import { boolText, formatDuration } from './session.js?v=20260427c';

export function buildProfile(session) {
    const endedAt = session.endedAt || Date.now();
    const durationMs = endedAt - session.startedAt;
    const accepted = session.behavioral.promptDecisions.filter((decision) => decision.accepted).length;
    const segment = buildSegment(session, accepted);
    const impressionValue = estimateImpressionValue(session, accepted);

    session.profile = {
        header: {
            sessionId: session.id,
            duration: formatDuration(durationMs),
            date: new Date(endedAt).toLocaleString(),
        },
        device: deviceLines(session),
        behavioral: behavioralLines(session),
        advertising: {
            segment,
            impressionValue: `$${impressionValue.toFixed(4)} per impression`,
            annualValue: `~$${(impressionValue * 80).toFixed(2)}`,
            auctionId: `#${String(2000000 + (session.currencies.dataShadow * 791) % 7000000).padStart(7, '0')}`,
        },
        context: {
            dataPoints: countDataPoints(session),
            copy: [
                `We used ${countDataPoints(session)} data points.`,
                'Facebook uses around 52,000.',
                'A typical data broker profile contains 1,500+ attributes.',
                'Everything collected here lived in this tab.',
                'The difference is that we showed you the receipt.',
            ],
        },
        callouts: buildCallouts(session, accepted),
    };

    return session.profile;
}

function deviceLines(session) {
    const device = session.device || {};
    const geo = session.geo || {};
    return {
        Browser: device.browser || device.status || 'Unknown',
        OS: device.os || 'Unknown',
        Screen: device.screen || 'Unknown',
        GPU: device.gpu || 'Unknown',
        Language: device.language || 'Unknown',
        Timezone: device.timezone || 'Unknown',
        'Local time': device.localTime || 'Unknown',
        Battery: device.battery || 'Unknown',
        Connection: device.connection || 'Unknown',
        'Dark mode': boolText(device.darkMode),
        'Reduced motion': boolText(device.reducedMotion),
        Touch: device.touchPoints ? `${device.touchPoints} touch points` : 'No / unknown',
        City: geo.city || 'Unknown',
        'VPN likely': boolText(geo.vpnLikely),
        Incognito: boolText(session.incognito?.detected),
    };
}

function behavioralLines(session) {
    const consent = session.consentTelemetry;
    const promptCopy = session.behavioral.promptDecisions.map((decision) => `${decision.accepted ? 'yes' : 'no'}: ${decision.prompt}`).join(', ') || 'None';
    return {
        'Cookie consent': `${consent.choice} in ${(consent.decisionMs / 1000).toFixed(1)} seconds`,
        'Modal scroll': consent.scrolled ? `${consent.maxScrollDepth}%` : 'Did not scroll',
        'Click path': consent.clickPath.map((entry) => entry.label).join(' -> ') || 'None',
        'Ad blocker': session.adblock.tested ? boolText(session.adblock.detected) : 'Not tested',
        'Do Not Track': session.device.doNotTrack || 'Unknown',
        'Prompts': promptCopy,
        'Posts / lurks': `${session.behavioral.posts} / ${session.behavioral.lurks}`,
        'Doppelgangers': String(session.doppelgangers.length),
        'Jumps': String(session.behavioral.jumps),
        'Longest idle': `${Math.round(session.behavioral.longestIdleMs / 1000)} seconds`,
        'Rage taps': String(session.behavioral.rageTaps),
        'Cookies': String(session.currencies.cookies),
        'Data Shadow': String(session.currencies.dataShadow),
    };
}

function buildSegment(session, accepted) {
    const parts = [];
    if ((session.device.timezone || '').includes('/')) parts.push('timezone-coded');
    if (isLateNight()) parts.push('night owl');
    if ((session.device.deviceTier || '').includes('Premium')) parts.push('premium device');
    if (accepted >= 3) parts.push('accepts defaults');
    if (session.behavioral.purchases.length) parts.push('impulse buyer');
    if (session.behavioral.posts > session.behavioral.lurks) parts.push('high engagement');
    if (session.device.darkMode) parts.push('dark-mode native');
    return parts.length ? titleCase(parts.join(', ')) : 'Low-signal, privacy-conscious, hard to target';
}

function estimateImpressionValue(session, accepted) {
    let value = 0.002;
    value += accepted * 0.0011;
    value += session.behavioral.posts * 0.0004;
    value += session.behavioral.purchases.length * 0.0008;
    if (session.device.deviceTier?.includes('Premium')) value += 0.0014;
    if (session.adblock.detected === false) value += 0.001;
    return Math.min(0.018, value);
}

function countDataPoints(session) {
    if (!session.consent.analytics) return 6;
    const deviceCount = Object.values(session.device || {}).filter((value) => value !== undefined && value !== 'Unknown').length;
    const geoCount = session.geo?.status === 'Collected with consent' ? 5 : 0;
    const behaviorCount = 9;
    return deviceCount + geoCount + behaviorCount;
}

function buildCallouts(session, accepted) {
    const callouts = [];
    if (session.consentTelemetry.choice === 'Accepted all') {
        callouts.push(`You accepted our cookie banner in ${(session.consentTelemetry.decisionMs / 1000).toFixed(1)} seconds. People spend longer choosing a sandwich than deciding who gets their data.`);
    }
    if (session.adblock.detected === false) {
        callouts.push('You played the runner on hard mode without an ad blocker. With one, you would have faced fewer ad obstacles.');
    }
    if (session.adblock.detected === true) {
        callouts.push('Your ad blocker made the marketplace easier. That is not cheating. That is self-defense.');
    }
    if (session.geo.vpnLikely === true) {
        callouts.push('Your location data looked inconsistent. A VPN is a start, but your browser, GPU, screen, timezone, and play style still spoke up.');
    }
    if (String(session.device.doNotTrack).toLowerCase() === '1') {
        callouts.push('You enabled Do Not Track. We treated it as a signal, but most websites treat it as a polite suggestion.');
    }
    if (isLateNight()) {
        callouts.push(`It is ${session.device.localTime || 'late'} where you are. Companies know late-night users make different decisions. You accepted ${accepted} permissions tonight.`);
    }
    if (session.behavioral.optOutFound) {
        callouts.push('You found the opt-out clause. Almost nobody does. In real life, it is buried even deeper.');
    }
    if (!session.consent.analytics) {
        callouts.push('You rejected analytics cookies. We honored that, so most of this receipt is intentionally blank.');
    }
    return callouts;
}

function isLateNight() {
    const hour = new Date().getHours();
    return hour < 5 || hour >= 23;
}

function titleCase(value) {
    return value.replace(/\b\w/g, (letter) => letter.toUpperCase());
}