import cryptolib from 'aes-ecb';
import NodeRSA from 'node-rsa';

const baseURL = 'https://api.dinger.asia';
const portalUrl = 'https://portal.dinger.asia/gateway';
const creditUrl = 'https://creditcard-portal.dinger.asia';

const uatBaseURL = 'https://staging.dinger.asia/payment-gateway-uat';
const uatPortalUrl = 'https://staging.dinger.asia/gateway';
const uatCreditUrl = 'https://staging-creditcard-portal.dinger.asia/gateway';

export interface PayOptions {
    providerName: string;
    methodName: string;
    totalAmount: number;
    orderId: string;
    customerPhone: string;
    customerName: string;
    description?: string;
    customerAddress?: string;
    email?: string;
    state?: string;
    country?: string;
    postalCode?: string;
    billAddress?: string;
    billCity?: string;
    items: string | {name: string; amount: number; quantity: number}[];
    projectName?: string;
}

export class DingerPay {
    private projectName: string;
    private merchantName: string;
    private apiKey: string;
    private pubKey: string;
    private cbkKey: string;
    private environment: "PRODUCTION" | "UAT";
    private appBaseUrl: string;
    private appPortalUrl: string;
    private appCreditUrl: string;

    constructor(
        projectName: string,
        merchantName: string,
        apiKey: string,
        pubKey: string,
        cbkKey: string,
        environment: "PRODUCTION" | "UAT"
    ) {
        this.projectName = projectName;
        this.merchantName = merchantName;
        this.apiKey = apiKey;
        this.pubKey = pubKey;
        this.cbkKey = cbkKey;
        this.environment = environment;

        if (this.environment === "PRODUCTION") {
            this.appBaseUrl = baseURL;
            this.appPortalUrl = portalUrl;
            this.appCreditUrl = creditUrl;
        } else {
            this.appBaseUrl = uatBaseURL;
            this.appPortalUrl = uatPortalUrl;
            this.appCreditUrl = uatCreditUrl;
        }
    }

    public queryBearerToken = async (): Promise<any> => {
        const url = new URL(`${this.appBaseUrl}/api/token`);
        url.search = new URLSearchParams({
            projectName: this.projectName,
            merchantName: this.merchantName,
            apiKey: this.apiKey
        }).toString();

        const response = await fetch(url.toString(), {
            method: 'GET'
        });
        return await response.json();
    }

    public pay = async (opts: PayOptions): Promise<any> => {
        const payload = JSON.stringify(opts);
        const publicKey = new NodeRSA();
        publicKey.importKey(this.pubKey, 'pkcs8-public');
        publicKey.setOptions({encryptionScheme: 'pkcs1'});

        const token = await this.queryBearerToken();

        const body = new URLSearchParams({
            payload: publicKey.encrypt(payload, 'base64')
        });

        const response = await fetch(`${this.appBaseUrl}/api/pay`, {
            method: 'POST',
            headers: {
                'Authorization': `Bearer ${token.response.paymentToken}`,
                'Content-Type': 'application/x-www-form-urlencoded'
            },
            body: body.toString()
        });

        return await response.json();
    }

    public queryCheckPerson = async (phoneNumber: string, appName: string): Promise<any> => {
        const url = new URL(`${this.appBaseUrl}/checkPhone`);
        url.search = new URLSearchParams({
            phoneNumber,
            appName
        }).toString();

        const response = await fetch(url.toString(), {
            method: 'GET'
        });
        return await response.json();
    }

    public queryCountryCode = async (): Promise<any> => {
        const response = await fetch(`${this.appBaseUrl}/api/countryCodeListEnquiry`, {
            method: 'GET'
        });
        return await response.json();
    }

    public verifyCb = async (opts: {paymentResult: string}): Promise<any> => {
        return JSON.parse(cryptolib.decrypt(this.cbkKey, opts.paymentResult));
    }

