/**
 * 跨平台支付工具类
 * 支持唤起微信/支付宝并打开通联小程序支付
 */
class PaymentUtils {

	// 微信URL Scheme前缀
	static WECHAT_SCHEME_PREFIX = 'weixin://dl/business/?t='

	// 支付宝URL Scheme前缀  
	static ALIPAY_SCHEME_PREFIX = 'alipay://platformapi/startapp?appId='

	/**
	 * 构建微信跳转URL Scheme
	 */
	static buildWechatURLScheme(config) {
		const {
			appId, // 通联小程序AppID
			path = '', // 小程序页面路径
			type = 'release', // 跳转类型
			extraData = {} // 额外参数
		} = config

		let urlScheme = this.WECHAT_SCHEME_PREFIX + Date.now()
		urlScheme += '&appid=' + encodeURIComponent(appId)

		if (path) {
			urlScheme += '&path=' + encodeURIComponent(path)
		}
		if (type) {
			urlScheme += '&miniProgramType=' + type
		}
		if (Object.keys(extraData).length > 0) {
			urlScheme += '&query=' + encodeURIComponent(JSON.stringify(extraData))
		}
		return urlScheme
	}

	/**
	 * 构建支付宝跳转URL Scheme
	 */
	static buildAlipayURLScheme(config) {
		const {
			appId,
			page = '',
			query = {}
		} = config

		let urlScheme = this.ALIPAY_SCHEME_PREFIX + appId

		if (page) {
			urlScheme += '&page=' + encodeURIComponent(page)
		}
		if (Object.keys(query).length > 0) {
			urlScheme += '&query=' + encodeURIComponent(JSON.stringify(query))
		}
		return urlScheme
	}

	/**
	 * 执行跳转
	 */
	static launchApp(urlScheme) {
		return new Promise((resolve, reject) => {
			// #ifdef APP-PLUS
			plus.runtime.openURL(urlScheme, (success) => {
				if (success) {
					resolve({
						success: true
					})
				} else {
					reject(new Error('唤起应用失败'))
				}
			})
			// #endif
		})
	}

	/**
	 * 检查应用是否安装
	 */
	static checkAppInstalled(appType) {
		return new Promise((resolve) => {
			// #ifdef APP-PLUS
			if (appType === 'wechat') {
				if (plus.runtime.isApplicationExist({
						pname: 'com.tencent.mm',
						action: 'weixin://'
					})) {
					resolve(true)
				} else {
					resolve(false)
				}
			}
			// #endif
		})
	}
}

export default PaymentUtils