import wx from 'jweixin-module';
import { wechatApi } from '@/api/index.js';

/**
 * 微信 JS-SDK 初始化和扫码功能封装
 */
class WeChatScanService {
	constructor() {
		this.isWxReady = false;
		this.config = {
			debug: true, // 开发环境设置为 true 便于调试
			jsApiList: ['scanQRCode']
		};
	}

	/**
	 * 初始化微信 JS-SDK
	 */
	async initWxSDK() {
		try {
			console.log('[WxSDK] 开始初始化...');

			// 获取当前页面 URL (去掉 hash 部分)
			const currentUrl = window.location.href.split('#')[0];
			console.log('[WxSDK] 当前URL:', currentUrl);

			// 调用后端接口获取签名
			const signatureData = await wechatApi.getJssdkConfig(currentUrl);
			console.log('[WxSDK] 获取到签名配置:', signatureData);

			return new Promise((resolve, reject) => {
				wx.config({
					debug: this.config.debug,
					appId: signatureData.app_id,
					timestamp: signatureData.timestamp,
					nonceStr: signatureData.nonce_str,
					signature: signatureData.signature,
					jsApiList: this.config.jsApiList
				});

				wx.ready(() => {
					console.log('[WxSDK] 初始化成功');
					this.isWxReady = true;
					resolve({ success: true });
				});

				wx.error((res) => {
					console.error('[WxSDK] 初始化失败:', res);
					this.isWxReady = false;
					reject({ success: false, error: res.errMsg || '微信配置失败' });
				});
			});
		} catch (e) {
			console.error('[WxSDK] 初始化异常:', e);
			return { success: false, error: e.message || '初始化失败' };
		}
	}

	/**
	 * 调用微信扫一扫功能
	 */
	async scanQRCode(options = {}) {
		return new Promise((resolve, reject) => {
			if (!this.isWxReady) {
				reject({ success: false, error: '微信 JS-SDK 未就绪,请先初始化' });
				return;
			}

			const defaultOptions = {
				needResult: 1,
				scanType: ['qrCode', 'barCode']
			};

			const scanOptions = { ...defaultOptions, ...options };

			wx.scanQRCode({
				needResult: scanOptions.needResult,
				scanType: scanOptions.scanType,
				success: (res) => {
					console.log('[WxSDK] 扫码成功:', res);
					resolve({
						success: true,
						result: res.resultStr || res.result,
						data: res
					});
				},
				fail: (err) => {
					console.error('[WxSDK] 扫码失败:', err);
					reject({
						success: false,
						error: err,
						message: '扫码失败,请重试'
					});
				}
			});
		});
	}

	/**
	 * 检查是否在微信环境中
	 */
	isInWechat() {
		return /micromessenger/i.test(navigator.userAgent);
	}
}

// 导出单例
export default new WeChatScanService();