import { Panel } from './Panel';
import { mlWorker } from '@/services/ml-worker';
import { generateSummary, type SummarizeOptions } from '@/services/summarization';
import { parallelAnalysis, type AnalyzedHeadline } from '@/services/parallel-analysis';
import { signalAggregator, type RegionalConvergence } from '@/services/signal-aggregator';
import { focalPointDetector } from '@/services/focal-point-detector';
import { stripOrefLabels } from '@/services/oref-alerts';
import { ingestNewsForCII, getCountryScore } from '@/services/country-instability';
import { getTheaterPostureSummaries } from '@/services/military-surge';
import { getCachedPosture } from '@/services/cached-theater-posture';
import { isMobileDevice } from '@/utils';
import { escapeHtml, sanitizeUrl } from '@/utils/sanitize';
import { SITE_VARIANT } from '@/config';
import { deletePersistentCache, getPersistentCache, setPersistentCache } from '@/services/persistent-cache';
import { t } from '@/services/i18n';
import { isDesktopRuntime } from '@/services/runtime';
import { getAiFlowSettings, isAnyAiProviderEnabled, subscribeAiFlowChange } from '@/services/ai-flow-settings';
import { getActiveFrameworkForPanel, subscribeFrameworkChange } from '@/services/analysis-framework-store';
import { hasPremiumAccess } from '@/services/panel-gating';
import { FrameworkSelector } from './FrameworkSelector';
import { getServerInsights, type ServerInsights, type ServerInsightStory } from '@/services/insights-loader';
import { computeISQ, type SignalQuality, type SignalQualityInput } from '@/utils/signal-quality';
import { extractEntitiesFromTitle } from '@/services/entity-extraction';
import { getEntityIndex } from '@/services/entity-index';

import type { ClusteredEvent, FocalPoint, MilitaryFlight } from '@/types';

export class InsightsPanel extends Panel {
  private lastBriefUpdate = 0;
  private cachedBrief: string | null = null;
  private lastMissedStories: AnalyzedHeadline[] = [];
  private lastConvergenceZones: RegionalConvergence[] = [];
  private lastFocalPoints: FocalPoint[] = [];
  private lastMilitaryFlights: MilitaryFlight[] = [];
  private lastClusters: ClusteredEvent[] = [];
  private aiFlowUnsubscribe: (() => void) | null = null;
  private frameworkUnsubscribe: (() => void) | null = null;
  private fwSelector: FrameworkSelector | null = null;
  private updateGeneration = 0;
  private static readonly BRIEF_COOLDOWN_MS = 120000; // 2 min cooldown (API has limits)
  private static readonly BRIEF_CACHE_KEY = 'summary:world-brief';

  constructor() {
    super({
      id: 'insights',
      title: t('panels.insights'),
      showCount: false,
      infoTooltip: t('components.insights.infoTooltip'),
    });

    // Web-only: subscribe to AI flow changes so toggling providers re-runs analysis
    // Skip on mobile — only server-side insights are used there (no client-side AI)
    if (!isDesktopRuntime() && !isMobileDevice()) {
      this.aiFlowUnsubscribe = subscribeAiFlowChange((changedKey) => {
        if (changedKey === 'mapNewsFlash') return;
        void this.onAiFlowChanged();
      });
    }

    this.frameworkUnsubscribe = subscribeFrameworkChange('insights', () => {
      void this.updateInsights(this.lastClusters);
    });

    this.fwSelector = new FrameworkSelector({ panelId: 'insights', isPremium: hasPremiumAccess(), panel: this, note: 'Applies to client-generated analysis only' });
    this.header.appendChild(this.fwSelector.el);
  }

  public setMilitaryFlights(flights: MilitaryFlight[]): void {
    this.lastMilitaryFlights = flights;
  }

  private getTheaterPostureContext(): string {
    const cachedPostures = getCachedPosture()?.postures;
    const postures = cachedPostures?.length
      ? cachedPostures
      : (this.lastMilitaryFlights.length > 0 ? getTheaterPostureSummaries(this.lastMilitaryFlights) : []);

    const significant = postures.filter(
      (p) => p.postureLevel === 'critical' || p.postureLevel === 'elevated' || p.strikeCapable
    );

