode 100644
index 0000000..24da3c6
--- /dev/null
+++ b/compute_purchase_order/models/purchase_order.py
@@ -0,0 +1,12 @@
+# -*- coding: utf-8 -*-
+from openerp import models, fields
+
+
+class PurchaseOrder(models.Model):
+    _inherit = "purchase.order"
+
+    original_cpo_id = fields.Many2one(
+        'computed.purchase.order',
+        string='Original CPO',
+        help='CPO used to generate this Purchase Order'
+    )
diff --git a/compute_purchase_order/security/ir.model.access.csv b/compute_purchase_order/security/ir.model.access.csv
new file mode 100644
index 0000000..faf22c8
--- /dev/null
+++ b/compute_purchase_order/security/ir.model.access.csv
@@ -0,0 +1,12 @@
+id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
+
+access_purchase_order,purchase.order,model_computed_purchase_order,purchase.group_purchase_user,1,1,1,1
+access_purchase_order_manager,purchase.order,model_computed_purchase_order,purchase.group_purchase_manager,1,1,1,1
+access_purchase_order_stock_worker,purchase.order,model_computed_purchase_order,stock.group_stock_user,1,0,0,0
+access_purchase_order_invoicing_payments,purchase.order,model_computed_purchase_order,account.group_account_invoice,1,1,0,0
+
+access_purchase_order_line,purchase.order.line user,model_computed_purchase_order_line,purchase.group_purchase_user,1,1,1,1
+access_purchase_order_line_manager,purchase.order.line manager,model_computed_purchase_order_line,purchase.group_purchase_manager,1,0,0,0
+access_purchase_order_line_stock_worker,purchase.order.line,model_computed_purchase_order_line,stock.group_stock_user,1,0,0,0
+access_purchase_order_line_manager,purchase.order.line,model_computed_purchase_order_line,purchase.group_purchase_manager,1,1,1,1
+access_purchase_order_line_invoicing_payments,purchase.order.line,model_computed_purchase_order_line,account.group_account_invoice,1,1,0,0
diff --git a/compute_purchase_order/views/computed_purchase_order.xml b/compute_purchase_order/views/computed_purchase_order.xml
new file mode 100644
index 0000000..10038e1
--- /dev/null
+++ b/compute_purchase_order/views/computed_purchase_order.xml
@@ -0,0 +1,115 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+  <!-- views-->
+
+    <!--tree-->
+  <record id="computed_purchase_order_tree" model="ir.ui.view">
+    <field name="name">computed.purchase.order.tree</field>
+    <field name="model">computed.purchase.order</field>
+    <field name="arch" type="xml">
+      <tree>
+        <field name="name"/>
+        <field name="supplier_id"/>
+        <field name="order_date"/>
+        <field name="date_planned"/>
+        <field name="total_amount"/>
+      </tree>
+    </field>
+  </record>
+
+    <!-- form -->
+  <record id="computed_purchase_order_form" model="ir.ui.view">
+    <field name="name">computed.purchase.order.form</field>
+    <field name="model">computed.purchase.order</field>
+    <field name="arch" type="xml">
+      <form>
+        <header>
+          <button type="object"
+                  name="create_purchase_order"
+                  string="Create Purchase Order"
+                  class="oe_highlight"/>
+        </header>
+
+        <sheet>
+          <group>
+            <group class="oe_left">
+              <field name="supplier_id" />
+              <field name="order_date" />
+              <field name="date_planned"/>
+              <field name="total_amount"/>
+              <field name="generated_purchase_order_ids" invisible='1'/>
+            </group>
+
+            <div name="buttons" class="oe_right oe_button_box">
+               <button class="oe_inline oe_stat_button"
+                       type="object"
+                       icon="fa-shopping-cart"
+                       name="get_generated_po_action"
+                       help="Generated Purchase Orders" >
+                 <field string="Purchase orders"
+                        name="generated_po_count"
+                        widget="statinfo"/>
+               </button>
