content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.bigtop.datagenerators.bigpetstore.cli;
  
  import java.util.Collections;
  import java.util.List;
  import java.util.Vector;
  
  import org.apache.bigtop.datagenerators.bigpetstore.Constants;
  import org.apache.bigtop.datagenerators.bigpetstore.CustomerGenerator;
  import org.apache.bigtop.datagenerators.bigpetstore.ProductGenerator;
  import org.apache.bigtop.datagenerators.bigpetstore.PurchasingModelGenerator;
  import org.apache.bigtop.datagenerators.bigpetstore.StoreGenerator;
  import org.apache.bigtop.datagenerators.bigpetstore.TransactionGenerator;
  import org.apache.bigtop.datagenerators.bigpetstore.datamodels.Customer;
  import org.apache.bigtop.datagenerators.bigpetstore.datamodels.Store;
  import org.apache.bigtop.datagenerators.bigpetstore.datamodels.Transaction;
  import org.apache.bigtop.datagenerators.bigpetstore.datamodels.inputs.InputData;
  import org.apache.bigtop.datagenerators.bigpetstore.datamodels.inputs.ProductCategory;
  import org.apache.bigtop.datagenerators.bigpetstore.generators.purchase.PurchasingModel;
  import org.apache.bigtop.datagenerators.samplers.SeedFactory;
  import org.apache.bigtop.datagenerators.samplers.samplers.RouletteWheelSampler;
  import org.apache.bigtop.datagenerators.samplers.samplers.Sampler;
  
  import com.google.common.collect.Lists;
  
  public class Simulation
  {
  	InputData inputData;
  	SeedFactory seedFactory;
  	int nStores;
  	int nCustomers;
  	int nPurchasingModels;
  	double simulationTime;
  
  	List<Store> stores;
  	List<Customer> customers;
  	Sampler<PurchasingModel> purchasingModelSampler;
  	List<PurchasingModel> purchasingProfiles;
  	List<Transaction> transactions;
  	List<ProductCategory> productCategories;
  
  	public Simulation(InputData inputData, int nStores, int nCustomers, int nPurchasingModels, double simulationTime, long seed)
  	{
  		this.inputData = inputData;
  		this.nStores = nStores;
  		this.nCustomers = nCustomers;
  		this.nPurchasingModels = nPurchasingModels;
  		this.simulationTime = simulationTime;
  		seedFactory = new SeedFactory(seed);
  	}
  
  	public void generateStores() throws Exception
  	{
  		System.out.println("Generating stores");
  		StoreGenerator storeGenerator = new StoreGenerator(inputData, seedFactory);
  
  		stores = new Vector<Store>();
  		for(int i = 0; i < nStores; i++)
  		{
  			Store store = storeGenerator.generate();
  			stores.add(store);
  		}
  
  		stores = Collections.unmodifiableList(stores);
  
  		System.out.println("Generated " + stores.size() + " stores");
  	}
  
  	public void generateCustomers() throws Exception
  	{
  		System.out.println("Generating customers");
  		CustomerGenerator generator = new CustomerGenerator(inputData, stores, seedFactory);
  
  		customers = new Vector<Customer>();
  		for(int i = 0; i < nCustomers; i++)
  		{
  			Customer customer = generator.generate();
  			customers.add(customer);
  		}
  
  		customers = Collections.unmodifiableList(customers);
  
  		System.out.println("Generated " + customers.size() + " customers");
  	}
  
  	public void generateProducts()
  	{
  		System.out.println("Generating products");
  		ProductGenerator generator = new ProductGenerator(Constants.PRODUCTS_COLLECTION);
  		productCategories = generator.generate();
  	}
  
  	public void generatePurchasingProfiles() throws Exception
  	{
  		System.out.println("Generating purchasing profiles");
  		PurchasingModelGenerator generator = new PurchasingModelGenerator(productCategories, seedFactory);
  
  		purchasingProfiles = new Vector<PurchasingModel>();
  		for(int i = 0; i < nPurchasingModels; i++)
  		{
  			PurchasingModel profile = generator.generate();
  			purchasingProfiles.add(profile);
  		}
  
  		System.out.println("Generated " + purchasingProfiles.size() + " purchasing profiles");
  
  		purchasingModelSampler = RouletteWheelSampler.createUniform(purchasingProfiles, seedFactory);
  	}
  
  	public void generateTransactions() throws Exception
  	{
  		System.out.println("Generating transactions");
  		transactions = Lists.newArrayList();
  
  		for(int i = 0; i < nCustomers; i++)
  		{
  			Customer customer = customers.get(i);
  			PurchasingModel profile = purchasingModelSampler.sample();
  
  			TransactionGenerator generator = new TransactionGenerator(customer,
  					profile, productCategories, seedFactory);
  
  			while(true)
  			{
  				Transaction transaction = generator.generate();
  
  				if(transaction.getDateTime() > simulationTime)
  					break;
  				transactions.add(transaction);
  			}
  		}
  
  		System.out.println("Generated " + transactions.size() + " transactions");
  	}
  
  	public void simulate() throws Exception
  	{
  		generateStores();
  		generateCustomers();
  		generateProducts();
  		generatePurchasingProfiles();
  		generateTransactions();
  	}
  
  	public List<Store> getStores()
  	{
  		return stores;
  	}
  
  	public List<Customer> getCustomers()
  	{
  		return customers;
  	}
  
  	public List<Transaction> getTransactions()
  	{
  		return transactions;
  	}
  
  	public InputData getInputData()
  	{
  		return inputData;
  	}
  
  	public List<ProductCategory> getProductCategories()
  	{
  		return this.productCategories;
  	}
  
  	public List<PurchasingModel> getPurchasingProfiles()
  	{
  		return this.purchasingProfiles;
  	}
  }
  