package de.vanitasvitae.imi.codes.types;

import java.util.stream.IntStream;

/**
 * Identification Code for Sample Tubes.
 */
public class SampleTubeCode implements CharSequence {

    private final StudyNumber studyNumber;
    private final SampleType sampleType;
    private final int sampleNumber;

    /**
     * Create a new {@link SampleTubeCode} object.
     * This constructor throws an {@link IllegalArgumentException}, if one of the following cases is happening:
     * - {@code studyNumber} is null
     * - {@code sampleType} is null
     * - {@code sampleNumber is negative or greater than 9999}
     *
     * @param studyNumber code that identifies the associated study
     * @param sampleType type of the sample
     * @param sampleNumber number of the sample
     */
    public SampleTubeCode(StudyNumber studyNumber, SampleType sampleType, int sampleNumber) {
        if (studyNumber == null) {
            throw new IllegalArgumentException("StudyNumber MUST NOT be null.");
        }
        if (sampleType == null) {
            throw new IllegalArgumentException("SampleType MUST NOT be null.");
        }
        if (sampleNumber < 0 || sampleNumber > 9999) {
            throw new IllegalArgumentException("SampleNumber MUST BE an integer between 0 and 9999 (inclusive).");
        }
        this.studyNumber = studyNumber;
        this.sampleType = sampleType;
        this.sampleNumber  = sampleNumber;
    }


    @Override
    public int length() {
        return toString().length();
    }

    @Override
    public char charAt(int i) {
        return toString().charAt(i);
    }

    @Override
    public CharSequence subSequence(int a, int b) {
        return toString().subSequence(a, b);
    }

    @Override
    public IntStream chars() {
        return toString().chars();
    }

    @Override
    public IntStream codePoints() {
        return toString().codePoints();
    }

    @Override
    public int hashCode() {
        return toString().hashCode();
    }

    @Override
    public boolean equals(Object o) {
        return toString().equals(o.toString());
    }

    @Override
    public String toString() {
        String number = String.format("%04d", sampleNumber);
        return studyNumber.toString() + sampleType.toString() + number;
    }
}