Odoo 19 Rental Management:
Fleet, Equipment & Subscription Billing

from odoo import fields, models


class ProductTemplate(models.Model):
    _inherit = "product.template"

    rent_ok = fields.Boolean(
        string="Can be Rented",
        default=False,
        help="Enable rental workflow for this product. "
             "Adds rental pricing and availability tracking.",
    )
    rental_tracking = fields.Selection(
        [("no", "No Tracking"),
         ("serial", "By Unique Serial Number"),
         ("lot", "By Lot / Batch")],
        string="Rental Tracking",
        default="serial",
        help="Serial: each unit tracked individually (forklifts, vehicles). "
             "Lot: units are interchangeable (folding chairs, barriers).",
    )

from odoo import fields, models, api


class RentalPickupWizard(models.TransientModel):
    _name = "rental.pickup.wizard"
    _description = "Rental Equipment Pickup"

    order_id = fields.Many2one("sale.order", required=True)
    pickup_date = fields.Datetime(
        default=fields.Datetime.now,
    )
    condition_notes = fields.Text(
        string="Condition at Pickup",
        help="Document scratches, dents, fuel level, "
             "mileage. Attach photos via chatter.",
    )
    deposit_amount = fields.Monetary(
        string="Damage Deposit",
        currency_field="currency_id",
    )
    currency_id = fields.Many2one(
        related="order_id.currency_id",
    )

    def action_confirm_pickup(self):
        """Validate delivery, record condition, create deposit invoice."""
        self.ensure_one()
        order = self.order_id

        # Validate the outgoing delivery
        for picking in order.picking_ids.filtered(
            lambda p: p.picking_type_code == "outgoing"
            and p.state not in ("done", "cancel")
        ):
            picking.action_assign()
            picking.button_validate()

        # Log condition in chatter
        order.message_post(
            body=f"Pickup completed. Condition: "
                 f"{self.condition_notes or 'No issues noted'}",
            message_type="comment",
        )

        # Create damage deposit invoice if amount > 0
        if self.deposit_amount:
            self._create_deposit_invoice()

        return {"type": "ir.actions.act_window_close"}

    def _create_deposit_invoice(self):
        deposit_product = self.env.ref(
            "sale_rental.product_rental_deposit"
        )
        invoice_vals = {
            "move_type": "out_invoice",
            "partner_id": self.order_id.partner_id.id,
            "invoice_origin": self.order_id.name,
            "invoice_line_ids": [(0, 0, {
                "product_id": deposit_product.id,
                "name": f"Damage deposit: "
                        f"{self.order_id.name}",
                "quantity": 1,
                "price_unit": self.deposit_amount,
            })],
        }
        self.env["account.move"].create(invoice_vals)

from odoo import fields, models


class SaleOrderLine(models.Model):
    _inherit = "sale.order.line"

    def action_convert_rental_to_purchase(self):
        """Convert an active rental line to a purchase.

        Credits rental payments already made against
        the purchase price of the product.
        """
        self.ensure_one()
        product = self.product_id
        purchase_price = product.list_price

        # Calculate total rental payments made
        rental_paid = sum(
            inv_line.price_subtotal
            for inv_line in self.invoice_lines
            if inv_line.move_id.state == "posted"
        )

        # Remaining balance after rental credit
        remaining = max(purchase_price - rental_paid, 0)

        # Create a new sale order for the purchase
        purchase_so = self.env["sale.order"].create({
            "partner_id": self.order_id.partner_id.id,
            "origin": f"Rental conversion: "
                      f"{self.order_id.name}",
            "order_line": [(0, 0, {
                "product_id": product.id,
                "product_uom_qty": 1,
                "price_unit": remaining,
                "name": f"{product.name} "
                        f"(Purchase - rental credit "
                        f"of {rental_paid:.2f} applied)",
            })],
        })

        # Close the rental by marking as returned
        self._action_force_return()

        return {
            "type": "ir.actions.act_window",
            "res_model": "sale.order",
            "res_id": purchase_so.id,
            "view_mode": "form",
        }