from odoo import api, fields, models


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

    is_security_deposit = fields.Boolean(
        string="Is Security Deposit",
        default=False,
        help="Marks this line as a security deposit for a rental product.",
    )
    rental_deposit_source_line_id = fields.Many2one(
        'sale.order.line',
        string="Deposit For",
        ondelete='cascade',
        help="The rental product line this deposit is associated with.",
    )

    @api.model_create_multi
    def create(self, vals_list):
        lines = super().create(vals_list)
        deposit_vals = []
        for line in lines:
            if not line.is_rental or line.is_security_deposit:
                continue
            if not line.order_id.is_rental_order:
                continue
            deposit_amount = line.order_id._compute_deposit_amount_for_line(line)
            if deposit_amount <= 0:
                continue
            existing = line.order_id.order_line.filtered(
                lambda l: (
                    l.is_security_deposit
                    and l.rental_deposit_source_line_id == line
                )
            )
            if existing:
                continue
            deposit_product = line.order_id._get_deposit_product()
            deposit_vals.append({
                'order_id': line.order_id.id,
                'product_id': deposit_product.id,
                'product_uom_id': deposit_product.uom_id.id,
                'name': f"SECURITY DEPOSIT - REFUNDABLE - {line.product_id.display_name}",
                'product_uom_qty': 1,
                'price_unit': deposit_amount,
                'is_security_deposit': True,
                'rental_deposit_source_line_id': line.id,
            })
        if deposit_vals:
            super().create(deposit_vals)
        return lines

    def unlink(self):
        deposit_lines = self.env['sale.order.line']
        for line in self:
            if line.is_rental and not line.is_security_deposit:
                deposit_lines |= line.order_id.order_line.filtered(
                    lambda l: l.rental_deposit_source_line_id == line
                )
        if deposit_lines:
            deposit_lines.unlink()
        return super().unlink()