import * as React from 'react';
import {
    Document,
    Page,
    View,
    Text,
    Image,
    StyleSheet,
} from '@react-pdf/renderer';

// ─── Brand Colors ───────────────────────────────────────────────────────────

const C = {
    primary: '#001a4d', // Navy
    primaryDark: '#000d26', // Deepest Navy
    saturated: '#0117bf',
    accent: '#4da612', // Green
    accentLight: '#e8f5d8',
    black: '#000000',
    white: '#FFFFFF',
    gray050: '#f8f9fa',
    gray100: '#f3f4f6',
    gray200: '#e5e7eb',
    gray300: '#d1d5db',
    gray400: '#9ca3af',
    gray600: '#4b5563',
    gray900: '#111827',
};

// ─── Spacing Scale ──────────────────────────────────────────────────────────

const S = { xs: 4, sm: 8, md: 16, lg: 24, xl: 40, xxl: 56 } as const;

const M = { h: 72, bottom: 96 } as const;
const HEADER_H = 64;
const PAGE_TOP_PADDING = 110;

// ─── Types ──────────────────────────────────────────────────────────────────

export interface BrochureProduct {
    id: number;
    name: string;
    shortDescriptionHtml: string;
    descriptionHtml: string;
    applicationHtml?: string;
    images: string[];
    featuredImage: string | null;
    sku: string;
    slug: string;
    categories: Array<{ name: string }>;
    attributes: Array<{ name: string; options: string[] }>;
    qrWebsite?: string | Buffer;
    qrDatasheet?: string | Buffer;
}

export interface BrochureProps {
    products: BrochureProduct[];
    locale: 'en' | 'de';
    companyInfo: {
        tagline: string;
        values: Array<{ title: string; description: string }>;
        address: string;
        phone: string;
        email: string;
        website: string;
    };
    logoBlack?: string | Buffer;
    logoWhite?: string | Buffer;
    introContent?: { title: string; excerpt: string; heroImage?: string | Buffer };
    marketingSections?: Array<{
        title: string;
        subtitle: string;
        description?: string;
        items?: Array<{ title: string; description: string }>;
        highlights?: Array<{ value: string; label: string }>;
        pullQuote?: string;
    }>;
    galleryImages?: Array<string | Buffer>;
}

// ─── Helpers ────────────────────────────────────────────────────────────────

const stripHtml = (html: string): string => html.replace(/<[^>]*>/g, '').replace(/\s+/g, ' ').trim();

const L = (locale: 'en' | 'de') => locale === 'de' ? {
    catalog: 'Produktkatalog', subtitle: 'Hochwertige Stromkabel · Mittelspannungslösungen · Solarkabel',
    about: 'Über uns', toc: 'Produktübersicht', overview: 'Produktübersicht',
    application: 'Anwendung', specs: 'Technische Daten', contact: 'Kontakt',
    qrWeb: 'Web', qrPdf: 'PDF', values: 'Unsere Werte', edition: 'Ausgabe', page: 'S.',
} : {
    catalog: 'Product Catalog', subtitle: 'High-Quality Power Cables · Medium Voltage Solutions · Solar Cables',
    about: 'About Us', toc: 'Product Overview', overview: 'Product Overview',
    application: 'Application', specs: 'Technical Data', contact: 'Contact',
    qrWeb: 'Web', qrPdf: 'PDF', values: 'Our Values', edition: 'Edition', page: 'p.',
};

// ─── Text tokens ────────────────────────────────────────────────────────────

const T = {
    label: (d: boolean) => ({ fontSize: 9, fontWeight: 700, color: C.accent, textTransform: 'uppercase' as 'uppercase', letterSpacing: 1.2 }),
    sectionTitle: (d: boolean) => ({ fontSize: 24, fontWeight: 700, color: d ? C.white : C.primaryDark, letterSpacing: -0.5 }),
    body: (d: boolean) => ({ fontSize: 10, color: d ? C.gray300 : C.gray600, lineHeight: 1.7 }),
    bodyLead: (d: boolean) => ({ fontSize: 13, color: d ? C.white : C.gray900, lineHeight: 1.8 }),
    bodyBold: (d: boolean) => ({ fontSize: 10, fontWeight: 700, color: d ? C.white : C.primaryDark }),
    caption: (d: boolean) => ({ fontSize: 8, color: d ? C.gray400 : C.gray400, textTransform: 'uppercase' as 'uppercase', letterSpacing: 1 }),
};

