import { Subject } from 'rxjs';

declare global {
  interface Window {
    WebViewJavascriptBridge: {
      callHandler: (
        name: string,
        args: Record<string, any>,
        callback: (res: string) => void
      ) => void;
      registerHandler: (
        name: string,
        func: (data: string, callback: (res: string) => void) => void
      ) => void;
    };
    WVJBCallbacks: Array<(bridge: typeof window.WebViewJavascriptBridge) => void>;
  }
}

export function setupWebViewJavascriptBridge(
  callback: (bridge: typeof window.WebViewJavascriptBridge) => void
) {
  if (window.WebViewJavascriptBridge) {
    return callback(window.WebViewJavascriptBridge);
  }

  if (/android/i.test(navigator.userAgent)) {
    document.addEventListener(
      'WebViewJavascriptBridgeReady',
      function () {
        callback(window.WebViewJavascriptBridge);
      },
      false
    );
  } else {
    if (window.WVJBCallbacks) {
      return window.WVJBCallbacks.push(callback);
    }
    window.WVJBCallbacks = [callback];
    var WVJBIframe = document.createElement('iframe');
    WVJBIframe.style.display = 'none';
    WVJBIframe.src = 'https://__bridge_loaded__';
    document.documentElement.appendChild(WVJBIframe);
    setTimeout(function () {
      document.documentElement.removeChild(WVJBIframe);
    }, 0);
  }
}

type ShowModelParam = Partial<{
  title: string; // 非必填，但 title 和 content 至少要填一个
  content: string; // 非必填，但 title 和 content 至少要填一个
  contentAlignCenter: boolean; // 内容文本水平居中？ 默认 false,  居左
  showCancel: boolean; // 默认 true
  cancelText: string; //默认 '取消'
  // cancelColor: string; // 默认'#333333'
  confirmText: string; // 默认 '确定'
  // confirmColor: string; // 默认 APP主题色
}>;

// 是否运行在 原生APP 的 WebView 中
const appWebview = navigator.userAgent.includes('iFlyTop-mobile');

const bridgeSub = new Subject<{ func: string; data: Record<string, any> | any[] }>();
export const bridgeOb = bridgeSub.asObservable();

export function registerBridgeFunc() {
  const jsFuncs = ['funcInJs'];
  jsFuncs.forEach((funcName) => {
    window.WebViewJavascriptBridge.registerHandler(funcName, (data, callback) => {
      bridgeSub.next({ func: funcName, data: JSON.parse(data) });
      callback(JSON.stringify({ success: true }));
    });
  });
}

export default class Bridge {
  static register(name: string, func: (data: string, callback: (res: string) => void) => void) {
    if (appWebview) {
      window.WebViewJavascriptBridge.registerHandler(name, func);
    }
  }

  static showModal(param: ShowModelParam) {
    if (appWebview) {
      return new Promise<'confirm' | 'cancel'>((resolve) => {
        window.WebViewJavascriptBridge.callHandler('showModal', param, (res) => {
          resolve(res as 'confirm' | 'cancel');
        });
      });
    } else {
      return Promise.resolve('confirm' as const);
    }
  }
}