/**
 * Lighthouse CI Configuration
 *
 * Quality gates aligned with StellaOps advisory:
 * - Performance: >= 90
 * - Accessibility: >= 95
 * - Best Practices: >= 90
 * - SEO: >= 90
 */
module.exports = {
  ci: {
    collect: {
      staticDistDir: './dist/stella-ops-web/browser',
      numberOfRuns: 3,
      settings: {
        // Mobile-first testing
        formFactor: 'mobile',
        throttling: {
          rttMs: 150,
          throughputKbps: 1638.4,
          cpuSlowdownMultiplier: 4,
        },
        screenEmulation: {
          mobile: true,
          width: 375,
          height: 667,
          deviceScaleFactor: 2,
          disabled: false,
        },
        // Skip audits that don't apply to SPAs
        skipAudits: [
          'uses-http2', // Often depends on server config
          'redirects-http', // Handled by deployment
        ],
      },
    },
    assert: {
      preset: 'lighthouse:recommended',
      assertions: {
        // Performance budget
        'categories:performance': ['warn', { minScore: 0.9 }],
        'first-contentful-paint': ['warn', { maxNumericValue: 2000 }],
        'largest-contentful-paint': ['warn', { maxNumericValue: 2500 }],
        'cumulative-layout-shift': ['error', { maxNumericValue: 0.1 }],
        'total-blocking-time': ['warn', { maxNumericValue: 300 }],

        // Accessibility (strict - these are blocking)
        'categories:accessibility': ['error', { minScore: 0.95 }],
        'color-contrast': 'error',
        'document-title': 'error',
        'html-has-lang': 'error',
        'image-alt': 'error',
        'label': 'error',
        'link-name': 'error',
        'meta-viewport': 'error',
        'button-name': 'error',
        'aria-roles': 'error',
        'aria-valid-attr': 'error',
        'aria-valid-attr-value': 'error',

        // Best Practices
        'categories:best-practices': ['warn', { minScore: 0.9 }],
        'is-on-https': 'off', // Handled by deployment
        'no-vulnerable-libraries': 'error',

        // SEO
        'categories:seo': ['warn', { minScore: 0.9 }],
        'meta-description': 'warn',
        'robots-txt': 'off', // Handled by deployment
      },
    },
    upload: {
      target: 'filesystem',
      outputDir: './lighthouse-results',
      reportFilenamePattern: '%%PATHNAME%%-%%DATETIME%%-report.%%EXTENSION%%',
    },
  },
};