package org.sonar.report.pdf.entity;

import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;

/**
 *This class encapsulates the measures info.
 */
public class Measures {

    private Hashtable<String, String> measuresTable = new Hashtable<String, String>();
    private Date date;
    private String version;

    private static final String MEASURES = "//projects/project/measures/msr";
    private static final String DATE = "//projects/project/measures/date";
    private static final String VERSION = "//projects/project/measures/version";

    public Date getDate() {
        return date;
    }

    public void setDate(String date) throws ParseException {
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
        this.date = df.parse(date);
    }

    public String getVersion() {
        return version;
    }

    public void setVersion(String version) {
        this.version = version;
    }

    public int getMeasuresCount() {
        return measuresTable.size();
    }

    public Set<String> getMeasuresKeys() {
        return measuresTable.keySet();
    }

    public String getMeasure(String key) {
        return measuresTable.get(key);
    }

    public void addMeasure(String name, String value) {
        measuresTable.put(name, value);
    }
    
    public boolean containsMeasure(String measureKey) {
        return measuresTable.containsKey(measureKey);
    }

    public static Measures parse(String url) throws HttpException, IOException, DocumentException {
        HttpClient client = new HttpClient();
        HttpMethod method = new GetMethod(url);
        int status = 0;
        status = client.executeMethod(method);
        if (!(status == HttpStatus.SC_OK)) {
            return null;
        }

        SAXReader reader = new SAXReader();
        Document document = reader.read(method.getResponseBodyAsStream());
        List<Node> measuresNodes = document.selectNodes(MEASURES);
        Measures measures = new Measures();
        try {
            measures.setDate(document.selectSingleNode(DATE).getText());
        } catch (ParseException e) {
            System.out.println("La fecha no tiene un formato correcto");
            e.printStackTrace();
        }
        measures.setVersion(document.selectSingleNode(VERSION).getText());
        Iterator<Node> it = measuresNodes.iterator();
        while (it.hasNext()) {
            Node n = it.next();
            if(n.selectSingleNode("text_value") != null) {
                measures.addMeasure(n.selectSingleNode("metric").getText(), n.selectSingleNode("text_value").getText());
            } else {
                measures.addMeasure(n.selectSingleNode("metric").getText(), n.selectSingleNode("f_value").getText());
            }
        }
        return measures;
    }
}