    public queryAllNameSpace = async (): Promise<any[]> => {
        return [
            {providerName: "KBZ Pay", methodName: "QR", flow: "QR", logo: ""},
            {providerName: "KBZ Pay", methodName: "PWA", flow: "REDIRECT", logo: ""},
            {providerName: "AYA Pay", methodName: "QR", flow: "QR", logo: ""},
            {providerName: "AYA Pay", methodName: "PIN", flow: "NOTIFICATION", logo: ""},
            {providerName: "Citizens Pay", methodName: "PIN", flow: "REDIRECT", logo: ""},
            {providerName: "Wave Pay", methodName: "PIN", flow: "REDIRECT", logo: ""},
            {providerName: "MPU", methodName: "OTP", flow: "REDIRECT", logo: ""},
            {providerName: "Mytel", methodName: "PIN", flow: "REDIRECT", logo: ""},
            {providerName: "Sai Sai Pay", methodName: "PIN", flow: "NOTIFICATION", logo: ""},
            {providerName: "Onepay", methodName: "PIN", flow: "NOTIFICATION", logo: ""},
            {providerName: "MPitesan", methodName: "PIN", flow: "REDIRECT", logo: ""},
            {providerName: "KBZ Direct Pay", methodName: "PWA", flow: "REDIRECT", logo: ""},
            {providerName: "Visa", methodName: "OTP", flow: "REDIRECT", logo: ""},
            {providerName: "Master", methodName: "OTP", flow: "REDIRECT", logo: ""},
            {providerName: "MPU", methodName: "OTP", flow: "REDIRECT", logo: ""},
            {providerName: "CB Pay", methodName: "QR", flow: "REDIRECT", logo: ""},
            {providerName: "MAB Bank", methodName: "OTP", flow: "REDIRECT", logo: ""},
            {providerName: "MPT Pay", methodName: "PIN", flow: "REDIRECT", logo: ""},
            {providerName: "OK Dollar", methodName: "PIN", flow: "REDIRECT", logo: ""},
            {providerName: "UAB Pay", methodName: "PIN", flow: "NOTIFICATION", logo: ""},
            {providerName: "TrueMoney", methodName: "PIN", flow: "NOTIFICATION", logo: ""},
        ];
    }

    public handleVendorResponse = async (opts: PayOptions, payResponse: any): Promise<any> => {
        const data = payResponse.response;

        let flowOperation = "REDIRECT";
        let redirectLink: string | null = `${this.appPortalUrl}/redirect?transactionNo=${data.transactionNum}&formToken=${data.formToken}&merchantOrderId=${data.merchOrderId}`;
        let qrCode = "";

        if (opts.providerName === "MPU") {
            redirectLink = `${this.appPortalUrl}/mpu?transactionNo=${data.transactionNum}&formToken=${data.formToken}&merchantOrderId=${data.merchOrderId}`;
        }

        if (opts.providerName === "MPitesan") {
            redirectLink = `${this.appPortalUrl}/mpitesan?transactionNo=${data.transactionNum}&formToken=${data.formToken}&merchantOrderId=${data.merchOrderId}`;
        }

        if (opts.providerName === "CB Pay") {
            redirectLink = `${this.appPortalUrl}/cbpay?transactionNo=${data.transactionNum}&formToken=${data.formToken}&merchantOrderId=${data.merchOrderId}`;
        }

        if (
            opts.providerName === "Visa" ||
            opts.providerName === "Master" ||
            opts.providerName === "JCB"
        ) {
            redirectLink = `${this.appCreditUrl}/?transactionNo=${data.transactionNum}&formToken=${data.formToken}&merchantOrderId=${data.merchOrderId}`;
        }

        if (opts.providerName === "KBZ Pay" && opts.methodName === "QR") {
            qrCode = data.qrCode;
            flowOperation = "QR";
            redirectLink = null;
        }

        if (opts.providerName === "AYA Pay" && opts.methodName === "QR") {
            qrCode = data.qrCode;
            flowOperation = "QR";
            redirectLink = null;
        }

        if (opts.providerName === "AYA Pay" && opts.methodName === "PIN") {
            flowOperation = "NOTIFICATION";
            redirectLink = null;
        }

        if (opts.providerName === "Onepay") {
            flowOperation = "NOTIFICATION";
            redirectLink = null;
        }

