Autonomous-Bug-Explorer/dist/plugins/collectors/PerformanceCollector.js

"use strict";
/**
 * PerformanceCollector — captures Navigation Timing and Core Web Vitals after each navigation.
 * Detects performance_degradation anomalies based on configurable thresholds.
 */
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    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
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      desc = { enumerable: true, get: function() { return m[k]; } };
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    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
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    Object.defineProperty(o, "default", { enumerable: true, value: v });
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    o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
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        return ownKeys(o);
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        __setModuleDefault(result, mod);
        return result;
    };
})();
Object.defineProperty(exports, "__esModule", { value: true });
exports.PerformanceCollector = exports.DEFAULT_PERF_CONFIG = void 0;
const crypto = __importStar(require("crypto"));
exports.DEFAULT_PERF_CONFIG = {
    enabled: true,
    lcpThresholdMs: 4000,
    clsThreshold: 0.25,
    inpThresholdMs: 500,
    ttfbThresholdMs: 1800,
};
class PerformanceCollector {
    constructor(config = {}) {
        this.metricsStore = [];
        this.config = { ...exports.DEFAULT_PERF_CONFIG, ...config };
    }
    async collect(page, stateId, sessionId, actionTrace) {
        if (!this.config.enabled) {
            const empty = {
                id: crypto.randomUUID(), sessionId, stateId, url: page.url(),
                ttfb: 0, domContentLoaded: 0, loadComplete: 0,
                lcp: null, cls: null, fid: null, inp: null,
                totalRequests: 0, failedRequests: 0, capturedAt: Date.now(),
            };
            return { metrics: empty, anomalies: [] };
        }
        // Capture Navigation Timing
        const timing = await page.evaluate(() => {
            const t = performance.timing;
            return {
                ttfb: t.responseStart - t.requestStart,
                domContentLoaded: t.domContentLoadedEventEnd - t.navigationStart,
                loadComplete: t.loadEventEnd - t.navigationStart,
            };
        }).catch(() => ({ ttfb: 0, domContentLoaded: 0, loadComplete: 0 }));
        // Capture Core Web Vitals via PerformanceObserver
        const vitals = await page.evaluate(() => {
            return new Promise((resolve) => {
                const result = {
                    lcp: null, cls: null, inp: null,
                };
                try {
                    // Try to observe LCP
                    if ('PerformanceObserver' in window) {
                        try {
                            const lcpObs = new PerformanceObserver((list) => {
                                const entries = list.getEntries();
                                if (entries.length > 0) {
                                    result.lcp = entries[entries.length - 1].startTime;
                                }
                            });
                            lcpObs.observe({ type: 'largest-contentful-paint', buffered: true });
                        }
                        catch { /* not supported */ }
                        try {
                            const clsObs = new PerformanceObserver((list) => {
                                let clsScore = 0;
                                for (const entry of list.getEntries()) {
                                    // eslint-disable-next-line @typescript-eslint/no-explicit-any
                                    clsScore += entry.value ?? 0;
                                }
                                result.cls = clsScore;
                            });
                            clsObs.observe({ type: 'layout-shift', buffered: true });
                        }
                        catch { /* not supported */ }
                    }
                }
                catch { /* ignore */ }
                // Resolve after short wait
                setTimeout(() => resolve(result), 500);
            });
        }).catch(() => ({ lcp: null, cls: null, inp: null }));
        const metrics = {
            id: crypto.randomUUID(),
            sessionId,
            stateId,
            url: page.url(),
            ttfb: timing.ttfb,
            domContentLoaded: timing.domContentLoaded,
            loadComplete: timing.loadComplete,
            lcp: vitals.lcp,
            cls: vitals.cls,
            fid: null,
            inp: vitals.inp,
            totalRequests: 0,
            failedRequests: 0,
            capturedAt: Date.now(),
        };
        this.metricsStore.push(metrics);
        const anomalies = this.detectAnomalies(metrics, stateId, actionTrace);
        return { metrics, anomalies };
    }
    getMetrics() {
        return this.metricsStore;
    }
    detectAnomalies(metrics, stateId, actionTrace) {
        const anomalies = [];
        const issues = [];
        let severityRank = 0; // 0=low,1=medium,2=high,3=critical
        if (metrics.lcp !== null && metrics.lcp > this.config.lcpThresholdMs) {
            issues.push(`LCP: ${metrics.lcp}ms (threshold: ${this.config.lcpThresholdMs}ms)`);
            if (severityRank < 2)
                severityRank = 2; // high
        }
        if (metrics.cls !== null && metrics.cls > this.config.clsThreshold) {
            issues.push(`CLS: ${metrics.cls.toFixed(3)} (threshold: ${this.config.clsThreshold})`);
            if (severityRank < 1)
                severityRank = 1; // medium
        }
        if (metrics.inp !== null && metrics.inp > this.config.inpThresholdMs) {
            issues.push(`INP: ${metrics.inp}ms (threshold: ${this.config.inpThresholdMs}ms)`);
            if (severityRank < 2)
                severityRank = 2; // high
        }
        if (metrics.ttfb > this.config.ttfbThresholdMs) {
            issues.push(`TTFB: ${metrics.ttfb}ms (threshold: ${this.config.ttfbThresholdMs}ms)`);
            if (severityRank < 1)
                severityRank = 1; // medium
        }
        const RANK_TO_SEVERITY = ['low', 'medium', 'high', 'critical'];
        const maxSeverity = RANK_TO_SEVERITY[severityRank] ?? 'low';
        if (issues.length === 0)
            return anomalies;
        anomalies.push({
            id: crypto.randomUUID(),
            type: 'performance_degradation',
            severity: maxSeverity,
            observationId: stateId,
            actionTrace,
            description: `Performance degradation at ${metrics.url}: ${issues[0]}`,
            evidence: {
                rawErrors: issues,
            },
            timestamp: Date.now(),
        });
        return anomalies;
    }
}
exports.PerformanceCollector = PerformanceCollector;