since3-portal/app/api/templates/[id]/export/route.ts

import type { NextRequest } from "next/server"
import { getProfile } from "@/lib/supabase/dal"
import { buildProject } from "@/modules/templates/export/project"
import { resolveContent } from "@/modules/templates/lib/content"
import { getTemplate } from "@/modules/templates/lib/registry"
import { getVariant } from "@/modules/templates/queries/variants"

// Gespeicherter Stand einer Variante als eigenständiges Next.js-Projekt (ZIP) – nur für Admins
export async function GET(_request: NextRequest, ctx: RouteContext<"/api/templates/[id]/export">) {
    const profile = await getProfile()
    if (profile?.role !== "admin") return Response.json({ error: "Keine Berechtigung." }, { status: 403 })

    const { id } = await ctx.params
    const variant = await getVariant(id)
    const def = variant ? getTemplate(variant.template_key) : undefined
    if (!variant || !def) return Response.json({ error: "Variante nicht gefunden." }, { status: 404 })

    try {
        const { fileName, zip } = await buildProject(def, resolveContent(def, variant.content), variant.name)
        return new Response(zip, {
            headers: {
                "Content-Type": "application/zip",
                "Content-Disposition": `attachment; filename="${fileName}"`,
                "Cache-Control": "no-store",
            },
        })
    } catch (error) {
        console.error("Template export failed:", error)
        return Response.json({ error: "Export fehlgeschlagen." }, { status: 500 })
    }
}