import { createDirectus, rest, authentication, readItems } from '@directus/sdk';
import { config } from './config';

const { url, adminEmail, password, token, proxyPath } = config.directus;

const client = createDirectus(url)
    .with(rest())
    .with(authentication());

export async function ensureAuthenticated() {
    if (token) {
        client.setToken(token);
        return;
    }
    if (adminEmail && password) {
        try {
            await client.login(adminEmail, password);
        } catch (e) {
            console.error("Failed to authenticate with Directus:", e);
        }
    }
}

/**
 * Maps the new translation-based schema back to the application's Product interface
 */
function mapDirectusProduct(item: any, locale: string): any {
    const langCode = locale === 'en' ? 'en-US' : 'de-DE';
    const translation = item.translations?.find((t: any) => t.languages_code === langCode) || item.translations?.[0] || {};

    return {
        id: item.id,
        sku: item.sku,
        title: translation.name || '',
        description: translation.description || '',
        content: translation.content || '',
        technicalData: {
            technicalItems: translation.technical_items || [],
            voltageTables: translation.voltage_tables || []
        },
        locale: locale,
        // Use proxy URL for assets to avoid CORS and handle internal/external issues
        data_sheet_url: item.data_sheet ? `${proxyPath}/assets/${item.data_sheet}` : null,
        categories: (item.categories_link || []).map((c: any) => c.categories_id?.translations?.[0]?.name).filter(Boolean)
    };
}

export async function getProducts(locale: string = 'de') {
    await ensureAuthenticated();
    try {
        const items = await client.request(readItems('products', {
            fields: [
                '*',
                'translations.*',
                'categories_link.categories_id.translations.name'
            ]
        }));
        return items.map(item => mapDirectusProduct(item, locale));
    } catch (error) {
        console.error('Error fetching products:', error);
        return [];
    }
}

export async function getProductBySlug(slug: string, locale: string = 'de') {
    await ensureAuthenticated();
    const langCode = locale === 'en' ? 'en-US' : 'de-DE';
    try {
        const items = await client.request(readItems('products', {
            filter: {
                translations: {
                    slug: { _eq: slug },
                    languages_code: { _eq: langCode }
                }
            },
            fields: [
                '*',
                'translations.*',
                'categories_link.categories_id.translations.name'
            ],
            limit: 1
        }));

        if (!items || items.length === 0) return null;
        return mapDirectusProduct(items[0], locale);
    } catch (error) {
        console.error(`Error fetching product ${slug}:`, error);
        return null;
    }
}

export default client;