// This Node.js example calls the Docmosis web service to create a PDF document
// from the default template (samples/WelcomeTemplate.docx).
// To run:
//  1) plug your Docmosis access key into the accessKey variable
//  2) Make sure your you have the correct region specified in the hostname variable
//
// Copyright Docmosis 2019
//

import * as https from "https";
import * as fs from "fs";

// Set your access key here. This is visible in your cloud account in the Docmosis Web Site.
// It is your key to accessing your service - keep it private and safe.
const accessKey = "XXXXX";

// RESTful service host. Set your region here.
// End-point in the USA
const hostname = "us1.dws4.docmosis.com";
// End-point in the EU
//const hostname = "eu1.dws4.docmosis.com";
// End-point in AUS
//const hostname = "au1.dws4.docmosis.com";

// make sure the access key above has been set
if (accessKey == "XXXXX") {
    console.log("Please set your access key in this example");
    process.exit();
}

// The template to use
// NOTE that it has to be defined in your account with the same name specified here
const template = "samples/WelcomeTemplate.docx"; // Change with your actual template name

// The output file name and extension
const output = "myWelcome.pdf";

// The data to use for generating the document
const data = {
    title:"Welcome to Docmosis in the Cloud",
    messages:[
        {"msg":"This cloud experience is better than I thought."},
        {"msg":"The sun is shining."},
        {"msg":"Right, now back to work."}
    ]
}

const postData = new URLSearchParams({
    "accessKey":accessKey,
    "templateName":template,
    "outputName":output,
    "data":JSON.stringify(data)
}).toString();

const options = {
    hostname: hostname,
    port: 443,
    path: "/api/render",
    method: "POST",
    headers: {
        "Content-Type": "application/x-www-form-urlencoded",
        "Content-Length": Buffer.byteLength(postData)
    }
};

const req = https.request(options, (res) => {
    switch (res.statusCode) {
    case 200:
        var file = fs.createWriteStream(output);

        // feed response into file
        res.pipe(file);
        file.on("finish", () => {
            file.close();
            console.log(output, "created");
        });
        break;
    default:
        // 4XX errors - client errors - something needs to be corrected in the request
        // 5XX errors - server side errors - possibly worth a retry

        // show error response (details)
        console.log("Error response:", res.statusCode, res.statusMessage);
        var response = "";
        res.on("data", (data) => {
            response += data;
        });
        res.on("end", () => {
            console.log(response);
        });
    }
});

req.on("error", (e) => {
    console.error("Request error:", JSON.stringify(e, null, 4));
});

// write data to request body
req.write(postData);
req.end();