import { NextRequest, NextResponse } from "next/server";
import { z } from "zod";
import { db, users, eq } from "@epicure/db";
import { requireSession } from "@/lib/api-auth";
import { canSelfServeDeveloperAccess } from "@/lib/permissions";

const PatchSchema = z.object({ enabled: z.boolean() });

/** Self-serve on/off for the same isDeveloper flag admin/users/[id] can
 * also set — open to any paid tier, no added fee. Free tier still needs
 * an admin grant (requireAdmin's path, unchanged). */
export async function PATCH(req: NextRequest) {
  const { session, response } = await requireSession();
  if (response) return response;

  const parsed = PatchSchema.safeParse(await req.json());
  if (!parsed.success) {
    return NextResponse.json({ error: "Validation error", issues: parsed.error.issues }, { status: 400 });
  }

  // Turning it off is always allowed, regardless of tier or who granted
  // it — only turning it ON self-serve requires a paid tier.
  if (parsed.data.enabled) {
    // Don't trust session.user.tier — up to 5-minute-stale cookieCache,
    // same reasoning as every other fresh-role/tier re-query in this codebase.
    const [dbUser] = await db.select({ tier: users.tier }).from(users).where(eq(users.id, session!.user.id)).limit(1);
    if (!dbUser || !canSelfServeDeveloperAccess(dbUser)) {
      return NextResponse.json({ error: "Upgrade to a paid plan to enable developer access yourself, or ask an admin" }, { status: 403 });
    }
  }

  await db.update(users).set({ isDeveloper: parsed.data.enabled, updatedAt: new Date() }).where(eq(users.id, session!.user.id));

  return NextResponse.json({ ok: true, isDeveloper: parsed.data.enabled });
}