    if (significant.length === 0) {
      return '';
    }

    const lines = significant.map((p) => {
      const parts: string[] = [];
      parts.push(`${p.theaterName}: ${p.totalAircraft} aircraft`);
      parts.push(`(${p.postureLevel.toUpperCase()})`);
      if (p.strikeCapable) parts.push('STRIKE CAPABLE');
      parts.push(`- ${p.summary}`);
      if (p.targetNation) parts.push(`Focus: ${p.targetNation}`);
      return parts.join(' ');
    });

    return `\n\nCRITICAL MILITARY POSTURE:\n${lines.join('\n')}`;
  }


  private async loadBriefFromCache(): Promise<boolean> {
    if (this.cachedBrief) return false;
    const entry = await getPersistentCache<{ summary: string }>(InsightsPanel.BRIEF_CACHE_KEY);
    if (!entry?.data?.summary) return false;
    this.cachedBrief = entry.data.summary;
    this.lastBriefUpdate = entry.updatedAt;
    return true;
  }

  private extractISQInput(cluster: ClusteredEvent): SignalQualityInput {
    const entities = extractEntitiesFromTitle(cluster.primaryTitle);
    const idx = getEntityIndex();
    // Keyword matches (confidence 0.7) are ambiguous for shared-actor terms like
    // "hezbollah" (→ IR + IL) or "hamas" (→ IL + QA). Only trust alias matches
    // (direct country name mention, confidence ≥ 0.85) for ISQ country attribution.
    const countryEntity = entities.find(
      e => e.matchType === 'alias' && idx.byId.get(e.entityId)?.type === 'country'
    );
    return {
      sourceCount: cluster.sourceCount,
      isAlert: cluster.isAlert,
      sourceTier: cluster.topSources?.[0]?.tier ?? undefined,
      threatLevel: cluster.threat?.level ?? undefined,
      velocity: cluster.velocity ?? undefined,
      countryCode: countryEntity?.entityId ?? null,
    };
  }

  private selectTopStories(
    clusters: ClusteredEvent[],
    maxCount: number,
    focalFn: (code: string) => { focalScore: number; urgency: string } | null,
    ciiFn: (code: string) => number | null,
    isFocalReadyFn: () => boolean,
  ): Array<{ cluster: ClusteredEvent; isq: SignalQuality }> {
    const allScored = clusters.map(c => ({
      cluster: c,
      isq: computeISQ(this.extractISQInput(c), focalFn, ciiFn, isFocalReadyFn),
    }));

    const candidates = allScored.filter(({ cluster: c, isq }) =>
      c.sourceCount >= 2 ||
      c.isAlert ||
      (c.velocity && c.velocity.level !== 'normal') ||
      isq.composite > 0.55 ||
      isq.tier === 'strong'
    );

    const sorted = candidates.sort((a, b) => b.isq.composite - a.isq.composite);

    const selected: Array<{ cluster: ClusteredEvent; isq: SignalQuality }> = [];
    const sourceCount = new Map<string, number>();
    const MAX_PER_SOURCE = 3;

    for (const item of sorted) {
      const source = item.cluster.primarySource;
      const count = sourceCount.get(source) ?? 0;
      if (count < MAX_PER_SOURCE) {
        selected.push(item);
        sourceCount.set(source, count + 1);
      }
      if (selected.length >= maxCount) break;
    }

    return selected;
  }

  private setProgress(step: number, total: number, message: string): void {
    const percent = Math.round((step / total) * 100);
    this.setContent(`
      <div class="insights-progress">
        <div class="insights-progress-bar">
          <div class="insights-progress-fill" style="width: ${percent}%"></div>
        </div>
        <div class="insights-progress-info">
          <span class="insights-progress-step">${t('components.insights.step', { step: String(step), total: String(total) })}</span>
          <span class="insights-progress-message">${message}</span>
        </div>
      </div>
    `);
  }

  public async updateInsights(clusters: ClusteredEvent[]): Promise<void> {
    this.lastClusters = clusters;
    this.updateGeneration++;
    const thisGeneration = this.updateGeneration;

    // Try server-side pre-computed insights first (instant, works even without clusters)
    const serverInsights = getServerInsights();
    if (serverInsights) {
      await this.updateFromServer(serverInsights, clusters, thisGeneration);
      return;
    }

    if (clusters.length === 0) {
      this.setDataBadge('unavailable');
      this.setContent(`<div class="insights-empty">${t('components.insights.waitingForData')}</div>`);
      return;
    }