// ─── Rich Text (supports **bold** and *italic*) ────────────────────────────

const RichText: React.FC<{ children: string; style?: any; paragraphGap?: number; isDark?: boolean; asParagraphs?: boolean }> = ({ children, style = {}, paragraphGap = 8, isDark = false, asParagraphs = true }) => {
    const paragraphs = asParagraphs ? children.split('\n\n').filter(p => p.trim()) : [children];
    return (
        <View style={{ gap: paragraphGap }}>
            {paragraphs.map((para, pIdx) => {
                const parts: Array<{ text: string; bold?: boolean; italic?: boolean }> = [];
                let remaining = para;
                while (remaining.length > 0) {
                    const boldMatch = remaining.match(/\*\*(.+?)\*\*/);
                    const italicMatch = remaining.match(/(?<!\*)\*(?!\*)(.+?)(?<!\*)\*(?!\*)/);
                    const firstMatch = [boldMatch, italicMatch].filter(Boolean).sort((a, b) => (a!.index || 0) - (b!.index || 0))[0];
                    if (!firstMatch || firstMatch.index === undefined) { parts.push({ text: remaining }); break; }
                    if (firstMatch.index > 0) parts.push({ text: remaining.substring(0, firstMatch.index) });
                    parts.push({ text: firstMatch[1], bold: firstMatch[0].startsWith('**'), italic: !firstMatch[0].startsWith('**') });
                    remaining = remaining.substring(firstMatch.index + firstMatch[0].length);
                }
                return (
                    <Text key={pIdx} style={style}>
                        {parts.map((part, i) => (
                            <Text key={i} style={{
                                ...(part.bold ? { fontWeight: 700, fontFamily: 'Helvetica-Bold', color: isDark ? C.white : C.primaryDark } : {}),
                                ...(part.italic ? { fontWeight: 700, fontFamily: 'Helvetica-Bold', color: C.accent } : {}),
                            }}>{part.text}</Text>
                        ))}
                    </Text>
                );
            })}
        </View>
    );
};

// ─── Reusable Components ────────────────────────────────────────────────────

const FixedHeader: React.FC<{ logoWhite?: string | Buffer; logoBlack?: string | Buffer; rightText?: string; isDark?: boolean }> = ({ logoWhite, logoBlack, rightText, isDark }) => {
    const logo = isDark ? (logoWhite || logoBlack) : logoBlack;
    return (
        <View style={{
            position: 'absolute', top: 0, left: 0, right: 0, height: HEADER_H,
            paddingHorizontal: M.h, paddingTop: 24, paddingBottom: 16,
            flexDirection: 'row', justifyContent: 'space-between', alignItems: 'center',
            borderBottomWidth: 0.5, borderBottomColor: isDark ? 'rgba(255,255,255,0.1)' : C.gray300, borderBottomStyle: 'solid',
            backgroundColor: isDark ? C.primaryDark : C.white,
        }} fixed>
            {logo ? <Image src={logo} style={{ width: 64 }} /> : <Text style={{ fontSize: 16, fontWeight: 700, color: isDark ? C.white : C.primaryDark }}>KLZ</Text>}
            {rightText && <Text style={{ fontSize: 8, fontWeight: 700, color: isDark ? C.white : C.primary, letterSpacing: 0.8, textTransform: 'uppercase' }}>{rightText}</Text>}
        </View>
    );
};

const Footer: React.FC<{ left: string; right: string; logoWhite?: string | Buffer; logoBlack?: string | Buffer; isDark?: boolean }> = ({ left, right, logoWhite, logoBlack, isDark }) => {
    const logo = isDark ? (logoWhite || logoBlack) : logoBlack;
    return (
        <View style={{
            position: 'absolute', bottom: 40, left: M.h, right: M.h,
            flexDirection: 'row', justifyContent: 'space-between', alignItems: 'center',
            paddingTop: 12,
            borderTopWidth: 0.5, borderTopColor: isDark ? 'rgba(255,255,255,0.1)' : C.gray300, borderTopStyle: 'solid',
        }} fixed>
            <View style={{ flexDirection: 'row', alignItems: 'center', gap: 8 }}>
                {logo && <Image src={logo} style={{ width: 40, height: 'auto' }} />}
                <Text style={T.caption(!!isDark)}>{left}</Text>
            </View>
            <Text style={T.caption(!!isDark)}>{right}</Text>
        </View>
    );
};