        if (opts.providerName === "Sai Sai Pay") {
            flowOperation = "NOTIFICATION";
            redirectLink = null;
        }

        if (opts.providerName === "UAB Pay") {
            flowOperation = "NOTIFICATION";
            redirectLink = null;
        }

        return {
            flowOperation: flowOperation,
            redirectLink: redirectLink,
            qrCode: qrCode
        };
    }

    public orderTransactionFee = async (amount: number, vender: string, digital: string = 'no'): Promise<number> => {
        let tx = 0;
        switch (vender) {
            case "KBZ Direct Pay": (digital === 'yes') ? tx = amount * 0.15 : tx = amount * 0.019; break;
            case "KBZ Pay": (digital === 'yes') ? tx = amount * 0.15 : tx = amount * 0.019; break;
            case "Citizens Pay": tx = amount * 0.019; break;
            case "WAVE Pay": tx = amount * 0.034; break;
            case "TrueMoney": tx = (amount * 0.004) + 200; break;
            case "Mytel Pay": tx = amount * 0.02; break;
            case "AYA Pay": tx = amount * 0.007; break;
            case "MPU": tx = (amount * 0.008) + 200; break;
            case "UAB Pay": tx = amount * 0.009; break;
            case "Sai Sai Pay": tx = amount * 0.009; break;
            case "MPitesan": tx = amount * 0.019; break;
            case "Onepay": tx = amount * 0.016; break;
            case "Visa": tx = amount * 0.039; break;
            case "Master": tx = amount * 0.039; break;
            case "JCB": tx = amount * 0.039; break;
            case "CB Pay": tx = amount * 0.015; break;
            case "MAB Bank": (amount < 200000) ? tx = 1200 : tx = amount * 0.01; break;
            case "MPT Pay": tx = amount * 0.015; break;
            case "OK Dollar": tx = amount * 0.004; break;
        }
        return tx;
    }

    public validatePayload = async (opts: PayOptions): Promise<{pass: boolean; message: string}> => {
        let response = {pass: true, message: ""};

        if (!opts.providerName) {response.pass = false; response.message = "[providerName] is required";}
        if (!opts.methodName) {response.pass = false; response.message = "[methodName] is required";}
        if (!opts.totalAmount) {response.pass = false; response.message = "[totalAmount] is required";}
        if (!opts.orderId) {response.pass = false; response.message = "[orderId] is required";}
        if (!opts.customerPhone) {response.pass = false; response.message = "[customerPhone] is required";}
        if (!opts.customerName) {response.pass = false; response.message = "[customerName] is required";}
        if (!opts.items) {response.pass = false; response.message = "[items] is required";}

        let totalAmount = 0;
        const parsedItems = typeof opts.items === 'string' ? JSON.parse(opts.items) : opts.items;

        for (let item of parsedItems) {
            totalAmount += item.amount * item.quantity;
        }

        if (opts.totalAmount != totalAmount) {
            response.pass = false; response.message = "[totalAmount] not matched";
        }

        if (
            opts.providerName === "Visa" ||
            opts.providerName === "Master" ||
            opts.providerName === "JCB"
        ) {
            if (!opts.email) {response.pass = false; response.message = "[email] is required for Visa, Master, JCB";}
            if (!opts.state) {response.pass = false; response.message = "[state] is required for Visa, Master, JCB";}
            if (!opts.country) {response.pass = false; response.message = "[country] is required for Visa, Master, JCB";}
            if (!opts.postalCode) {response.pass = false; response.message = "[postalCode] is required for Visa, Master, JCB";}
            if (!opts.billAddress) {response.pass = false; response.message = "[billAddress] is required for Visa, Master, JCB";}
            if (!opts.billCity) {response.pass = false; response.message = "[billCity] is required for Visa, Master, JCB";}
        }

        if (
            opts.providerName === "Sai Sai Pay" ||
            opts.providerName === "UAB Pay"
        ) {
            const projectName = opts.projectName || this.projectName;
            let personResponse = await this.queryCheckPerson(opts.customerPhone, projectName);
            if (personResponse.response.Code !== "000") {
                response.pass = false; response.message = "[user] is not valid";
            }
        }

        return response;
    }
}