# POS Loyalty Discount Before Tax

This module modifies the loyalty reward discount calculation in POS to apply discounts before tax calculation and ensures that discount values are displayed as tax-exclusive in both the POS receipt and accounting entries.

## Features

1. **Discount Calculation Before Tax**: All loyalty rewards are calculated on the tax-exclusive amount rather than the tax-inclusive amount.

2. **Tax-Exclusive Display**: Discount values are displayed as tax-exclusive in the POS receipt.

3. **Proper Accounting Entries**: Accounting entries are created with tax only on the credit side, ensuring compliance with accounting standards.

## Technical Changes

### JavaScript Changes

- Modified `static/src/overrides/models/loyalty.js` to calculate discounts on tax-exclusive amounts
- Ensured discount line values are tax-exclusive for display purposes

### Backend Changes

- Created `models/pos_order.py` to handle accounting entries for loyalty discounts
- Created `models/loyalty_reward.py` to ensure discount products are properly configured
- Created `models/account_move.py` to ensure discount lines in account moves are tax-exclusive
- Created `models/pos_session.py` to handle session-level accounting for loyalty discounts

## Installation

1. Copy the module to your Odoo addons directory
2. Update the apps list in Odoo
3. Install the "POS Loyalty Discount Before Tax" module

## Configuration

No additional configuration is required. The module automatically applies the changes to all loyalty programs in POS.

## Usage

The module works automatically with all existing loyalty programs. Discounts will be calculated on tax-exclusive amounts and displayed as such in the POS interface and accounting entries.

## Compatibility

This module is compatible with Odoo 17 and requires the following modules:
- point_of_sale
- pos_loyalty

## License

LGPL-3