const SectionHeading: React.FC<{ label?: string; title: string, isDark: boolean }> = ({ label, title, isDark }) => (
    <View style={{ marginBottom: S.lg }} minPresenceAhead={120}>
        {label && <Text style={{ ...T.label(isDark), marginBottom: S.sm }}>{label}</Text>}
        <Text style={{ ...T.sectionTitle(isDark), marginBottom: S.md }}>{title}</Text>
        <View style={{ width: 48, height: 4, backgroundColor: C.accent }} />
    </View>
);

// Pull-quote callout block
const PullQuote: React.FC<{ quote: string, isDark: boolean }> = ({ quote, isDark }) => (
    <View style={{
        marginVertical: S.xl,
        paddingLeft: S.lg,
        borderLeftWidth: 4, borderLeftColor: C.accent, borderLeftStyle: 'solid',
    }}>
        <Text style={{ fontSize: 16, fontWeight: 700, color: isDark ? C.white : C.primaryDark, lineHeight: 1.5, letterSpacing: -0.2 }}>
            „{quote}"
        </Text>
    </View>
);

// Stat highlight boxes
const HighlightRow: React.FC<{ highlights: Array<{ value: string; label: string }>, isDark: boolean }> = ({ highlights, isDark }) => (
    <View style={{ flexDirection: 'row', gap: S.md, marginVertical: S.lg }}>
        {highlights.map((h, i) => (
            <View key={i} style={{
                flex: 1,
                backgroundColor: isDark ? 'rgba(255,255,255,0.03)' : C.gray050,
                borderLeftWidth: 3, borderLeftColor: C.accent, borderLeftStyle: 'solid',
                paddingVertical: S.md, paddingHorizontal: S.md,
                alignItems: 'flex-start',
            }}>
                <Text style={{ fontSize: 18, fontWeight: 700, color: isDark ? C.white : C.primaryDark, marginBottom: 4 }}>{h.value}</Text>
                <Text style={{ fontSize: 9, color: isDark ? C.gray400 : C.gray600, textTransform: 'uppercase', letterSpacing: 0.5 }}>{h.label}</Text>
            </View>
        ))}
    </View>
);

// Magazine Edge-to-Edge Image
// By using negative horizontal margin (-M.h) matching the parent padding, it touches the very edges.
// By using negative vertical margin matching the vertical padding, it touches the top or bottom of the colored block!
const MagazineImage: React.FC<{ src: string | Buffer; height?: number; position: 'top' | 'bottom' | 'middle'; isDark?: boolean }> = ({ src, height = 260, position, isDark }) => {
    if (Buffer.isBuffer(src) && src.length === 0) return null;

    const marginTop = position === 'top' ? -S.xxl : (position === 'middle' ? S.xl : S.xxl);
    const marginBottom = position === 'bottom' ? -S.xxl : (position === 'middle' ? S.xl : S.xxl);

    return (
        <View style={{
            marginHorizontal: -M.h,
            height,
            marginTop,
            marginBottom,
            position: 'relative'
        }}>
            <Image src={src} style={{ width: '100%', height: '100%', objectFit: 'cover' }} />
            {isDark && (
                <View style={{ position: 'absolute', top: 0, left: 0, right: 0, bottom: 0, backgroundColor: C.primaryDark, opacity: 0.2 }} />
            )}
        </View>
    );
};

// Magazine Block wrapper
const MagazineSection: React.FC<{
    section: NonNullable<BrochureProps['marketingSections']>[0];
    image?: string | Buffer;
    theme: 'white' | 'gray' | 'dark';
    imagePosition: 'top' | 'bottom' | 'middle';
}> = ({ section, image, theme, imagePosition }) => {
    const isDark = theme === 'dark';
    const bgColor = theme === 'white' ? C.white : (theme === 'gray' ? C.gray050 : C.primaryDark);

    return (
        <View style={{
            marginHorizontal: -M.h,
            paddingHorizontal: M.h,
            paddingVertical: S.xxl,
            backgroundColor: bgColor,
        }} wrap={true}>
            {image && imagePosition === 'top' && <MagazineImage src={image} height={280} position="top" isDark={isDark} />}

