/** Create a https, urllib FetchProvider. */

import { Config, Fetcher, Request, URI, Id } from "./CRMWebAPI"
const https = require("https")
const urllib = require("urllib")


export function fetch(config: Config, request: Request,
                        callback: (error: boolean, ctx: any) => void) {
    var parsed_url = urllib.parse(request.url)
    var options = {
	hostname: parsed_url.hostname,
	port: 443,
	path: parsed_url.path,
	method: request.method,
	headers: {
            "Accept": "application/json",
            "OData-MaxVersion": "4.0",
            "OData-Version": "4.0",
	}
    }
    if (['POST', 'PUT', 'PATCH'].indexOf(request.method) >= 0) {
        // GL browser should set this itself
	//options.headers['Content-Length'] = payload.data.length;
	options.headers['Content-Type'] = 'application/json'
    }
    if (config.callerId) options.headers["MSCRMCallerID"] = config.callerId
    if (config.AccessToken)
        options.headers["Authorization"] = "Bearer " + config.AccessToken()
    if (request.headers != undefined) {
	for (var name in request.headers) {
            options.headers[name] = request.headers[name]
	}
    }
    var req = https.request(options, function (res) {
	var body = ''
	res.setEncoding('utf8')
	res.on('data', function (chunk) {
            body += chunk
	})
	res.on('end', function () {
            if ((res.statusCode >= 200) && (res.statusCode < 300)) {
		callback(false, {
                    'response': body,
                    'headers': res.headers
		})
            } else {
		callback(true, {
                    'response': body,
                    'headers': res.headers
		})
            }
	})
    })
    req.on('error', function (err) {
	callback(true, err)
    })
    if (['POST', 'PUT', 'PATCH'].indexOf(request.method) >= 0) {
	req.write(request.data)
    }
    req.end()
}