import { NextRequest, NextResponse } from "next/server";
import { sameOriginJson } from "@/lib/csrf";
import { allow, clientIp } from "@/lib/ratelimit";
import { currentOperator } from "@/lib/ops/session";
import { ControlError, deleteFacility, PLAN_NOTE_MAX, planControl, resetDemoNow, setSwitch, type PlanAct } from "@/lib/ops/controls";

export const dynamic = "force-dynamic";

/* The console's one write endpoint. Each action is a function in lib/ops/controls.ts; this route
 * checks the operator, shapes the input and turns a ControlError into a status. */
export async function POST(req: NextRequest) {
  const csrf = sameOriginJson(req);
  if (csrf) return NextResponse.json({ error: csrf }, { status: 403 });
  const op = await currentOperator();
  if (!op) return NextResponse.json({ error: "Not signed in" }, { status: 401 });

  const ip = clientIp(req.headers);
  if (!allow("ops-controls:" + op.id, 30, 15 * 60 * 1000)) {
    return NextResponse.json({ error: "Too many changes — try again in a few minutes." }, { status: 429 });
  }

  let body: Record<string, unknown>;
  try { body = await req.json(); } catch { return NextResponse.json({ error: "Bad request" }, { status: 400 }); }
  const s = (k: string, max = 200) => String(body[k] ?? "").slice(0, max);
  const facilityId = s("facilityId", 40);
  const idOk = /^[a-z0-9]{20,40}$/.test(facilityId);

  try {
    switch (s("action", 40)) {
      case "switch": {
        const key = s("key", 40);
        if (key !== "signupsDisabled" && key !== "demoDisabled" && key !== "plansLive") return NextResponse.json({ error: "Unknown switch" }, { status: 400 });
        await setSwitch(op, key, body.value === true, ip);
        return NextResponse.json({ ok: true });
      }
      case "demo.reset":
        await resetDemoNow(op, ip);
        return NextResponse.json({ ok: true });
      case "plan": {
        if (!idOk) return NextResponse.json({ error: "Bad request" }, { status: 400 });
        const num = (k: string) => Number(body[k]);
        let a: PlanAct;
        switch (s("act", 20)) {
          case "set": a = { act: "set", plan: s("plan", 40), planNote: s("planNote", PLAN_NOTE_MAX + 1), grandfathered: typeof body.grandfathered === "boolean" ? body.grandfathered : undefined }; break;
          case "trial": a = { act: "trial", days: num("days") }; break;
          case "paid": a = { act: "paid", months: num("months") }; break;
          case "readonly": a = { act: "readonly", on: body.on === true }; break;
          case "free": a = { act: "free" }; break;
          default: return NextResponse.json({ error: "Unknown plan action" }, { status: 400 });
        }
        await planControl(op, facilityId, a, ip);
        return NextResponse.json({ ok: true });
      }
      case "facility.delete": {
        if (!idOk) return NextResponse.json({ error: "Bad request" }, { status: 400 });
        const r = await deleteFacility(op, facilityId, s("confirm", 200), s("code", 20), ip);
        return NextResponse.json({ ok: true, deleted: r.name });
      }
      default:
        return NextResponse.json({ error: "Unknown action" }, { status: 400 });
    }
  } catch (e) {
    if (e instanceof ControlError) return NextResponse.json({ error: e.message }, { status: e.status });
    throw e;
  }
}