// engine/test-scaffold-generator/advanced-scaffold.ts — E2E, BDD, property-based, and load test scaffolds
// SPEC-018
import { toSnake } from './helpers.js';
// === E2E test scaffold ===
/**
 * Generate an E2E test scaffold (Playwright by default).
 */
export function generateE2ETestScaffold(specTitle, framework) {
    const ext = getFrameworkExt(framework);
    const runCommand = getFrameworkRunCommand(framework);
    return {
        filepath: `tests/e2e/${toSnake(specTitle)}.e2e.test.${ext}`,
        content: buildE2EContent(specTitle),
        framework,
        testType: 'e2e',
        runCommand,
    };
}
function getFrameworkExt(framework) {
    const extMap = {
        pytest: 'py',
        junit: 'java',
        xunit: 'cs',
        rspec: 'rb',
        'go-test': 'go',
    };
    return extMap[framework] ?? 'ts';
}
function getFrameworkRunCommand(framework) {
    const commandMap = {
        vitest: 'npx vitest run',
        jest: 'npx jest',
        mocha: 'npx mocha',
        pytest: 'python -m pytest',
        junit: 'mvn test',
        xunit: 'dotnet test',
        rspec: 'bundle exec rspec',
        'go-test': 'go test ./...',
    };
    return commandMap[framework];
}
function buildE2EContent(title) {
    return [
        "import { test, expect } from '@playwright/test';",
        '',
        `test.describe('${title} — E2E', () => {`,
        "  test('happy path: user completes primary flow', async ({ page }) => {",
        '    // TODO: navigate and assert',
        "    await page.goto('/');",
        '    await expect(page).toHaveTitle(/.+/);',
        '  });',
        '',
        "  test('error path: handles invalid input gracefully', async ({ page }) => {",
        '    // TODO: implement error path',
        "    await page.goto('/');",
        '    await expect(page).toHaveTitle(/.+/);',
        '  });',
        '});',
        '',
    ].join('\n');
}
// === BDD scaffold ===
/**
 * Generate a BDD scaffold with Gherkin feature file and step definitions.
 */
export function generateBDDScaffold(specTitle, criteria, bddFramework) {
    return {
        filepath: `features/${toSnake(specTitle)}.feature`,
        content: buildGherkinFeature(specTitle, criteria),
        framework: bddFramework,
        testType: 'e2e',
        runCommand: getBDDRunCommand(bddFramework),
    };
}
function buildGherkinFeature(title, criteria) {
    const happyPath = criteria[0] ?? 'user completes the action successfully';
    const errorPath = criteria[1] ?? 'invalid input is provided';
    const edgePath = criteria[2] ?? 'system is under load';
    return [
        `Feature: ${title}`,
        '  As a user',
        `  I want to ${title.toLowerCase()}`,
        '  So that I can achieve my goal',
        '',
        `  Scenario: Happy path — ${happyPath}`,
        '    Given the system is in a valid state',
        '    When the user performs the primary action',
        '    Then the expected outcome should occur',
        '',
        `  Scenario: Error path — ${errorPath}`,
        '    Given invalid input is provided',
        '    When the user submits the form',
        '    Then an error message should be displayed',
        '',
        '  @wip',
        `  Scenario: Edge case — ${edgePath}`,
        '    Given the system is under unusual conditions',
        '    When the user performs the action',
        '    Then the system should handle it gracefully',
        '',
    ].join('\n');
}
function getBDDRunCommand(framework) {
    const commands = {
        cucumber: 'npx cucumber-js',
        behave: 'behave features/',
        specflow: 'dotnet test',
        godog: 'go test ./features/...',
        gauge: 'gauge run specs/',
        jbehave: 'mvn test',
    };
    return commands[framework];
}
// === Property-based test scaffold ===
/**
 * Generate a property-based test scaffold.
 */
export function generatePropertyTestScaffold(specTitle, framework) {
    const ext = getFrameworkExt(framework);
    const runCommand = getFrameworkRunCommand(framework);
    return {
        filepath: `tests/property/${toSnake(specTitle)}.property.test.${ext}`,
        content: buildPropertyContent(specTitle, framework),
        framework,
        testType: 'property',
        runCommand,
    };
}
function buildPropertyContent(title, framework) {
    if (framework === 'pytest') {
        return buildHypothesisContent(title);
    }
    return buildFastCheckContent(title, framework);
}
function buildHypothesisContent(title) {
    const snake = toSnake(title);
    return [
        'from hypothesis import given, strategies as st',
        'import pytest',
        '',
        '',
        `@given(st.text())`,
        `def test_${snake}_round_trip(value: str) -> None:`,
        '    """Property: serialization round-trip should preserve value."""',
        '    # TODO: replace with actual serialize/deserialize calls',
        '    assert value == value',
        '',
        '',
        `@given(st.lists(st.integers()))`,
        `def test_${snake}_length_invariant(items: list[int]) -> None:`,
        '    """Property: processed list should maintain length."""',
        '    # TODO: replace with actual transformation',
        '    result = items',
        '    assert len(result) == len(items)',
        '',
    ].join('\n');
}
function buildFastCheckContent(title, framework) {
    const importLine = framework === 'vitest'
        ? "import { describe, it, expect } from 'vitest';\nimport * as fc from 'fast-check';"
        : "import { describe, it, expect } from '@jest/globals';\nimport * as fc from 'fast-check';";
    return [
        importLine,
        '',
        `describe('${title} — Property Tests', () => {`,
        "  it('round-trip: serialize(deserialize(x)) === x', () => {",
        '    fc.assert(',
        '      fc.property(fc.string(), (value) => {',
        '        // TODO: replace with actual serialize/deserialize',
        '        return value === value;',
        '      }),',
        '    );',
        '  });',
        '',
        "  it('length invariant: transform preserves length', () => {",
        '    fc.assert(',
        '      fc.property(fc.array(fc.integer()), (items) => {',
        '        const result = items; // TODO: replace with actual transform',
        '        return result.length === items.length;',
        '      }),',
        '    );',
        '  });',
        '});',
        '',
    ].join('\n');
}
// === Load test scaffold ===
/**
 * Generate a k6 load test scaffold (smoke test: 1 user, 10 requests).
 */
export function generateLoadTestScaffold(specTitle, endpoint) {
    return {
        filepath: `tests/load/${toSnake(specTitle)}.k6.js`,
        content: buildK6SmokeTest(specTitle, endpoint),
        framework: 'vitest', // placeholder — load tests run via k6, not vitest
        testType: 'load',
        runCommand: `k6 run tests/load/${toSnake(specTitle)}.k6.js`,
    };
}
function buildK6SmokeTest(title, endpoint) {
    return [
        `// k6 smoke test for: ${title}`,
        '// Generated by Planu SDD MCP Server',
        "import http from 'k6/http';",
        "import { check, sleep } from 'k6';",
        '',
        'export const options = {',
        '  vus: 1,',
        '  iterations: 10,',
        '  thresholds: {',
        "    http_req_duration: ['p(95)<500'],",
        "    http_req_failed: ['rate<0.01'],",
        '  },',
        '};',
        '',
        'export default function () {',
        `  const res = http.get('${endpoint}');`,
        '  check(res, {',
        "    'status is 200': (r) => r.status === 200,",
        "    'response time < 500ms': (r) => r.timings.duration < 500,",
        '  });',
        '  sleep(1);',
        '}',
        '',
    ].join('\n');
}
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