var AzureStorage = {
	params: {},

	setParams: function (params) {
		['token', 'id'].forEach(function (field) {
			if (typeof params !== 'object' || typeof params[field] === 'undefined' || params[field] === '') {
				throw 'Required param is not set: ' + field + '.';
			}
		});

		AzureStorage.params = params;
	},

	request: function (url) {
		var response, request = new HttpRequest();
		if (typeof AzureStorage.params.proxy !== 'undefined' && AzureStorage.params.proxy !== '') {
			request.setProxy(AzureStorage.params.proxy);
		}
		request.addHeader('Accept: application/json');
		request.addHeader('Authorization: Bearer ' + AzureStorage.params.token);
		Zabbix.log(4, '[ Azure ] Sending request: ' + url);
		response = request.get(url);
		if (request.getStatus() !== 200) {
			throw 'Request failed with status code ' + request.getStatus() + ': ' + response;
		}
		try {
			return JSON.parse(response);
		}
		catch (error) {
			throw 'Failed to parse response received from API.';
		}
	},

	getField: function (data, path) {
		var steps = path.split('.');
		for (var i = 0; i < steps.length; i++) {
			var step = steps[i];
			if (typeof data !== 'object' || typeof data[step] === 'undefined') {
				throw 'Required field was not found: ' + path + ' input data: ' + JSON.stringify(data);
			}

			data = data[step];
		}

		return data;
	},

	getMetricsData: function () {
		var data = {};
		start_date = new Date((new Date().getTime()) - 4200000).toISOString().replace(/\.\d+/, '');
		end_date = new Date((new Date().getTime()) - 600000).toISOString().replace(/\.\d+/, '');
		endpoints = {
			'tableServices': '/tableServices/default/providers/Microsoft.Insights/metrics?metricnames=TableCapacity,TableCount,TableEntityCount,Transactions,Ingress,Egress,SuccessServerLatency,SuccessE2ELatency,Availability&api-version=2021-05-01&interval=PT1H&timespan=' + encodeURIComponent(start_date) + '/' + encodeURIComponent(end_date),
			'blobServices': '/blobServices/default/providers/Microsoft.Insights/metrics?metricnames=BlobCapacity,BlobCount,ContainerCount,IndexCapacity,Transactions,Ingress,Egress,SuccessServerLatency,SuccessE2ELatency,Availability&api-version=2021-05-01&interval=PT1H&timespan=' + encodeURIComponent(start_date) + '/' + encodeURIComponent(end_date),
			'fileServices': '/fileServices/default/providers/Microsoft.Insights/metrics?metricnames=FileCapacity,FileCount,FileShareCount,FileShareSnapshotCount,FileShareSnapshotSize,FileShareCapacityQuota,Transactions,Ingress,Egress,SuccessServerLatency,SuccessE2ELatency,Availability&api-version=2021-05-01&interval=PT1H&timespan=' + encodeURIComponent(start_date) + '/' + encodeURIComponent(end_date),
			'storageAccount': '/providers/Microsoft.Insights/metrics?metricnames=UsedCapacity,Transactions,Ingress,Egress,SuccessServerLatency,SuccessE2ELatency,Availability&api-version=2021-05-01&interval=PT1H&timespan=' + encodeURIComponent(start_date) + '/' + encodeURIComponent(end_date),
			'queueServices': '/queueServices/default/providers/Microsoft.Insights/metrics?metricnames=QueueCapacity,QueueCount,QueueMessageCount,Transactions,Ingress,Egress,SuccessServerLatency,SuccessE2ELatency,Availability&api-version=2021-05-01&interval=PT1H&timespan=' + encodeURIComponent(start_date) + '/' + encodeURIComponent(end_date)
		};

		Object.keys(endpoints).forEach(function (field) {
			data[field] = {};
			metrics = AzureStorage.request('https://management.azure.com' + AzureStorage.params.id + endpoints[field]);

			if (!metrics.hasOwnProperty('value')) {
				throw 'Failed getting required field. Check debug log for more information.';
			}

			for (k in metrics.value) {
				key = AzureStorage.getField(metrics.value[k], 'name.value')
				if (metrics.value[k].timeseries.length === 0) {
					metrics.value[k].timeseries.push({ 'data': ['nodata'] })
				}
				data[field][key] = AzureStorage.getField(metrics.value[k], 'timeseries.0.data.0');
			}
		});
		return data
	}

};

try {
	AzureStorage.setParams(JSON.parse(value));
	return JSON.stringify(AzureStorage.getMetricsData());
}
catch (error) {
	error += (String(error).endsWith('.')) ? '' : '.';
	Zabbix.log(3, '[ Azure ] ERROR: ' + error);
	return JSON.stringify({ 'error': error });
}