import { readFileSync } from 'fs';
import { resolve } from 'path';
import yaml from 'js-yaml';
export function parseWorkflow(filePath) {
    const fullPath = resolve(filePath);
    const content = readFileSync(fullPath, 'utf-8');
    const parsed = yaml.load(content);
    if (!parsed || typeof parsed !== 'object') {
        throw new Error(`Invalid YAML in ${filePath}: not an object`);
    }
    if (!parsed.jobs || typeof parsed.jobs !== 'object') {
        throw new Error(`Invalid workflow in ${filePath}: missing 'jobs' field`);
    }
    return parsed;
}
export function listJobs(workflow) {
    return Object.entries(workflow.jobs).map(([name, job]) => ({ name, job }));
}
export function pickJob(workflow, jobName) {
    const jobs = listJobs(workflow);
    if (jobs.length === 0) {
        throw new Error('Workflow has no jobs');
    }
    if (jobName) {
        const found = jobs.find(j => j.name === jobName);
        if (!found) {
            throw new Error(`Job "${jobName}" not found. Available: ${jobs.map(j => j.name).join(', ')}`);
        }
        return found;
    }
    // Return first job if only one exists
    if (jobs.length === 1) {
        return jobs[0];
    }
    throw new Error(`Multiple jobs found: ${jobs.map(j => j.name).join(', ')}. Use --job to specify one.`);
}
export function normalizeRunsOn(runsOn) {
    const mapping = {
        'ubuntu-latest': 'node:20-slim',
        'ubuntu-24.04': 'node:20-slim',
        'ubuntu-22.04': 'node:20-slim',
        'ubuntu-20.04': 'node:18-slim',
        'node-latest': 'node:22-slim',
        'node-20': 'node:20-slim',
        'node-18': 'node:18-slim',
    };
    return mapping[runsOn] ?? runsOn;
}
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