/**
 * A deliberately narrow MAIN-world bridge for the mature 1688/Taobao/Tmall
 * structured collectors. It never exposes cookies, headers, arbitrary window
 * keys, or a generic fetch primitive; only public product-state projections.
 */
export default defineContentScript({
    matches: [
        '*://detail.1688.com/*',
        '*://item.taobao.com/*',
        '*://detail.tmall.com/*',
    ],
    world: 'MAIN',
    runAt: 'document_idle',
    main() {
        window.addEventListener('message', (event) => {
            if (event.source !== window || !isRequest(event.data)) return;
            const data = event.data.platform === '1688'
                ? project1688((window as unknown as Record<string, unknown>).context)
                : projectTaobao(window as unknown as Record<string, unknown>);
            window.postMessage({
                source: 'atlas-collector',
                type: 'source-page-state.response',
                requestId: event.data.requestId,
                data,
            }, location.origin);
        });
    },
});

type Request = { source: 'atlas-collector'; type: 'source-page-state.request'; requestId: string; platform: '1688' | 'taobao' | 'tmall' };
function isRequest(value: unknown): value is Request {
    if (!value || typeof value !== 'object' || Array.isArray(value)) return false;
    const data = value as Record<string, unknown>;
    return data.source === 'atlas-collector' && data.type === 'source-page-state.request'
        && typeof data.requestId === 'string' && /^[a-zA-Z0-9-]{16,120}$/.test(data.requestId)
        && (data.platform === '1688' || data.platform === 'taobao' || data.platform === 'tmall');
}

const safeClone = (value: unknown) => { try { return JSON.parse(JSON.stringify(value)); } catch { return undefined; } };
function find(value: unknown, key: string): unknown {
    const pending: unknown[] = [value];
    const seen = new Set<object>();
    let visited = 0;
    while (pending.length && visited < 300_000) {
        const current = pending.shift();
        if (!current || typeof current !== 'object' || seen.has(current)) continue;
        seen.add(current);
        visited += 1;
        const record = current as Record<string, unknown>;
        if (key in record) return record[key];
        pending.push(...Object.values(record));
    }
    return undefined;
}
function project1688(context: unknown) {
    const projected: Record<string, unknown> = {};
    for (const key of ['gallery', 'tempModel', 'skuModel', 'tradeModel', 'skuMapOriginal', 'pieceWeightScaleInfo', 'productAttributes']) {
        const value = find(context, key);
        if (value !== undefined) projected[key] = safeClone(value);
    }
    return projected;
}
function projectTaobao(windowState: Record<string, unknown>) {
    const ice = windowState.__ICE_APP_CONTEXT__ as Record<string, unknown> | undefined;
    const result = ice?.loaderData && typeof ice.loaderData === 'object'
        ? (((ice.loaderData as Record<string, unknown>).home as Record<string, unknown> | undefined)?.data as Record<string, unknown> | undefined)?.res
        : undefined;
    return { product: safeClone(result) };
}