import { sys, native } from "cc";
import { EDITOR, PREVIEW } from "cc/env";

function isWeChatMiniGame(): boolean {
  const g: any = globalThis as any;
  return !!g.wx?.getSystemInfoSync;
}
function isTTMiniGame(): boolean {
  const g: any = globalThis as any;
  return !!g.tt?.getSystemInfoSync;
}

/** 小游戏平台：优先 brand + model */
function tryMiniGameModel(): string | null {
  const g: any = globalThis as any;
  if (g.tt?.getSystemInfoSync) {
    const info = g.tt.getSystemInfoSync();
    const s = `${info.brand ?? ""} ${info.model ?? ""}`.trim();
    return s || null;
  }
  if (g.wx?.getSystemInfoSync) {
    const info = g.wx.getSystemInfoSync();
    const s = `${info.brand ?? ""} ${info.model ?? ""}`.trim();
    return s || null;
  }
  return null;
}

/** 原生：Android 使用 Build.MANUFACTURER + Build.MODEL；iOS 使用硬件码（如 iPhone14,5） */
function tryNativeModel(): string | null {
//   if (!sys.isNative) return null;
//   try {
//     if (sys.platform === sys.Platform.ANDROID) {
//       const s = native.reflection.callStaticMethod(
//         "org/cocos2dx/javascript/AppActivity",
//         "getDeviceModel",
//         "()Ljava/lang/String;"
//       );
//       return (s && String(s).trim()) || null;
//     }
//     if (sys.platform === sys.Platform.IOS) {
//       const s = native.reflection.callStaticMethod("AppController", "getHardwareModel");
//       return (s && String(s).trim()) || null;
//     }
//   } catch {
//     // 反射失败直接兜底
//   }
  return null;
}

/** 浏览器：拿不到“设备名”，仅做极简标识（避免泄露 UA 细节） */
function tryWebHint(): string {
  // 可按需增强：navigator.userAgentData?.platform
  // 这里仅返回平台信息，合规且稳定
  // @ts-ignore
  const plat = (navigator as any)?.userAgentData?.platform || (navigator as any)?.platform || "Web";
  return String(plat);
}

export class MachineInfoService {
  private static _I: MachineInfoService;
  static get I() { return this._I ?? (this._I = new MachineInfoService()); }

  private _cached: string | null = null;

  /** 运行时标签，方便排查：editor / editor-preview / native-android / native-ios / minigame-wechat / minigame-tt / web */
  public runtimeTag(): string {
    if (EDITOR) return PREVIEW ? "editor-preview" : "editor";
    if (sys.isNative) {
      if (sys.platform === sys.Platform.ANDROID) return "native-android";
      if (sys.platform === sys.Platform.IOS) return "native-ios";
      return "native";
    }
    if (isWeChatMiniGame()) return "minigame-wechat";
    if (isTTMiniGame())     return "minigame-tt";
    return "web";
  }

  /** 获取“机器标识”（推荐：品牌+型号/硬件码；编辑器返回固定标识；浏览器返回平台提示） */
  public getMachineIdentifier(): string {
    if (this._cached) return this._cached;

    let id: string | null = null;

    // 1) 编辑器环境：不要做任何原生/平台调用，返回明确标签
    if (EDITOR) {
      id = PREVIEW ? `EditorPreview-${sys.os}` : `Editor-${sys.os}`;
      this._cached = id;
      return id;
    }

    // 浏览器/H5 
    id = tryWebHint();
    return (this._cached = this.trimSafe(id || "Unknown"));    

    // 小游戏
    id = tryMiniGameModel();
    if (id) return (this._cached = this.trimSafe(id));

    // 原生
    id = tryNativeModel();
    if (id) return (this._cached = this.trimSafe(id));
  }

  private trimSafe(s: string): string {
    // 限长，去掉不可见字符，避免异常字符串
    s = s.replace(/[^\x20-\x7E\u4e00-\u9fa5]/g, "").trim();
    if (s.length > 64) s = s.slice(0, 64);
    return s || "Unknown";
  }

  /** 获取机器系统标识  1: android 2:ios; 3: windows */
  public getMachineOs(): number {
    if (EDITOR) {
      return 3;  // 在 Cocos Creator 编辑器里运行
    }
  
    if (sys.platform === sys.Platform.ANDROID) {
      return 1;
    }
    if (sys.platform === sys.Platform.IOS) {
      return 2;
    }
    if (sys.platform === sys.Platform.WIN32) {
      return 3;
    }
    return 3;
  }  
}

export default MachineInfoService;