Investidor-V2/tests/frontend/iva-import-exemptions.test.mjs

import test from 'node:test';
import assert from 'node:assert/strict';
import fs from 'node:fs';
import {
    newImportExemption,
    evaluateImportExemption,
    recordImportExemptions,
    saveImportExemptionBook,
    importExemptionBook,
    importExemptionCurrent,
    importExemptionReportRows,
} from '../../resources/js/lib/iva-import-exemptions.ts';
import { salesCurrent } from '../../resources/js/lib/iva-operations.ts';
import { acquisitionCurrent } from '../../resources/js/lib/iva-acquisitions.ts';
import { createProjectDossierReport } from '../../resources/js/lib/project-dossier-report.ts';
const frozen = JSON.parse(
    fs.readFileSync(
        new URL('./fixtures/iva-g5b-inputs.json', import.meta.url),
        'utf8',
    ),
);
const row = (treatment = 'reimport_same_state') => ({
    ...newImportExemption('g6a-' + treatment, 'MZN'),
    treatment,
    description:
        treatment === 'reimport_same_state'
            ? 'SYNTHETIC QA equipamento reimportado'
            : 'SYNTHETIC QA ouro importado',
    period: '2026-12',
    declaredValue: '1000',
    importer:
        treatment === 'reimport_same_state'
            ? 'SYNTHETIC QA exportador original'
            : 'SYNTHETIC QA Banco de Moçambique',
    documentRef: 'SYNTHETIC QA G6A ' + treatment,
    documentDate: '2026-12-11',
    evidence: 'SYNTHETIC QA pressupostos expressos; não é documento real',
    conditions: {
        sameExporter: 'yes',
        sameState: 'yes',
        customsExempt: 'yes',
        gold: 'yes',
        centralBank: 'yes',
    },
});
const draft = () => ({
    ...structuredClone(frozen),
    context_opportunity: 'opportunity:330',
    project_title: 'SYNTHETIC QA — G6A / Importações',
});

void test('P049 requires all three own conditions;unknown differs from failed and neither produces normal tax or exempt zero', () => {
    const input = row();
    assert.equal(evaluateImportExemption(input, 'MZN').importVat, '0.00');
    for (const key of ['sameExporter', 'sameState', 'customsExempt'])
        for (const value of ['', 'no', 'unknown']) {
            const result = evaluateImportExemption(
                { ...input, conditions: { ...input.conditions, [key]: value } },
                'MZN',
            );
            assert.equal(
                result.status,
                value === 'no' ? 'not_applicable' : 'indeterminate',
            );
            assert.equal(result.importVat, null);
        }
    for (const patch of [
        { period: '2025-12' },
        { currency: 'USD' },
        { documentDate: '2026-02-30' },
        { documentRef: '' },
        { evidence: '' },
        { declaredValue: '-1' },
        { origin: 'unknown' },
        { treatment: 'unknown' },
    ])
        assert.equal(
            evaluateImportExemption({ ...input, ...patch }, 'MZN').importVat,
            null,
        );
    assert.equal(
        evaluateImportExemption(
            { ...input, documentDate: '2026-11-11', declaredValue: '' },
            'MZN',
        ).importVat,
        '0.00',
    );
    assert.deepEqual(input, row());
    assert.equal(evaluateImportExemption(input, 'USD').importVat, null);
});

void test('P051 uses gold and actual central-bank importer;does not import reimport conditions or unworked-form restriction from domestic sales', () => {
    const input = {
        ...row('central_bank_gold'),
        description:
            'SYNTHETIC QA ouro trabalhado; classificação de importação',
        conditions: { gold: 'yes', centralBank: 'yes' },
    };
    assert.equal(evaluateImportExemption(input, 'MZN').status, 'exempt');
    for (const key of ['gold', 'centralBank']) {
        assert.equal(
            evaluateImportExemption(
                { ...input, conditions: { ...input.conditions, [key]: '' } },
                'MZN',
            ).status,
            'indeterminate',
        );
        assert.equal(
            evaluateImportExemption(
                { ...input, conditions: { ...input.conditions, [key]: 'no' } },
                'MZN',
            ).status,
            'not_applicable',
        );
    }
    assert.equal(
        evaluateImportExemption(
            {
                ...input,
                conditions: { ...input.conditions, customsExempt: 'no' },
            },
            'MZN',
        ).importVat,
        '0.00',
    );
});