    // Fallback: full client-side pipeline (skip on mobile — too heavy)
    if (isMobileDevice()) {
      this.setDataBadge('unavailable');
      this.setContent(`<div class="insights-empty">${t('components.insights.waitingForData')}</div>`);
      return;
    }
    await this.updateFromClient(clusters, thisGeneration);
  }

  private async updateFromServer(
    serverInsights: ServerInsights,
    clusters: ClusteredEvent[],
    thisGeneration: number,
  ): Promise<void> {
    const totalSteps = 2;

    try {
      // Clear stale ML-detected stories when clusters are empty (e.g. clustering
      // failed) so unrelated missed stories don't render next to server insights
      if (clusters.length === 0) {
        this.lastMissedStories = [];
      }

      // Step 1: Signal aggregation (client-side, depends on real-time map data)
      this.setProgress(1, totalSteps, 'Loading server insights...');

      let signalSummary: ReturnType<typeof signalAggregator.getSummary>;
      let focalSummary: ReturnType<typeof focalPointDetector.analyze>;

      if (SITE_VARIANT === 'full') {
        const _cp = getCachedPosture()?.postures;
        const theaterPostures = _cp?.length
          ? _cp
          : (this.lastMilitaryFlights.length > 0 ? getTheaterPostureSummaries(this.lastMilitaryFlights) : []);
        if (theaterPostures.length > 0) {
          signalAggregator.ingestTheaterPostures(theaterPostures);
        }
        signalSummary = signalAggregator.getSummary();
        this.lastConvergenceZones = signalSummary.convergenceZones;
        focalSummary = focalPointDetector.analyze(clusters, signalSummary);
        this.lastFocalPoints = focalSummary.focalPoints;
        if (focalSummary.focalPoints.length > 0) {
          ingestNewsForCII(clusters);
          window.dispatchEvent(new CustomEvent('focal-points-ready'));
        }
      } else {
        this.lastConvergenceZones = [];
        this.lastFocalPoints = [];
      }

      if (this.updateGeneration !== thisGeneration) return;

      // Step 2: Re-sort server stories by ISQ (shallow copy to avoid mutating cache)
      this.setProgress(2, totalSteps, t('components.insights.analyzingSentiment'));
      const focalFnServer = (code: string) => {
        const fp = focalPointDetector.getFocalPointForCountry(code);
        return (fp && (fp.signalCount > 0 || fp.signalTypes.includes('active_strike'))) ? fp : null;
      };
      const isFocalReadyServer = () => (focalPointDetector.getLastSummary()?.topCountries.some(
        fp => fp.signalCount > 0 || fp.signalTypes.includes('active_strike')
      ) ?? false);
      const sortedStories = [...serverInsights.topStories].sort((a, b) => {
        const isqA = computeISQ(
          { sourceCount: a.sourceCount, isAlert: a.isAlert, threatLevel: a.threatLevel ?? undefined, countryCode: a.countryCode, velocity: a.velocity },
          focalFnServer, getCountryScore, isFocalReadyServer,
        );
        const isqB = computeISQ(
          { sourceCount: b.sourceCount, isAlert: b.isAlert, threatLevel: b.threatLevel ?? undefined, countryCode: b.countryCode, velocity: b.velocity },
          focalFnServer, getCountryScore, isFocalReadyServer,
        );
        return isqB.composite - isqA.composite;
      });

      // Sentiment classification uses positional indexing — must happen AFTER re-sort
      const titles = sortedStories.slice(0, 5).map(s => s.primaryTitle);
      let sentiments: Array<{ label: string; score: number }> | null = null;
      if (mlWorker.isAvailable) {
        sentiments = await mlWorker.classifySentiment(titles).catch(() => null);
      }

      if (this.updateGeneration !== thisGeneration) return;

      this.setDataBadge('live');
      this.renderServerInsights({ ...serverInsights, topStories: sortedStories }, sentiments);
    } catch (error) {
      console.error('[InsightsPanel] Server path error, falling back:', error);
      await this.updateFromClient(clusters, thisGeneration);
    }
  }

  private async updateFromClient(clusters: ClusteredEvent[], thisGeneration: number): Promise<void> {
    // Web-only: if no AI providers enabled, show disabled state
    if (!isDesktopRuntime() && !isAnyAiProviderEnabled()) {
      this.setDataBadge('unavailable');
      this.renderDisabledState();
      return;
    }

