@isTest
global class WarehouseCalloutServiceMock implements HttpCalloutMock {
    // implement http mock callout
    global HttpResponse respond(HttpRequest request){
        
        System.assertEquals('https://th-superbadge-apex.herokuapp.com/equipment', request.getEndpoint());
        System.assertEquals('GET', request.getMethod());
        
    	// Create a fake response
		HttpResponse response = new HttpResponse();
        response.setHeader('Content-Type', 'application/json');
		response.setBody('[{"_id":"55d66226726b611100aaf741","replacement":false,"quantity":5,"name":"Generator 1000 kW","maintenanceperiod":365,"lifespan":120,"cost":5000,"sku":"100003"}]');
        response.setStatusCode(200);
        return response;
    }
}

@isTest
private class WarehouseCalloutServiceTest {
  // implement your mock callout test here
	@isTest
    static void WarehouseEquipmentSync(){
        Test.startTest();
        // Set mock callout class 
        Test.setMock(HttpCalloutMock.class, new WarehouseCalloutServiceMock()); 
        // This causes a fake response to be sent from the class that implements HttpCalloutMock. 
        WarehouseCalloutService.runWarehouseEquipmentSync();
        Test.stopTest();        
        System.assertEquals(1, [SELECT count() FROM Product2]);        
        
    }
    
}

public with sharing class WarehouseCalloutService {

    private static final String WAREHOUSE_URL = 'https://th-superbadge-apex.herokuapp.com/equipment';
    
    // complete this method to make the callout (using @future) to the
    // REST endpoint and update equipment on hand.
    @future(callout=true)
    public static void runWarehouseEquipmentSync(){
        Http http = new Http();
		HttpRequest request = new HttpRequest();
		request.setEndpoint(WAREHOUSE_URL);
		request.setMethod('GET');
		HttpResponse response = http.send(request);
		// If the request is successful, parse the JSON response.
		if (response.getStatusCode() == 200) {
    		// Deserialize the JSON string into collections of primitive data types.
    		List<Object> equipments = (List<Object>) JSON.deserializeUntyped(response.getBody());
            List<Product2> products = new List<Product2>();
            for(Object o :  equipments){
                Map<String, Object> mapProduct = (Map<String, Object>)o;
                Product2 product = new Product2();
                product.Name = (String)mapProduct.get('name');
                product.Cost__c = (Integer)mapProduct.get('cost');
                product.Current_Inventory__c = (Integer)mapProduct.get('quantity');
                product.Maintenance_Cycle__c = (Integer)mapProduct.get('maintenanceperiod');
                product.Replacement_Part__c = (Boolean)mapProduct.get('replacement');
                product.Lifespan_Months__c = (Integer)mapProduct.get('lifespan');
                product.Warehouse_SKU__c = (String)mapProduct.get('sku');
                product.ProductCode = (String)mapProduct.get('_id');
                products.add(product);
            }
            if(products.size() > 0){
                System.debug(products);
                upsert products;
            }
		}
    }

}