import { wechatApi } from '@/api/index.js';

// 动态加载微信 JSSDK
const loadWxJSSDK = () => {
	return new Promise((resolve, reject) => {
		// 如果已经加载,直接返回
		if (window.wx && typeof window.wx.config === 'function') {
			console.log('微信JSSDK已存在');
			resolve();
			return;
		}

		// 检查是否已经有 script 标签在加载
		const existingScript = document.querySelector('script[src*="jweixin"]');
		if (existingScript) {
			console.log('检测到JSSDK脚本标签,等待加载完成...');
			// 等待已有的脚本加载完成
			let count = 0;
			const maxCount = 50;
			const timer = setInterval(() => {
				count++;
				if (window.wx && typeof window.wx.config === 'function') {
					clearInterval(timer);
					console.log('微信JSSDK加载成功');
					resolve();
				} else if (count >= maxCount) {
					clearInterval(timer);
					reject(new Error('微信JSSDK加载超时'));
				}
			}, 100);
			return;
		}

		console.log('开始动态加载微信JSSDK...');
		// 动态创建 script 标签
		const script = document.createElement('script');
		script.type = 'text/javascript';
		script.src = 'https://res.wx.qq.com/open/js/jweixin-1.6.0.js';

		script.onload = () => {
			console.log('微信JSSDK脚本加载完成');
			if (window.wx && typeof window.wx.config === 'function') {
				resolve();
			} else {
				reject(new Error('微信JSSDK脚本加载失败'));
			}
		};

		script.onerror = () => {
			console.error('微信JSSDK脚本加载失败');
			reject(new Error('微信JSSDK脚本加载失败,请检查网络'));
		};

		document.head.appendChild(script);
	});
};

export const initWxSdk = async () => {
	// #ifdef H5
	try {
		// 动态加载微信 JSSDK
		await loadWxJSSDK();

		const currentUrl = window.location.href.split('#')[0];
		console.log('JSSDK URL:', currentUrl);
		const data = await wechatApi.getJssdkConfig(currentUrl);
		console.log('JSSDK Config:', data);

		window.wx.config({
			debug: true,
			appId: data.app_id,
			timestamp: data.timestamp,
			nonceStr: data.nonce_str,
			signature: data.signature,
			jsApiList: ['scanQRCode']
		});

		return new Promise((resolve) => {
			window.wx.ready(() => {
				console.log('微信SDK配置成功');
				resolve({ success: true });
			});
			window.wx.error((err) => {
				console.error('wx.config error:', err);
				resolve({ success: false, error: err.errMsg || '微信配置失败' });
			});
		});
	} catch (e) {
		console.error('WX SDK init failed', e);
		return { success: false, error: e.message || '微信JSSDK未加载,请在微信中打开' };
	}
	// #endif
	// #ifndef H5
	return { success: false, error: '请在H5环境中使用' };
	// #endif
};