    // Build summarize options from AI flow settings (web) or defaults (desktop)
    const aiFlow = isDesktopRuntime() ? { cloudLlm: true, browserModel: true } : getAiFlowSettings();
    const summarizeOpts: SummarizeOptions = {
      skipCloudProviders: !aiFlow.cloudLlm,
      skipBrowserFallback: !aiFlow.browserModel,
    };

    const totalSteps = 4;

    try {
      // Step 1: Signal aggregation + focal point detection (must run BEFORE ranking)
      this.setProgress(1, totalSteps, t('components.insights.rankingStories'));

      // Run parallel multi-perspective analysis in background
      const parallelPromise = parallelAnalysis.analyzeHeadlines(clusters).then(report => {
        this.lastMissedStories = report.missedByKeywords;
      }).catch(err => {
        console.warn('[ParallelAnalysis] Error:', err);
      });

      let signalSummary: ReturnType<typeof signalAggregator.getSummary>;
      let focalSummary: ReturnType<typeof focalPointDetector.analyze>;

      if (SITE_VARIANT === 'full') {
        const _cp = getCachedPosture()?.postures;
        const theaterPostures = _cp?.length
          ? _cp
          : (this.lastMilitaryFlights.length > 0 ? getTheaterPostureSummaries(this.lastMilitaryFlights) : []);
        if (theaterPostures.length > 0) {
          signalAggregator.ingestTheaterPostures(theaterPostures);
        }
        signalSummary = signalAggregator.getSummary();
        this.lastConvergenceZones = signalSummary.convergenceZones;
        focalSummary = focalPointDetector.analyze(clusters, signalSummary);
        this.lastFocalPoints = focalSummary.focalPoints;
        if (focalSummary.focalPoints.length > 0) {
          ingestNewsForCII(clusters);
          window.dispatchEvent(new CustomEvent('focal-points-ready'));
        }
      } else {
        signalSummary = {
          timestamp: new Date(),
          totalSignals: 0,
          byType: {} as Record<string, number>,
          convergenceZones: [],
          topCountries: [],
          aiContext: '',
        };
        focalSummary = {
          focalPoints: [],
          aiContext: '',
          timestamp: new Date(),
          topCountries: [],
          topCompanies: [],
        };
        this.lastConvergenceZones = [];
        this.lastFocalPoints = [];
      }

      // Rank stories with fresh focal + CII context
      const focalFn = (code: string) => {
        const fp = focalPointDetector.getFocalPointForCountry(code);
        return (fp && (fp.signalCount > 0 || fp.signalTypes.includes('active_strike'))) ? fp : null;
      };
      const isFocalReady = () => (focalPointDetector.getLastSummary()?.topCountries.some(
        fp => fp.signalCount > 0 || fp.signalTypes.includes('active_strike')
      ) ?? false);
      const importantItems = this.selectTopStories(clusters, 8, focalFn, getCountryScore, isFocalReady);
      const importantClusters = importantItems.map(({ cluster }) => cluster);

      if (importantClusters.length === 0) {
        this.setContent(`<div class="insights-empty">${t('components.insights.noStories')}</div>`);
        return;
      }

      // Cap titles sent to AI at 5 to reduce entity conflation in small models
      // Strip OREF translation labels (ALERT[id]:, AREAS[id]:) that may leak into cluster titles
      const titles = importantClusters.slice(0, 5).map(c => stripOrefLabels(c.primaryTitle));

      // Step 2: Analyze sentiment (browser-based, fast)
      this.setProgress(2, totalSteps, t('components.insights.analyzingSentiment'));
      let sentiments: Array<{ label: string; score: number }> | null = null;

      if (mlWorker.isAvailable) {
        sentiments = await mlWorker.classifySentiment(titles).catch(() => null);
      }
      if (this.updateGeneration !== thisGeneration) return;

      // Step 3: Generate World Brief (with cooldown)
      await this.loadBriefFromCache();
      if (this.updateGeneration !== thisGeneration) return;

      let worldBrief = this.cachedBrief;
      const now = Date.now();

      if (!worldBrief || now - this.lastBriefUpdate > InsightsPanel.BRIEF_COOLDOWN_MS) {
        this.setProgress(3, totalSteps, t('components.insights.generatingBrief'));