            <SectionHeading label={section.subtitle} title={section.title} isDark={isDark} />

            {section.description && (
                <RichText style={T.bodyLead(isDark)} paragraphGap={S.md} isDark={isDark}>
                    {section.description}
                </RichText>
            )}

            {image && imagePosition === 'middle' && <MagazineImage src={image} height={220} position="middle" isDark={isDark} />}

            {section.highlights && section.highlights.length > 0 && (
                <HighlightRow highlights={section.highlights} isDark={isDark} />
            )}

            {section.pullQuote && <PullQuote quote={section.pullQuote} isDark={isDark} />}

            {section.items && section.items.length > 0 && (
                <View style={{ flexDirection: 'row', flexWrap: 'wrap', gap: S.xl, marginTop: S.xl }}>
                    {section.items.map((item, i) => (
                        <View key={i} style={{ width: '45%', marginBottom: S.sm }} minPresenceAhead={60}>
                            <View style={{ width: 24, height: 2, backgroundColor: C.accent, marginBottom: S.sm }} />
                            <Text style={{ ...T.bodyBold(isDark), fontSize: 11, marginBottom: 4 }}>{item.title}</Text>
                            <RichText style={{ ...T.body(isDark) }} asParagraphs={false} isDark={isDark}>
                                {item.description}
                            </RichText>
                        </View>
                    ))}
                </View>
            )}

            {image && imagePosition === 'bottom' && <MagazineImage src={image} height={320} position="bottom" isDark={isDark} />}
        </View>
    );
};

// ─── Cover Page ─────────────────────────────────────────────────────────────

const CoverPage: React.FC<{
    locale: 'en' | 'de';
    introContent?: BrochureProps['introContent'];
    logoBlack?: string | Buffer;
    logoWhite?: string | Buffer;
    galleryImages?: Array<string | Buffer>;
}> = ({ locale, introContent, logoWhite, logoBlack, galleryImages }) => {
    const l = L(locale);
    const dateStr = new Date().toLocaleDateString(locale === 'en' ? 'en-US' : 'de-DE', { year: 'numeric', month: 'long' });
    const bgImage = galleryImages?.[0] || introContent?.heroImage;
    const logo = logoWhite || logoBlack;

    return (
        <Page size="A4" style={{ backgroundColor: C.primaryDark, fontFamily: 'Helvetica' }}>
            {bgImage && (
                <View style={{ position: 'absolute', top: 0, left: 0, right: 0, bottom: 0 }}>
                    <Image src={bgImage} style={{ width: '100%', height: '100%', objectFit: 'cover' }} />
                    <View style={{ position: 'absolute', top: 0, left: 0, right: 0, bottom: 0, backgroundColor: C.primaryDark, opacity: 0.85 }} />
                </View>
            )}
            <View style={{ position: 'absolute', top: 0, left: 0, width: 6, height: 320, backgroundColor: C.accent }} />

            <View style={{ flex: 1, paddingHorizontal: M.h }}>
                <View style={{ marginTop: 80 }}>
                    {logo ? <Image src={logo} style={{ width: 140 }} /> : <Text style={{ fontSize: 28, fontWeight: 700, color: C.white }}>KLZ</Text>}
                </View>

                <View style={{ marginTop: 180 }}>
                    <View style={{ width: 48, height: 4, backgroundColor: C.accent, borderRadius: 2, marginBottom: S.xl }} />
                    <Text style={{ fontSize: 48, fontWeight: 700, color: C.white, textTransform: 'uppercase', letterSpacing: 0.5, lineHeight: 1.1, marginBottom: S.md }}>
                        {l.catalog}
                    </Text>
                    <Text style={{ fontSize: 16, color: C.gray300, lineHeight: 1.6, maxWidth: 360 }}>
                        {introContent?.excerpt || l.subtitle}
                    </Text>
                </View>

                <View style={{ position: 'absolute', bottom: S.xxl, left: M.h, right: M.h, flexDirection: 'row', justifyContent: 'space-between', alignItems: 'center' }}>
                    <Text style={{ fontSize: 10, color: C.gray400, textTransform: 'uppercase', letterSpacing: 1 }}>{l.edition} {dateStr}</Text>
                    <Text style={{ fontSize: 10, color: C.white, fontWeight: 700 }}>www.klz-cables.com</Text>
                </View>
            </View>
        </Page>
    );
};

