import type { DeviceHealth, ReaderDevice, ReaderEvent } from "../interfaces.js";
import type { DeviceConfig, ReaderDriver } from "../registry.js";
import { hostField, portField, stubLog } from "./common.js";
import { icmpPing } from "./icmp.js";

// Reader drivers (RF / optical). Two integration paths: Wiegand reads reach the
// access controller directly (autonomous); TCP-IP readers are seen host-side.
// See wiki/concepts/entry-exit-readers.md. STUBS only.

class StubReader implements ReaderDevice {
  #cb: ((r: ReaderEvent) => void) | null = null;
  constructor(
    readonly driverId: string,
    protected readonly config: DeviceConfig,
  ) {}
  async connect(): Promise<void> {
    stubLog(this.driverId, "connect");
  }
  async disconnect(): Promise<void> {
    stubLog(this.driverId, "disconnect");
  }
  /**
   * Liveness. These readers PUSH (scan → GET our backend) and expose no TCP port, so
   * there's nothing to connect-probe. If the admin gave the reader's IP we ICMP-ping
   * it (powered + on-network); a reply → ready, no reply → offline. With NO IP we
   * report `degraded` ("set IP to monitor") rather than a false `ready` — a push
   * device that's silent is indistinguishable from a dead one, so claiming `ready`
   * unconditionally (the old behaviour) hid offline readers behind a green dot.
   */
  async healthCheck(): Promise<DeviceHealth> {
    const host = this.config.host ? String(this.config.host) : "";
    if (!host) {
      return { status: "degraded", detail: "push device — set IP to monitor" };
    }
    const alive = await icmpPing(host);
    return alive
      ? { status: "ready", detail: `ping ${host}` }
      : { status: "offline", detail: `no ping reply from ${host}` };
  }
  onRead(cb: (r: ReaderEvent) => void): void {
    this.#cb = cb;
    stubLog(this.driverId, "onRead handler registered");
  }
  /** Test hook for stubs — real drivers emit from hardware events. */
  protected emit(r: ReaderEvent): void {
    this.#cb?.(r);
  }
}

export const wiegandReaderDriver: ReaderDriver = {
  id: "wiegand-reader",
  category: "reader",
  label: "Wiegand reader (into controller)",
  description:
    "RF/optical reader wired Wiegand 26/34 into the access controller's reader port. Autonomous offline decisions.",
  transports: ["wiegand"],
  configFields: [
    { key: "door", label: "Controller reader port / door", type: "number", required: true, default: 1 },
    { key: "format", label: "Wiegand format", type: "select", required: true, default: "26", options: [
      { value: "26", label: "Wiegand 26" },
      { value: "34", label: "Wiegand 34" },
    ] },
  ],
  create: (c) => new StubReader("wiegand-reader", c),
};

export const tcpipReaderDriver: ReaderDriver = {
  id: "tcpip-reader",
  category: "reader",
  label: "TCP/IP reader (host-side)",
  description:
    "Network RF/optical reader seen only by the host; host decides and commands the relay.",
  transports: ["tcp-ip"],
  configFields: [hostField, portField(9000)],
  create: (c) => new StubReader("tcpip-reader", c),
};

// Dingtian DT-008 QR/RFID access reader (same vendor as the relay board). Scans QR/barcode
// + ID/IC/NFC cards. A PUSH device: on each scan it HTTP-GETs our backend (/qa/mcardsea.<ext>)
// carrying its serial (cjihao); the backend resolves the lane by matching that serial to this
// device's `serial` config, decides, and replies the verdict (drives the beep). No host-side
// connection — the adapter is a stub; the real integration is the HTTP endpoint (apps/server
// routes/qr-reader.ts). Interfaces: Wiegand 26/34, TCP/IP, USB, RS485. See
// wiki/entities/dingtian-dt008-reader.md.
export const dingtianQrReaderDriver: ReaderDriver = {
  id: "dingtian-qr-reader",
  category: "reader",
  label: "Dingtian DT-008 QR/RFID reader (HTTP push)",
  description:
    "Dingtian DT-008 QR/barcode/RFID access reader that HTTP-pushes each scan to the backend. Set its server IP/port to this host in the vendor tool; enter its serial here so scans resolve to this lane.",
  transports: ["tcp-ip"],
  configFields: [
    {
      key: "serial",
      label: "Device serial (cjihao)",
      type: "string",
      required: true,
      help: "The reader's serial as it reports in each scan (the `cjihao` field). Used to map scans to this lane.",
    },
    {
      // OPTIONAL: the reader pushes by serial (operation needs no IP), but giving its
      // IP lets the status monitor ICMP-ping it for a real online/offline dot instead
      // of an always-green stub. Leave blank to skip monitoring (shows "set IP").
      ...hostField,
      required: false,
      help: "Optional: the reader's IP, used ONLY to monitor it (ping). Scans still resolve by serial. Leave blank to skip liveness monitoring.",
    },
  ],
  create: (c) => new StubReader("dingtian-qr-reader", c),
};