        // Pass focal point context + theater posture to AI for correlation-aware summarization
        // Tech variant: no geopolitical context, just tech news summarization
        // Commodity variant: commodities-specific framing for gold/metals/energy markets
        // Energy variant: energy-specific framing — pipelines, chokepoints, shortages, disruptions
        const theaterContext = SITE_VARIANT === 'full' ? this.getTheaterPostureContext() : '';
        let geoContext = SITE_VARIANT === 'full'
          ? (focalSummary.aiContext || signalSummary.aiContext) + theaterContext
          : SITE_VARIANT === 'commodity'
            ? 'You are generating a commodities market brief. Focus on gold and precious metals price movements, mining supply risks, energy market dynamics, and macro factors driving commodity prices. Highlight supply disruptions, geopolitical risks to mining regions, central bank gold activity, and USD/inflation trends.'
            : SITE_VARIANT === 'energy'
              ? 'You are generating a global energy-intelligence brief. Focus on physical supply: oil & gas pipeline status and disruptions (Druzhba, Nord Stream, TurkStream, Power of Siberia, CPC), chokepoint flow (Hormuz, Malacca, Suez, Bab el-Mandeb, Turkish Straits, Danish Straits, Panama), storage levels (EU gas, US SPR, IEA stocks, days-of-cover), fuel shortages (jet / petrol / diesel / heating oil), refinery outages, LNG flows, OPEC+ production signals, and sanctions impacts. Prefer physical constraints and evidence-grounded status changes over price commentary. Attribute every flow figure to its source (AIS calibration, operator disclosure, regulator data) — never ship a bare conclusion.'
              : '';
        const insightsFw = getActiveFrameworkForPanel('insights');
        if (insightsFw) {
          geoContext = `${geoContext}\n\n---\nAnalytical Framework:\n${insightsFw.systemPromptAppend}`;
        }
        const result = await generateSummary(titles, (_step, _total, msg) => {
          // Show sub-progress for summarization
          this.setProgress(3, totalSteps, `Generating brief: ${msg}`);
        }, geoContext, undefined, summarizeOpts);

        if (this.updateGeneration !== thisGeneration) return;

        if (result) {
          worldBrief = result.summary;
          this.cachedBrief = worldBrief;
          this.lastBriefUpdate = now;
          void setPersistentCache(InsightsPanel.BRIEF_CACHE_KEY, { summary: worldBrief });
        }
      } else {
        this.setProgress(3, totalSteps, 'Using cached brief...');
      }

      this.setDataBadge(worldBrief ? 'live' : 'unavailable');

      // Step 4: Wait for parallel analysis to complete
      this.setProgress(4, totalSteps, 'Multi-perspective analysis...');
      await parallelPromise;

      if (this.updateGeneration !== thisGeneration) return;

      this.renderInsights(importantItems, sentiments, worldBrief);
    } catch (error) {
      console.error('[InsightsPanel] Error:', error);
      this.showError();
    }
  }

  private renderInsights(
    items: Array<{ cluster: ClusteredEvent; isq: SignalQuality }>,
    sentiments: Array<{ label: string; score: number }> | null,
    worldBrief: string | null
  ): void {
    const clusters = items.map(({ cluster }) => cluster);
    const briefHtml = worldBrief ? this.renderWorldBrief(worldBrief) : '';
    const focalPointsHtml = this.renderFocalPoints();
    const convergenceHtml = this.renderConvergenceZones();
    const sentimentOverview = this.renderSentimentOverview(sentiments);
    const breakingHtml = this.renderBreakingStories(items, sentiments);
    const statsHtml = this.renderStats(clusters);
    const missedHtml = this.renderMissedStories();

    this.setContent(`
      ${briefHtml}
      ${focalPointsHtml}
      ${convergenceHtml}
      ${sentimentOverview}
      ${statsHtml}
      <div class="insights-section">
        <div class="insights-section-title">BREAKING & CONFIRMED</div>
        ${breakingHtml}
      </div>
      ${missedHtml}
    `);
  }

  private renderServerInsights(
    insights: ServerInsights,
    sentiments: Array<{ label: string; score: number }> | null,
  ): void {
    const briefHtml = insights.worldBrief ? this.renderWorldBrief(insights.worldBrief) : '';
    const focalPointsHtml = this.renderFocalPoints();
    const convergenceHtml = this.renderConvergenceZones();
    const sentimentOverview = this.renderSentimentOverview(sentiments);
    const storiesHtml = this.renderServerStories(insights.topStories, sentiments);
    const statsHtml = this.renderServerStats(insights);
    const missedHtml = this.renderMissedStories();

    this.setContent(`
      ${briefHtml}
      ${focalPointsHtml}
      ${convergenceHtml}
      ${sentimentOverview}
      ${statsHtml}
      <div class="insights-section">
        <div class="insights-section-title">BREAKING & CONFIRMED</div>
        ${storiesHtml}
      </div>
      ${missedHtml}
    `);
  }