// ─── Info Flow ──────────────────────────────────────────────────────────────

const InfoFlow: React.FC<{
    locale: 'en' | 'de';
    companyInfo: BrochureProps['companyInfo'];
    marketingSections?: BrochureProps['marketingSections'];
    logoBlack?: string | Buffer;
    galleryImages?: Array<string | Buffer>;
}> = ({ locale, companyInfo, marketingSections, logoBlack, galleryImages }) => {
    const l = L(locale);

    return (
        <Page size="A4" wrap style={{ backgroundColor: C.white, fontFamily: 'Helvetica', paddingTop: PAGE_TOP_PADDING, paddingBottom: M.bottom }}>
            <FixedHeader logoBlack={logoBlack} rightText="KLZ Cables" isDark={false} />
            <Footer left="KLZ Cables" right={companyInfo.website} logoBlack={logoBlack} isDark={false} />

            <View style={{ paddingHorizontal: M.h }}>

                {/* ── About KLZ ── */}
                <View style={{
                    marginHorizontal: -M.h, paddingHorizontal: M.h,
                    paddingTop: S.xxl, paddingBottom: S.xl,
                    backgroundColor: C.white,
                }}>
                    <View style={{ flexDirection: 'row', gap: S.xl }}>
                        <View style={{ flex: 1.5 }}>
                            <SectionHeading label={l.about} title="KLZ Cables" isDark={false} />
                            <RichText style={{ ...T.bodyLead(false), fontSize: 14, lineHeight: 1.6 }} paragraphGap={S.md} isDark={false}>
                                {companyInfo.tagline}
                            </RichText>
                        </View>
                        <View style={{ flex: 1 }}>
                            {galleryImages?.[1] && (
                                <View style={{ width: '100%', height: 240, borderLeftWidth: 4, borderLeftColor: C.accent, borderLeftStyle: 'solid' }}>
                                    <Image src={galleryImages[1]} style={{ width: '100%', height: '100%', objectFit: 'cover' }} />
                                </View>
                            )}
                        </View>
                    </View>

                    <View style={{ marginTop: S.xxl }}>
                        <Text style={{ ...T.label(false), marginBottom: S.md }}>{l.values}</Text>
                        <View style={{ flexDirection: 'row', flexWrap: 'wrap', gap: S.lg }}>
                            {companyInfo.values.map((v, i) => (
                                <View key={i} style={{ width: '47%', marginBottom: S.md }} minPresenceAhead={40}>
                                    <Text style={{ ...T.bodyBold(false), fontSize: 11, marginBottom: 4 }}>
                                        <Text style={{ color: C.accent }}>0{i + 1}</Text> {'\u00A0'} {v.title}
                                    </Text>
                                    <Text style={{ ...T.body(false), fontSize: 9 }}>{v.description}</Text>
                                </View>
                            ))}
                        </View>
                    </View>
                </View>

                {/* ── Marketing Sections ── */}
                {marketingSections?.map((section, sIdx) => {
                    const themes: Array<'white' | 'gray' | 'dark'> = ['gray', 'dark', 'white', 'gray', 'white', 'dark'];
                    const imagePositions: Array<'top' | 'bottom' | 'middle'> = ['bottom', 'top', 'bottom', 'middle', 'middle', 'top'];
                    const theme = themes[sIdx % themes.length];
                    const pos = imagePositions[sIdx % imagePositions.length];
                    const img = galleryImages?.[sIdx + 2];

                    return (
                        <MagazineSection
                            key={`m-${sIdx}`}
                            section={section}
                            image={img}
                            theme={theme}
                            imagePosition={pos}
                        />
                    );
                })}
            </View>
        </Page>
    );
};

