package geniusweb.blingbling;

import java.math.BigInteger;
import java.util.HashMap;
import java.util.Map;

import geniusweb.issuevalue.Bid;
import geniusweb.issuevalue.Value;
import geniusweb.issuevalue.DiscreteValueSet;
import geniusweb.issuevalue.ValueSet;

//
//Old represent is the orignial SFM model.

public class IssueTracker {
    private String issue;
    private int numValues;
    private int seenValues = 0;

    private Map<Value, ValueTracker> valueTrackers = new HashMap<Value, ValueTracker>();
    private Value maxValue = null;
    private DiscreteValueSet valueset = null;
    private int maxValueCount = 0;

    private double weight = 0.0;

    public IssueTracker(String issuename, ValueSet valueset) {
//        if (valueset instanceof DiscreteValueSet)
//            throw new RuntimeException("Opponent model is designed for discrete issues only");

        this.issue = issuename;
        this.valueset = (DiscreteValueSet) valueset;
        this.numValues = Integer.valueOf(this.valueset.size().toString());//transfer biginteger to int
    }

    public void registerValue(Value value, int bidsReceived) {//bidsReceived指的是收到的bid的总长度。
        // create value tracker if needed
        if (valueTrackers.get(value) == null) {
            valueTrackers.put(value, new ValueTracker());
            seenValues++;
        }

        // register max offered value with count
        int valueCount = valueTrackers.get(value).incrementGet();
        if (valueCount > maxValueCount) {
            maxValueCount = valueCount;
            maxValue = value;
        }

        // update issue weight
        if (numValues > 1) {
            double equalShares = ((double) bidsReceived / (double) numValues);
            weight = ((double) maxValueCount - equalShares) / ((double) bidsReceived - equalShares);
        }

        // update all value evaluations
        for (ValueTracker valueTracker : valueTrackers.values())
            valueTracker.updateEvaluation(maxValueCount, weight);
    }

    public double getEvaluationOld(Value value) {//原SFM的eval
        return (valueTrackers.get(value) == null) ? 0.0
                : ((double) valueTrackers.get(value).getCount() / (double) maxValueCount);
    }

    public double getEvaluation(Value value) {
        return (valueTrackers.get(value) == null) ? 0.0 : valueTrackers.get(value).getEvaluation();
    }

    public double getWeight() {
        return weight;
    }

    public double getOldWeight(int bidsReceived) {
        return (bidsReceived == 0) ? 0.0 : (double) maxValueCount / (double) bidsReceived;
    }

    public Value getMaxValue() {
        return maxValue;
    }

    public String toString() {
        return issue.toString() + ":\n" + valueTrackers.toString() + "\n";
    }
}