  private renderServerStories(
    stories: ServerInsightStory[],
    sentiments: Array<{ label: string; score: number }> | null,
  ): string {
    return stories.map((story, i) => {
      const sentiment = sentiments?.[i];
      const sentimentClass = sentiment?.label === 'negative' ? 'negative' :
        sentiment?.label === 'positive' ? 'positive' : 'neutral';

      const badges: string[] = [];

      if (story.sourceCount >= 3) {
        badges.push(`<span class="insight-badge confirmed">✓ ${story.sourceCount} sources</span>`);
      } else if (story.sourceCount >= 2) {
        badges.push(`<span class="insight-badge multi">${story.sourceCount} sources</span>`);
      }

      if (story.isAlert) {
        badges.push('<span class="insight-badge alert">⚠ ALERT</span>');
      }

      const VALID_THREAT_LEVELS = ['critical', 'high', 'elevated', 'moderate', 'medium', 'low', 'info'];
      if (story.threatLevel === 'critical' || story.threatLevel === 'high') {
        const safeThreat = VALID_THREAT_LEVELS.includes(story.threatLevel) ? story.threatLevel : 'moderate';
        badges.push(`<span class="insight-badge velocity ${safeThreat}">${escapeHtml(story.category)}</span>`);
      }

      return `
        <div class="insight-story">
          <div class="insight-story-header">
            <span class="insight-sentiment-dot ${sentimentClass}"></span>
            <span class="insight-story-title">${escapeHtml(story.primaryTitle.slice(0, 100))}${story.primaryTitle.length > 100 ? '...' : ''}</span>
          </div>
          ${badges.length > 0 ? `<div class="insight-badges">${badges.join('')}</div>` : ''}
        </div>
      `;
    }).join('');
  }

  private renderServerStats(insights: ServerInsights): string {
    return `
      <div class="insights-stats">
        <div class="insight-stat">
          <span class="insight-stat-value">${insights.multiSourceCount}</span>
          <span class="insight-stat-label">Multi-source</span>
        </div>
        <div class="insight-stat">
          <span class="insight-stat-value">${insights.fastMovingCount}</span>
          <span class="insight-stat-label">Fast-moving</span>
        </div>
        <div class="insight-stat">
          <span class="insight-stat-value">${insights.clusterCount}</span>
          <span class="insight-stat-label">Clusters</span>
        </div>
      </div>
    `;
  }

  private renderWorldBrief(brief: string): string {
    const heading =
      SITE_VARIANT === 'tech'      ? '🚀 TECH BRIEF'
    : SITE_VARIANT === 'commodity' ? '⛏️ COMMODITY BRIEF'
    : SITE_VARIANT === 'energy'    ? '⚡ ENERGY BRIEF'
    :                                '🌍 WORLD BRIEF';
    return `
      <div class="insights-brief">
        <div class="insights-section-title">${heading}</div>
        <div class="insights-brief-text">${escapeHtml(brief)}</div>
      </div>
    `;
  }

  private renderBreakingStories(
    items: Array<{ cluster: ClusteredEvent; isq: SignalQuality }>,
    sentiments: Array<{ label: string; score: number }> | null
  ): string {
    const ISQ_BADGE_CLASS: Record<string, string> = {
      strong: 'isq-strong', notable: 'isq-notable', weak: 'isq-weak', noise: 'isq-noise',
    };

    return items.map(({ cluster, isq }, i) => {
      const sentiment = sentiments?.[i];
      const sentimentClass = sentiment?.label === 'negative' ? 'negative' :
        sentiment?.label === 'positive' ? 'positive' : 'neutral';

      const badges: string[] = [];

      if (isq.tier === 'strong' || isq.tier === 'notable') {
        const cls = ISQ_BADGE_CLASS[isq.tier];
        badges.push(`<span class="insight-badge ${cls}">${isq.tier.toUpperCase()}</span>`);
      }

      if (cluster.sourceCount >= 3) {
        badges.push(`<span class="insight-badge confirmed">✓ ${cluster.sourceCount} sources</span>`);
      } else if (cluster.sourceCount >= 2) {
        badges.push(`<span class="insight-badge multi">${cluster.sourceCount} sources</span>`);
      }