// ─── TOC Page ───────────────────────────────────────────────────────────────

const TocPage: React.FC<{
    products: BrochureProduct[];
    locale: 'en' | 'de';
    logoBlack?: string | Buffer;
    productStartPage: number;
    galleryImages?: Array<string | Buffer>;
}> = ({ products, locale, logoBlack, productStartPage, galleryImages }) => {
    const l = L(locale);

    const grouped = new Map<string, Array<{ product: BrochureProduct, pageNum: number }>>();
    let currentGlobalIdx = 0;
    for (const p of products) {
        const cat = p.categories[0]?.name || 'Other';
        if (!grouped.has(cat)) grouped.set(cat, []);
        grouped.get(cat)!.push({ product: p, pageNum: productStartPage + currentGlobalIdx });
        currentGlobalIdx++;
    }

    return (
        <Page size="A4" style={{ backgroundColor: C.white, fontFamily: 'Helvetica', paddingTop: PAGE_TOP_PADDING, paddingBottom: M.bottom }}>
            <FixedHeader logoBlack={logoBlack} rightText={l.overview} />
            <Footer left="KLZ Cables" right="www.klz-cables.com" logoBlack={logoBlack} />

            <View style={{ paddingHorizontal: M.h }}>
                <SectionHeading label={l.catalog} title={l.toc} isDark={false} />

                {/* Decorative image edge-to-edge */}
                {galleryImages?.[5] && (
                    <View style={{ marginHorizontal: -M.h, height: 160, marginBottom: S.xxl }}>
                        <Image src={galleryImages[5]} style={{ width: '100%', height: '100%', objectFit: 'cover' }} />
                    </View>
                )}

                <View style={{ flexDirection: 'column' }}>
                    {Array.from(grouped.entries()).map(([cat, items]) => (
                        <View key={cat} style={{ width: '100%', marginBottom: S.md }}>
                            <View style={{ borderBottomWidth: 1.5, borderBottomColor: C.primaryDark, borderBottomStyle: 'solid', paddingBottom: S.xs, marginBottom: S.sm }}>
                                <Text style={{ ...T.label(false) }}>{cat}</Text>
                            </View>
                            {items.map((item, i) => (
                                <View key={i} style={{
                                    flexDirection: 'row', alignItems: 'center', justifyContent: 'space-between',
                                    paddingVertical: 5,
                                    borderBottomWidth: i < items.length - 1 ? 0.5 : 0,
                                    borderBottomColor: C.gray200, borderBottomStyle: 'solid',
                                }}>
                                    <Text style={{ fontSize: 11, fontWeight: 700, color: C.primaryDark }}>{item.product.name}</Text>
                                    <Text style={{ fontSize: 10, color: C.gray400 }}>{l.page} {item.pageNum}</Text>
                                </View>
                            ))}
                        </View>
                    ))}
                </View>
            </View>
        </Page>
    );
};

// ─── Product Block ──────────────────────────────────────────────────────────

const ProductBlock: React.FC<{
    product: BrochureProduct;
    locale: 'en' | 'de';
}> = ({ product, locale }) => {
    const l = L(locale);
    const desc = stripHtml(product.applicationHtml || product.shortDescriptionHtml || product.descriptionHtml);
    const LABEL_WIDTH = 260; // Wider label container for technical data

    return (
        <View>
            <SectionHeading
                label={product.categories.map(c => c.name).join(' · ')}
                title={product.name}
                isDark={false}
            />

            {/* Edge-to-edge product image */}
            <View style={{
                marginHorizontal: -M.h,
                height: 200, justifyContent: 'center', alignItems: 'center',
                backgroundColor: C.gray050,
                borderTopWidth: 0.5, borderTopColor: C.gray200, borderTopStyle: 'solid',
                borderBottomWidth: 0.5, borderBottomColor: C.gray200, borderBottomStyle: 'solid',
                marginBottom: S.xl, padding: S.lg
            }}>
                {product.featuredImage ? (
                    <Image src={product.featuredImage} style={{ width: '100%', height: '100%', objectFit: 'contain' }} />
                ) : (
                    <Text style={{ fontSize: 10, color: C.gray400 }}>—</Text>
                )}
            </View>