+            </div>
+
+          </group>
+
+          <field name="order_line_ids" context="{'cpo_seller_id': supplier_id}">
+            <tree string="Order Lines" editable='bottom'>
+              <field name="product_template_id" domain="[('main_seller_id', '=', cpo_seller_id)]"/>
+              <field name="category_id" readonly='1'/>
+              <field name="qty_available" readonly='1'/>
+              <field name="uom_id" readonly='1'/>
+              <field name="average_consumption" readonly='1'/>
+              <field name="stock_coverage" readonly='1'/>
+              <field name="virtual_coverage" readonly='1'/>
+              <field name="product_price" readonly='1'/>
+              <field name="uom_po_id" readonly='1'/>
+              <field name="purchase_quantity"/>
+              <field name="subtotal" readonly='1'/>
+            </tree>
+          </field>
+        </sheet>
+
+
+      </form>
+    </field>
+  </record>
+
+  <!-- filters-->
+  <record id="computed_purchase_order_filter" model="ir.ui.view">
+    <field name="model">computed.purchase.order</field>
+    <field name="arch" type="xml">
+      <search>
+        <field name="supplier_id"/>
+      </search>
+    </field>
+  </record>
+
+  <!-- Menu item -->
+
+  <record id="action_computed_purchase_order" model="ir.actions.act_window">
+      <field name="name">Computed Purchase Orders</field>
+      <field name="type">ir.actions.act_window</field>
+      <field name="res_model">computed.purchase.order</field>
+      <field name="view_mode">tree,form</field>
+      <field name="view_id" eval="computed_purchase_order_tree"/>
+  </record>
+
+  <menuitem id="computed_purchase_order"
+    parent="purchase.menu_procurement_management"
+    action="action_computed_purchase_order"/>
+
+    <!-- Actions -->
+
+  <act_window id="action_view_form_computed_purchase_order"
+              name="Compute Purchase Order"
+              src_model="product.template"
+              res_model="computed.purchase.order"
+              view_mode="form"
+              view_id="computed_purchase_order_form"
+              target="current"
+              key2="client_action_multi"
+    />
+
+</odoo>
diff --git a/compute_purchase_order/views/product_template.xml b/compute_purchase_order/views/product_template.xml
new file mode 100644
index 0000000..c5607c8
--- /dev/null
+++ b/compute_purchase_order/views/product_template.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<odoo>
+  <record id="product_template_tree" model="ir.ui.view">
+      <field name="name">product.template.tree</field>
+      <field name="model">product.template</field>
+      <field eval="6" name="priority"/>
+      <!--<field name="inherit_id" ref="product.product_template_tree_view"/>-->
+      <field name="arch" type="xml">
+
+        <tree>
+          <field name="name"/>
+            <field name="ref interne"/>
+            <field name="supplier"/>
+          <field name="estimated_stock_coverage"/>
+            <field name="virtual_coverage"/>
+          <field name="categ_id"/>
+          <field name="qty_available"/>
+            <field name="expected quantity"/>
+        </tree>
+
+    </field>
+  </record>
+</odoo>
diff --git a/compute_purchase_order/views/purchase_order.xml b/compute_purchase_order/views/purchase_order.xml
new file mode 100644
index 0000000..75dc354
--- /dev/null
+++ b/compute_purchase_order/views/purchase_order.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+  <record id="view_purchase_order_form_inherit" model="ir.ui.view">
+    <field name="name">purchase.order.form.inherit</field>
+    <field name="model">purchase.order</field>
+    <field name="inherit_id" ref="purchase.purchase_order_form"/>
+    <field name="arch" type="xml">
+      <xpath expr="//field[@name='date_order']" position="after">
+        <field name="original_cpo_id" attrs="{'invisible': [('original_cpo_id','=',False)]}"/>
+      </xpath>
+    </field>
+  </record>
+</odoo>