      if (cluster.velocity && cluster.velocity.level !== 'normal') {
        const velIcon = cluster.velocity.trend === 'rising' ? '↑' : '';
        badges.push(`<span class="insight-badge velocity ${cluster.velocity.level}">${velIcon}+${cluster.velocity.sourcesPerHour}/hr</span>`);
      }

      if (cluster.isAlert) {
        badges.push('<span class="insight-badge alert">⚠ ALERT</span>');
      }

      return `
        <div class="insight-story">
          <div class="insight-story-header">
            <span class="insight-sentiment-dot ${sentimentClass}"></span>
            <span class="insight-story-title">${escapeHtml(cluster.primaryTitle.slice(0, 100))}${cluster.primaryTitle.length > 100 ? '...' : ''}</span>
          </div>
          ${badges.length > 0 ? `<div class="insight-badges">${badges.join('')}</div>` : ''}
        </div>
      `;
    }).join('');
  }

  private renderSentimentOverview(sentiments: Array<{ label: string; score: number }> | null): string {
    if (!sentiments || sentiments.length === 0) {
      return '';
    }

    const negative = sentiments.filter(s => s.label === 'negative').length;
    const positive = sentiments.filter(s => s.label === 'positive').length;
    const neutral = sentiments.length - negative - positive;

    const total = sentiments.length;
    const negPct = Math.round((negative / total) * 100);
    const neuPct = Math.round((neutral / total) * 100);
    const posPct = 100 - negPct - neuPct;

    let toneLabel = 'Mixed';
    let toneClass = 'neutral';
    if (negative > positive + neutral) {
      toneLabel = 'Negative';
      toneClass = 'negative';
    } else if (positive > negative + neutral) {
      toneLabel = 'Positive';
      toneClass = 'positive';
    }

    return `
      <div class="insights-sentiment-bar">
        <div class="sentiment-bar-track">
          <div class="sentiment-bar-negative" style="width: ${negPct}%"></div>
          <div class="sentiment-bar-neutral" style="width: ${neuPct}%"></div>
          <div class="sentiment-bar-positive" style="width: ${posPct}%"></div>
        </div>
        <div class="sentiment-bar-labels">
          <span class="sentiment-label negative">${negative}</span>
          <span class="sentiment-label neutral">${neutral}</span>
          <span class="sentiment-label positive">${positive}</span>
        </div>
        <div class="sentiment-tone ${toneClass}">Overall: ${toneLabel}</div>
      </div>
    `;
  }

  private renderStats(clusters: ClusteredEvent[]): string {
    const multiSource = clusters.filter(c => c.sourceCount >= 2).length;
    const fastMoving = clusters.filter(c => c.velocity && c.velocity.level !== 'normal').length;
    const alerts = clusters.filter(c => c.isAlert).length;

    return `
      <div class="insights-stats">
        <div class="insight-stat">
          <span class="insight-stat-value">${multiSource}</span>
          <span class="insight-stat-label">Multi-source</span>
        </div>
        <div class="insight-stat">
          <span class="insight-stat-value">${fastMoving}</span>
          <span class="insight-stat-label">Fast-moving</span>
        </div>
        ${alerts > 0 ? `
        <div class="insight-stat alert">
          <span class="insight-stat-value">${alerts}</span>
          <span class="insight-stat-label">Alerts</span>
        </div>
        ` : ''}
      </div>
    `;
  }

  private get showMlDetected(): boolean {
    try { return localStorage.getItem('wm:debug-ml') === '1'; } catch { return false; }
  }

  private renderMissedStories(): string {
    if (this.lastMissedStories.length === 0 || !this.showMlDetected) {
      return '';
    }

    const storiesHtml = this.lastMissedStories.slice(0, 3).map(story => {
      const topPerspective = story.perspectives
        .filter(p => p.name !== 'keywords')
        .sort((a, b) => b.score - a.score)[0];

      const perspectiveName = topPerspective?.name ?? 'ml';
      const perspectiveScore = topPerspective?.score ?? 0;

      return `
        <div class="insight-story missed">
          <div class="insight-story-header">
            <span class="insight-sentiment-dot ml-flagged"></span>
            <span class="insight-story-title">${escapeHtml(story.title.slice(0, 80))}${story.title.length > 80 ? '...' : ''}</span>
          </div>
          <div class="insight-badges">
            <span class="insight-badge ml-detected">🔬 ${perspectiveName}: ${(perspectiveScore * 100).toFixed(0)}%</span>
          </div>
        </div>
      `;
    }).join('');