            {/* Description + QR */}
            <View style={{ flexDirection: 'row', gap: S.xl, marginBottom: S.xl }}>
                <View style={{ flex: 1.8 }}>
                    {desc && (
                        <View>
                            <Text style={{ ...T.label(false), marginBottom: S.md }}>{l.application}</Text>
                            <RichText style={{ ...T.body(false), lineHeight: 1.8 }}>{desc}</RichText>
                        </View>
                    )}
                </View>
                <View style={{ flex: 1, flexDirection: 'column', justifyContent: 'flex-start' }}>
                    {(product.qrWebsite || product.qrDatasheet) && (
                        <View style={{ flexDirection: 'column', gap: S.md }}>
                            {product.qrWebsite && (
                                <View style={{ flexDirection: 'row', alignItems: 'center', gap: S.md }}>
                                    <View style={{ padding: 4, borderWidth: 1, borderColor: C.gray200, borderStyle: 'solid' }}>
                                        <Image src={product.qrWebsite} style={{ width: 44, height: 44 }} />
                                    </View>
                                    <View>
                                        <Text style={{ ...T.caption(false), fontWeight: 700, color: C.primaryDark, marginBottom: 2 }}>{l.qrWeb}</Text>
                                        <Text style={{ fontSize: 8, color: C.gray400 }}>{locale === 'de' ? 'Produktseite' : 'Product Page'}</Text>
                                    </View>
                                </View>
                            )}
                            {product.qrDatasheet && (
                                <View style={{ flexDirection: 'row', alignItems: 'center', gap: S.md }}>
                                    <View style={{ padding: 4, borderWidth: 1, borderColor: C.gray200, borderStyle: 'solid' }}>
                                        <Image src={product.qrDatasheet} style={{ width: 44, height: 44 }} />
                                    </View>
                                    <View>
                                        <Text style={{ ...T.caption(false), fontWeight: 700, color: C.primaryDark, marginBottom: 2 }}>{l.qrPdf}</Text>
                                        <Text style={{ fontSize: 8, color: C.gray400 }}>{locale === 'de' ? 'Datenblatt' : 'Datasheet'}</Text>
                                    </View>
                                </View>
                            )}
                        </View>
                    )}
                </View>
            </View>

            {/* Technical Data Table — clean, minimal header, wider labels */}
            {product.attributes && product.attributes.length > 0 && (
                <View>
                    <Text style={{ ...T.label(false), marginBottom: S.sm }}>{l.specs}</Text>

                    <View style={{
                        flexDirection: 'row',
                        borderBottomWidth: 1.5, borderBottomColor: C.primaryDark, borderBottomStyle: 'solid',
                        paddingBottom: S.xs, marginBottom: 4,
                    }}>
                        <View style={{ width: LABEL_WIDTH, paddingHorizontal: 10 }}>
                            <Text style={{ ...T.label(false), fontSize: 7, color: C.gray600 }}>
                                {locale === 'de' ? 'Eigenschaft' : 'Property'}
                            </Text>
                        </View>
                        <View style={{ flex: 1, paddingHorizontal: 10 }}>
                            <Text style={{ ...T.label(false), fontSize: 7, color: C.gray600 }}>
                                {locale === 'de' ? 'Wert' : 'Value'}
                            </Text>
                        </View>
                    </View>

                    {/* Rows */}
                    {product.attributes.map((attr, i) => (
                        <View key={i} style={{
                            flexDirection: 'row',
                            borderBottomWidth: i < product.attributes.length - 1 ? 0.5 : 0,
                            borderBottomColor: C.gray200, borderBottomStyle: 'solid',
                            backgroundColor: i % 2 === 0 ? C.white : C.gray050,
                            paddingVertical: 6,
                        }}>
                            <View style={{
                                width: LABEL_WIDTH, paddingHorizontal: 10,
                                borderRightWidth: 1, borderRightColor: C.gray200, borderRightStyle: 'solid',
                            }}>
                                <Text style={{ fontSize: 9, fontWeight: 700, color: C.primaryDark, letterSpacing: 0.2 }}>{attr.name}</Text>
                            </View>
                            <View style={{ flex: 1, paddingHorizontal: 10, justifyContent: 'center' }}>
                                <Text style={{ fontSize: 10, color: C.gray900 }}>{attr.options.join(', ')}</Text>
                            </View>
                        </View>
                    ))}
                </View>
            )}
        </View>
    );
};