void test('explicit classification archives prior inputs/results;editing currency,opportunity,location or conditions marks result historical', () => {
    const d = draft();
    let book = recordImportExemptions(d, {
        rows: [
            { ...row(), conditions: { sameExporter: 'yes', sameState: 'yes' } },
        ],
    });
    assert.equal(book.result.rows[0].importVat, null);
    const original = structuredClone(book);
    book = recordImportExemptions(d, { ...book, rows: [row()] });
    assert.deepEqual(book.history, [original.result]);
    assert.ok(importExemptionCurrent(d, book));
    for (const patch of [
        { currency: 'USD' },
        { context_opportunity: 'opportunity:331' },
        { selection_labels: { province_id: 'Maputo' } },
    ])
        assert.ok(!importExemptionCurrent({ ...d, ...patch }, book));
    assert.ok(
        !importExemptionCurrent(d, {
            ...book,
            rows: [
                {
                    ...row(),
                    conditions: { ...row().conditions, sameState: 'no' },
                },
            ],
        }),
    );
    assert.throws(
        () => recordImportExemptions(d, { rows: [row(), row()] }),
        /distintos/,
    );
});

void test('save/recovery/report preserve20sales and acceptedP086 purchase;classifying import leaves all ModeloA fields untouched', () => {
    const d = draft(),
        prior = JSON.parse(d.modelo_a_snapshot);
    let book = recordImportExemptions(d, {
        rows: [row(), row('central_bank_gold')],
    });
    d.modelo_a_snapshot = saveImportExemptionBook(d, book);
    assert.deepEqual(importExemptionBook(JSON.parse(JSON.stringify(d))), book);
    const next = JSON.parse(d.modelo_a_snapshot);
    assert.deepEqual(next.salesOperations, prior.salesOperations);
    assert.deepEqual(next.books, prior.books);
    for (const [scope, sales] of Object.entries(next.salesOperations))
        assert.ok(salesCurrent({ ...d, context_opportunity: scope }, sales));
    assert.ok(
        acquisitionCurrent(
            { ...d, context_opportunity: 'opportunity:329' },
            next.books['opportunity:329'],
        ),
    );
    const report = JSON.stringify(
        createProjectDossierReport(d, {
            selectedSections: new Set(['finance']),
            version: 'QA G6A',
        }),
    );
    for (const token of [
        'P049',
        'P051',
        '2026-12',
        'opportunity:330',
        'Manica',
        'SYNTHETIC QA G6A',
        '0.00',
        '12(1)(d/f)',
        'campo11',
        'sem fixar base aduaneira',
    ])
        assert.ok(report.includes(token), token);
    assert.equal(
        importExemptionReportRows({
            ...d,
            context_opportunity: 'opportunity:331',
        }).length,
        0,
    );
    if (process.env.IVA_G6A_CALCULATED)
        fs.writeFileSync(process.env.IVA_G6A_CALCULATED, JSON.stringify(d));
});

void test('old snapshots need no import book;corrupt import data cannot erase originals', () => {
    assert.deepEqual(importExemptionBook(draft()), { rows: [] });
    const d = draft(),
        data = JSON.parse(d.modelo_a_snapshot);
    data.importExemptions = [];
    d.modelo_a_snapshot = JSON.stringify(data);
    const original = d.modelo_a_snapshot;
    assert.throws(() => importExemptionBook(d), /preservados/);
    assert.equal(d.modelo_a_snapshot, original);
});