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wrapper for @lhci/cli with fluent API.\n *\n * @module lighthouse\n * @author Miguel Colmenares \n * @license PolyForm-Noncommercial-1.0.0\n */\n\nimport type {\n LHCIAssertions,\n LHCIConfig,\n LHCIOptions,\n PerformanceThresholds,\n} from \"../types\";\n\n/**\n * Lighthouse CI Runner for programmatic execution\n */\nexport class LighthouseRunner {\n private config: LHCIConfig;\n\n /**\n * Creates a new Lighthouse runner\n * @param options - Runner options\n */\n constructor(options: LHCIOptions) {\n this.config = this.buildConfig(options);\n }\n\n /**\n * Builds LHCI configuration from options\n */\n private buildConfig(options: LHCIOptions): LHCIConfig {\n const {\n urls,\n method = \"node\",\n numberOfRuns = 3,\n psiApiKey,\n psiStrategy = \"mobile\",\n chromeFlags = [\"--headless\", \"--no-sandbox\"],\n outputDir,\n } = options;\n\n const config: LHCIConfig = {\n ci: {\n collect: {\n url: urls,\n method,\n numberOfRuns,\n ...(method === \"psi\" && psiApiKey ? { psiApiKey, psiStrategy } : {}),\n settings: {\n chromeFlags: method === \"node\" ? chromeFlags : undefined,\n preset: psiStrategy === \"desktop\" ? \"desktop\" : \"mobile\",\n },\n },\n },\n };\n\n if (outputDir) {\n config.ci.upload = {\n target: \"filesystem\",\n outputDir,\n };\n }\n\n return config;\n }\n\n /**\n * Gets the generated configuration\n * @returns LHCI configuration object\n */\n getConfig(): LHCIConfig {\n return this.config;\n }\n\n /**\n * Adds assertion thresholds to the configuration\n * @param thresholds - Performance thresholds to assert\n * @returns This runner instance for chaining\n */\n withAssertions(thresholds: PerformanceThresholds): this {\n const assertions: LHCIAssertions = {};\n\n if (thresholds.performance !== undefined) {\n assertions[\"categories:performance\"] = [\n \"error\",\n { minScore: thresholds.performance / 100 },\n ];\n }\n if (thresholds.accessibility !== undefined) {\n assertions[\"categories:accessibility\"] = [\n \"error\",\n { minScore: thresholds.accessibility / 100 },\n ];\n }\n if (thresholds.bestPractices !== undefined) {\n assertions[\"categories:best-practices\"] = [\n \"error\",\n { minScore: thresholds.bestPractices / 100 },\n ];\n }\n if (thresholds.seo !== undefined) {\n assertions[\"categories:seo\"] = [\n \"error\",\n { minScore: thresholds.seo / 100 },\n ];\n }\n if (thresholds.lcp !== undefined) {\n assertions[\"largest-contentful-paint\"] = [\n \"error\",\n { maxNumericValue: thresholds.lcp },\n ];\n }\n if (thresholds.fcp !== undefined) {\n assertions[\"first-contentful-paint\"] = [\n \"error\",\n { maxNumericValue: thresholds.fcp },\n ];\n }\n if (thresholds.cls !== undefined) {\n assertions[\"cumulative-layout-shift\"] = [\n \"error\",\n { maxNumericValue: thresholds.cls },\n ];\n }\n if (thresholds.tbt !== undefined) {\n assertions[\"total-blocking-time\"] = [\n \"error\",\n { maxNumericValue: thresholds.tbt },\n ];\n }\n\n this.config.ci.assert = { assertions };\n return this;\n }\n\n /**\n * Configures upload to temporary public storage\n * @returns This runner instance for chaining\n */\n withTemporaryStorage(): this {\n this.config.ci.upload = {\n target: \"temporary-public-storage\",\n };\n return this;\n }\n\n /**\n * Configures upload to LHCI server\n * @param serverBaseUrl - LHCI server URL\n * @param token - Build token\n * @returns This runner instance for chaining\n */\n withLHCIServer(serverBaseUrl: string, token: string): this {\n this.config.ci.upload = {\n target: \"lhci\",\n serverBaseUrl,\n token,\n };\n return this;\n }\n\n /**\n * Runs Lighthouse CI with the configured options\n * @returns Promise resolving to exit code (0 for success)\n */\n async run(): Promise {\n // Dynamic import to avoid requiring @lhci/cli at module load time\n try {\n const { autorun } = await import(\"@lhci/cli\");\n\n // Run with the ci config\n const result = await autorun(this.config.ci);\n return result.success ? 0 : 1;\n } catch (error) {\n if ((error as NodeJS.ErrnoException).code === \"MODULE_NOT_FOUND\") {\n throw new Error(\n \"Lighthouse CI (@lhci/cli) is not installed. \" +\n \"Install it with: npm install -D @lhci/cli\",\n );\n }\n throw error;\n }\n }\n\n /**\n * Generates a lighthouserc.js configuration file content\n * @returns Configuration file content as string\n */\n generateConfigFile(): string {\n const configContent = `/** @type {import('@lhci/cli').LighthouseConfig} */\nmodule.exports = ${JSON.stringify(this.config, null, 2)};\n`;\n return configContent;\n }\n}\n\n/**\n * Creates a Lighthouse runner for staging/internal URLs (uses local Chrome)\n * @param urls - URLs to analyze\n * @param options - Additional options\n * @returns Configured LighthouseRunner\n */\nexport function createNodeRunner(\n urls: string[],\n options: Partial> = {},\n): LighthouseRunner {\n return new LighthouseRunner({\n urls,\n method: \"node\",\n ...options,\n });\n}\n\n/**\n * Creates a Lighthouse runner for production URLs (uses PageSpeed API)\n * @param urls - URLs to analyze\n * @param psiApiKey - PageSpeed Insights API key\n * @param options - Additional options\n * @returns Configured LighthouseRunner\n */\nexport function createPSIRunner(\n urls: string[],\n psiApiKey: string,\n options: Partial> = {},\n): LighthouseRunner {\n return new LighthouseRunner({\n urls,\n method: \"psi\",\n psiApiKey,\n ...options,\n });\n}\n\n/**\n * Creates a hybrid runner that uses node for staging and PSI for production\n * @param config - Configuration with staging and production URLs\n * @returns Object with staging and production runners\n */\nexport function createHybridRunners(config: {\n stagingUrls: string[];\n productionUrls: string[];\n psiApiKey: string;\n thresholds?: PerformanceThresholds;\n}): {\n staging: LighthouseRunner;\n production: LighthouseRunner;\n} {\n const { stagingUrls, productionUrls, psiApiKey, thresholds } = config;\n\n const staging = createNodeRunner(stagingUrls);\n const production = createPSIRunner(productionUrls, psiApiKey);\n\n if (thresholds) {\n staging.withAssertions(thresholds);\n production.withAssertions(thresholds);\n }\n\n return { staging, production };\n}\n\n/**\n * Generates default performance thresholds based on Core Web Vitals\n * @param strict - 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