    return `
      <div class="insights-section insights-missed">
        <div class="insights-section-title">🎯 ML DETECTED</div>
        ${storiesHtml}
      </div>
    `;
  }

  private renderConvergenceZones(): string {
    if (this.lastConvergenceZones.length === 0) {
      return '';
    }

    const zonesHtml = this.lastConvergenceZones.slice(0, 3).map(zone => {
      const signalIcons: Record<string, string> = {
        internet_outage: '🌐',
        military_flight: '✈️',
        military_vessel: '🚢',
        protest: '🪧',
        ais_disruption: '⚓',
      };

      const icons = zone.signalTypes.map(t => signalIcons[t] || '📍').join('');

      return `
        <div class="convergence-zone">
          <div class="convergence-region">${icons} ${escapeHtml(zone.region)}</div>
          <div class="convergence-description">${escapeHtml(zone.description)}</div>
          <div class="convergence-stats">${zone.signalTypes.length} signal types • ${zone.totalSignals} events</div>
        </div>
      `;
    }).join('');

    return `
      <div class="insights-section insights-convergence">
        <div class="insights-section-title">📍 GEOGRAPHIC CONVERGENCE</div>
        ${zonesHtml}
      </div>
    `;
  }

  private renderFocalPoints(): string {
    // Show focal points with news+signals correlations, or those with active strikes
    const correlatedFPs = this.lastFocalPoints.filter(
      fp => (fp.newsMentions > 0 && fp.signalCount > 0) ||
            fp.signalTypes.includes('active_strike')
    ).slice(0, 5);

    if (correlatedFPs.length === 0) {
      return '';
    }

    const signalIcons: Record<string, string> = {
      internet_outage: '🌐',
      military_flight: '✈️',
      military_vessel: '⚓',
      protest: '📢',
      ais_disruption: '🚢',
      active_strike: '💥',
    };

    const focalPointsHtml = correlatedFPs.map(fp => {
      const urgencyClass = fp.urgency;
      const icons = fp.signalTypes.map(t => signalIcons[t] || '').join(' ');
      const topHeadline = fp.topHeadlines[0];
      const headlineText = topHeadline?.title?.slice(0, 60) || '';
      const headlineUrl = sanitizeUrl(topHeadline?.url || '');

      return `
        <div class="focal-point ${urgencyClass}">
          <div class="focal-point-header">
            <span class="focal-point-name">${escapeHtml(fp.displayName)}</span>
            <span class="focal-point-urgency ${urgencyClass}">${fp.urgency.toUpperCase()}</span>
          </div>
          <div class="focal-point-signals">${icons}</div>
          <div class="focal-point-stats">
            ${fp.newsMentions} news • ${fp.signalCount} signals
          </div>
          ${headlineText && headlineUrl ? `<a href="${headlineUrl}" target="_blank" rel="noopener" class="focal-point-headline">"${escapeHtml(headlineText)}..."</a>` : ''}
        </div>
      `;
    }).join('');

    return `
      <div class="insights-section insights-focal">
        <div class="insights-section-title">🎯 FOCAL POINTS</div>
        ${focalPointsHtml}
      </div>
    `;
  }

  private renderDisabledState(): void {
    this.setContent(`
      <div class="insights-disabled">
        <div class="insights-disabled-icon">⚡</div>
        <div class="insights-disabled-title">${t('components.insights.insightsDisabledTitle')}</div>
        <div class="insights-disabled-hint">${t('components.insights.insightsDisabledHint')}</div>
      </div>
    `);
  }

  private async onAiFlowChanged(): Promise<void> {
    this.updateGeneration++;
    // Reset brief cache so new provider settings take effect immediately
    this.cachedBrief = null;
    this.lastBriefUpdate = 0;
    try {
      await deletePersistentCache(InsightsPanel.BRIEF_CACHE_KEY);
    } catch {
      // Best effort; fallback regeneration still works from memory reset.
    }
    if (!this.element?.isConnected) return;

    if (!isAnyAiProviderEnabled()) {
      this.setDataBadge('unavailable');
      this.renderDisabledState();
      return;
    }

    // Re-run full updateInsights which checks server insights first,
    // then falls back to client-side clustering
    void this.updateInsights(this.lastClusters);
  }

  public override destroy(): void {
    this.aiFlowUnsubscribe?.();
    this.frameworkUnsubscribe?.();
    this.fwSelector?.destroy();
    super.destroy();
  }
}
