import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import { writeFileSync, mkdirSync, rmSync } from 'fs';
import { join } from 'path';
import { parseWorkflow, listJobs, pickJob, normalizeRunsOn } from '../src/parser.js';
const TMP = join(process.cwd(), 'tmp-test');
describe('parser', () => {
    beforeEach(() => {
        mkdirSync(TMP, { recursive: true });
    });
    afterEach(() => {
        rmSync(TMP, { recursive: true, force: true });
    });
    it('parses a basic workflow', () => {
        const path = join(TMP, 'workflow.yml');
        writeFileSync(path, `
name: Test Workflow
on: push
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - run: echo hello
`);
        const wf = parseWorkflow(path);
        expect(wf.name).toBe('Test Workflow');
        expect(wf.jobs.build['runs-on']).toBe('ubuntu-latest');
        expect(wf.jobs.build.steps).toHaveLength(1);
    });
    it('lists all jobs', () => {
        const path = join(TMP, 'workflow.yml');
        writeFileSync(path, `
name: Multi Job
on: push
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - run: echo build
  test:
    runs-on: ubuntu-latest
    steps:
      - run: echo test
`);
        const wf = parseWorkflow(path);
        const jobs = listJobs(wf);
        expect(jobs).toHaveLength(2);
        expect(jobs.map(j => j.name)).toEqual(['build', 'test']);
    });
    it('picks specified job', () => {
        const path = join(TMP, 'workflow.yml');
        writeFileSync(path, `
name: Multi Job
on: push
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - run: echo build
  test:
    runs-on: ubuntu-latest
    steps:
      - run: echo test
`);
        const wf = parseWorkflow(path);
        const picked = pickJob(wf, 'test');
        expect(picked.name).toBe('test');
    });
    it('picks first job when only one exists', () => {
        const path = join(TMP, 'workflow.yml');
        writeFileSync(path, `
name: Single Job
on: push
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - run: echo build
`);
        const wf = parseWorkflow(path);
        const picked = pickJob(wf);
        expect(picked.name).toBe('build');
    });
    it('throws when multiple jobs and no name given', () => {
        const path = join(TMP, 'workflow.yml');
        writeFileSync(path, `
name: Multi Job
on: push
jobs:
  a:
    runs-on: ubuntu-latest
    steps: []
  b:
    runs-on: ubuntu-latest
    steps: []
`);
        const wf = parseWorkflow(path);
        expect(() => pickJob(wf)).toThrow('Use --job');
    });
    it('throws on missing file', () => {
        expect(() => parseWorkflow(join(TMP, 'nonexistent.yml'))).toThrow();
    });
    it('normalizes runs-on values', () => {
        expect(normalizeRunsOn('ubuntu-latest')).toBe('node:20-slim');
        expect(normalizeRunsOn('ubuntu-22.04')).toBe('node:20-slim');
        expect(normalizeRunsOn('custom-image')).toBe('custom-image');
    });
});
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