import { UTSiOSHookProxy } from "DCloudUniappRuntime";
import { UIApplication } from "UIKit";
import { URL, NSUserActivity } from "Foundation";

export const requestPayment : RequestPayment = function (options : RequestPaymentOptions) {
	Wxpay.requestPayment(options)
};

const wxDefaultErrorCode : number = 700000

const wxErrorCodeMap : Map<number, number> = new Map([
	[-1, 701100],
	[-2, 700601]
])

export class WxpayHookProxy implements UTSiOSHookProxy {
	// 应用正常启动时 (不包括已在后台转到前台的情况)的回调函数。
	applicationDidFinishLaunchingWithOptions(application : UIApplication | null, launchOptions : Map<UIApplication.LaunchOptionsKey, any> | null = null) : boolean {
		Wxpay.share.registerApp()
		return false
	}

	// 通过 url scheme 方式唤起 app 时的回调函数。
	applicationOpenURLOptions(app : UIApplication | null, url : URL, options : Map<UIApplication.OpenURLOptionsKey, any> | null = null) : boolean {
		Wxpay.share.handleOpen(url)
		return true
	}

	// 当应用程序接收到与用户活动相关的数据时调用此方法，例如，当用户使用 Universal Link 唤起应用时。
	applicationContinueUserActivityRestorationHandler(application : UIApplication | null, userActivity : NSUserActivity | null, restorationHandler : ((res : [any] | null) => void) | null = null) : boolean {
		Wxpay.share.handleOpenUniversalLink(userActivity)
		return true
	}
}

export class Wxpay implements WXApiDelegate {
	static share = new Wxpay()

	private options ?: RequestPaymentOptions

	@UTSiOS.keyword("fileprivate")
	registerApp() {
		const scheme = Wxpay.share.getApplicationScheme()
		const universalLink = Wxpay.share.getApplicationUniversalLink()
		if (scheme != null && universalLink != null) {
			WXApi.registerApp(scheme!, universalLink = universalLink!) 
		}
	}

	@UTSiOS.keyword("fileprivate")
	handleOpen(url : URL) {
		WXApi.handleOpen(url, delegate = this)
	}

	@UTSiOS.keyword("fileprivate")
	handleOpenUniversalLink(userActivity : NSUserActivity | null) {
		if (userActivity != null) {
			WXApi.handleOpenUniversalLink(userActivity!, delegate = this)
		}
	}

	private getApplicationScheme() : string | null {
		let scheme : string | null = null
		const infoDictionary = Bundle.main.infoDictionary
		if (infoDictionary != null) {
			const bundleURLTypes = infoDictionary!['CFBundleURLTypes'] as Map<string, any>[] | null
			if (bundleURLTypes != null) {
				bundleURLTypes!.forEach((value, key) => {
					const urlIdentifier = value['CFBundleURLName'] as string | null
					if (urlIdentifier != null && urlIdentifier == "wechat") {
						const urlSchemes = value['CFBundleURLSchemes'] as string[]
						scheme = urlSchemes[0]
					}
				})
			}
		}
		return scheme
	}

	private getApplicationUniversalLink() : string | null {
		let universalLink : string | null = null
		const infoDictionary = Bundle.main.infoDictionary
		if (infoDictionary != null) {
			const wechat = infoDictionary!['WeChat'] as Map<string, any> | null
			if (wechat != null) {
				universalLink = wechat!['universalLink'] as string | null
			}
		}
		return universalLink
	}
	
	//@brief 检查微信是否已被用户安装
	private isWXAppInstalled() : boolean {
		return WXApi.isWXAppInstalled()
	}
	
	//@brief 发送一个sendReq后，收到微信的回应
	onResp(resp : BaseResp) {
		if (resp.errCode == 0) {
			let res : RequestPaymentSuccess = {
				data: resp
			}
			this.options?.success?.(res)
			this.options?.complete?.(res)
		} else {
			const errCode = resp.errCode as number
			let code = wxErrorCodeMap[errCode];
			if (code == null) {
				code = wxDefaultErrorCode
			}
			let err = new RequestPaymentFailImpl(code!);
			this.options?.fail?.(err)
			this.options?.complete?.(err)
		}
	}

	static requestPayment(options : RequestPaymentOptions) {
		Wxpay.share.options = options

		if (Wxpay.share.isWXAppInstalled() == false) {
			let err = new RequestPaymentFailImpl(wxDefaultErrorCode);
			Wxpay.share.options?.fail?.(err)
			Wxpay.share.options?.complete?.(err)
			return
		}

		if (Wxpay.share.getApplicationScheme() == null) {
			let err = new RequestPaymentFailImpl(700800);
			Wxpay.share.options?.fail?.(err)
			Wxpay.share.options?.complete?.(err)
			return
		}

		if (Wxpay.share.getApplicationUniversalLink() == null) {
			let err = new RequestPaymentFailImpl(700801);
			Wxpay.share.options?.fail?.(err)
			Wxpay.share.options?.complete?.(err)
			return
		}

		if (Wxpay.share.options != null) {
			const params = JSON.parse(Wxpay.share.options!.orderInfo) as UTSJSONObject
			const partnerId = params.getString("partnerid")
			const prepayId = params.getString("prepayid")
			const packageV = params.getString("package")
			const nonceStr = params.getString("noncestr")
			const timeStamp = params.getNumber("timestamp")
			const sign = params.getString("sign")

			let request = new PayReq();
			if (partnerId != null) {
				request.partnerId = partnerId!
			}
			if (prepayId != null) {
				request.prepayId = prepayId!
			}
			if (packageV != null) {
				request.package = packageV!
			}
			if (nonceStr != null) {
				request.nonceStr = nonceStr!
			}
			if (timeStamp != null) {
				request.timeStamp = timeStamp!.toUInt32()
			}
			if (sign != null) {
				request.sign = sign!
			}

			//函数调用后，会切换到微信的界面。第三方应用程序等待微信返回onResp。微信在异步处理完成后一定会调用onResp
			WXApi.send(request);
		}
	}
}