// ─── Products Flow ──────────────────────────────────────────────────────────

const ProductsFlow: React.FC<{
    products: BrochureProduct[];
    locale: 'en' | 'de';
    logoBlack?: string | Buffer;
}> = ({ products, locale, logoBlack }) => {
    const l = L(locale);
    return (
        <React.Fragment>
            {products.map((p) => (
                <Page key={p.id} size="A4" style={{ backgroundColor: C.white, fontFamily: 'Helvetica', paddingTop: PAGE_TOP_PADDING, paddingBottom: M.bottom }}>
                    <FixedHeader logoBlack={logoBlack} rightText={l.overview} />
                    <Footer left="KLZ Cables" right="www.klz-cables.com" logoBlack={logoBlack} />
                    <View style={{ paddingHorizontal: M.h }}>
                        <ProductBlock product={p} locale={locale} />
                    </View>
                </Page>
            ))}
        </React.Fragment>
    );
};

// ─── Back Cover ─────────────────────────────────────────────────────────────

const BackCoverPage: React.FC<{
    companyInfo: BrochureProps['companyInfo'];
    locale: 'en' | 'de';
    logoWhite?: string | Buffer;
    galleryImages?: Array<string | Buffer>;
}> = ({ companyInfo, locale, logoWhite, galleryImages }) => {
    const l = L(locale);
    const bgImage = galleryImages?.[6];

    return (
        <Page size="A4" style={{ backgroundColor: C.primaryDark, fontFamily: 'Helvetica' }}>
            {bgImage && (
                <View style={{ position: 'absolute', top: 0, left: 0, right: 0, bottom: 0 }}>
                    <Image src={bgImage} style={{ width: '100%', height: '100%', objectFit: 'cover' }} />
                    <View style={{ position: 'absolute', top: 0, left: 0, right: 0, bottom: 0, backgroundColor: C.primaryDark, opacity: 0.9 }} />
                </View>
            )}

            <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center', padding: M.h }}>
                {logoWhite ? (
                    <Image src={logoWhite} style={{ width: 180, marginBottom: S.xl }} />
                ) : (
                    <Text style={{ fontSize: 32, fontWeight: 700, color: C.white, letterSpacing: 2, textTransform: 'uppercase', marginBottom: S.xl }}>KLZ CABLES</Text>
                )}

                <View style={{ width: 48, height: 4, backgroundColor: C.accent, borderRadius: 2, marginBottom: S.xl }} />

                <View style={{ alignItems: 'center', marginBottom: S.lg }}>
                    <Text style={{ ...T.label(true), marginBottom: S.sm }}>{l.contact}</Text>
                    <Text style={{ fontSize: 13, color: C.white, lineHeight: 1.7, textAlign: 'center' }}>{companyInfo.address}</Text>
                </View>

                <View style={{ alignItems: 'center', marginBottom: S.lg }}>
                    <Text style={{ fontSize: 13, color: C.white }}>{companyInfo.phone}</Text>
                    <Text style={{ fontSize: 13, color: C.gray300 }}>{companyInfo.email}</Text>
                </View>

                <Text style={{ fontSize: 14, fontWeight: 700, color: C.accent, marginTop: S.lg }}>{companyInfo.website}</Text>
            </View>

            <View style={{ position: 'absolute', bottom: 40, left: M.h, right: M.h, flexDirection: 'row', justifyContent: 'center' }} fixed>
                <Text style={{ fontSize: 9, color: C.gray400 }}>© {new Date().getFullYear()} KLZ Cables GmbH</Text>
            </View>
        </Page>
    );
};

// ─── Main Document ──────────────────────────────────────────────────────────

export const PDFBrochure: React.FC<BrochureProps> = ({
    products, locale, companyInfo, introContent,
    marketingSections, logoBlack, logoWhite, galleryImages,
}) => {
    const productStartPage = 5;

    return (
        <Document>
            <CoverPage locale={locale} introContent={introContent} logoBlack={logoBlack} logoWhite={logoWhite} galleryImages={galleryImages} />
            <InfoFlow locale={locale} companyInfo={companyInfo} marketingSections={marketingSections} logoBlack={logoBlack} galleryImages={galleryImages} />
            <TocPage products={products} locale={locale} logoBlack={logoBlack} productStartPage={productStartPage} galleryImages={galleryImages} />
            <ProductsFlow products={products} locale={locale} logoBlack={logoBlack} />
            <BackCoverPage companyInfo={companyInfo} locale={locale} logoWhite={logoWhite} galleryImages={galleryImages} />
        </Document>
    );
};