package main;

import java.io.IOException;

import data_structure.DenseMatrix;
import utils.Printer;
import algorithms.MF_fastALS;
import algorithms.MF_ALS;
import algorithms.MF_CD;
import algorithms.ItemPopularity;
import algorithms.MFbpr;

public class main_online extends main {
	public static void main(String argv[]) throws IOException {
		String dataset_name = "yelp";
		String method = "FastALS";
		int interval = 1000;
		double w0 = 512;
		int factors = 64;
		int maxIter = 50;
		int maxIterOnline = 1;
		double alpha = 0.4;
		String onlineMode = "ui";
		double w_new = 1;
		
		if (argv.length > 0) {
			dataset_name = argv[0];
			method = argv[1];
			interval = Integer.parseInt(argv[2]);
			w0 = Double.parseDouble(argv[3]);
			factors = Integer.parseInt(argv[4]);
			maxIter = Integer.parseInt(argv[5]);
			maxIterOnline = Integer.parseInt(argv[6]);
			alpha = Double.parseDouble(argv[7]);
			if (argv.length >= 9)	onlineMode = argv[8];
			if (argv.length >= 10) w_new = Double.parseDouble(argv[9]);
		}
		ReadRatings_GlobalSplit("data/" + dataset_name + ".rating", 0.1);
		
		System.out.printf("Online evaluation for %s: factors=%d, maxIter=%d, maxInterOnline=%d, interval=%d, onlineMode(bpr only)=%s\n",
				method, factors, maxIter, maxIterOnline, interval, onlineMode);
		System.out.println("====================================================");
		
		ItemPopularity popularity = new ItemPopularity(trainMatrix, testRatings, topK, threadNum);
		evaluate_model_online(popularity, "Popularity", interval);
		
		double init_mean = 0;
		double init_stdev = 0.01;
		double reg = 0.01;
		boolean showProgress = false;
		boolean showLoss = false;
		
		// Remove ALS is not suitable for online learning.
		if (method.equalsIgnoreCase("als")) {
			MF_ALS als = new MF_ALS(trainMatrix, testRatings, topK, threadNum,
					factors, maxIter, w0, reg, init_mean, init_stdev, showProgress, showLoss);
			als.buildModel();
			als.maxIterOnline = maxIterOnline;
			evaluate_model_online(als, "MF_ALS", interval);
		}
		
		if (method.equalsIgnoreCase("fastals")) {
			MF_fastALS fals = new MF_fastALS(trainMatrix, testRatings, topK, threadNum,
					factors, maxIter, w0, alpha, reg, init_mean, init_stdev, showProgress, showLoss);
			fals.w_new = w_new;
			fals.buildModel();
			fals.maxIterOnline = maxIterOnline;
			evaluate_model_online(fals, "MF_fastALS", interval);
		}
		
		if (method.equalsIgnoreCase("cd")) {
			MF_CD cd = new MF_CD(trainMatrix, testRatings, topK, threadNum,
					factors, maxIter, w0, reg, init_mean, init_stdev, showProgress, showLoss);
			cd.w_new = w_new;
			cd.buildModel();
			cd.maxIterOnline = maxIterOnline;
			evaluate_model_online(cd, "MF_CD", interval);
		}
		
		if (method.equalsIgnoreCase("bpr")) {
			MFbpr bpr = new MFbpr(trainMatrix, testRatings, topK, threadNum, 
					factors, maxIter, 0.01, false, reg, init_mean, init_stdev, 1, showProgress);
			bpr.onlineMode = onlineMode;
			bpr.buildModel();
			bpr.maxIterOnline = maxIterOnline;
			evaluate_model_online(bpr, "BPR", interval);
		}
	
	} // end main
}
