"""Test invoices using Form to emulate UI onchange behavior."""
from odoo.tests.common import Form
import json

results = []

def test_invoice(label, partner_vals, product_name, product_cat_xmlid, price=100.0):
    env.cr.execute("SAVEPOINT test")
    try:
        partner = env['res.partner'].search([('name', '=', partner_vals['name'])], limit=1)
        if not partner:
            partner = env['res.partner'].create(partner_vals)
        cat = env.ref(product_cat_xmlid)
        product = env['product.product'].search([('name', '=', product_name)], limit=1)
        if not product:
            product = env['product.product'].create({
                'name': product_name, 'type': 'service',
                'list_price': price, 'categ_id': cat.id,
            })
        with Form(env['account.move'].with_context(default_move_type='out_invoice')) as inv_form:
            inv_form.partner_id = partner
            with inv_form.invoice_line_ids.new() as line:
                line.product_id = product
                line.quantity = 1
                line.price_unit = price
        inv = inv_form.save()
        line = inv.invoice_line_ids[0]
        results.append({
            'label': label,
            'fiscal_position': inv.fiscal_position_id.name or '(none)',
            'taxes': line.tax_ids.mapped('name'),
            'income_account': f"{line.account_id.code} {line.account_id.name}",
            'subtotal': inv.amount_untaxed,
            'tax_total': inv.amount_tax,
            'total': inv.amount_total,
            'partner_tags': [c.name for c in partner.category_id],
        })
    finally:
        env.cr.execute("ROLLBACK TO SAVEPOINT test")

test_invoice("Ontario (HST 13%)",
    {'name': 'TEST CUST ON', 'country_id': env.ref('base.ca').id, 'state_id': env.ref('base.state_ca_on').id, 'customer_rank': 1},
    'TEST SaaS', 'nexa_coa_setup.pc_saas', 100.0)

test_invoice("US (Zero-rated)",
    {'name': 'TEST CUST US', 'country_id': env.ref('base.us').id, 'customer_rank': 1},
    'TEST SaaS', 'nexa_coa_setup.pc_saas', 100.0)

test_invoice("Quebec (GST+QST)",
    {'name': 'TEST CUST QC', 'country_id': env.ref('base.ca').id, 'state_id': env.ref('base.state_ca_qc').id, 'customer_rank': 1},
    'TEST SaaS', 'nexa_coa_setup.pc_saas', 100.0)

test_invoice("Intercompany -> Westin",
    {'name': 'Westin Healthcare Inc'},
    'TEST Consulting', 'nexa_coa_setup.pc_consulting', 150.0)

for r in results:
    print("---")
    print(json.dumps(r, indent=2, default=str))